Trevecca Nazarene, SCI 2600

Excerpt: ... Issues in Science Stem Cell Notes 1. All stem cells are: a. capable of dividing and replicating themselves over long periods of time (proliferation) b. unspecialized in the sense that they do not perform a specific function other than replication and production of other cells c. capable of giving rise to other cell types such as muscle cells, nerve cells and blood cells (differentiation). Some types of stem cells may be able to produce only a specific cell type d. The types of stem cells are: Totipotent -Can become an entire human being. Pluripotent -Can develop into any body cell. Multipotent -Thought only to differentiate into cells of same tissue type. 2. Embryonic Stem Cells a. Embryonic stem cells are derived from embryos (fertilized eggs) that are fertilized outside of the mother's body. Up to this point, "left over" embryos from the in vitro fertilization process are used as the source for this research. b. Embryonic stem cells are removed after the embryo is allowed to mature to 4-5 days old. During t ...

JMU, ISAT 350

Excerpt: ... EmbryonicStemCellsQuestionsforReview Yournames:ThankstoAmber,Janine,PaulandDerekformany oftheseanswers.Ialsousedideasfrommanyofyouranswersto questions10and11. astrocytes(helpercellsinthebrain) 2. Whatisablastocyst?Ablastocystisastageinembryonicdevel ...

Tennessee, ENG 335

Excerpt: ... possess unlimited application in the treatment and cure of many diseases such as Alzheimer's, diabetes, cancer, strokes, etc. By conducting further research, doctors and scientists hope to unveil medical breakthroughs. Hypothetically speaking, with the right amount of medical research, diseases now thought to be incurable could cease to be a notorious problem. The possibility of finding a cure for cancer instills scientists with excitement; however, this process is dramatically without the assistance of government funding. Currently, the excitement is not internalized by the pro-life supporters because they have not seen enough evidence to believe that this hypothetical situation could actually occur. 2 Stem cells are categorized into two groups: embryonic stem cells and adult stem cells. Scientifically speaking, an embryonic stem cell is a primitive type of cell that can be coaxed into developing into most of the 220 types of cells found in the human body (Robinson). According to Robinson some researche ...

Michigan State University, WRA 110

Excerpt: ... alized cell types. iii. Changing the Way We Develop and Test Drugs for Safety 1. Researchers could study the beneficial and toxic effects of new medications on human pluripotent stem cells that have been developed to mimic the disease process. iv. The Advantages of Pluripotent Stem Cells 1. Human embryonic stem cells can turn into most of the tissue types in the body, with the potential to cure many diseases. v. Alternatives at a Lower Cost? 1. We must determine whether there are alternatives to obtaining stem cells from blastocysts, such as from adult cells, that would similar benefits at a lower cost. vi. Blastocysts Are Not Persons 1. The human embryos used (usually 5-7 days after fertilization) are not humans; they are human cells. vii. Extra Embryos During In Vitro Fertilization (IVF) 1. Many INF users want the embryos they still have in storage to be used in stem cell research, as it would be more meaningful for them to be used in research than to have them defrost and die on a lab bench. viii. Pote ...

West Point, EN 101

Excerpt: ... ells with different specific functions. Currently, there are several stem cells found to be more compatible than others, such as adult, embryonic, and umbilical chord stem cells. Research suggests embryonic stem cells are more capable of transforming into a broad variety of cells. However, the research using these cells involves the experimentation and destruction of human embryos and potential human lives. This clearly creates an object of public debate and controversy. Besides the public controversy, embryonic stem cells have failed to live up to their successful names. They were claimed to be the blank slate of all cells, capable of replicating themselves into 220 types of cells, including blood, bone, organs, and nerves. The cells were deemed far more effective than adult or any other type of stem cell. However, their discovery occurred ten years ago, and since then, there has not been a reliable record of success. Researchers have yet to prove that human stem cells will, in fact, work. It has only be ...

NJIT, BIO 102

Excerpt: ... lls make them unique from other cells and offer treatment to limitless injuries and diseases. People who need new cells for their hearts after a severe heart attack can do so using stem cells as well as the never cells in the spinal cord. The two types of stem cells adult and embryonic allow for different specialization. "Adult stem cells typically generate the cell types of the tissue in which they reside. A blood-forming adult stem cell in the bone marrow, for example, normally gives rise to the many types of blood cells such as red blood cells, white blood cells and platelets" (Stem cell information) Adult stem cells are only possible for a person's own body and not for transplants. Embryonic stem cells are derived from embryos that develop from eggs that have been fertilized in vitro, in an in vitro fertilization clinic-and then donated for research purposes with informed consent of the donors. "The embryos from which human embryonic stem cells are derived are typically four or five days old and are ...

Michigan, COLLOQUIUM 07

Excerpt: ... Stem cells, both embryonic and tissue/adult stem cells, offer tremendous, largely untapped, potential to replace cells and tissues lost via injury, disease or normal aging. To be considered a "stem cell", a cell must exhibit two basic properties: self-renewal, and multilineage differentiation potential (pluripotency). Prior to the availability of embryonic stem cells (ESC), scientists relied on cell lines developed from germ cell tumors as models to study lineage-specific differentiation of pluripotent cells. Derivation of mouse embryonic stem cells in 1981 (the basis of the 2007 Nobel prize in medicine), primordial germ cells, and in 1998 human embryonic stem cells has set the stage to use these cells in regenerative medicine, and offers the potential to understand early human development, as well as less obvious research in pharmaceutical development and drug testing. In 2001, President Bush allowed the NIH to fund research using human ESC, but limited funding to the lines in existence at that time. Althoug ...

Allan Hancock College, ANAT 2300

Excerpt: ... Rietze et al. The Walter and Eliza Hall Institute of Medical Research purified NSCs from the adult mouse brain by flow cytometry, and directly examined the cells' properties Nature. 2001 Aug 16;412(6848):736-9. Stem Cells Dr Mark Hill, 2004 Slide 22 Current research on stem cells How to: Isolate Grow Maintain, store Differentiate Therapeutic uses Stem Cells Dr Mark Hill, 2004 Slide 23 Growth of Embryonic Stem Cells Mouse blastocyst-derived ES cell line D3 from American Type Culture Collection (ATCC) Undifferentiated ES cells maintained on gelatin-coated dishes (earlier studies, feeder layer) DMEM (dulbeccos modified essential media) supplemented with 2 mM glutamine (essential amino acid) 0.001% beta-mercaptoethanol (reducing agent) 1x nonessential amino acids (amino acids for growth) 10% donor horse serum (source of growth factors etc) human recombinant leukemia inhibitory factor (LIF) 2,000 units/ml Stem Cells ...

Murray State KY, ENG 101

Excerpt: ... Whitby 1 Sarah Whitby Professor Carter Eng 101-46 6 December 2007 One Life to Save Another When does life start? Is it when the sperm and the egg meet or could it be when the cells start to get the appearance of a tiny human being? Is it ok to create life in a lab if it could save lives, give hope, and improve the life of many suffering people that are living with diseases? There are no simple yes or no answers to any of these questions; it's all up to the viewpoint of each individual person. Stem cell research is necessary to provide a way to better the lives of the human race today and in the future. There is a conflict on embryonic stem cell research. One side says embryonic stem cell research is immortal and unnecessary. In the United States, there is a debate over whether stem cells from adults can be as effective in treating diseases as those from embryos. Based on ethical grounds the White House, which opposes the use of human embryonic stem cells , argues that the use of embryonic stem cells is unne ...

Michigan State University, PSL 432

Excerpt: ... e: Telomeres are replicated by telomerase, which is a reverse transcriptase, not DNA polymerase. All the other foils are true statements about telomeres. 3, 27, 9 Embryonic stem cells differ from adult stem cells in that only embryonic stem cells A. are 'immortal' with respect to cell division. B. can self-renew indefinitely. C. can produce descendents that are differentiated. D. can be safely transplanted directly into a host. E. are derived from cells cultured from a blastocyst.@ Rationale: Both embryonic and adult stem cells fulfill the definition of stem cells, and are thus immortal with respect to cell division, which is another way of saying they can self-renew indefinitely. Only adult stem cells can be safely transplants directly into a host, embryonic stem cells produce a teratoma. As several slides showed in both lecture 1 and lecture 3, embryonic stem cells are typically derived from the inner cell mass of the blastocyst. 4, 28, 6 Based on the assigned reading and lecture notes on apoptosis, which of ...

Bryn Mawr, BROWNBAG 0506

Excerpt: ... r. Hall was appointed permanent president of the new institute last month and is responsible for its scientific direction, subject to a 29-member governing board of scientists, patients' advocates and public officials. In October, he convened a two-day conference of leading stem cell scientists to advise him on the best research strategy. Perhaps his most formidable problem is that the public's hopes for immediate success run high, but scientists at the conference warned that many basic problems with human embryonic stem cells remained to be solved - a sign that no therapeutic use of the cells is likely for years. Underlining that caution, few companies are in the cell therapy field and venture capitalists have shown little interest, some speakers complained. Because of the pressure for quick progress, several scientists urged Dr. Hall to focus on the "low hanging fruit," meaning research with the adult stem cells like the blood-forming cells of the bone marrow. Bone marrow transplantation has been developed ...