• eggs
  • Creating embryos from animal eggs and human DNA is a "reproductive perversion", the Linacre Centre for Healthcare Ethics has warned. (indcatholicnews.com)
  • In 2003, scientists at Cambridge University, U.K. conducted experiments involving fusing the nucleus of a human cell into frog eggs. (scienceblogs.com)
  • In 2003, Hui Zhen Sheng of Shanghai Second Medical University, China, announced that rabbit-human embryos had been created by fusing human cells with rabbit eggs stripped of their chromosomes. (scienceblogs.com)
  • If the goal of provisions (B) and (C) is to prevent the creation of bovine/humans or canine/humans by interspecies mixing of sperm and eggs, they are superfluous since fertilization between species that widely separated by evolution is highly unlikely. (reason.com)
  • Provisions (D) and (E) would outlaw experiments in which researchers have already tried to produce stem cell lines using enucleated animal eggs into which human cell nuclei have been installed. (reason.com)
  • So far as I can tell, given their scarcity, no one has tried to install animal nuclei into enucleated human eggs. (reason.com)
  • Provision (F) is very much like Provisions (B) and (C) since the most likely to way to combine human haploid cells with animal haploid cells to produce a diploid embryo would be to combine animal and human eggs and sperm. (reason.com)
  • diploid
  • For the purpose of this report, generating an individual animal or person that derives its nuclear genes from a diploid cell taken from an embryo, fetus, or born individual of the same species. (chipbennett.net)
  • macaques
  • While they succeeded in obtaining cloned macaques, the numbers are too low to make many conclusions, except that it remains a very inefficient and hazardous procedure," said Robin Lovell-Badge, an embryologist and head of the Division of Stem Cell Biology and Developmental Genetics at the Francis Crick Institute. (thesouthern.com)
  • therapeutic
  • Therapeutic cloning would involve cloning cells from a human for use in medicine and transplants, and is an active area of research, but is not in medical practice anywhere in the world, as of April 2017[update]. (wikipedia.org)
  • cell
  • It is a technique for cloning in which the nucleus of a somatic cell is transferred to the cytoplasm of an enucleated egg. (wikipedia.org)
  • Somatic cell nuclear transplantation has become a focus of study in stem cell research. (wikipedia.org)
  • Somatic cell nuclear transfer involves removing the nucleus of an egg cell. (natcath.org)
  • Some Catholic leaders, activists in the pro-life movement, and legislators oppose embryonic stem cell research, while others believe certain forms of the research present morally acceptable means of achieving long-sought medical gains. (natcath.org)
  • The embryos developed to the approximately 100-cell stage that forms after about four days of development. (scienceblogs.com)
  • Sir John Gurdon used nuclear transplantation and cloning to show that the nucleus of a differentiated somatic cell retains the totipotency necessary to form a whole organism. (biologists.org)
  • Since our introduction to Dolly the sheep in the 1990s, it seems somewhat logical that a whole organism can be made from the nucleus of a mature somatic cell. (biologists.org)
  • They have lost the ability to differentiate to all cell types needed for a complete embryo development, but they still have the potential to differentiate to any other cell type (up to day 14th post-fertilization). (orthodoxwiki.org)
  • The technique involved transplanting the nucleus from an undifferentiated cell of one sheep into the egg of another sheep from which nucleus had been removed. (hubpages.com)
  • The resulting egg cell was tricked into acting like an embryo, dividing and becoming all the differentiated cells of a new individual. (hubpages.com)
  • The researchers remove the egg's nucleus -- the part of the cell that contains most of its genetic information-- and replace it with the nucleus from another cell. (thesouthern.com)
  • Around the world, researchers and politicians have struggled to develop guidelines that will allow for ethical and socially responsible stem cell research. (spusa.org)
  • The inner cell mass is extracted from the embryo and cultured in a nutrient rich environment in a Petri dish in order to create stem cell lines. (spusa.org)
  • Posts in this category pertain to abortion, human cloning, embryonic stem cell research, and other issues pertaining to the advancement of the culture of life and to the respect and protection of the sanctity of life. (chipbennett.net)
  • The measure specifically bans human cloning, but would permit all federally allowed stem cell research in the state. (chipbennett.net)
  • In cattle, when individual cells from 4- and 8-cell embryos and implanted in different foster mothers, they can develop normally into calves and this technique has been used routinely within cattle breeding schemes for over 10 years. (chipbennett.net)
  • 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 2000, the NIH, under the administration of President Bill Clinton, issued "guidelines that allow federal funding of embryonic stem-cell research. (wikipedia.org)
  • No federal law ever did ban stem cell research in the United States, but only placed restrictions on funding and use, under Congress's power to spend. (wikipedia.org)
  • In February 2001, George W. Bush requested a review of the NIH's guidelines, and after a policy discussion within his circle of supporters, implemented a policy in August of that year to limit the number of embryonic stem cell lines that could be used for research. (wikipedia.org)
  • In April 2004, 206 members of Congress, including many moderate Republicans, signed a letter urging President Bush to expand federal funding of embryonic stem cell research beyond what Bush had already supported. (wikipedia.org)
  • On July 29, 2005, Senate Majority Leader William H. Frist (R-TN), announced that he too favored loosening restrictions on federal funding of embryonic stem cell research. (wikipedia.org)
  • On July 18, 2006, the Senate passed three different bills concerning stem cell research. (wikipedia.org)
  • In the first one, first messenger cross through the cell membrane, binding and activating intracellular receptors localized at nucleus or cytosol, which then act as transcriptional factors regulating directly gene expression. (wikipedia.org)
  • Not all stem cell research involves the human embryos. (wikipedia.org)
  • Is it just to destroy an embryo cell if it has the potential to cure countless numbers of patients? (wikipedia.org)
  • Current research directions include determining the exact mechanism of the disease, improving animal models to aid with research, testing of medications to treat symptoms or slow the progression of the disease, and studying procedures such as stem cell therapy with the goal of repairing damage caused by the disease. (wikipedia.org)
  • This functional heterogeneity among cancer cells has led to the creation of multiple propagation models to account for heterogeneity and differences in tumor-regenerative capacity: the cancer stem cell (CSC) and stochastic model. (wikipedia.org)
  • cells
  • The team used two enzymes to erase the epigenetic memory of the transferred nuclei of being somatic cells. (wikipedia.org)
  • Panayiotis Zavos, the operator of a U.S. fertility laboratory, reported in 2003 that he had created around 200 cow-human hybrid embryos that lived for about two weeks and grew to several hundred cells in size, beyond the stage at which cells showed the first signs of developing into tissues and organs. (scienceblogs.com)
  • Pre-implantation embryos at this stage of development are called blastocysts, hollow microscopic balls of cells. (spusa.org)
  • An important part of this research would be the identification of how and why undifferentiated cells become differentiated. (spusa.org)
  • As the aforementioned procedures are of particularly low efficiency, there is a need to identify the cells that have been successfully transfected with the vector construct containing the desired insertion sequence in the required orientation. (wikipedia.org)
  • However, since they must be derived from early human embryos their production and use in research has been a hotly debated topic as the emt introduce new cells into adult bodies for possible treatment of cancer, diabetes, neurological disorders and other medical conditions. (wikipedia.org)
  • However, the use of the technique on human embryos led to more widespread controversy as criticism of the technique now began from the wider non-scientific public who debated the moral ethics of questions concerning research involving human embryonic cells. (wikipedia.org)
  • Political leaders are debating how to regulate and fund research studies that involve the techniques used to remove the embryo cells. (wikipedia.org)
  • experiments
  • In his paper "Versuche über Pflanzenhybriden" ("Experiments on Plant Hybridization"), presented in 1865 to the Naturforschender Verein (Society for Research in Nature) in Brünn, Mendel traced the inheritance patterns of certain traits in pea plants and described them mathematically. (wikipedia.org)
  • In research GMOs are used to study gene function and expression through loss of function, gain of function, tracking and expression experiments. (wikipedia.org)
  • transplant
  • Provision (A) might prohibit research that aims at the creation of human organs in other animals suitable for transplant in human patients such as the work already done by Esmail Zanjani at the University of Nevada Reno. (reason.com)
  • This was important, because if you transplant a nucleus and get a normal animal out of it, you really want to prove beyond doubt that the animal has come from the transplanted nucleus and not from the resident egg nucleus, which, occasionally, might not have been removed. (biologists.org)
  • primate
  • She is the first "cloned" primate by artificial twinning, which is a much less complex procedure than the DNA transfer used for the creation of Zhong Zhong and Hua Hua. (wikipedia.org)
  • So if that's what Brownback and Landrieu are really worried about they should advocate banning primate/human brain chimeras and leave the other research alone. (reason.com)
  • abortion
  • On 16th April the first 3 pages of the Independent were dedicated to the story that so many doctors are now refusing to perform abortions that the NHS are facing an 'abortion crisis' as there are not enough doctors to meet the high demand for abortion procedures. (christianconcern.com)
  • Business and medical leaders strongly support the measure while religious and anti-abortion leaders have campaigned against it, saying the procedure amounts to human cloning . (chipbennett.net)
  • mouse
  • This paved the way for Mario Capecchi, Martin Evans, and Oliver Smithies to create the first knockout mouse, ushering in a whole new era of research on human disease. (wikipedia.org)