美国国家植物基因组计划资助情况分析

美国植物基因组计划（National Plant Genome Initiative,NPGI）于1998年正式启动,该计划在美国国家科学基金会（NSF）的支持下,成立了由美国农业部（USDA）、能源部（DOE）、国立卫生研究院（NIH）、国家科学基金会（NSF）、科学与技术政策办公室（OSTP）、管理与预算办公室（OMB）和美国国际开发署（USAID）等组成的植物基因组跨机构工作组（Interagency Working Group on Plant Genomes,IWG）,IWG每5年制定一项5年计划来指导协调基因组研究工作。对1998～2009年期间,美国国家科学基金会（NSF）资助国家植物基因组计划（NPGI）的目标、经费、项目变化情况进行了分析,以期得到某些启示和借鉴。     

Martin Gibbs and the peaceful uses of nuclear radiation, <Superscript>14</Superscript>C

This abstract is a prologue to this paper. Prior to his health failing, Martin Gibbs began writing remembrances of his education and beginning a science career, particularly on the peaceful uses of nuclear radiation, at the U.S. Brookhaven National Laboratory (BNL), Camp Upton, NY. Two years before his death Martin provided one of us (Govindjee) a draft text narrating his science beginnings in anticipation of publication in Photosynthesis Research. Govindjee edited his draft and returned it to him. Later, when it became difficult for him to complete it, he phoned Govindjee and expressed the desire that Govindjee publish this story, provided he kept it close to his original. Certain parts of Martin’s narrations have appeared without references (Gibbs 1999). The Gibbs family made a similar request since the narrations contained numerous early personal accounts. Clanton Black recently presented an elegant tribute on Martin Gibbs and his entire science career (Black 2008). Clanton was given the draft, which he and Govindjee then agreed to finish. This chronicle is their effort to place Gibbs’s narrations about his education and his maturation scientifically, in context with the beginnings of biological chemistry work with carbon-14 at the BNL (see Gibbs 1999). Further, these events are placed in context with those times of newly discovered radioisotopes which became available as part of the intensive nuclear research of World War II (WW II). Carbon-14, discovered during WW II nuclear research in 1940, was extremely useful and quickly led to the rapid discovery of new carbon metabolism pathways and biochemical cycles, e.g., photosynthetic carbon assimilation, within a decade after WW II.

A bioethanol process development unit: initial operating experiences and results with a corn fiber feedstock

Interest in bioethanol production from lignocellulosic feedstocks for use as an alternative fuel is increasing, but near-term commercialization will require a low cost feedstock. One such feedstock, corn fiber, was tested in the US Department of Energy (DOE)/National Renewable Energy Laboratory (NREL) bioethanol pilot plant for the purpose of testing integrated equipment operation and generating performance data. During initial runs in 1995, the plant was operated for two runs lasting 10 and 15 days each and utilized unit operations for feedstock handling, pretreatment by dilute sulfuric-acid hydrolysis, yeast inoculum production, and simultaneous saccharification and fermentation using a commercially available cellulase enzyme. Although significant operational problems were encountered, as would be expected with the startup of any new plant, operating experience was gained and preliminary data were generated on corn fiber pretreatment and subsequent fermentation of the pretreated material. Bacterial contamination was a significant problem during these fermentations.     

New ultralight automotive door life cycle assessment

The International Journal of Life Cycle Assessment - Magna International Inc. (Magna), in cooperation with the United States Department of Energy (U.S. DOE) and partners FCA US LLC (FCA US) and...     

The Genome Sequence DataBase (GSDB): meeting the challenge of genomic sequencing.

The genome sequence database (GSDB) is a complete, publicly available relational database of DNA sequences and annotation maintained by the National Center for Genome Resources (NCGR) under a Cooperative Agreement with the US Department of Energy (DOE). GSDB provides direct, client- server access to the database for data contributions, community annotation and SQL queries. The GSDB Annotator, a multi-platform graphic user interface, is freely available. Automatically updated relational replicates of GSDB are also freely available.     

Neoplastic transformation in vitro by mixed beams of high-energy iron ions and protons

The radiation environment in space is complex in terms of both the variety of charged particles and their dose rates. Simulation of such an environment for experimental studies is technically very difficult. However, with the variety of beams available at the National Space Research Laboratory (NSRL) at Brookhaven National Laboratory (BNL) it is possible to ask questions about potential interactions of these radiations. In this study, the end point examined was transformation in vitro from a preneoplastic to a neoplastic phenotype. The effects of 1?GeV/n iron ions and 1?GeV/n protons alone provided strong evidence for suppression of transformation at doses ≤5?cGy. These ions were also studied in combination in so-called mixed-beam experiments. The specific protocols were a low dose (10?cGy) of protons followed after either 5-15?min (immediate) or 16-24?h (delayed) by 1?Gy of iron ions and a low dose (10?cGy) of iron ions followed after either 5-15?min or 16-24?h by 1?Gy of protons. Within experimental error the results indicated an additive interaction under all conditions with no evidence of an adaptive response, with the one possible exception of 10?cGy iron ions followed immediately by 1?Gy protons. A similar challenge dose protocol was also used in single-beam studies to test for adaptive responses induced by 232?MeV/n protons and (137)Cs γ radiation and, contrary to expectations, none were observed. However, subsequent tests of 10?cGy of (137)Cs γ radiation followed after either 5-15?min or 8?h by 1?Gy of (137)Cs γ radiation did demonstrate an adaptive response at 8?h, pointing out the importance of the interval between adapting and challenge dose. Furthermore, the dose-response data for each ion alone indicate that the initial adapting dose of 10?cGy used in the mixed-beam setting may have been too high to see any potential adaptive response.     

低能离子束生物工程的发展趋势

简述了低能离子束生物技术在6个主要方面的研究成果。随着离子束生物技术不断发展,迫切需要建立一个更加完善的物理学平台,形成一个更加完整的研究体系,借助于其它学科的新技术或新工艺形成一个相互补充的技术集成体系,更应该将离子束生物技术的实用性和普遍性的范围不断地拓宽。明确提出了低能离子束生物工程的技术思路,即立足于低能离子束这一物理学技术平台,瞄准2个发展方向,促进3个有效转变,分清4个研究层次,注重5大生物学特性。     

DNA 测序技术领域的相关政府投入分析

DNA测序技术是遗传工程的核心技术之一,发展快速和低成本的基因测序技术成为研究焦点。美国、欧盟等发达国家和地区大力支持DNA测序技术的创新研究,并投入了大量的科研经费。在美国,国家卫生研究院(NIH)下属的国家人类基因组研究院(NHGRI)、美国能源部(DOE)以及美国科学基金委(NSF)等机构是进行DNA测序技术相关项目经费分配的主要政府部门。DNA测序作为生命科学研究的关键技术也是欧盟框架计划资助的重要内容之一,其以多个欧洲国家间合作以及产学研合作的形式开展。中国在DNA测序技术领域也开展了一些研究。     

Gravitational biology and space life sciences: Current status and implications for the Indian space programme

This paper is an introduction to gravitational and space life sciences and a summary of key achievements in the field. Current global research is focused on understanding the effects of gravity/microgravity on microbes, cells, plants, animals and humans. It is now established that many plants and animals can progress through several generations in microgravity. Astrobiology is emerging as an exciting field promoting research in biospherics and fabrication of controlled environmental life support systems. India is one of the 14-nation International Space Exploration Coordination Group (2007) that hopes that someday humans may live and work on other planets within the Solar System. The vision statement of the Indian Space Research Organization (ISRO) includes planetary exploration and human spaceflight. While a leader in several fields of space science, India is yet to initiate serious research in gravitational and life sciences. Suggestions are made here for establishing a full-fledged Indian space life sciences programme.     

National Workshop on Astrobiology: The Life Science Involvement of AAS–I Laben

The search for traces of past and present life is a complex and multidisciplinary research activity involving several scientific heritages and a specific industrial ability for planetary exploration. Laben was established in 1958 to design and manufacture electronic instruments for research in nuclear physics. In the mid 2004 the company was merged with Alenia Spazio. It is now part of Alcatel Alenia Space, a French Italian joint venture. Alcatel Alenia Space Italia SpA is a Finmeccanica Company. Currently the plant of Vimodrone provides a wide heritage in life science oriented to space application. The experience in Space Life Science is consolidated in the following research areas: (1) Physiology: Mouse models related to studies on human physiology Human neuroscience research and dosimetry (2) Animal Adaptation and Behaviour: mice behaviour related to stabling stress (3) Developmental Biology: aquatic microorganisms cultivation (4) Cell culture & Biotechnology: Protein crystal growth General purpose Multiwell Next Biotechnology studies and development: Bio reactor, mainly oriented to tissue engineering Microsensor for tissue control (organ replacement) Multiwell for adherent cell culture or for automated biosensor based on cell culture Experiment Container for organic systems Experiment Container for small animals Instrumentation based on fluorescent Biosensors Sensors for Life science experiments for Biopan capsule and Space Vehicle Ray Shielding Materials Random Positioning Machine specialisation (Support ground equipment) The biological features of this heritage is at disposal for the exobiology multi science. The involvement of industries, from the beginning of the exobiology projects, allows a cost effective technologies closed loop development between Research Centres, Principal Investigators and industry.     

The US Department of Energy Great Lakes Bioenergy Research Center: Midwestern Biomass as a Resource for Renewable Fuels

The Great Lakes Bioenergy Research Center is one of three Bioenergy Research Centers establish by the US Department of Energy and the only one based at an academic institution. The Center’s mission is to perform basic and applied science to enable economically and environmentally sustainable production of liquid fuels derived from biomass. The research is focused on converting plant biomass into soluble sugars and the sugars into fuels. A large group focused on sustainability informs and guides the applied research to ensure that new technology will provide the required environmental benefits.     

The Origin of the USDA Regional Biomass Research Centers

The U.S. Department of Agriculture (USDA) Regional Biomass Research Centers (RBRC) were created to contribute to the planning, research, and development of entire long-term sustainable biofuel production supply chains based on agricultural and forest-based feedstocks. The intent of the centers is to provide a catalyst that links feedstock genetic development, sustainable production and management, logistics, conversion, co-product production, distribution, and market demand suited to the available economic, social, and natural resources within different regions. The centers provide a coordinated, region-based research focus designed with relatively short-term deliverables to help accelerate the commercial production of biomass and other biofuel feedstocks. The centers provide a leadership structure for coordinating biomass research across the country, providing a national perspective that complements other USDA agency efforts designed to help US rural communities participate in the emerging biofuels and biobased products economy. Through coordination with the RBRC, USDA research and service agency programs and resources have been leveraged with the U.S. Department of Energy (DOE) and other federal department, university, and private industry efforts to help accelerate commercial advancement of advanced biofuel production to promote rural economic opportunities and achieve transportation biofuel policy goals.     

The Biotechnology Facility for International Space Station

The primary mission of the Cellular Biotechnology Program is to advance microgravity as a tool in basic and applied cell biology. The microgravity environment can be used to study fundamental principles of cell biology and to achieve specific applications such as tissue engineering. The Biotechnology Facility (BTF) will provide a state-of-the-art facility to perform cellular biotechnology research onboard the International Space Station (ISS). The BTF will support continuous operation, which will allow performance of long-duration experiments and will significantly increase the on-orbit science throughput.     

Use of a sedimentation column to obtain uniformly sized populations of multicell spheroids

Summary Multicell spheroids are useful as in vitro models for certain nodular tumors. Spheroids may contain subpopulations of cells that are necrotic, hypoxic, and redistributed through the cell cycle, and the relative fractions of these subpopulations can change as the spheroids grow. As a result, spheroids of different sizes may respond differently to any given treatment. For experimental studies it is important to use populations of spheroids of homogeneous size. Here we report the design and use of a sedimentation column that uses precision woven screen to obtain homogeneously sized populations of multicell spheroids quickly, accurately, aseptically, and reproducibly. This device may be applied in other biological fields also where separation of cell aggregates of a specific size is required. This research was supported by the DOE Graduate Laboratory Participant Program, and NIH Grants CA 11051, CA 20329, and CA 11198. This paper is also based on work performed under Contract DE-AC02-76EV03490 with the U.S. Department of Energy at the University of Rochester Department of Radiation Biology and Biophysics and has been assigned Report No. UR-3490-2095.     

Free air carbon dioxide enrichment: development,progress, results

Credible predictions of climate change depend in part on predictions of future CO₂ concentrations in the atmosphere. Terrestrial plants are a large sink for atmospheric CO₂ and the sink rate is influenced by the atmospheric CO₂ concentration. Reliable field experiments are needed to evaluate how terrestrial plants will adjust to increasing CO₂ and thereby influence the rate of change of atmospheric CO₂. Brookhaven National Laboratory (BNL) has developed a unique Free-Air CO₂ Enrichment (FACE) system for a cooperative research program sponsored by the U.S. Department of Energy and U.S. Department of Agriculture, currently operating as the FACE User Facility at the Maricopa Agricultural Center (MAC) of the University of Arizona. The BNL FACE system is a tool for studying the effects of CO₂ enrichment on vegetation and natural ecosystems, and the exchange of carbon between the biosphere and the atmosphere, in open-air settings without any containment. The FACE system provides stable control of CO₂ at 550 ppm ±10%, based on 1-min averages, over 90% of the time. In 1990, this level of control was achieved over an area as large as 380 m², at an annual operating cost of $668 m^–2. During two field seasons of enrichment with cotton (Gossypium hirsutum) as the test plant, enrichment to 550 ppm CO₂ resulted in significant increases in photosynthesis and biomass of leaves, stems and roots, reduced evapotranspiration, and changes in root morphology. In addition, soil respiration increased and evapotranspiration decreased.     

Tuning hydrogen storage of carbon nanotubes by mechanical bending: theoretical study

The effects of mechanical bending on tuning the hydrogen storage of titanium functionalised (4,0) carbon nanotube have been assessed using density functional theory calculations with reference to the ultimate targets of the US Department of Energy (DOE). The assessment has been carried out in terms of physisorption, gravimetric capacity, projected densities of states, statistical thermodynamic stability and reaction kinetics. The Ti atom binds at the hollow site of the hexagonal ring. The average adsorption energies (?0.54 eV) per hydrogen molecule meet the DOE target for physisorption (?0.20 to ?0.60 eV). The curvature attributed to the bending angle has no effect on the average adsorption energies per H₂ molecule. With no metal clustering, the system gravimetric capacities are expected to be as large as 9.0 wt%. The reactions of the deformed (bent) carbon nanotube have higher probabilities of occurring than those of the un-deformed carbon nanotube. The Gibbs free energies, enthalpies and entropies meet the ultimate targets of the DOE for all temperatures and pressures. The closest reactions to zero free energy occur at (378.15 K/2.961 atm.) and reverse at (340 and 360 K/1 atm.). The translational component is found to exact a dominant effect on the total entropy change with temperature. Favourable kinetics of the reactions at the temperatures targeted by DOE are reported regardless of the applied pressure. The more preferable thermodynamic properties assigned to the bending nanotube imply that hydrogen storage can be improved compared to the nonbending nanotube.     

A Green's function method for heavy ion beam transport

Abtract The use of Green's function has played a fundamental role in transport calculations for high-charge high-energy (HZE) ions. Two recent developments have greatly advanced the practical aspects of implementation of these methods. The first was the formulation of a closedform solution as a multiple fragmentation perturbation series. The second was the effective summation of the closedform solution through nonperturbative techniques. The nonperturbative methods have been recently extended to an inhomogeneous, two-layer transport media to simulate the lead scattering foil present in the Lawrence Berkeley Laboratories (LBL) biomedical beam line used for cancer therapy. Such inhomogeneous codes are necessary for astronaut shielding in space. The transport codes utilize the Langley Research Center atomic and nuclear database. Transport code and database evaluation are performed by comparison with experiments performed at the LBL Bevalac facility using 670A MeV²⁰Ne and 600A MeV⁵⁶Fe ion beams. The comparison with a time-of-flight and E detector measurement for the²⁰Ne beam and the plastic nuclear track detectors for⁵⁶Fe show agreement up to 35%–40% in water and aluminium targets, respectively.Submitted paper presented at the International Symposium on Heavy Ion Research: Space, Radiation Protection and Therapy, Sophia-Antipolis, France 21–24 March 1994     

Space radiation research in Europe: flight experiments and ground-based studies

Exposure to space radiation has long been acknowledged as a potential showstopper for long-duration manned interplanetary missions. In an effort to gain more information on space radiation risk and to develop countermeasures, NASA initiated several years ago a Space Radiation Health Program, which is currently supporting biological experiments performed at the Brookhaven National Laboratory. Accelerator-based radiobiology research in the field of space radiation research is also under way in Russia and Japan. The European Space Agency (ESA) supports research in the field in three main directions: spaceflight experiments on the International Space Station; modeling and simulations of the space radiation environment and transport; and, recently, ground-based radiobiology experiments exploiting the high-energy SIS18 synchrotron at GSI in Germany (IBER program). Several experiments are currently under way within IBER, and so far, beams of C and Fe-ions at energies between 11 and 1,000 MeV/n have been used in cell and tissue targets.     

The 'atom-splitting' moment of synthetic biology. Nuclear physics and synthetic biology share common features

Synthetic biology and nuclear physics share many commonalities in terms of public perception and funding. Synthetic biologists could learn valuable lessons from the history of the atomic bomb and nuclear power.On 16 July 1945, in the desert of New Mexico, the first nuclear bomb was exploded. It was a crucial moment in the history of the physical sciences—proof positive of the immense forces at work in the heart of atoms—and inevitably changed the world. In 2010, a team at the J. Craig Venter Research Institute in the USA first created artificial life by inserting a synthetic 1.08 megabase pair genome into a mycoplasma cell that lacked its own. They demonstrated that this new cell with its man-made genome was capable of surviving and reproducing [1]. It was a colossal achievement for biology, and its significance might well rank alongside the detonation of the first atomic bomb in terms of scientific advance.…as with post-war physics, synthetic biology''s promises of a brighter future might not all materialize and could have far-reaching effects on society, science and politicsThere are several similarities between twentieth century physics, and twentieth and twenty-first century biology. The nuclear explosion in New Mexico was the result of decades of research and the first splitting of an atom in Otto Hahn''s laboratory in 1938. It ushered in an era of new ideas and hopes for a brighter future built on the power of the atom, but the terrible potential of nuclear weapons and the threat of nuclear warfare ultimately overshadowed these hopes and changed the course of science and politics. The crucial achievement of synthetic life is a strikingly similar event; the culmination of decades of research that started with its own atom-splitting moment: recombinant DNA technology. It promises to bring forth a new era for biology and enable a huge variety of applications for industry, medicine and the military. However, as with post-war physics, synthetic biology''s promises of a brighter future might not all materialize and could have far-reaching effects on society, science and politics. Biology should therefore take note of the consequences of nuclear physics'' iconic event in 1945 for science, politics and society.To appreciate the similarities of these breakthroughs and their consequences for society, it is necessary to understand the historical perspective. The pivotal discoveries for both disciplines were related to fundamental elements of nature. The rise of nuclear physics can be traced back to the discovery of neutrons by James Chadwick in 1932 [2]. Neutrons are essential to the stability of atoms as they insulate the nucleus against the repulsive forces of its positively charged protons. However, the addition of an extra neutron can destabilize the nucleus and cause it to split, releasing more neutrons and a tremendous amount of energy. This nuclear fission reaction was first described by Otto Hahn and Fritz Strassmann in 1938. Leo Szilard realized the possibility of using the neutrons released from the fission of heavy atoms to trigger a nuclear chain reaction to release huge quantities of energy. The first successful chain reactions took place in 1942 in Germany at Leipzig University in the laboratory of Robert Döpel, and in the USA at the University of Chicago in the so-called Chicago Pile-1 reactor, developed by Enrico Fermi. These first nuclear reactors provided the proof of concept for using a nuclear chain reaction as a source of energy. However, even before that, Albert Einstein and Leo Szilard wrote to US President Franklin D. Roosevelt in 1939, suggesting that the US government should develop a new powerful bomb based on nuclear fission. President Roosevelt created the Manhattan Project, which developed the first atomic bomb in 1945.Similarly to nuclear physics, the advent of rDNA technology has concerned the public…The Cold War and the mutually assured nuclear destruction between the USA and the USSR fanned widespread fears about a nuclear Third World War that could wipe out human civilization; Robert Oppenheimer, one of the physicists who developed the atomic bomb, was actually among the first to warn of the spectre of nuclear war. By contrast, the civilian use of nuclear physics, mainly in the form of nuclear reactors, promised a brave new future based on harnessing the power of the atom, but it also generated increasing concerns about the harmful effects of radioactivity, the festering problems of nuclear waste and the safety of nuclear power plants. The nuclear disasters at the Chernobyl reactor in 1986 and the Fukushima power plant in 2011 heightened these concerns to the point that several nations might now abandon nuclear energy altogether.The fundamental discovery in biology, crucial to the creation of synthetic organisms was the double helix structure of DNA in 1953 by Francis Crick and James Watson [3]. The realization that DNA molecules have a universal chemical structure to store and pass on genetic information was the intellectual basis for the development of recombinant DNA (rDNA) technology and genetic engineering. Twenty years after this discovery, Stanley Cohen and Herbert Boyer first transferred DNA from one organism into another by using endonucleases and DNA ligases [4]. This early toolkit was later expanded to include DNA sequencing and synthesizing technologies as well as PCR, which culminated in the creation of the first artificial organism in 2010. Craig Venter''s team synthesized a complete bacterial chromosome from scratch and transferred it into a bacterial cell lacking a genome: the resulting cell was able to synthesize a new set of proteins and to replicate. This proof of concept experiment now enables scientists to pursue further challenges, such as creating organisms with fully designed genomes to achieve agro-biotechnological, commercial, medical and military goals.Similarly to nuclear physics, the advent of rDNA technology has concerned the public, as many fear that genetically modified bacteria could escape the laboratory and wreak havoc, or that the technology could be abused to create biological weapons. Unlike with nuclear physics, the scientists working on rDNA technology anticipated these concerns very early on. In 1974, a group of scientists led by Paul Berg decided to suspend research into rDNA technology to discuss possible hazards and regulation. This discussion took place at a meeting in Asilomar, California, in 1975 [5].A pertinent similarity between these two areas of science is the confluence of several disciplines to create a hybrid technoscience, in which the boundaries between science and technology have become transient [6]. This convergence was vital for the success of both nuclear physics and later synthetic biology, which combines biotechnology, nanotechnology, information technologies and other new fields that have been created along the way [7]. In physics, technoscience received massive support from the government when the military potential of nuclear fission was realized. Although the splitting of the atom took place before the Manhattan Project, the Second World War served as a catalyst to combine research in nuclear physics with organized and goal-directed funding. As most of this funding came from the government, it changed the relationship between politics and research, as scientists were employed to meet specific goals. In the wake of the detonation of the first atomic bombs, the post-war period was another watershed moment for politics, technoscience, industry and society as it generated new and more intimate relationships between science and governments. These included the appointment of a scientific advisor to the President of the USA, the creation of funding organizations such as the National Science Foundation, or research organizations such as the National Aeronautics and Space Administration, and large amounts of federal funding for technoscience research at private and public universities. It also led to the formation of international organizations such as the civilian-controlled International Atomic Energy Agency [6].There is no global war to serve as a catalyst for government spending on synthetic biology. Although the research has benefited tremendously from government agencies and research infrastructure, the funding for Venter''s team largely came from the private sector. In this regard, the relationship between biological techno-science and industry might already be more advanced than with the public sector given the enormous potential of synthetic life for industrial, medical and environmental applications.Research and innovation at universities has always played a vital role in the success of industry-based capitalism [8]; technoscience is now the major determinant of a knowledge-based economy or ''technocapitalism'' [9]. At the heart of technocapitalism are private and public organizations, driven by research and innovation, which are in sharp contrast to industrial capitalism, where the factories were production-driven and research was of less importance [10]. Furthermore, synthetic biology might provide valuable resources to the scientific community and thereby generate new research opportunities and directions for many biological fields [11].However, given the far-reaching implications of creating synthetic life and the risk of abuse, it is probable that the future relationship between synthetic biology and government will include issues of national security. In the light of potential misuse of synthetic biology for bioterrorism, and the safety risks involved in commercial applications, synthetic biology will eventually require some government regulation and oversight. In contrast to nuclear physics, in which the International Atomic Energy Commission was established only after the atomic bomb, the synthetic biology community should hold a new Asilomar meeting to address concerns and formulate guidelines and management protocols, rather than waiting for politicians or commercial enterprises to regulate the field.So far, synthetic biology differs from nuclear physics in terms of handling information. The Manhattan Project inevitably created a need for secrecy as it was created at the height of the Second World War, but the research maintained this shroud of secrecy after the war. After the bombing of Hiroshima and Nagasaki in August 1945, the US government released carefully compiled documents to the American public. The existence of useable nuclear power had been secret until then, and the control of information ensured that the public further supported or tolerated the technology of nuclear fission and the subsequent use of atomic bombs [12]. This initially positive view changed in the ensuing decades with the threat of a global nuclear war.…synthetic biology has side-stepped the mistakes of nuclear physics and might well achieve a more balanced public integration of future developmentsInformation management in synthetic biology differs from nuclear physics, in that most of the crucial breakthroughs are immediately published in peer-reviewed journals and covered by the media. The value of early public discourse on science issues is evident from the reaction towards genetically modified crops and stem cell research. In this regard, synthetic biology has side-stepped the mistakes of nuclear physics and might well achieve a more balanced public integration of future developments.The main issues that might threaten to dampen public support for synthetic biology and favourable public perception are ethics and biosecurity concerns. Ethical concerns have already been addressed in several forums between scientists and public interest groups; this early engagement between science and society and their continuing dialogue might help to address the public''s ethical objections. In terms of biosecurity, biology might learn from nuclear physics'' intimate entanglement with politics and the military. Synthetic biologists should maintain control and regulation of their research and avoid the fate of nuclear physicists, who were recruited to fight the Cold War and were not free to pursue their own research. For synthetic biology to stay independent of government, industry and society, it must capitalize on its public engagement and heed the lessons and mistakes of nuclear physics'' atom-splitting moment. It should not just evaluate, discuss and address the risks for human or environmental health or biosafety concerns, but should also evaluate potential risks to synthetic biology research itself that could either come from falling public acceptance or government intrusion.? Open in a separate windowAlex J ValentineOpen in a separate windowAleysia KleinertOpen in a separate windowJerome Verdier     

Particle radiation alters expression of matrix metalloproteases resulting in ECM remodeling in human lens cells

Relatively low doses of space radiation have been correlated with an increased incidence and earlier appearance of cataracts in space travelers. The lens is a radiosensitive organ of the body with a very obvious late end point of radiation damage—cataract. However, many molecular changes occur in the lens soon after radiation exposure and long before the appearance of an opacification. The goal of our research is to elucidate early mechanisms associated with particle radiation-induced cataractogenesis, with the ultimate goal of developing countermeasures. Normal, cultured non-immortalized human lens cells were grown on matrix-coated plastic tissue culture vessels and irradiated with particle beams at Lawrence Berkeley National Lab (LBNL) or at the NASA Space Radiation Laboratory (NSRL) at Brookhaven National Lab. Samples were harvested at different times after radiation exposure. Using a focused genetic approach, total RNA and protein extracts from control and irradiated samples were processed and probed for the expression of genes associated with extracellular matrix (ECM) proteases. Matrix metalloproteinases (MMPs) have previously been studied in adult postmortem human lenses, in post-cataract intraocular lens (IOL) surgery capsular bags and with immortalized human lens cell cultures. Significant differences exist in the expression pattern with these various model systems. We have evidence for the cell stage-specific expression of MMP family of genes during lens fiber differentiation, and for radiation-induced alterations in the misregulation of MMP expression. Our data indicate that radiation exposure may lead to differences in the expression of radiation stress responses, which may impact selective ECM remodeling and cell differentiation