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Krishanu Saha J. Benjamin Hurlbut Sheila Jasanoff Aziza Ahmed Anthony Appiah Elizabeth Bartholet Françoise Baylis Gaymon Bennett George Church I. Glenn Cohen George Daley Kevin Finneran William Hurlbut Rudolf Jaenisch Laurence Lwoff John Paul Kimes Peter Mills Jacob Moses Christiane Woopen 《Trends in biotechnology》2018,36(8):741-743
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J. Benjamin Hurlbut Sheila Jasanoff Krishanu Saha Aziza Ahmed Anthony Appiah Elizabeth Bartholet Françoise Baylis Gaymon Bennett George Church I. Glenn Cohen George Daley Kevin Finneran William Hurlbut Rudolf Jaenisch Laurence Lwoff John Paul Kimes Peter Mills Jacob Moses Christiane Woopen 《Trends in biotechnology》2018,36(7):639-641
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自从克隆羊多莉诞生以来,有关克隆人的伦理学争论就一直喋喋不休。世界上的各种政治组织和各国政府都明确反对生殖性克隆,而科学家们则对克隆技术的不完善心存疑虑。为了克服克隆过程中的伦理学障碍和技术缺陷,科学家们在核移植技术的基础上,又发展了异种核移植技术、诱导多能干细胞技术等。诱导的多能干细胞可以分化成各种组织,甚至能发育成个体,这些方法使克隆技术不再破坏胚胎,避免了伦理学纠纷。尽管科学技术在进步,但是人们对克隆人仍有很多不解和困惑。从自主、不伤害、行善和公正等四大生命伦理学原则着手,在技术层面上提出了尽管克隆人不会搞乱人际关系,不会减少人类基因多样性,也不会克隆出类似希特勒的战争狂人,但是,人类的生殖性克隆却剥夺了克隆人的自主性,对克隆人的生理和心理都有所伤害,违反了公正和行善的原则。因此,是否可以克隆人在伦理上仍然是需要长期讨论的问题。 相似文献
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In establishing National Bioethics Organisations (NBOs), liberal democracies seek to acknowledge the diversity of strongly held ethical positions and the imperative to engage in public debate about important bioethical decisions. NBOs are typically given a range of responsibilities, including contributing to and stimulating public debate; providing expert opinion on relevant issues for policy deliberations; and developing public policy. The state is now found to have an interest in areas previously thought to be a matter of individual choice. NBOs can provide one way of opening up public debate to allow the diversity of views to be heard in a manner that is well‐informed, articulate and responsive to both expert and ‘lay’ public views. We draw on debates in political theory about democratic decision‐making and on the policy making roles of some key NBOs. We are particularly interested in examining the capacity of NBOs to meet the democratic ideal of effective participation by the public, or citizenry, especially by those who are directly affected by the policies, in the development of effective public policy. We provide a basic framework for policy development involving NBOs that can begin to meet this ideal, a process of ‘contested deliberation’. 相似文献
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David B. Resnik 《Bioethics》2016,30(8):649-652
Two articles published in Bioethics recently have explored the ways that bioethics can contribute to the climate change debate. Cheryl Cox Macpherson argues that bioethicists can play an important role in the climate change debate by helping the public to better understand the values at stake and the trade‐offs that must be made in individual and social choices, and Sean Valles claims that bioethicists can contribute to the debate by framing the issues in terms of the public health impacts of climate change. While Macpherson and Valles make valid points concerning a potential role for bioethics in the climate change debate, it is important to recognize that much more than ethical analysis and reflection will be needed to significantly impact public attitudes and government policies. 相似文献
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Over the last decade, stem cell research has generated an enormous amount of public, political and bioethical debate. These debates have overwhelmingly tended to focus on two moral issues: the moral status of human embryos and the duty to care for the sick and vulnerable. This preoccupation, especially on the question of moral status, has not only dichotomized the debate around two fundamentally incommensurable positions, it has come at the cost of other important issues largely being ignored. In highlighting some of the bioethical and regulatory deficiencies of this fixation, we draw on recent developments in the experimental use of autologous adult stem cells to argue for a more inclusive approach to the ethical issues surrounding stem cell research. 相似文献
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Aditya Bharadwaj 《Ethnos》2014,79(1):84-107
Drawing on Foucault's notion of subject formation or subjectification, this article shows how a process of experimental subjectification, a wilful submission and participation in seemingly experimental treatments, produces both empowering and life-affirming experiences as well as a critique of established scientific norms and practices. The article examines processes of experimental subjectification in the narratives of patients pursuing clinical application of human embryonic stem cells in India to treat chronic spinal cord injury and in the narrative of the director of the clinic providing the treatment. The article addresses how the clinic's director and patients from around the globe continue to successfully pursue embryonic stem cell therapies, despite intense media speculation and scientific scrutiny labelling the clinic as a maverick experimental site. 相似文献
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世界主要国家的干细胞研究最新动态 总被引：1，自引：0，他引：1
杜艳艳 《中国生物工程杂志》2009,29(6):151-154
介绍了主要国家干细胞研究的政策支持、成果产出及市场需求动态。利用SCI引文数据库和Derwent数据库收录的论文和专利信息,对1995年~2008年主要国家干细胞研究的论文和专利进行了分析,以供我国干细胞研究者参考。 相似文献
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Quang Le Vedavathi Madhu Joseph M Hart Charles R Farber Eli R Zunder Abhijit S Dighe Quanjun Cui 《World journal of stem cells》2021,13(9):1248-1277
Injuries to the postnatal skeleton are naturally repaired through successive steps involving specific cell types in a process collectively termed “bone regeneration”. Although complex, bone regeneration occurs through a series of well-orchestrated stages wherein endogenous bone stem cells play a central role. In most situations, bone regeneration is successful; however, there are instances when it fails and creates non-healing injuries or fracture nonunion requiring surgical or therapeutic interventions. Transplantation of adult or mesenchymal stem cells (MSCs) defined by the International Society for Cell and Gene Therapy (ISCT) as CD105+
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多能干细胞,如胚胎干细胞（embryonic stem cells,ESCs）、诱导多能干细胞（induced pluripotent stem cells,iPSCs）和成体干细胞（adultstemcells,ASCs）,是一类具有巨大潜能的独特细胞。猪作为试验材料,在遗传、代谢、生理生化及基因序列等方面较小鼠更接近于人类,正逐渐成为人类异种移植和再生医学研究的理想生物学模型。然而,目前对猪多能干细胞种类、来源、特征及机制的有限认识直接阻碍了其相关应用。该文将分别对猪ASCs的研究现状、猪类ESCs的分离培养、猪iPSCs的研究进展、多能干细胞间的联系和展望进行论述,以期为从事该领域研究的科研人员提供参考。 相似文献
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Jun-Lin Guan Anna Katharina Simon Mark Prescott Javier A. Menendez Fei Liu Fen Wang Chenran Wang Ernst Wolvetang Alejandro Vazquez-Martin Jue Zhang 《Autophagy》2013,9(6):830-849
Autophagy is a highly conserved cellular process by which cytoplasmic components are sequestered in autophagosomes and delivered to lysosomes for degradation. As a major intracellular degradation and recycling pathway, autophagy is crucial for maintaining cellular homeostasis as well as remodeling during normal development, and dysfunctions in autophagy have been associated with a variety of pathologies including cancer, inflammatory bowel disease and neurodegenerative disease. Stem cells are unique in their ability to self-renew and differentiate into various cells in the body, which are important in development, tissue renewal and a range of disease processes. Therefore, it is predicted that autophagy would be crucial for the quality control mechanisms and maintenance of cellular homeostasis in various stem cells given their relatively long life in the organisms. In contrast to the extensive body of knowledge available for somatic cells, the role of autophagy in the maintenance and function of stem cells is only beginning to be revealed as a result of recent studies. Here we provide a comprehensive review of the current understanding of the mechanisms and regulation of autophagy in embryonic stem cells, several tissue stem cells (particularly hematopoietic stem cells), as well as a number of cancer stem cells. We discuss how recent studies of different knockout mice models have defined the roles of various autophagy genes and related pathways in the regulation of the maintenance, expansion and differentiation of various stem cells. We also highlight the many unanswered questions that will help to drive further research at the intersection of autophagy and stem cell biology in the near future. 相似文献
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RUTH MACKLIN 《Bioethics》2010,24(5):211-217
Fast forward 50 years into the future. A look back at what occurred in the field of bioethics since 2010 reveals that a conference in 2050 commemorated the death of bioethics. In a steady progression over the years, the field became increasingly fragmented and bureaucratized. Disagreement and dissension were rife, and this once flourishing, multidisciplinary field began to splinter in multiple ways. Prominent journals folded, one by one, and were replaced with specialized publications dealing with genethics, reproethics, nanoethics, and necroethics. Mainstream bioethics organizations also collapsed, giving way to new associations along disciplinary and sub‐disciplinary lines. Physicians established their own journals, and specialty groups broke away from more general associations of medical ethics. Lawyers also split into three separate factions, and philosophers rejected all but the most rigorous, analytic articles into their newly established journal. Matters finally came to a head with global warming, the world‐wide spread of malaria and dengue, and the cost of medical treatments out of reach for almost everyone. The result was the need to develop plans for strict rationing of medical care. At the same time, recognition emerged of the importance of the right to health and the need for global justice in health. By 2060, a spark of hope was ignited, opening the door to the resuscitation of bioethics and involvement of the global community. 相似文献
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Huan-Ting Lin Makoto Otsu Hiromitsu Nakauchi 《Philosophical transactions of the Royal Society of London. Series B, Biological sciences》2013,368(1609)
In recent times, the epigenetic study of pluripotency based on cellular reprogramming techniques led to the creation of induced pluripotent stem cells. It has come to represent the forefront of a new wave of alternative therapeutic approaches in the field of stem cell therapy. Progress in drug development has saved countless lives, but there are numerous intractable diseases where curative treatment cannot be achieved through pharmacological intervention alone. Consequently, there has been an unfortunate rise in incidences of organ failures, degenerative disorders and cancers, hence novel therapeutic interventions are required. Stem cells have unique self-renewal and multilineage differentiation capabilities that could be harnessed for therapeutic purposes. Although a number of mature differentiated cells have been characterized in vitro, few have been demonstrated to function in a physiologically relevant context. Despite fervent levels of enthusiasm in the field, the reality is that other than the employment of haematopoietic stem cells, many other therapies have yet to be thoroughly proven for their therapeutic benefit and safety in application. This review shall focus on a discussion regarding the current status of stem cell therapy, the issues surrounding it and its future prospects with a general background on the regulatory networks underlying pluripotency. 相似文献
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SIRINE SHEBAYA ANDREA SUTHERLAND ORIN LEVINE RUTH FADEN 《Developing world bioethics》2010,10(3):141-149
Current strategies to address global inequities in access to life‐saving vaccines use averaged national income data to determine eligibility. While largely successful in the lowest income countries, we argue that this approach could lead to significant inefficiencies from the standpoint of justice if applied to middle‐income countries, where income inequalities are large and lead to national averages that obscure truly needy populations. Instead, we suggest alternative indicators more sensitive to social justice concerns that merit consideration by policy‐makers developing new initiatives to redress health inequities in middle‐income countries. 相似文献
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Introduction (1) Human embryonic stem (ES) cells are pluripotent but are difficult to be used for therapy because of immunological, oncological and ethical barriers. (2) Pluripotent cells exist in vivo, i.e., germ cells and epiblast cells but cannot be isolated without sacrificing the developing embryo. (3) Reprogramming to pluripotency is possible from adult cells using ectopic expression of OKSM and other integrative and non-integrative techniques. (4) Hurdles to overcome include i.e stability of the phenotype in relation to epigenetic memory. Sources of data We reviewed the literature related to reprogramming, pluripotency and fetal stem cells. Areas of agreement (1) Fetal stem cells present some advantageous characteristics compared with their neonatal and postnatal counterparts, with regards to cell size, growth kinetics, and differentiation potential, as well as in vivo tissue repair capacity. (2) Amniotic fluid stem cells are more easily reprogrammed to pluripotency than adult fibroblast. (3) The parental population is heterogeneous and present an intermediate phenotype between ES and adult somatic stem cells, expressing markers of both. Areas of controversy (1) It is unclear whether induced pluripotent stem (iPS) derived from amniotic fluid stem cells are fully or partially reprogrammed. (2) Optimal protocols to ensure highest efficiency and phenotype stability remains to be determined. (3) The “level” of reprogramming, fully vs partial, of iPS derived from amniotic fluid stem cells remain to be determined. Growing points Banking of fully reprogrammed cells may be important both for (1) autologous and allogenic applications in medicine, and (2) disease modeling. 相似文献
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《Cell Stem Cell》2020,26(3):377-390.e6
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Stem cells: is there a future in plastics? 总被引：3，自引：0，他引：3
Margaret A. Goodell 《Current opinion in cell biology》2001,13(6):662-665
The concept that ostensibly tissue-specific stem cells can give rise to cells of heterologous lineages has gained support from studies using purified hematopoietic stem cells and sensitive donor-cell tracking methods. The ability to exploit these findings in clinical settings will probably depend on new insights into the mechanisms by which such stem cells or their progeny migrate to sites of organ damage and differentiate to cell types competent to participate in tissue regeneration. 相似文献
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