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Embryonic stem cells of the inner cell mass are pluripotent, meaning they are able to differentiate to generate primitive ectoderm, which ultimately differentiates during gastrulation into all derivatives of the three primary germ layers: ectoderm, endoderm, and mesoderm.
Opposition to the use of human embryonic stem cells in research is often based on philosophical, moral, or religious objections. [24] There is other stem cell research that does not involve the destruction of a human embryo, and such research involves adult stem cells, amniotic stem cells, and induced pluripotent stem cells.
Stem cell therapy is the use of stem cells to treat or prevent a disease or condition. Bone marrow transplant is a form of stem cell therapy that has been used for many years because it has proven to be effective in clinical trials.
In May 2005, the House of Representatives voted 238–194 to loosen the limitations on federally funded embryonic stem-cell research – by allowing government-funded research on surplus frozen embryos from in vitro fertilization clinics to be used for stem cell research with the permission of donors – despite Bush's promise to veto the bill ...
Much of the research central to embryonic stem cell differentiation and morphogenesis is derived from studies in developmental biology and mammalian embryogenesis. [15] For example, immediately after the blastocyst stage of development (from which ESCs are derived), the embryo undergoes differentiation, whereby cell specification of the inner ...
A stem cell line is a group of stem cells that is cultured in vitro and can be propagated indefinitely. Stem cell lines are derived from either animal or human tissues and come from one of three sources: embryonic stem cells, adult stem cells, or induced pluripotent stem cells. They are commonly used in research and regenerative medicine.
As opposed to mesenchymal stem cells, embryonic-like stem cells are not abundant in the amniotic fluid, making up less than 1% of amniocentesis samples. Embryonic-like stem cells were originally identified using markers common to embryonic stem cells such as nuclear Oct4, CD34, vimentin, alkaline phosphatase, stem cell factor and c-Kit. However ...
The FDA approved a phase I clinical trial with ViaCyte beta cells derived from human embryonic stem cell for the treatment of diabetes in August 2014. [15] The cells will be delivered in immunoprotective capsules and pre-clinical results in animal models showed remission of symptoms within a few months. [16]
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