Evidence for recombination between N- and B-tropic murine leukemia viruses.

After co-infection of Sc-1 cells with N- and B-tropic murine leukemia viruses that differ in their XC plaque morphology, Hopkins et al. (1976) obtained viruses, designated XLP-N, that appeared to be recombinants, since they possess the N-tropism of one parent and the XC plaque morphology of the other (the B-tropic virus) parent. Here we present evidence, based on antigenicity and electrophoretic mobility, that some clonal isolates of XLP-N have inherited gp70 gene of their B-tropic virus parent. In addition to providing evidence that XLP-N viruses are recombinants, the fact that an N-tropic virus may apparently possess a gp70 derived from a B-tropic virus provides evidence, which is in agreement with the findings of others (Huang et al., 1973; Krontiris et al., 1973) that the N- or B-tropism of murine leukemia virus does not reside in gp70.     

Obtaining the child testimony in the criminal proceedings

Children fall under the special category of vulnerable witnesses. Children's vulnerability is the reason that we must approach obtaining the child's testimony in the criminal proceedings with special attention. It is important to take the child's testimony as soon as possible and to avoid the repetition of interrogation. The criminal proceedings law and the juvenile court law enable children interrogation through the professional person without the presence of other parties in the procedure and enable the recording of such interrogation by audio-video link which considerably diminish the secondary victimization. The professionals who obtain the testimony must be well acquainted with children's psychological development. Knowledge of psychological development is of major importance in order to make the quality arrangements for interrogation and to interrogate the child and to achieve positive social contact between the examiner and the examinee and it is also of great importance for the credibility evaluation of the child's testimony. The adequate way of children interrogation will enable the child to say the correct information and to recognize the perpetrator. The forensic interview is well elaborated and child adapted technique of interrogation. Respecting the rules of forensic interview will enable the child's testimony on court to be relevant evidence.     

Pretrial preparations can improve a physician's value as an expert witness.

Many physicians appear in court as expert witnesses, but the quality of their testimony varies considerably, says a Nova Scotia judge. Pretrial preparation will improve the quality of a physician''s testimony, reduce stress and save time, says Judge Timothy Daley, who provides some suggestions about how to prepare to be an expert witness and what to expect in the courtroom.     

A Doctor’s Testimony: Medical Neutrality and the Visibility of Palestinian Grievances in Jewish-Israeli Publics

This paper follows the testimony of Izzeldin Abuelaish, a Palestinian physician who bears witness to his experiences working, living, and suffering under Israeli rule. He presents his story as a doctor’s story, drawing on his identity as a medical professional to gain credibility and visibility and to challenge the limited legitimacy of Palestinian grievances. In this paper, I explore his testimony as a medical voice that at once recounts the suffering and loss endured by the Palestinian people and also struggles to negotiate the values associated with being a “reliable” witness. Consequently, I ethnographically examine the social life and reception of his story in Jewish-Israeli publics. In comparison with most Palestinian narratives, Abuelaish’s testimony achieved an extremely rare degree of visibility and sympathy, a phenomenon that calls out for analysis. I identify the boundaries that typically render Palestinian grievances invisible to Israeli publics and suggest how medicine’s self-proclaimed ethos of neutrality served as a channel for crossing them. Finally, I reflect on the political possibilities and limitations of medical witnessing to render suffering visible and arouse compassion toward those construed as a dangerous/enemy Other.     

‘Illuminating the broader context’: anthropological and historical knowledge at the International Criminal Tribunal for Rwanda

Historians and anthropologists have been among the experts called to enlighten non‐Rwandan judges at the International Criminal Tribunal for Rwanda. Given that the Tribunal's regulations provide little guidance on who qualifies as an expert and that judges are not bound by national rules of evidence, judges exercise considerable discretion on who may provide expert testimony. By considering judges' scepticism towards repetitive expert testimony and that experts have changed their opinion because of information revealed in the course of the trials, this article seeks to convey the distinct characteristics of this innovative context and re‐evaluate the assumption that anthropologists and historians are inevitably engaged in an epistemological contest with law when they act as experts in criminal trials.     

HEART DISEASE UNDER WORKMEN'S COMPENSATION

In expert testimony before the Industrial Accident Commission, all physicians are taken as equally competent. The value of their testimony depends upon the validity of their data and the reasons for the conclusions drawn. In case of conflicting opinion, the referees, who are laymen, must decide on the basis of the testimony. Therefore physicians preparing reports must see that data are complete, that all routine investigative procedures are not only applied but reported, and that the reasons for claiming connection of injury with employment are fully stated. Moreover, other recognized causes of the patient''s condition should be considered and ruled out for reasons given.The increasing number of claims for workmen''s compensation in heart disease, and the increasing tendency of insurers to settle rather than contest claims, may actually be harmful to the welfare of persons with heart disease, for it deters employers from hiring them and thus risking higher insurance costs. Physicians concerned with compensation claims must develop more widely acceptable standards that properly separate the inherent risk of heart disease from that incurred through employment for which the employer may reasonably be considered liable.     

Risky subjects: narrative,literary <Emphasis Type="Italic">testimonio</Emphasis> and legal testimony

This article compares the textual production of legal testimony with that of literary testimonio. Using the controversy sparked by David Stoll’s exposé of Rigoberta Menchú’s less than “factual” account of her life lived amidst the genocide of indigenous peoples in Guatemala, the analysis asks why Menchú should be indicted or acquitted based on cultural notions of legal testimony. I use the concept of language ideologies to explore how listeners hold narrators to standards of truth. By suggesting that there are interpretive ideologies of narrative production and function at work, the argument is made that any detractor can find a way to discredit narrative truth. I show this by examining how Latina women and state actors create legal testimony about domestic abuse. While these narratives share much with the Menchú testimonio, in particular the risks they present to their narrators, I conclude that the everyday victim in the U.S. adversarial system has much more to lose, and inevitably has far less discursive power, than Menchú. I examine these topics and themes from sociolinguistic and discourse analytic perspectives.     

Inhibition of gap-junctional intercellular communication between epithelial cells transformed by the activated H-ras-1 oncogene

In order to study the effects of an activated H-ras-1 oncogene on gap-junctional intercellular communication, we introduced the EJ/T24 H-ras-1 oncogene into cells of the epithelial Clone 9-3 cell line. Gap-junctional intercellular communication was significantly reduced in H-ras-1-transformed Clone 9-3 derivatives; this result shows that transformation by the activated H-ras-1 oncogene can inhibit gap-junctional intercellular communication. We postulate that the activated H-ras-1 oncogene product could mediate this effect through a change in the phosphorylation of the major gap-junction protein.     

Elimination of extrachromosomal c-myc genes by hydroxyurea induces apoptosis

Hydroxyurea (HU) increases extrachromosomal DNA elimination in tumor cell lines. The c-myc oncogene is one of the many relevant amplified genes contained within the extrachromosomal DNA compartment. Spontaneous loss of amplified copies of c-myc induces terminal differentiation and apoptosis in the human HL-60 leukemia cell lines. In the present study, we evaluate HU's ability to induce apoptosis by eliminating extrachromosomally located c-myc oncogene in human tumor cell lines. The consequences of eliminating extrachromosomal DNA by HU were explored in two different cell lines using the TdT assay and acridine orange/ethidium bromide labeling. COLO 320 clone 3 and COLO 320 clone 21 cell lines contain the same number of amplified copies of c-myc oncogene, but located respectively on extrachromosomal DNA, and intrachromosomally in homogeneously staining regions. HU induced apoptosis in the COLO 320 clone 3 cell line by a time and concentration dependent mechanism but could not induce apoptosis in the COLO 320 clone 21 cell line. These results suggested that HU-induced apoptosis in COLO 320 cell lines depends on elimination of extrachromosomal amplified copies of the c-myc oncogene. The ability of HU to eliminate extrachromosomally amplified copies of the c-myc oncogene and to induce apoptosis should be considered when targeting malignancies with amplification of the c-myc oncogene in an extrachromosomal site.     

Teaching reading,writing, speaking and risk: dialoguing with Eades,French and Lecuna

This article compares the textual production of legal testimony with that of literary testimonio. Using the controversy sparked by David Stoll’s exposé of Rigoberta Menchú’s less than “factual” account of her life lived amidst the genocide of indigenous peoples in Guatemala, the analysis asks why Menchú should be indicted or acquitted based on cultural notions of legal testimony. I use the concept of language ideologies to explore how listeners hold narrators to standards of truth. By suggesting that there are interpretive ideologies of narrative production and function at work, the argument is made that any detractor can find a way to discredit narrative truth. I show this by examining how Latina women and state actors create legal testimony about domestic abuse. While these narratives share much with the Menchú testimonio, in particular the risks they present to their narrators, I conclude that the everyday victim in the U.S. adversarial system has much more to lose, and inevitably has far less discursive power, than Menchú. I examine these topics and themes from sociolinguistic and discourse analytic perspectives.     

Transnational Storytelling: Human Rights, WITNESS, and Video Advocacy

Video is increasingly utilized by human rights groups as a component in their advocacy strategies. This article looks at how video is used for a range of local, national, and transnational human rights audiences—both traditional and alternative. Drawing on a case study from the Philippines, it considers the challenges and issues faced by WITNESS (www.witness.org), its locally based human rights partners, and other similar organizations as they create and use video as visual evidence, testimony, and moral story before local, international, and transnational human rights audiences. These challenges include the contextualization of stories and sight bites, dilemmas of moving testimony between advocacy and media arenas, and the difficulties of establishing an ethical relationship, a community of witness, at a distance. This article is written in a personal capacity, although it draws on my experiences working as Program Manager at WITNESS.     

Ras (proto)oncogene induces N-linked carbohydrate modification: temporal relationship with induction of invasive potential

The effect of expression of the ras oncogene on protein glycosylation was studied. VSV G-protein and class I histocompatibility antigens were analysed to monitor ras-mediated changes in glycosylation. Transient expression of the c-Ha-ras oncogene, introduced into NIH 3T3 cells by the DEAE-dextran method, altered protein glycosylation within 25 h of transfection. The same result was obtained after dexamethasone-induced expression of p21-ras in stable NIH 3T3 transfectants containing either an activated Ha-ras oncogene or a normal N-ras proto-oncogene under control of the glucocorticoid-inducible MMTV promoter. The alteration of cell surface carbohydrates, induced by the ras (proto)oncogene and the subsequent acquisition of invasive potential, occurred prior to morphological transformation.     

Stem-cell driven cancer: "Hands-off" regulation of cancer development

A cancer dogma states that inactivation of oncogene(s) can cause cancer remission, implying that oncogenes are the Achilles' heel of cancers. This current “hands on” model of cancer has kept oncogenes firmly in focus as therapeutic targets and is in agreement with the fact that in human cancers all cancerous cells, with independence of the cellular heterogeneity existing within the tumour, carry the same oncogenic genetic lesions. This rule has now been broken in a study of the effect of the BCR-ABL oncogene in cancer development in a mouse model in which oncogene expression is restricted to the stem cell compartment. BCR-ABL is linked to chronic myeloid leukemia (CML) disease in humans, and this study shows that by limiting the oncogene expression to Sca1+ cells CML arises, indicating that maintenance of oncogene expression is not critical for the generation of differentiated tumor cells and showing a “hands off” role for BCR-ABL in regulating cancer formation. Here we provide an update on the use of this system for modeling human cancer and its potential application for therapeutic targeting of cancer stem cells (CSCs) and the hands-off function of oncogenes.     

人胃癌Ha-ras基因及上游区片段甲基化对转化效率及表达的影响

 本文将克隆于pBR322的人胃癌Ha-ras基因(PGC6.6)和带有上游区片段的Ha-ras基因(PGC9.1)的CC~*GG位点甲基化后,转化NIH3T3细胞。发现pGC6.6甲基化与非甲基化对转化效率无明显影响,而pGC9.1甲基化后转化效率明显低于非甲基化pGC9.1者,甲基化/非甲基化pGC9.1的转化效率均明显高于甲基化/非甲基化pGC6.6者。本文又对人胃癌组织及癌旁组织DNA中Ha-ras基因的HpaⅡ、Msp Ⅰ限制性内切酶图谱作了比较,并同对比较了癌及癌旁组织中Ha-ras基因的mRNA水平,发现一例病人癌组织中Ha-ras基因的CC~*GG位点甲基化程度较癌旁组织中者低,且该例中Ha-ras基因表达水平在癌组织中明显地高。这些结果,结合我们以前的研究表明:在人胃Ha-ras癌基因上游区可能存在一增强子样作用的区域,对Ha-ras基因起调控作用。该上游区CC~*GG位点的甲基化能降低这种调控作用。仅Ha-ras结构基因的CC~*GG位点甲基化不足以明显影响其转化活性。在体内,Ha-ras基因甲基化水平降低可能与其达表水平升高以至诱发癌症有关。     

National Institute on Drug Abuse genomics consortium white paper: Coordinating efforts between human and animal addiction studies

The National Institute on Drug Abuse Genetics and Epigenetics Cross‐Cutting Research Team convened a diverse group of researchers, clinicians, and healthcare providers on the campus of the University of California, San Diego, in June 2018. The goal was to develop strategies to integrate genetics and phenotypes across species to achieve a better understanding of substance use disorders through associations between genotypes and addictive behaviors. This conference (a) discussed progress in harmonizing large opioid genetics cohorts, (b) discussed phenotypes that are used for genetics studies in humans, (c) examined phenotypes that are used for genetics studies in animal models, (d) identified synergies and gaps in phenotypic analyses of human and animal models and (e) identified strategies to integrate genetics and genomics data with phenotypes across species. The meeting consisted of panels that focused on phenotype harmonization (Dr. Laura Bierut, Dr. Olivier George, Dr. Dan Larach and Dr. Sesh Mudumbai), translating genetic findings between species (Dr. Elissa Chesler, Dr. Gary Peltz and Dr. Abraham Palmer), interpreting and understanding allelic variations (Dr. Vanessa Troiani and Dr. Tamara Richards) and pathway conservation in animal models and human studies (Dr. Robert Hitzemann, Dr. Huda Akil and Dr. Laura Saba). There were also updates that were provided by large consortia (Dr. Susan Tapert, Dr. Danielle Dick, Dr. Howard Edenberg and Dr. Eric Johnson). Collectively, the conference was convened to discuss progress and changes in genome‐wide association studies.     

Isolation of a transforming sequence from a human bladder carcinoma cell line

We have isolated the component of human bladder carcinoma cell DNA that is able to transform mouse fibroblasts. The oncogenic sequence was isolated initially from a lambda phage genomic library made from DNA of a transfected mouse cell carrying the human oncogene. A subcloned insert of 6.6 kb that carried transforming activity was amplified in the plasmid vector pBR322. The subcloned oncogene has been used as a sequence probe in Southern blot analyses. The oncogene appears to derive from sequences present in normal cellular DNA. Structural analysis has failed so far to reveal differences between the oncogene and its normal cellular homolog. The oncogene is unrelated to transforming sequences detected in a variety of other types of human tumor cell lines derived from colonic and lung carcinoma and from neuroblastoma. In contrast, the EJ bladder oncogene appears closely related to one that is active in the human T24 bladder carcinoma cell line. The oncogene appears to have undergone little, if any, amplification in several bladder carcinoma cell lines.     

表皮生长因子对neu基因表达的诱导作用（简报）

The erb B2/neu oncogene encodes a protein which sequence is closely similar to the epidermal growth factor receptor (EGFR). We have previously found that EGF can induce the expression of erb B1/EGFR gene in normal and 3H-TdR transformed C3H/10T1/2CL8 mouse embryo fibroblast cells i.e. NC3H10 and TC 3H10 respectively, but we do not know whether the neu oncogene expression can be induced by EGF. In this study, the effect of EGF on NC3H10 and TC3H10 has been observed by Northern blot analysis. The result indicated that EGF had a obvious induction effect on neu oncogene expression in these cells. Thus, the expression of both erbB 1/EGFR gene and erbB 2/neu oncogene can be induced by EGF. This result may provide a novel clue to the molecular mechanism of EGF action in cell nucleus.     

表皮生长因子对neu基因表达的诱导作用(简报)

Shih等首次通过NIH/3T3细胞转染试验在乙基亚硝脲(ENU)诱导的大鼠神经胶质纤维瘤中分离鉴定出一种转化基因,称之为neu基因,其表达可导致培养的NIH/3T3细     

Modelling the ATP-binding site of oncogene products, the epidermal growth factor receptor and related proteins

A three-dimensional model for the ATP-binding site of the oncogene product v-src is proposed by the use of interactive computer graphics. A similar model would apply to sequence related proteins such as other oncogene products, the epidermal growth factor receptor, cAMP-dependent protein kinase and the cell division control protein CDC28. The model was proposed on the basis of the conservation of certain key residues between the oncogene product family of proteins and several nucleotide binding proteins of known structures.