stem cells
Before giving this assignment to work on I was 100 percent against stem cells research. But due to extension research I found out that stem cells can provide us with a myriad of possibilities in medical technology, but not without bringing with it serious moral and ethical dilemmas. For the sake of our children and their children after them, it is imperative that we resolve these current issues in genetics. In this research paper I will give the definition of stem cell, the current techniques in stem cells research, and how it would benefit the medical field. Stem cell is a general term used to identify any cell that has the ability to divide indefinitely and to differentiate into other specific cell types when properly stimulated. This differentiative and proliferative capability is due to the unrestricted state of the activation of gene expression. The complete genome of any mammalian cell has on the other of 105 genes that may or may not be expressed. Depending on the selection and sequence of these genes or gene products, the cell can give rise to any cell type. Generally, genes can be activated and inactivated leading to different cellular phenotypes. These
Nevertheless, the field is far too new to restrict research to only one line of study. If future research is successful, these cells will develop into functioning tissues and organs in almost limitless amounts, as well as have the ability to repair and rebuild someone's immune system. The rejection problem could be circumvented if a person's own cells were harvested, or better yet transplants would not be needed if these endogenous stem cells could be stimulated into repairing the damage tissue. This sphere has an outer layer and an inner layer of cells that will eventually become the placental tissues and the fetal tissues respectively. One of these cells has the ability to divide into any of the various blood cell types found in the circulation. directed activations and inactivations are what led the stem cells to its terminal cellular type. In both cases,informed consent must be given before these samples are obtained. One of these sources involves the harvest of the inner cell mass of human embryos donated from in vitro fertilization clinics. In contracts, the second source is isolated stem cells from fetal tissue obtained from terminated pregnancies. Stem cells derived from human embryos or fetal tissuse would be genetically different than the recipient's and therefore would likely be rejected. Although this research may prove to be extremely beneficial in treating and curing many common diseases, it will likely be years until their full usefulness is revealed? There is currently a ban in the United states on receiving federal funding for research which involve human embryonic stem cells? Because these projects are extremely expensive, not many private companies can afford to perform large-scale human studies. This entails the removal and/or retrieval of the stem cells from the source or host followed by in vitro culture using artificial conditions and growth nutrients. The study was able to demonstrate that transgenic re-integrated neural cells transferred to bone marrow in mice was able to re-differentiate into hematopoietic cell lines. One example of this type of system are blood stem cells found in the bone marrow. In mammalian cell biology is zygote.
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