• In 2011, scientists at the New York Stem Cell Foundation announced that they had succeeded in generating embryonic stem cell lines, but their process involved leaving the oocyte's nucleus in place, resulting in triploid cells, which would not be useful for cloning. (wikipedia.org)
  • Four embryonic stem cell lines from human fetal somatic cells were derived from those blastocysts. (wikipedia.org)
  • Stem cell technologies have been dogged by controversy because of objections over the morality of sacrificing human embryos to produce the first human embryonic stem cell lines. (schlich.co.uk)
  • In the real world, there is no such thing scientifically as a "pre-embryo", or "just a genetic individual" as opposed to a "developmental individual. (lifeissues.net)
  • To take human organ generation via BC and transplantation to the next step, we reviewed current emerging organ generation technologies and the associated efficiency of chimera formation in human cells from the standpoint of developmental biology. (frontiersin.org)
  • These developmental defects have been attributed to incomplete reprogramming of the somatic nuclei by the cloning process. (biomedcentral.com)
  • Developmental defects, including abnormalities in cloned fetuses and placentas, in addition to high rates of pregnancy loss and neonatal death have been encountered by every research team studying somatic cloning. (biomedcentral.com)
  • Many of these developmental abnormalities are common to human development. (edu.au)
  • Research advocates attack President Bush for "banning stem cell research," while pro-life advocates lament a Republican administration and Congress that have banned nothing-not embryo destruction, not human cloning, not fetal farming, not genetic engineering. (eppc.org)
  • But we can only wonder about the ethical propriety of producing the first human child with this technique, knowing that the hoped-for newborn would be a reproductive experiment, one that may end initially in numerous fetal failures. (eppc.org)
  • Two commonly discussed types of human cloning are therapeutic cloning and reproductive cloning. (wikipedia.org)
  • Reproductive cloning would involve making an entire cloned human, instead of just specific cells or tissues. (wikipedia.org)
  • these are the "holy grail" that would be useful for therapeutic or reproductive cloning. (wikipedia.org)
  • … "human clone" means an embryo that, as a result of the manipulation of human reproductive material or an in vitro embryo, contains a diploid set of chromosomes obtained from a single - living or deceased - human being, fetus, or embryo. (hinxtongroup.org)
  • But what is not getting such wide reporting is the use of pluripotent stem cells (as well as many other types of cells and genetic engineering techniques) for reproductive purposes . (lifeissues.net)
  • 3. National regulations of governance of human cloning and embryo research in general adopted so far confirm the convergence of views of the refusal to adopt legislation or guidelines permitting reproductive cloning , while they still show variations on the legitimacy of human cloning carried out as part of research agendas. (lifeissues.net)
  • Reproductive Cloning - Use of a donor cell to create a new human genetically identical to the donor. (schlich.co.uk)
  • Assisted reproductive technology (ART) and embryo research have posed many challenges to the different timeframes of science, ethics and law. (edu.au)
  • and the general public debate about reproductive cloning. (edu.au)
  • Assisted reproductive techniques for canines: preservation of genetic material in domestic dogs [3] "Assisted reproductive techniques (ARTs), such as artificial insemination, in vitro fertilization, and cryopreservation of gametes/zygotes, have been developed to improve breeding and reproduction of livestock and for the treatment of human infertility. (edu.au)
  • This study aims to provide information to answer the following question: While some scientists claim they can indefinitely culture a stem cell line in vitro, what are the consequences of those culturing practices? (asu.edu)
  • Cells are collected from donor (a) and cultured in vitro (b). (biomedcentral.com)
  • The somatic cell and the oocyte is then fused (f) and the embryos is allowed to develop to a blastocyst in vitro (g). (biomedcentral.com)
  • In vitro studies indicate that Dab2 establishes epithelial cell polarity and organization by directing endocytic trafficking of membrane glycoproteins. (biomedcentral.com)
  • Independently of the gestational periods, the qualitative evaluation showed the initial wash-in phase from the first appearance of the uterine artery to the rapid distribution in embryonic vesicles or placenta to the progressive washout, whilst there was no enhancement of either embryos or fetuses in any bitch. (edu.au)
  • many are "totipotent" (as the abject fact of naturally occurring human identical twins makes clear). (lifeissues.net)
  • Scientists have applied somatic cell nuclear transfer to clone human and mammalian embryos as a means to produce stem cells for laboratory and medical use. (asu.edu)
  • Cloning by nuclear transfer using mammalian somatic cells has enormous potential application. (biomedcentral.com)
  • Induced pluripotent stem cells (iPSCs) are capable of unlimited self-renewal and can give rise to all three germ layers, thereby providing a new platform with which to study mammalian development and epigenetic reprogramming. (molcells.org)
  • Today, we can derive stem cells from a range of adult and newborn tissues: liver cells, kidney cells, brain cells, fat cells, and umbilical cord blood. (eppc.org)
  • Robert describes part-human animals, otherwise known as chimeras, as those resulting from the intentional combination of human and nonhuman cells, tissues, or organs at any stage of development. (asu.edu)
  • Stem cell technologies promise to be the next transformative medical technology offering therapies for conditions and diseases that are currently beyond medical science by creating replacement or supplementary tissues for a patient. (schlich.co.uk)
  • Therapeutic Cloning - Use of a donor cell to create pluripotent stem cells suitable for growing tissues for implantation into the donor or other patient. (schlich.co.uk)
  • reagents made using a patient's own cells used to regenerate disease or damaged tissues 14,15 , once the stuff of science fiction, may become science fact. (schlich.co.uk)
  • However, the mice were grossly normal when dab2 deletion was restricted to the embryo proper and the gene was retained in extraembryonic tissues using Meox2-Cre and Sox2-Cre. (biomedcentral.com)
  • Stem cells may be derived from adult tissues but the most potent are extracted from developing human embryos. (edu.au)
  • The possibilities of human cloning have raised controversies. (wikipedia.org)
  • In the article published in the journal Nature on 1 October 2005, the authors say they wrote the article to dispel misconceptions about what stem cells are, what they do, address some controversies surrounding stem cells, and discuss potential uses of stem cells. (asu.edu)
  • The ethical and legal controversies that were aroused in the ART debates during the 1980s have been re-ignited with the development of stem cell technology. (edu.au)
  • The holy grail of regenerative medicine-whatever one's ethical beliefs about destroying embryos-is to "reprogram" regular cells from one's own body so that individuals can be the source of their own rejection-proof therapies. (eppc.org)
  • Somatic cell nuclear transfer (SCNT) is a technology applied in cloning, stem cell research and regenerative medicine. (asu.edu)
  • The use of various types of stem cells for research purposes to make disease "models" in the lab for regenerative medicine and for "therapies" to cure sick patients for diseases is constantly in the news. (lifeissues.net)
  • In 2004 and 2005, Hwang Woo-suk, a professor at Seoul National University, published two separate articles in the journal Science claiming to have successfully harvested pluripotent, embryonic stem cells from a cloned human blastocyst using SCNT techniques. (wikipedia.org)
  • The embryos were developed only to the blastocyst stage, at which point they were studied in processes that destroyed them. (wikipedia.org)
  • Nor do only the cells of the inner cell mass of the blastocyst become the later adult and none of the cells from the inner cell mass become part of the placenta, umbilical cord, etc. (lifeissues.net)
  • In this regard, emerging technologies of chimeric human organ production via blastocyst complementation (BC) holds great promise. (frontiersin.org)
  • The blastocyst can then be transferred to a recipient (h) and cloned animals are born after completion of gestation (i). (biomedcentral.com)
  • The authors reviewed the biology of three types of pluripotent stem cells, embryonic stem cells, or ESCs, mesenchymal stem cells, or MSCs, and induced pluripotent stem cells, or iPS cells. (asu.edu)
  • The real experts to ask about the accurate scientific facts of human embryology are the scientific experts in human embryology who are academically credentialed Ph.D. human embryologists - not the "experts" in cell biology, genetics, doctors, nurses, theologians, lawyers or politicians, secretaries, news journalists, etc. (lifeissues.net)
  • It is quite possible that the advances in human biology in the remainder of the twentieth century will be remembered as the most significant scientific achievement of the animal species known as Homo sapiens . (lifeissues.net)
  • Somatic cell cloning (cloning or nuclear transfer) is a technique in which the nucleus (DNA) of a somatic cell is transferred into an enucleated metaphase-II oocyte for the generation of a new individual, genetically identical to the somatic cell donor (Figure 1 ). (biomedcentral.com)
  • A matured oocyte (c) is then enucleated (d) and a donor cell is transferred into the enucleated oocyte (e). (biomedcentral.com)
  • In 2015, biologist Helena D. Zomer and colleagues published the review article "Mesenchymal and Induced Pluripotent Stem Cells: General Insights and Clinical Perspectives" or "Mesenchymal and Induced Pluripotent Stem Cells" in Stem Cells and Cloning: Advances and Applications. (asu.edu)
  • Therapeutic cloning would involve cloning cells from a human for use in medicine and transplants. (wikipedia.org)
  • Two common methods of therapeutic cloning that are being researched are somatic-cell nuclear transfer and (more recently) pluripotent stem cell induction. (wikipedia.org)
  • But adult stem cells also raise some interesting ethical dilemmas alongside their great therapeutic promise. (eppc.org)
  • In particular, scientific developments in areas such as iPS cells open new possibilities of research and, at mid term, of therapeutic applications, but they also bring new ethical challenges and problems requiring further reflection and debate. (lifeissues.net)
  • The term is generally used to refer to artificial human cloning, which is the reproduction of human cells and tissue. (wikipedia.org)
  • Recording and contextualizing the science of embryos, development, and reproduction. (asu.edu)
  • But in order to become a part of medical history, parahuman reproduction and human genetic engineering must circumvent the recalcitrance of an antiquated culture. (lifeissues.net)
  • Human cloning is the creation of a genetically identical copy of a human. (wikipedia.org)
  • Induced Pluripotent Stem Cells (iPSCs) are cells derived from non-pluripotent cells, such as adult somatic cells, that are genetically manipulated so as to return to an undifferentiated, pluripotent state. (asu.edu)
  • Research on iPSCs, initiated by Shinya Yamanaka in 2006 and extended by James Thompson in 2007, has so far revealed the same properties as embryonic stem cells (ESCs), making their discovery potentially very beneficial for scientists and ethicists alike. (asu.edu)
  • However, iPSC generation may result in subtle epigenetic variations, such as the aberrant methylation of the Dlk1-Dio3 locus, among the clones, and this heterogeneity constitutes a major drawback to harnessing the full potential of iPSCs. (molcells.org)
  • Mouse embryonic fibroblast cells (MEFs) carrying an Oct4-GFP reporter were derived from day 13.5 embryos of the OG2 transgenic mouse strain and were cultured in Fibro Gro Low Serum (F.Gro) medium (Millipore). (molcells.org)
  • However, somatic cloning has been inefficient in all species in which live clones have been produced. (biomedcentral.com)
  • However, iPSC generation is a slow, inefficient process, and not all of the resulting iPSC clones are functionally equivalent. (molcells.org)
  • Another Nobel Laureate, James D. Watson, publicized the potential and the perils of cloning in his Atlantic Monthly essay, "Moving Toward the Clonal Man", in 1971. (wikipedia.org)
  • These moral perils are surely not a reason to oppose adult stem cell research, which deserves vigorous and expanded public support. (eppc.org)
  • These ethical concerns have prompted several nations to pass laws regarding human cloning. (wikipedia.org)
  • In his speech on "Biological Possibilities for the Human Species of the Next Ten Thousand Years" at the Ciba Foundation Symposium on Man and his Future in 1963, he said: It is extremely hopeful that some human cell lines can be grown on a medium of precisely known chemical composition. (wikipedia.org)
  • In the second half of the twentieth century, scientists learned how to clone organisms in some species of mammals. (asu.edu)
  • Because cattle are a species widely used for nuclear transfer studies, and more laboratories have succeeded in cloning cattle than any other specie, this review will be focused on somatic cell cloning of cattle. (biomedcentral.com)
  • With the cloning of a sheep known as Dolly in 1996 by somatic cell nuclear transfer (SCNT), the idea of human cloning became a hot debate topic. (wikipedia.org)
  • In January 2008, Dr. Andrew French and Samuel Wood of the biotechnology company Stemagen announced that they successfully created the first five mature human embryos using SCNT. (wikipedia.org)
  • In 2013, a group of scientists led by Shoukhrat Mitalipov published the first report of embryonic stem cells created using SCNT. (wikipedia.org)
  • In this experiment, the researchers developed a protocol for using SCNT in human cells, which differs slightly from the one used in other organisms. (wikipedia.org)
  • In July 2005, for example, scientists announced that they had engineered adult mouse stem cells into usable mouse eggs, a technique that might one day allow for the creation of human eggs from ordinary human cells. (eppc.org)
  • On the other hand, a chimera is defined as an organism in which cells from two or more different organisms have contributed. (frontiersin.org)
  • Although the possibility of cloning humans had been the subject of speculation for much of the 20th century, scientists and policymakers began to take the prospect seriously in 1969. (wikipedia.org)
  • In addition, the possibility of reprogramming adult stem cells back to a "pluripotent" (or embryonic-like) state raises the biological prospect of going back too far. (eppc.org)
  • Although the efficiency of nuclear transfer has been dramatically improved from the initial success rate of one live clone born from 277 embryo transfers [ 1 ], none of the aforementioned efforts abolished the common problems associated with nuclear transfer. (biomedcentral.com)
  • In 1964, authors James Till, Ernest McCulloch, and Louis Siminovitch, published A Stochastic Model of Stem Cell Proliferation, Based on The Growth of Spleen Colony-Forming Cells, which discussed possible mechanisms that control stem cell division. (asu.edu)
  • The first hybrid human clone was created in November 1998, by Advanced Cell Technology. (wikipedia.org)
  • However, though BC is emerging as a potential organ transplant option, challenges regarding organ size scalability, immune system incompatibilities, long-term maintenance, potential evolutionary distance, or unveiled mechanisms between donor and host cells remain. (frontiersin.org)
  • Various strategies have been employed to modify donor cells and the nuclear transfer procedure in attempts to improve the efficiency of nuclear transfer. (biomedcentral.com)
  • Most of these efforts are focused on donor cells. (biomedcentral.com)
  • Human enhancement, Harris argues, is a good thing--good morally, good for individuals, good as social policy, and good for a genetic heritage that needs serious improvement. (philpapers.org)
  • In a new preface, Harris offers a glimpse at the new science and technology to come, equipping readers with the knowledge to assess the ethics and policy dimensions of future forms of human enhancement. (philpapers.org)
  • This paper identifies human enhancement as one of the most significant areas of bioethical interest in the last twenty years. (philpapers.org)
  • Dynamics of male canine germ cell development [6] "Primordial germ cells (PGCs) are precursors of gametes that can generate new individuals throughout life in both males and females. (edu.au)
  • Citizens disagree about whether we should destroy human embryos for their stem cells-and if so, which embryos, with whose money, under what regulatory guidelines. (eppc.org)
  • This issue was considered by the House of Representatives Standing Committee on Legal and Constitutional Affairs in its report entitled Human Cloning: Scientific, Ethical and Regulatory Aspects of Human Cloning and Stem Cell Research (hereafter the Andrews Report , after the Chair of the Committee, Mr Kevin Andrews, MP) released in September 2001. (edu.au)
  • The report arose out of a recommendation for the Committee to review the report of the Australian Health Ethics Committee (AHEC) of the NHMRC entitled Scientific, Ethical and Regulatory Considerations Relevant to Cloning of Human Beings (hereafter the AHEC Report ). (edu.au)
  • In this article we examine embryonic stem cell research and explore the current regulatory framework associated with this research in Australia, with particular reference to the Andrews Report . (edu.au)
  • In Enhancing Evolution, leading bioethicist John Harris dismantles objections to genetic engineering, stem-cell research, designer babies, and cloning and makes an ethical case for biotechnology that is both forthright and rigorous. (philpapers.org)
  • But they are also less equipped to produce every cell type of the body and less able to reproduce themselves indefinitely, which makes them less appealing to scientists interested in basic research. (eppc.org)
  • Since 1995, Congress has annually reauthorized a law-called the "Dickey Amendment"-prohibiting federal funding for research "in which" embryos are destroyed while leaving embryo destruction in the private sector entirely unregulated. (eppc.org)
  • Before leaving office, President Clinton sought to get around the existing law without actually changing it, by funding research on embryonic stem cells so long as the actual embryo destruction was paid for with private dollars. (eppc.org)
  • An analysis of a cluster of articles from the Embryo Project Encyclopedia provides information to suggest possible solutions to some potential problems in cell culturing, recognition of benefits for existing or historical culturing practices, and identification of gaps in scientific knowledge that warrant further research. (asu.edu)
  • increased public sensitivity and awareness together with the development of national regulations of governance of human cloning and embryo research in general. (lifeissues.net)
  • An in-depth analysis aiming at re-defining this terminology according to the new developments in human embryo research would be highly beneficial . (lifeissues.net)
  • Embryonic stem cell technology is still at a preliminary research stage and announcements about its potential may be premature. (edu.au)
  • Experts from around the world are assessing the difficult issue of the extent to which embryonic stem cell research should be allowed to proceed, and to date there is little international consensus on this matter. (edu.au)
  • How, then, should embryonic stem cell research be regulated in Australia? (edu.au)
  • Over the past few years, the debate over stem cells and cloning has grown both more complex and more profound. (eppc.org)
  • XI - embryonic stem cells: embryonic cells that are capable of modifying the cells of any organism tissue. (hinxtongroup.org)
  • We now see a patent landscape where stem cell technologies and related therapies can, with very few exceptions, be protected via patents, provided the appropriate form of claim wording is used. (schlich.co.uk)
  • Somatic cells are cells that have gone through the differentiation process and are not germ cells. (asu.edu)
  • a nucleus was taken from a man's leg cell and inserted into a cow's egg from which the nucleus had been removed, and the hybrid cell was cultured and developed into an embryo. (wikipedia.org)
  • In this case, each embryo was created by taking a nucleus from a skin cell (donated by Wood and a colleague) and inserting it into a human egg from which the nucleus had been removed. (wikipedia.org)
  • In 2005, Ernest McCulloch and James Till published the article "Perspectives on the Properties of Stem Cells," which discusses the various properties and future possibilities for the use of stem cells. (asu.edu)
  • This would have been the first major breakthrough in human cloning. (wikipedia.org)
  • The unique properties of human stem cells have aroused considerable optimism about their potential as new pathways for alleviating human suffering caused by disease and injury. (edu.au)
  • Last May, the House of Representatives passed a bill to create a cord blood stem cell bank, legislation that is likely to become law with virtually unanimous support. (eppc.org)
  • But if we are to make wise policy the stem cell/cloning arena, we need to step back, sort out the various scientific alternatives and moral issues, and search for a way forward that all citizens can embrace. (eppc.org)
  • There, he reviews the scientific and ethical justifications and restrictions on creating part-human animals. (asu.edu)
  • All of these and similar supposed "scientific facts" of human embryology have long been formally rejected by the international nomenclature committee on human embryology. (lifeissues.net)
  • The authors wrote the article following their experiments with spleens of irradiated mice to demonstrate the existence of stem cells, had unknown properties. (asu.edu)
  • … "embryo" means a human organism during the first 56 days of its development following fertilization or creation, excluding any time during which its development has been suspended, and includes any cell derived from such an organism that is used for the purpose of creating a human being. (hinxtongroup.org)
  • Stem cells offer the prospect of treatments for diseases and injuries that are currently beyond medical science. (schlich.co.uk)
  • Experts disagree about the usefulness of the various cell types. (eppc.org)
  • Stem cells are unspecialized cells that can develop into several different cell types. (asu.edu)
  • Pluripotent stem cells are a special cell type that can give rise to other types of cells and are essential for development. (asu.edu)
  • Many nations outlawed it, while a few scientists promised to make a clone within the next few years. (wikipedia.org)
  • Long before the controversy emerged over human embryonic stem cells, scientists and doctors began using first-generation stem cells from adult bone marrow. (eppc.org)
  • But we need to proceed carefully, recognizing that we are gaining new powers over human origins even when we do not use human embryos, and recognizing the danger of blurring the line between cellular parts and embryonic wholes. (eppc.org)
  • To this end, we offer a detailed analysis of the stem cell/cloning question-where is the science, what are the political alternatives, and what moral obligations should guide us? (eppc.org)
  • Mall's collection soon became the most important repository of human embryos in the world and has ever since served as a "Bureau of Standards" for the science of human embryology. (lifeissues.net)
  • Stem cell technology is the latest development in this controversial branch of science. (edu.au)
  • The study of the new dab2 mutant allele in embryos and embryoid bodies confirms a role for Dab2 in extraembryonic endoderm development and epithelial organization. (biomedcentral.com)
  • Conditional deletion indicates that Dab2 is dispensable for organ development, when the vast majority of the embryonic cells are dab2 null. (biomedcentral.com)