Mar 15, · Stem cell research would deviate efforts from other health strategies. It is difficult to tell in advance what type of research will give rise to what type of benefit. The fundamental research from which stem cell technology originated came from studies in developmental biology whose utility Disclaimer: Please Thesis Stem Cell Research Paper note that all kinds of custom written papers ordered from blogger.com academic writing service, including, but not limited to, essays, research papers, dissertations, book reviews, should be used as reference material only. Therefore, when citing Thesis Stem Cell Research Paper a paper you get from us in your own work, it should be Stem cell opinion essay @ theme of power macbeth essay | an argumentative essays & Write essay on kabaddi. Ratings. 90 % (30) Stem cell opinion essay @ theme of power macbeth essay | an argumentative essays; Education system in the republic of uzbekistan essay
Free essays stem cell research
Skip navigation. Stem cells are undifferentiated cells that are capable of dividing for long periods of time and can give rise to specialized cells under particular conditions. Embryonic stem cells are a particular type of stem cell derived from embryos. Between stem cell essays and the eighth week of stem cell essaysthe embryo undergoes multiple cell divisions.
At the stem cell essays stage, stem cell essays, roughly the third day of division, all eight cells are considered totipotent, which means the cell has the capability of becoming a fully developed human being. By day four, cells begin to separate and form a spherical layer which eventually becomes the placenta and tissue that support the development of the future fetus.
A mass of about thirty cells, called the inner cell massforms at one end of the sphere and eventually becomes the body. When the sphere and inner cell mass are fully formed, around day 5, the pre- implantation embryo is referred to as a blastocyst.
At this point the cells in the inner cell mass have not yet differentiated, but have the ability to develop into any specialized cell type that makes up the body. This property is known as pluripotency. As ofembryonic stem cells refer to pluripotent cells that are generally derived from the inner cell mass of blastocysts. In Novembertwo independent publications announced the first successful isolation and culture of pluripotent human stem cells.
While working at the Wisconsin National Primate Research Centerlocated at the University of Wisconsin-Madison, James A. Thomson and his team of researchers cultured human embryonic stem cells from the inner cell mass of donated embryos originally produced for in vitro fertilization.
The characteristics of the cultured cells were consistent with previously identified features in animal stem cells. They were capable of long-term self-renewal and thus could remain undifferentiated for long periods of time; they had particular surface markers; and they were able to maintain a normal and stable karyotype.
Since the three germ layers precede differentiation into all the cell types in the body, this observation suggested that the cultured cells were pluripotent. Soon afterwards, a research team led by John D. The paper detailed the process stem cell essays which pluripotent stem cells were derived from gonadal ridges and mesenteries extracted from aborted five-to-nine week old human embryos. Despite coming from different sources, according to NIH, the resultant cells seem to be the same.
The largest source of blastocysts for stem cell research comes from in vitro fertilization IVF clinics. Used for reproductive purposes, stem cell essays, IVF usually produces an abundance of viable blastocysts. Excess blastocysts are sometimes donated for research purposes after obtaining informed consent from donors. Another potential method for producing embryonic stem cells is stem cell essays cell nuclear transfer SCNT. This has been successfully done stem cell essays animal cells.
The nucleus of a differentiated adult cell, such as a skin cell, is removed and fused with an enucleated eggan egg with the nucleus removed.
The eggnow containing the genetic material from the skin stem cell essays, is believed to be totipotent and eventually develops into a blastocyst. As of mid, attempts to produce human embryonic stem cells using SCNT have been unsuccessful. Nonetheless, scientists continue to pursue this method because of the medical and scientific implications of embryonic stem cells lines with an identical genetic makeup to particular patients.
One problem faced in tissue transplants is immune rejection, where the host body attacks the introduced tissue. Recent discoveries in cultivating human embryonic stem cells may potentially lead to major advancements in understanding human embryogenesis and medical treatments.
Previously, limitations in access and environmental control have stunted research initiatives aimed at mapping out the developmental process. Insights into differentiation factors may lead to treatments into such areas as birth defects. In theory adult stem stem cell essays can also be cultivated for such purposes, but isolating and identifying adult stem cells has been difficult and the prospects for treatment are more limited than using embryonic stem cells.
Despite the potential benefits that may come about through human embryonic stem cell researchnot everyone in the public embraces it, stem cell essays.
Several ethical debates surround this newly developing research field. Much of the debate stems from differing opinions on how we should view embryos: is an embryo a person? Should an embryo be considered property? Ethical concerns in embryonic stem cell research include destroying human blastocysts, laws surrounding informed consentand particularly for SCNT, misapplication of techniques for reproductive cloning, stem cell essays. The public debate continues, advancing along with the changes in the field.
As ofpublic opinion polls showed that majority of religious and non-religious Americans now support embryonic stem cell researchbut opinions remain divided over whether it is legitimate to create or use human blastocysts solely for research.
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Human Embryonic Stem Cells By: Ke Wu. Keywords: Stem cellsDifferentiationHuman development. Human Embryonic Stem Cells Stem cells are undifferentiated cells that are capable of dividing for long periods of time and can give rise to specialized cells under particular conditions.
Sources Maienschein, Jane. Whose View of Life? Cambridge, MA: Harvard University Press Stem Cell Basics. Bethesda, MD: National Institutes of HealthUS Department of Health and Human Services. Understanding Stem Cells: An Overview of the Science and Issues from the National Academies. National Academy of SciencesNational Academy of Engineering, Institute of Medicine, and the National Research Council, stem cell essays.
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Disclaimer: Please Thesis Stem Cell Research Paper note that all kinds of custom written papers ordered from blogger.com academic writing service, including, but not limited to, essays, research papers, dissertations, book reviews, should be used as reference material only. Therefore, when citing Thesis Stem Cell Research Paper a paper you get from us in your own work, it should be the order immediately. We evaluate the performance of each writer and it is why we Emerging Roles For Hippocampal Adult Neural Stem Cells In Memory (Colloquium Series On Stem Cell Biology)|Daniela Kaufer are the best in the market. All of our writers are retired Mar 15, · Stem cell research would deviate efforts from other health strategies. It is difficult to tell in advance what type of research will give rise to what type of benefit. The fundamental research from which stem cell technology originated came from studies in developmental biology whose utility
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