Purinergic Receptors,Past and Future (Closing Remarks)

Abstract

At the end of a symposium, it is useful to look back, both at the symposium itself and the developments that led up to the symposium. In this spirit, I thought it would be appropriate to tell the story of how I first became interested in purinergic receptors. I am recounting this story not because I believe that my audience has a burning interest in the history of my intellectual development, but rather because it illustrates the power of ideas.     

What is life?

Background

Many traditional biological concepts continue to be debated by biologists, scientists and philosophers of science. The specific objective of this brief reflection is to offer an alternative vision to the definition of life taking as a starting point the traits common to all living beings.

Results and Conclusions

Thus, I define life as a process that takes place in highly organized organic structures and is characterized by being preprogrammed, interactive, adaptative and evolutionary. If life is the process, living beings are the system in which this process takes place. I also wonder whether viruses can be considered living things or not. Taking as a starting point my definition of life and, of course, on what others have thought about it, I am in favor of considering viruses as living beings. I base this conclusion on the fact that viruses satisfy all the vital characteristics common to all living things and on the role they have played in the evolution of species. Finally, I argue that if there were life elsewhere in the universe, it would be very similar to what we know on this planet because the laws of physics and the composition of matter are universal and because of the principle of the inexorability of life.

     

Bryophyte Succession on the Wealden Sandstone Rocks

Abstract

Rhizoid gemmae (or tubers) are described and illustrated from twenty-nine species of European mosses. A majority of the species can be recognized from the appearance of their tubers. In many species, such as those which occur in arable fields, the tubers appear to be adapted primarily as a means of surviving unfavourable conditions, while in others, such as those occurring by streams, dispersal by water may also be an important function of the gemmae. Tuber-bearing mosses are often sterile and sporopbytes are unknown in several of them.

I am grateful to Dr E. Nyholm, Mrs J. A. Paton and Dr E. F. Warburg for the loan of specimens from which to start cultures. Mr A. C. Crundwell has given me invaluable help throughout the course of this study, not only in providing information and specimens but also for the interest he has shown, and I am much indebted to him.     

Inclusion: an individual pursuit requiring organization-level investment to sustain it

If this was not happening in the midst of the COVID-19 pandemic, I imagine that I would be speaking these words instead of writing them on my laptop. Even so, I am so jazzed for this opportunity! No word or phrase describes what I am feeling in this moment in receiving the 2021 American Society for Cell Biology Prize for Excellence in Inclusivity. It is certainly an honor to be recognized in this way. I am grateful to the Howard Hughes Medical Institute for awarding me additional resources to keep on keeping on. My approach to finding the connection between people and their science certainly could use the monetary support. Resources open doors. At the same time that I am grateful for the attention, I am not exactly sure what to do with the spotlight. Importantly, there are a host of other folks out there also doing amazing things who have never been recognized. Let’s work to ensure that their contributions are supported, appreciated, and recognized. Instead of focusing the spotlight on me, I would rather redirect it to recognize my foundational influences. I also hope to encourage the need for institutional approaches beyond celebrating individual accomplishment.

O. A. Quintero‐CarmonaJo Rae Wright was my graduate advisor and the model for how I have tried to work with my students and colleagues to support their opportunities while also “doing science.” I wanted to start graduate school as soon as I could after graduating college, so after letting the Cell and Molecular Biology Program at Duke University know that I was accepting their offer, I started thumbing through their program booklet looking for labs with interesting research projects (a web presence wasn’t even really a thing for departments in 1996). I worked alphabetically and contacted a handful of labs one at a time to see whether anyone was willing to take on an early-rotation student. It was an unusual request for the way that the program had operated previously, and Jo Rae was the only person to agree to it. I don’t remember exactly, but she said something like, “We accepted you into the program, so I would be happy to host your first rotation.” The sense that I got was that, within the limits of her time and resources, she was willing to become my mentor because I needed one. She trusted the admissions process, so why not bring an eager student into the lab. I spent the summer settling in to the life of a graduate student—sort of.At first, I was bad at graduate school. I am curious about all sorts of things, which means I am also easily pulled in too many directions. In that first year of school I spent way too much time simply visiting other students in my cohort to see what it was that they were up to each day. I cannot imagine how distracting I must have been to them and probably extremely irritating to their PIs as well. If you were in Cell Biology at Duke in 1996–97, I am sincerely grateful that you tolerated my shenanigans. Where others might have taken me to task, Jo Rae looked for opportunities to redirect my energies more productively. She and another professor, Dan Kiehart, guided me toward participating in the Physiology Course at the Marine Biological Laboratory, where I learned what I needed to do to be a scientist in a way that would not have been possible otherwise. While there, I saw PIs working with students chasing the joy of discovery, and it felt like it was purely for the sake of a deeper understanding of biology and preparing the next generation of scientists to do the same. Resources gave us the liberty to focus on scientific discovery with minimal concern for where would be the highest profile place to publish. Although I acknowledge that the summer course environments may not be the most representative of the daily life of a scientist at a home institution, such an opportunity left a mark—I wanted to come as close as I could to emulating that environment when I got back to Duke and (eventually) when I had the chance to run a research group and teach students.Along the way, Jo Rae made sure to include me and my fellow lab mates in all aspects of the science. At national meetings she included us at every step, introducing us to her contemporaries and putting us in spaces where we would rub elbows with luminaries in the field. When we were in those environments, she made sure that I felt like a junior colleague. I cannot recall ever feeling like a “trainee.” Back home at Duke, I had opportunities to do everything that a scientist might do in addition to “sciencing.” Sure, I would write papers, contribute to grants, and be part of her review of papers. I was also encouraged to mentor undergraduates, teach, advocate for federal funding at the time of the National Institutes of Health (NIH) doubling, and plan events for Duke’s summer undergraduate research program, if I so chose. Similarly, when I expressed an interest in focusing on science with undergraduates, she was 100% on board with finding ways to combine my graduate school commitments with teaching and mentoring opportunities. Importantly, at a time when expressing interest in an “alternative career” was not always supported by faculty mentors, Jo Rae encouraged me to seek out only those potential postdoctoral mentors who would actively support my goals. Not only that, she went out of her way to find out what options I might have, which led to her learning about the NIH-funded Institutional Research and Academic Career Development Award postdoctoral programs in their first year of existence.In a sentence, because Jo Rae was 100% invested in including me in science by finding the framework that best suited my interests and potential, I grew into my success. This was a form of success that wasn’t decided by someone else; I had defined it for myself with Jo Rae serving as a true advisor in every sense of the word—she was in it for me. She helped to build the crucial foundations that helped me find the opportunities that matched my goals. As a result of her influence, I have also had the strength to make some critical, nontraditional choices along the way. Her mentorship style was tailored to each individual’s needs. She invested the time to figure out our strengths, and also learned which levers would motivate us to meet our potential. The members of her lab became successes because she helped all of us to both define success and achieve our own version of it. Such a personal approach is extremely powerful. Jo Rae passed away in 2012, and with her passing I lost the most important influence in my professional life. Duke University and the pulmonary physiology community lost an example for inclusive mentorship and a significant amount of capacity for such an approach. Since her passing, multiple awards have been established to honor Jo Rae’s legacy as an outstanding woman in science. I would argue that mentoring of junior colleagues may be a more significant legacy than her scientific output. Jo Rae is deserving of this award.Recognitions such as this one are an important way to amplify examples of what we often say we hope to achieve as a department, an institution, or a scientific society. However, if our focus is solely on the efforts of individuals, we are missing an opportunity. While I am humbled to be considered in the same league as the previous award recipients, we are each in our own way scrambling to do what we can while we can do it. When individuals have some positive outcomes, our institutions and organizations will celebrate what these folks have done as they have played some role in supporting these opportunities. Although what we do is worthwhile, it is really hard to do it successfully and sustainably without proper institutional support. We each face hinderances that can undermine the work that we want to take on. Burnout is a real outcome of doing the work that we care about and that our organizations publicly state is important. This is especially true in environments where that work is undervalued and underresourced. You do not have to do a very extensive internet search to identify where the institutions that have supported my work also have exclusionary legacies and current negative influences that continue to hinder their potential for broader, more meaningful progress. In many instances inclusion has yet to be baked into institutional culture in a way that impacts how organizations operate. Although I have had some institutional support to develop a career modeled on what I experienced under Jo Rae’s mentorship, the students and faculty at these institutions know that what gets headlines can often be an exceptional situation, rather than a typical everyday experience. Rather than showcasing the good work of individuals in their ranks, an organization should devote itself to furthering the idea that it is willing to make significant institutional investments in that good work. By building the internal infrastructure and capacity to support inclusion efforts, organizations would demonstrate that inclusion is an essential component of the institutional standard practice. The positive outcomes that this award is intended to highlight would then be a shared characteristic of the community. A shared vision paired with shared effort and resource-support might cut down on burnout of those currently carrying more than their share of the load.I imagine that the idea for these awards is to celebrate good work while also demonstrating to other individuals what is possible. With that in mind, if institutions worked at using the example of those in the vanguard as a way to build structures that value and support inclusive approaches, they would increase their own ability to serve their constituents. They may also influence other institutions to do the same. My graduate institution benefited from Jo Rae’s work while she was present and was beginning to institutionalize her view of inclusion in the last years of her life. As Dean of the Graduate School, the model for how she ran her lab informed her vision for graduate education campus-wide. She wanted to build a structure that would identify, recruit, and retain talent. She wanted to provide that talent with opportunities to become expert in how they wanted to contribute to the world. By ensuring that they had access to the relevant experiences and skills, she hoped to support them as they set themselves up for success as they defined it.I accept this award in honor of Jo Rae Wright, and on behalf of the students who have trusted me. All I have ever wanted was to be able to recreate for my undergraduates what Jo Rae had done for the people under her wing. I am building a career around that goal as part of a department keenly supportive of these efforts. My hope is that other individuals will develop their own approaches to inclusion because they find themselves in supportive institutional environments. More importantly, I would like to see organizations begin to truly prioritize inclusive approaches through funding and through policy. Institutions could make sufficient resources available to support inclusive efforts and allow creativity in how faculty mobilize those resources. Just as Jo Rae had the flexibility to adjust to our needs, institutional efforts will benefit when limited resource access is not a hindrance to inclusive excellence. Additionally, it will be critical to acknowledge the time and effort that such endeavors require in evaluating faculty contributions. It can no longer be the icing on the cake of a portfolio—developing inclusive capacity has to be recognized as an essential component of our work. Until these changes take root at the institutional level, this kind of work may shine brightly, but will continue to be stochastic and short-lived. All those efforts “will be lost in time, like tears in rain.” It is on all of us to prevent such a tragic ending.     

The Sixth Liposome Research Days Conference “Liposomes: L'Avant Garde”

Abstract

The Journal of Liposome Research is a misleading name. It implies that our chief concern should be liposomes, which most people understand to be single or multilamellar vesicles. Such a single-minded focus would not only be boring, it would fail to describe the breadth of the field or the preoccupations of most of the practitioners. A more accurate title for what most readers expect from this journal might be Journal of Lipid-Based Delivery Systems, which would also cover, for example, lipid systems for delivering DNA into cells, polymer-lipid delivery vehicles, lipid-based emulsion systems, etc. Although this title might be more accurate, I, for one, would find it disappointing because it implies that our sole concern is how lipids could be used as delivery systems in the pharmaceutical industry. My preferred title–though I doubt that the Editor would stand for it– would be the Journal of Lipid-Based Delivery Systems and All the Other Research Related to Lipids That Any Scientist with a Healthy Curiosity Ought to Find Interesting. A bit awkward perhaps, but at least it conveys a sense, not of where we are, but where many us feel we should be.     

Sensitivity and Validity of Psychometric Tests for Assessing Driving Impairment: Effects of Sleep Deprivation

ObjectiveTo assess drug induced driving impairment, initial screening is needed. However, no consensus has been reached about which initial screening tools have to be used. The present study aims to determine the ability of a battery of psychometric tests to detect performance impairing effects of clinically relevant levels of drowsiness as induced by one night of sleep deprivation.MethodsTwenty four healthy volunteers participated in a 2-period crossover study in which the highway driving test was conducted twice: once after normal sleep and once after one night of sleep deprivation. The psychometric tests were conducted on 4 occasions: once after normal sleep (at 11 am) and three times during a single night of sleep deprivation (at 1 am, 5 am, and 11 am).ResultsOn-the-road driving performance was significantly impaired after sleep deprivation, as measured by an increase in Standard Deviation of Lateral Position (SDLP) of 3.1 cm compared to performance after a normal night of sleep. At 5 am, performance in most psychometric tests showed significant impairment. As expected, largest effect sizes were found on performance in the Psychomotor Vigilance Test (PVT). Large effects sizes were also found in the Divided Attention Test (DAT), the Attention Network Test (ANT), and the test for Useful Field of View (UFOV) at 5 and 11 am during sleep deprivation. Effects of sleep deprivation on SDLP correlated significantly with performance changes in the PVT and the DAT, but not with performance changes in the UFOV.ConclusionFrom the psychometric tests used in this study, the PVT and DAT seem most promising for initial evaluation of drug impairment based on sensitivity and correlations with driving impairment. Further studies are needed to assess the sensitivity and validity of these psychometric tests after benchmark sedative drug use.     

A year since George Floyd

The murder of George Floyd sparked an awakening, long overdue, which reverberated throughout society. As science begins to acknowledge its role in perpetuating systematic racism, the voices of Black scientists, which have largely been absent, are now being called on. As we rightly begin to make space for diverse voices and perspectives in science, we all must think about what it is we are asking minoritized individuals to do.

It has been roughly 1 year since the murder of George Floyd, an unarmed Black man, who was killed over an alleged counterfeit 20 dollar bill in Minneapolis, Minnesota (Hill et al. 2020; Kaul, 2020; Levenson, 2021). In many ways, his murder was no different than the murders of thousands of other murders of Black people in this country (Thompson, 2020; Lett et al., 2021; Tate et al., 2021). However, what distinguishes George Floyd’s murder from many other high profile cases is that it was unambiguously captured on video (Alexander, 1994), an act of bravery by Darnella Frazier, a 17-year-old Black woman (Izadi, 2021), at a time when the world was mostly housebound by a raging global pandemic. As a result, his murder reverberated through society in a way that has not happened in my lifetime. While there have been other high profile cases of murders carried out by police (Treyvon Martin, Walter Scott, Breonna Taylor, and Philando Castile, among many others), these cases failed to fully sustain the attention of a national and international audience (Chan et al., 2020; Chughtai, 2021). The murder of George Floyd was fundamentally different, and for once, more than just Black people were paying attention. His murder sparked protests across the nation led by the Black Lives Matter (BLM) movement (Day, 2015; Taylor, 2016; Banks, 2018; Taylor, 2021), and the demands for change were so loud people could not help but hear.As a Black, gay man who is also a scientist, I was thrown into despair. All of my life I have thought if I just worked hard enough, if I am kind and unthreatening, if I play the game and keep my head down, maybe I can make it in academia. Maybe then I will be seen and accepted, not just by society, but by the scientific community. George Floyd’s murder reminded me, and many of my Black colleagues, that our degrees can’t protect us, that our privileged middle-class upbringing (if we had one) was not a shield. Our lives were not worth more than a counterfeit 20 dollar bill.Science, which has always been a product of society, was not impervious to these reverberations. By late June my inbox began to slowly fill with invitations to speak at several institutions for their seminar series, retreats, or special symposia. It felt as if the scientific community, for the first time, realized that there were Black scientists among them. In the throes of my own despair, and the feeling that I needed to be doing something for my community, I began to say “yes.” I was not going to participate in the nightly protests that occurred in my newly adopted hometown of Portland, Oregon. Aside from fearing I could be next to lose my life at the hands of the police (Edwards et al., 2019), these protests were happening in the backdrop of a global pandemic. I came to the conclusion that by accepting these invitations to speak, this could be my activism, my way of sparking change, increasing visibility, and being seen not only for my own sake but also for other Black scientists.Before I write anything else, I want to be clear: I am extremely thankful to all the institutions and organizations that invited me and gave me a platform. I am extremely proud of my students’ work and of the research we produce. I am sharing my experiences with the hope that they can be instructive to the greater scientific community, but if I am being frank, there is a bit of anger.I received over 15 invitations and gave an additional three or four interviews over the course of the year. Most of these came with the expectation that I would also talk about my work in Diversity, Equity, and Inclusion. But here’s the lowdown: prior to this year, I did not view myself as someone who did Diversity, Equity, and Inclusion work. I am co-chair of the LGBTQ+ committee of the American Society of Cell Biology and a member of the Diversity, Equity, and Inclusion committee of the Genetics Society of America. I volunteer for both of these committees because they speak to something I care deeply about, the advocacy for minoritized ¹ scientists. I also embody both of these axes of diversity; so, in some way, I am only looking out for myself. This is far from being a scholar or doing “Diversity work.” I fully recognize that there are individuals who have dedicated their lives to this type of work with entire academic fields populated with accomplished scholars. So, I started this year of talks being invited because I am a Black, gay scientist at a time when science was grappling with its own systematic racism, under the guise of my nonexistent Diversity, Equity, and Inclusion work.What has this year actually taught me? The first thing it taught me is that I have been missing out. Prior to George Floyd’s murder, I had only received three seminar invitations from major research institutions and unfortunately all within a year of being posttenure. That is after nearly 6 years in my current position.In giving these talks I got the opportunity to meet with some of the giants in my field, people I have looked up to for years. I received reagents, offers to collaborate, and a litany of great ideas that will help drive my research program for years to come. I left some of these meetings truly inspired and excited to start experiments. These opportunities would have been invaluable to me, pretenure. One could argue, I did not need it. I made it even without this networking and the advantages these visits bring. Before you applaud my ability to persist and be resilient, we should take a deep look at the systems that have forced people who look like me to be doubly resilient. If George Floyd had not been murdered, would any of these invitations have happened? If the previous 6 years are any indication of a trend, I would have to say most certainly not. Why did it take a murder and the reignition of a Civil Rights movement for me to have the type of interactions I now know many of my straight, white counterparts have had from the very beginning of their independent careers? Let me be clear: this is a form of systematic racism, plain and simple.As I began to make the rounds, I was often asked to either share a bit of my journey or include my Diversity, Equity, and Inclusion work in my talks. This sometimes came at the expense of sharing my lab’s work. While I was very happy to do so, this was very much implicit in the invitations I received. At times it did feel that my inclusion was only checking a box, placating the graduate students so that they could see that their department or institution was responding to their demands. This also had the consequence of making me feel as though my science was merely performative. I was being invited to do the Diversity work institutions did not want to do. This is the tension I, and many other minoritized scientists, face. I want to share my experiences with the hopes that the next generation will have it better; but, my scholarly work is not in Diversity, Equity, and Inclusion. I fully recognize that it is my embodied diversity that is bringing me to the table; but, it is the science I want to share.On the first invitation to give a seminar, I promised myself that I was going to be honest. This meant that I would tell the truth about my experience and bare my soul over and over again. What I had not counted on was the emotional toll this would take on me. Reliving my own trauma, on a regular basis, left me emotionally drained after these visits. In one of my “stops” (I use quotes here because these “visits” were all virtual), I met with the queer, person of color (POC), graduate students. This session quickly turned into an emotional support group where I heard stories of mistreatment, racism, and discrimination. It was nearly impossible to maintain my composure. Diversity, Equity, and Inclusion work is clearly extremely important, but, maybe, we could just start by listening to the needs of the students and having a bit of humanity.The trial of Derek Chauvin has come and passed, and much to my surprise, and to the surprise of many other Black people nationwide, he was found guilty and was sentenced to prison (Arango, 2021; Cooper and Fiegel, 2021). This, of course, is not justice, not even close. Justice would mean that George Floyd is still alive and would get to live out his life in the way he chose. We are also at the beginning of the end of the pandemic. In 6 months or less, we may all be returning to life, more or less, as it was before George Floyd, before COVID-19. Does this mean we stop fighting? Does this mean that I, and many other Black scientists, suddenly disappear? For George Floyd, for countless other faceless Black people before him, I sincerely hope not. We need to continue to give Black scientists a platform. We need to ensure that they, too, are given the opportunity to network, collaborate, and interact with the larger scientific community. This means the invitations cannot stop. To further this, we need to ensure that Black scientists are included in every grant review panel, are included on speaker lists at every national and international meeting, are funded, and are in the room where funding, tenure, and other critical decisions are being made. We need to recognize that systematic racism has not gone away with Derek Chauvin’s conviction and sentencing. We need to continue to push forward. And, for all of you young, minoritized scientists (and allies) reading this, demand change and do not take "no" for an answer. I am truly sorry this has fallen on your shoulders, but enough is enough. The next generation of minoritized scientists should be recognized for their science without the additional burden of creating their own space.About the AuthorI am currently an Associate Professor of Biology at Reed College (https://www.reed.edu/biology/applewhite/index.html), which is located in Portland, Oregon. I arrived at Reed in 2014; prior to that, I was a postdoctoral fellow at the University of North Carolina, Chapel Hill. I received my PhD from Northwestern University in Cellular and Molecular Biology and a BS in Biology from the University of Michigan where I was also a 4-year letter winner in track and field. My research focuses on the cytoskeleton where I study cell motility and morphogenesis using Drosophila and Drosophila derived in tissue culture cells to explore actin, microtubules, and molecular motors. My current lab is composed of fierce, determined undergraduate students. I am a member of the American Society of Cell Biology (ASCB) and the current chair of the LGBTQ+ Committee (https://www.ascb.org/committee/lgbtq/). I am also a member of the Diversity, Equity, and Inclusion Committee for the Genetics Society of America (https://genetics-gsa.org/committees/). I also serve as an editor for MBoC’s Voices series.     

A reagent forum

My lab works with the yeast Saccharomyces cerevisiae, but I frequently get asked questions regarding autophagy reagents for use in higher eukaryotic systems. For example, "Which anti-LC3 antiserum works well in HEK293 cells"? Occasionally I know the answer, or an answer, but not always. Sometimes the information is available in the literature, but it can be difficult to find. With the ever-growing community of autophagy researchers, however, I suspect that many more reagents have been tested, and in many cases not reported. Therefore, I think it would be useful to establish a list of reagents (in particular, antisera and inhibitors) with company-specific information (name and catalog number) that can save other researchers valuable time and money. Autophagy will post the information in the form of a WIKI to allow updates and comments from users.

For example:

Reagent: anti-LC3

Company: Count On Us

Catalog number: 01234

Comments:

Dan Klionsky: I used this antibody and had a very good result (good sensitivity with low background) on protein extracts from mouse.

Danny Klionsky: I also had a good result with this antibody, and found that a higher dilution (1:3,000) worked just as well with rat liver protein extract.

Daniel J. Klionsky: This antibody did not work for yeast Atg8.

We plan to start the WIKI in August 2008, but its success depends entirely on your participation. Please check for the start of this site, and upload your entries. I am open to suggestions for improvements of the site that will make it more useful for autophagy researchers.

http://www.landesbioscience.com/reagent_blog/     

Some Notes on David Nicholson's Contributions to Modelling Adsorption

Abstract

During his career David has built up a very large number of scientific contacts throughout the world. Many of these became friends and collaborators. Imperial College was, of course, a good place to start from: R.M. Barrer was from New Zealand and John Petropoulos from Greece. Subsequently, he collaborated with scientists from other European Union countries, especially from France and Germany as well as more researchers from Greece. He also made many contacts in the US. A very important example was the sabbatical he had with W.A. Steele at Penn State, where he made his first big incursion into intermolecular forces. He also had very useful exchanges of visits with K.E. Gubbins, which led to joint work. More recently he developed working relationships with scientists from Japan and from South Korea. The scientific value of these contacts may be gauged from the large number of his publications, which involve researchers from these countries as co-authors. However, I am sure the readiness with which overseas researchers participated was in part also due to the friendly and helpful manner with which David received them here.     

Benedicte Wrensted: An Idaho Photographer of Indians

This project resurrects a Pocatello woman who had become merely a shadow in the historical record. Through the study of images, archives, newspapers and published sources, I am attempting to bring back into view the work of this remarkable photographer, Benedicte Wrensted [figure 1].     

A Passion for Parasites

I knew nothing and had thought nothing about parasites until 1971. In fact, if you had asked me before then, I might have commented that parasites were rather disgusting. I had been at the Johns Hopkins School of Medicine for three years, and I was on the lookout for a new project. In 1971, I came across a paper in the Journal of Molecular Biology by Larry Simpson, a classmate of mine in graduate school. Larry''s paper described a remarkable DNA structure known as kinetoplast DNA (kDNA), isolated from a parasite. kDNA, the mitochondrial genome of trypanosomatids, is a DNA network composed of several thousand interlocked DNA rings. Almost nothing was known about it. I was looking for a project on DNA replication, and I wanted it to be both challenging and important. I had no doubt that working with kDNA would be a challenge, as I would be exploring uncharted territory. I was also sure that the project would be important when I learned that parasites with kDNA threaten huge populations in underdeveloped tropical countries. Looking again at Larry''s paper, I found the electron micrographs of the kDNA networks to be rather beautiful. I decided to take a chance on kDNA. Little did I know then that I would devote the next forty years of my life to studying kDNA replication.     

The gamification of elementary school biology: a case study on increasing understanding of plants

ABSTRACT

This study presents a new technique, the “Which plant am I?” game, which helps to increase pupils’ plant knowledge, while motivate them to become familiar with more plants. On the other hand pupils’ plant knowledge was tested in Serbia.

The “Which Plant Am I?“ game was tested with two groups of pupils (in average 11 years old). Pupils in the experimental group took part in outdoor classes and played the ”Which plant am I?” game. Pupils of the control group observed plants only in the classroom. This technique can deliver significant improvement in pupils’ knowledge about plants and motivate them through an active and playful learning process. This technique can be one possible solution of plant blindness.     

Amphotericin B Lipid Complex (Ablc™): A Molecular Rationale for the Attenuation of Amphotericin B Related Toxicities

Abstract

When the idea of putting together a Forum on the subject of polymer and glycan coated liposomes came across my mind, I thought that this would be an unique opportunity for those of us who argue fiercefully in meetings to do the same in writing. The idea was well received when I contacted my colleagues about a year ago. After some minor arm-twisting by phone and FAX, here is the first Forum published in JLR.     

Driver sleepiness and risk of serious injury to car occupants: population based case control study

ObjectivesTo estimate the contribution of driver sleepiness to the causes of car crash injuries.DesignPopulation based case control study.SettingAuckland region of New Zealand, April 1998 to July 1999.Participants571 car drivers involved in crashes where at least one occupant was admitted to hospital or killed (“injury crash”); 588 car drivers recruited while driving on public roads (controls), representative of all time spent driving in the study region during the study period.ResultsThere was a strong association between measures of acute sleepiness and the risk of an injury crash. After adjustment for major confounders significantly increased risk was associated with drivers who identified themselves as sleepy (Stanford sleepiness score 4-7 v 1-3; odds ratio 8.2, 95% confidence interval 3.4 to 19.7); with drivers who reported five hours or less of sleep in the previous 24 hours compared with more than five hours (2.7, 1.4 to 5.4); and with driving between 2 am and 5 am compared with other times of day (5.6, 1.4 to 22.7). No increase in risk was associated with measures of chronic sleepiness. The population attributable risk for driving with one or more of the acute sleepiness risk factors was 19% (15% to 25%).ConclusionsAcute sleepiness in car drivers significantly increases the risk of a crash in which a car occupant is injured or killed. Reductions in road traffic injuries may be achieved if fewer people drive when they are sleepy or have been deprived of sleep or drive between 2 am and 5 am.

What is already known on this topic

Driver sleepiness is considered a potentially important risk factor for car crashes and related injuries but the association has not been reliably quantifiedPublished estimates of the proportion of car crashes attributable to driver sleepiness vary from about 3% to 30%

What this study adds

Driving while feeling sleepy, driving after five hours or less of sleep, and driving between 2 am and 5 am were associated with a substantial increase in the risk of a car crash resulting in serious injury or deathReduction in the prevalence of these three behaviours may reduce the incidence of injury crashes by up to 19%     

After 2 years of a pandemic,students are struggling to find strong reference letters

Writing and receiving reference letters in the time of COVID. Subject Categories: Careers

“People influence people. Nothing influences people more than a recommendation from a trusted friend. A trusted referral influences people more than the best broadcast message.” —Mark Zuckerberg.

I regularly teach undergraduate courses in genetics and genomics. Sure enough, at the end of each semester, after the final marks have been submitted, my inbox is bombarded with reference letter requests. “Dear Dr. Smith, I was a student in your Advanced Genetics course this past term and would be forever grateful if you would write me a reference for medical school…” I understand how hard it can be to find references, but I have a general rule that I will only write letters of support for individuals that I have interacted with face‐to‐face on at least a few occasions. This could include, for example, research volunteers in my laboratory, honors thesis students that I have supervised, and students who have gone out of their way to attend office hours and/or been regularly engaged in class discussions. I am selective about who I will write references for, not because I am unkind or lazy, but because I know from experience that a strong letter should include concrete examples of my professional interactions with the individual and should speak to their character and their academic abilities. In today''s highly competitive educational system, a letter that merely states that a student did well on the midterm and final exams will not suffice to get into medical or graduate school.However, over the past 2 years many, if not most, students have been attending university remotely with little opportunity to foster meaningful relationships with their instructors, peers, and mentors, especially for those in programs with large enrollments. Indeed, during the peak of Covid‐19, I stopped taking on undergraduate volunteers and greatly reduced the number of honors students in my laboratory. Similarly, my undergraduate lectures have been predominantly delivered online via Zoom, meaning I did not see or speak with most of the students in my courses. It did not help that nearly all of them kept their cameras and microphones turned off and rarely attended online office hours. Consequently, students are desperately struggling to identify individuals who can write them strong letters of reference. In fact, this past spring, I have had more requests for reference letters than ever before, and the same is true for many of my colleagues. Some of the emails I have received have been heartfelt and underscore how taxing the pandemic has been on young adults. With permission, I have included an excerpt from a message I received in early May:Hi Dr. Smith. You may not remember me, but I was in Genome Evolution this year. I enjoyed the class despite being absent for most of your live Zoom lectures because of the poor internet connection where I live. Believe it or not, my mark from your course was the highest of all my classes this term! Last summer, I moved back home to rural Northern Ontario to be closer to my family. My mom is a frontline worker and so I''ve been helping care for my elderly grandmother who has dementia as well as working part‐time as a tutor at the local high school to help pay tuition. All of this means that I''ve not paid as much attention to my studies as I should have. I''m hoping to go to graduate school this coming fall, but I have yet to find a professor who will write a reference for me. Would you please, please consider writing me a letter?I am sympathetic to the challenges students faced and continue to face during Covid‐19 and, therefore, I have gone out of my way to provide as many as I can with letters of support. But, it is no easy feat writing a good reference for someone you only know via an empty Zoom box and a few online assignments. My strategy has been to focus on their scholarly achievements in my courses, providing clear, tangible examples from examinations and essays, and to highlight the notable aspects of their CVs. I also make a point to stress how hard online learning can be for students (and instructors), reiterating some of the themes touched upon above. This may sound unethical to some readers but, in certain circumstances, I have allowed students to draft their own reference letters, which I can then vet, edit, and rewrite as I see fit.But it is not just undergraduates. After months and months of lockdowns and social distancing, many graduate students, postdocs, and professors are also struggling to find suitable references. In April, I submitted my application for promotion to Full Professor, which included the names of 20 potential reviewers. Normally, I would have selected at least some of these names from individuals I met at recent conferences and invited to university seminars, except I have not been to a conference in over 30 months. Moreover, all my recent invited talks have been on Zoom and did not include any one‐on‐one meetings with faculty or students. Thus, I had to include the names of scientists that I met over 3 years ago, hoping that my research made a lasting impression on them. I have heard similar anecdotes from many of my peers both at home and at other universities. Given all of this, I would encourage academics to be more forthcoming than they may have traditionally been when students or colleagues approach them for letters of support. Moreover, I think we could all be a little more forgiving and understanding when assessing our students and peers, be it for admissions into graduate school, promotion, or grant evaluations.Although it seems like life on university campuses is returning to a certain degree of normality, many scholars are still learning and working remotely, and who knows what the future may hold with regard to lockdowns. With this uncertainty, we need to do all we can to engage with and have constructive and enduring relationships with our university communities. For undergraduate and graduate students, this could mean regularly attending online office hours, even if it is only to introduce yourself, as well as actively participating in class discussions, whether they are in‐person, over Zoom, or on digital message boards. Also, do not disregard the potential and possibilities of remote volunteer research positions, especially those related to bioinformatics. Nearly, every laboratory in my department has some aspect of their research that can be carried out from a laptop computer with an Internet connection. Although not necessarily as enticing as working at the bench or in the field, computer‐based projects can be rewarding and an excellent path to a reference letter.If you are actively soliciting references, try and make it as easy as possible on your potential letter writers. Clearly and succinctly outline why you want this person to be a reference, what the letter writing/application process entails, and the deadline. Think months ahead, giving your references ample time to complete the letter, and do not be shy about sending gentle reminders. It is great to attach a CV, but also briefly highlight your most significant achievements in bullet points in your email (e.g., Dean''s Honours List 2021–22). This will save time for your references as they will not have to sift through many pages of a CV. No matter the eventual result of the application or award, be sure to follow up with your letter writers. There is nothing worse than spending time crafting a quality support letter and never learning the ultimate outcome of that effort. And, do not be embarrassed if you are unsuccessful and need to reach out again for another round of references—as Winston Churchill said, “Success is stumbling from failure to failure with no loss of enthusiasm.”     

Aquaporin Water Channels

Thank you very much. I am humbled, I am delighted; I am honored. This is every scientist’s dream: to give the Nobel Lecture in Stockholm. But I would not be honest if I did not tell you that I am having a little anxiety being on this platform. I have lectured a number of times in Sweden, and I thought I would share with you some events preceding a special lecture that I gave here a few years ago. Arriving at Arlanda Airport, I waited in line at the Pass Control behind a group of businessmen in suits with briefcases. I heard the first in line asked by the control officer to state the purpose of his visit to Sweden. When the man replied “business,” the officer approved and stamped his passport. One at a time, each stepped forward and was asked the same thing; each answered “business” and was approved. Eventually it was my turn, and I was dressed in rumpled clothes after spending the night in the Economy Minus section of an SAS jetliner. The officer asked me the purpose of my visit, and I said “I am here to give the von Euler Lecture at Karolinska Institute.” The officer immediately looked up, stared at me, and asked, “Are you nervous?” At that point I became intensely nervous and said “Yes, I am a little nervous.” The officer looked up again and stated “Well, you should be!“ So if the lecturers look a little nervous, the problem is at Arlanda.     

Finding your unique path in science

I always found it curious that in science, we value unique, creative thinkers, but we teach scientists to progress in a formulaic manner that rarely takes each person’s individual strengths into account. Surprisingly, when we break the mold, we are often rewarded for it. This cycle of learning to survive using conventional wisdom but being rewarded for a unique path outside of it seems to be an unspoken key to success. I am honored to be awarded the 2020 Women in Cell Biology Junior Award for Excellence in Research and am thrilled to share some of the unconventional guiding principles that brought me to where I am in this rich scientific landscape. The game changers in the early phase of my career were informal mentors, open scientific communication, and persistence in pursuing difficult scientific questions.

Prachee Avasthi     

After the year of the dumpster fire

2020 has been one of the craziest and strangest years we have lived through. Now that it’s over, it’s an opportunity to show gratitude for all the good things. Subject Categories: S&S: History & Philosophy of Science

I moved to New York City the year of the attacks on September 11, 2001, one of the bleakest moments in the history of the United States. I was also in New York City when Superstorm Sandy hit in 2012. Luckily, much fewer people died due to the storm, but it was incredibly disruptive to many scientists in the affected area—my laboratory had to move four times over a period of 6 years in the storm’s aftermath. These were awful, tragic events, but 2020 may go down in the record books as one of the most stressful and crazy years in modern times. Not to be outdone, 2021 has started terribly as well with COVID‐19 still ravaging the world and an attack on the US Capitol, something I thought I’d never see in my lifetime. The unnecessary deaths and the damage to America’s “House of the People” were heartbreaking.While these events were surely awful, nothing will be as crushing as the deaths of family members, close friends, and the children of friends; perhaps, it is these experiences—and the death of a beloved dog—that prepared me for this year and made me grateful, maybe even more than usual, for what I have. But in the age of a pandemic, what am I particularly grateful for?I''m ridiculously grateful to have a job, a roof over my head, and food security. The older I get, the more I see illness and injury affect my colleagues, family, and friends, I increasingly appreciate my good health. I am grateful for Zoom (no, I have no investment in Zoom)—not for the innumerable seminars or meetings I have attended, but for the happy hours that helped to keep me sane during the lockdown. Some of these were with my laboratory, others with friends or colleagues, sometimes spread over nine time zones. Speaking of which, I’m also grateful for getting a more powerful router for the home office.I''m immeasurably grateful to be a scientist, as it allows me to satisfy my curiosity. While not a year‐round activity, it is immensely gratifying to be able to go to my laboratory, set up experiments, and watch the results coming in. Teaching and learning from students is an incredible privilege and educating the next generation of scientists how to set up a PCR or run a protein gel can, as a well‐known lifestyle guru might say, spark serious joy. For this reason, I’m eternally grateful to my trainees; their endless curiosity, persistence, and energy makes showing up to the laboratory a pleasure. My dear friend Randy Hampton recently told me he received a student evaluation, thanking him for telling his virtually taught class that the opportunity to educate and to be educated is something worth being grateful for, a sentiment I passed onto a group of students I taught this past fall. I believe they, too, were grateful.While all of the above things focus on my own life, there are much broader things. For one, I am so grateful to all of those around the globe who wear masks and keep their distance and thereby keep themselves and others safe. I am grateful for the election of an American president who proudly wears a mask—often quite stylishly with his trademark Ray‐Ban Aviators—and has made fighting the COVID‐19 pandemic his top priority. President Biden''s decision to ramp up vaccine production and distribution, along with his federal mask mandate, will save lives, hopefully not just in the United States but worldwide.This Gen‐X‐er is also especially grateful to the citizens of Generations Y and Z around the world for fighting for social justice; I am hopeful that the Black Lives Matter movement has got traction and that we may finally see real change in how communities of color are treated. I have been heartened to see that in my adopted home state of New York, our local politicians ensure that communities that have been historically underserved are prioritized for COVID‐19 testing and vaccinations. Along these lines, I am also incredibly encouraged by the election of the first woman who also happens to be of African and Asian heritage to the office of vice president. Times are a changin''...While it is difficult to choose one, top thing to be grateful for, I would personally go for science. I am stoked that, faced with a global crisis, science came to the rescue, as it often has in the past. If I had to find a silver lining in COVID‐19—albeit it would be for the darkest of clouds—I am grateful for all of our colleagues, who despite their usual arguing, quickly and effectively developed tests, provided advice, epidemiological data and a better understanding of the virus and its mode of infection, and ultimately developed therapies and vaccines to save lives. The same can be said for the biotech and pharmaceutical industry that, notwithstanding its often‐noted faults, has been instrumental in developing, testing and mass‐producing efficient and safe vaccines in blistering, record time. Needless to say, I have also much gratitude to all of the scientists and regulators at the FDA and elsewhere who work hard to make life as we once knew it come back to us, hopefully in the near future.Once again, thank you for everything, Science.     

Pedagogy of the Black academic

I am just starting my career as a cancer biologist, but I have always been a Black man in America. This means that I have always inhabited a world that generally disregarded my existence in some form or another. It is June 17th, 2020 and protests have been happening for weeks since the killing of George Floyd in Minneapolis. The current state of America may be uneasy for some, but for many Americans, the looming threat of exclusion and violence has been an unwelcome companion since birth. This letter is not about a single person, but the Black academic’s experience of race inside and outside of the academy during a time of social upheaval. I have trained in a variety of institutions, big and small, and all the while acutely aware of the impact of my Blackness on my science. The intent of the following is to provoke the reader to reflect on how we as a nation can move toward radically positive change and not incremental adjustments to the status quo. The views expressed are my own and are the result of years of personal experience observing the anti-Black standard in America.

About the AuthorI am currently a cancer biologist at the University of Minnesota Medical School. My lab works to eliminate cancer health disparities in African Heritage communities and investigates the roles of lipids in modifying the immune response in tumors. This is what I do, but not all of who I am. I am also the eldest child of a mother, who managed to convince me that she had eyes in the back of her head (thank you, Mom; it kept me honest). I am a big brother, a husband, and a father. I also consider myself a fortunate Black man in America. I grew up in places where many of my friends did not live to adulthood. If they managed to survive past adolescence, it was usually their dreams that died prematurely. I was lucky to have survived and to continue chasing my dream of becoming a scientist. I never considered myself the fastest, strongest, or even smartest kid growing up, but I was the most determined. Determined, despite the lack of access to role models in science that looked like me or shared my life experience. Now my mission is to increase the number of dreams achieved and impact as many young minds as my time on this planet permits.As a Black scientist, I sometimes have to remind myself that I have never been immune to racism. Because as you spend thousands of hours delving into the microscopic world, the macroworld starts to fade into the background like white noise. And if you get good at it, you almost forget about the strange looks, the excessive questioning, or even the obligatory “tailing” in stores, on campus, or at home. But it is strange to realize how much you have grown accustomed to discrimination and the fact that you unconsciously prepare for it daily, before it ever shows its ugly head, like a prize fighter training months before a fight.This past month, amid the Coronavirus Disease 2019 (COVID-19) pandemic, the rest of the world has decided to say police are bad, and oh, by the way, Black lives matter too—as if the oppression of Black bodies was new, or as though the recent string of names added to the ever-growing list of innocent Black Americans killed by authorities is an atypical occurrence. Well sadly it is not, and it never has been in this country or any other place with colonial origins. That is the truth, and there is no other way to state it. America is a country built on and driven by racist ideology.So, as a Black American in an “essential” worker role (I am now working on COVID–19-related research), I have physically been at work daily during the pandemic, as the spirit of solidarity sweeps the globe. As much as I want to say this is progress, I find myself asking “why now, and not then?” Why didn’t this happen when Trayvon Martin was murdered; why didn’t this happen when Rodney King was beaten (Alvarez and Buckley, 2013; Mullen and Skitka, 2006)? Is it a sign of the end times, or is it just that racism/White supremacy has finally run its course?I have a theory about why we are now seeing a mass movement against discrimination and police brutality (a.k.a. state-sanctioned murder). My theory states that had it not been for COVID-19 and the nationwide shutdown of normal life, none of this protesting would even be feasible. Why do you ask? The simple answer is that some people with the financial means can normally find ways to distract themselves with various activities, some noble and some … not so much, whereas other folks are less able to disconnect from the drudgery of hand-to-mouth living. Leave it to a global health crisis to reprioritize everyone’s entire life in one fell swoop. Suddenly, people who had vacation plans are stuck at home, whereas people who were just making ends meet are now unable to make those ends meet anymore. The haves and the have-nots are now both in an altered reality. Does this make them equal now? No, but it does allow people to see who their real friends, allies, and enemies are. I suspect that it’s the pulling back of the curtain that has made many people ready to fight, not to mention it is also very likely that many folks, after experiencing weeks of cabin fever, just needed some way to let off all that pent-up energy.Before COVID-19 became a full-time concern, tensions in the United States were already high as the recent killings of unarmed Black Americans (Breonna Taylor and Ahmaud Arbery) had gone viral and cries for justice echoed from coast to coast (Lovan, 2020). Once the reality of the pandemic set in and shelter-in-place orders were issued nationally, the situation became a powder keg waiting for just the right moment. That moment happened in North Minneapolis on May 25, 2020. With the release of the video showing the killing of George Floyd, the entire country and much of the world had a reason to go on a “righteous rampage” that has seemed to get the results some thought impossible to achieve. It cannot be overstated how critical social media has been in displaying the oppression of Black Americans at the hands of authorities to the entire world.Now, several months into the protests, the possibility of a “new’’ new normal has people dreaming of singing Kumbaya in technicolor. Yet, as one of the few Black faculty on my campus, I still feel like people are watching me, but for a different reason now. As various reforms are broadcast across the university, the random wellness “check-ins” start creeping in, and the requests for feedback on “new initiatives’’ seem to be like a new flavor of spam in my inbox.Now, I do appreciate the fact that people are starting to notice the oppressive nature of not being White in today’s world (in particular being Black in America), but I have been doing this for a while now, and I am not sure if hashtagged initiatives are healthy for anyone. Plus, it’s kind of creepy watching all of these people jump on the social justice bandwagon, when they weren’t here 4 mo ago or 4 years ago. For many Black academics, it is not about being involved with something when it’s trending; it’s about being “about that life” when it is inconvenient as hell. Again, I do appreciate the fact that more people are willing to fight oppression, racism, and White supremacy (even if only digitally), but you will have to forgive me if I do not trust you just yet. I mean, you are just checking in during what could be the last leg of a marathon, and we’ve been running this whole damn time!Here is a short answer to every wellness check-in email that many of the Black academics I know have received in the last 2 mo: “we were never okay in the first place, but thanks for FINALLY asking!” We don’t need any more bias training, hashtags, or email check-ins. It was a nice start, but it too has become a part of the status quo. The work now and always has been the eradication of underrepresentation, hurtful socialization, and ridiculously skewed power dynamics, not just the awareness of the fact. I don’t have all the answers, but if real change is desired, I think we can first start by teaching history accurately to EVERYONE, no more whitewashing the reality of America’s story and ignoring the contributions of Black academics (and Black Americans in general). Second, stop being silent when you see or hear racism at work or home. If you do nothing when racism shows up, you ARE a racist! Third, the privileged class must relinquish their “privilege” once and for all. That means the powers that were inherited based on historical (and present day) theft and oppression have to dissipate, with the ultimate goal of power sharing. The country club atmosphere of academia and the “fit culture” must erode in favor of true meritocracy. The best person for the job and not “the person who won’t make me uncomfortable by making me see my own deeply held prejudices and fears.”Honestly, Black academics SHOULD not be charged with the task of fixing broken systems, along with protecting themselves and mentees, while working toward tenure. But if we (Black academics) are not driving the car, progress will likely go the wrong way again (getting rid of Uncle Ben and Aunt Jemima does not correct the underlying pathology). Paulo Freire’s Pedagogy of the Oppressed speaks to this in saying, “the violence of the oppressors prevents the oppressed from being fully human, the response of the latter to this violence is grounded in the desire to pursue the right to be human … the oppressed, fighting to be human, take away the oppressors’ power to dominate and suppress, they restore to the oppressors the humanity they had lost in the exercise of oppression.” (Friere, 1972, p. 56). This means that if we (Black academics) want to be treated as humans and as scholars, we must show you what that humanity looks like FIRST. Now the question is, are you willing to learn or are you going to co-opt this moment, this movement to make it into something that fits your preconceived notion of the acceptable levels of Blackness in the academy?