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Essay of stem cell research
Essay of stem cell research
Essay of stem cell research
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Joseph Winkelmann Mr. Sargent English 250 16 December 2013 Stem Cells Although stem cell research is a hot topic in politics and the scientific field as of late, it dates back to the 1950s. Stem cells are undifferentiated cells that can become any cell, such as but not limited to skin cells or brain cells. These cells are some of the first cells in the human body. Not only do they divide and form new cells rapidly in the embryonic stage, they can form any specialized cell in the human body, a process called differentiation. They can also form new stem cells, a process called self-renewal (Staff). Although the fear of unethical human cloning is present, the study of stem cells is necessary because it can improve society by testing new medications for safety and effectiveness, and by finding the cure of potentially fatal diseases, such as cancer. Stem cells can only be acquired from a few places. Embryonic stem cells are formed in the embryo just a few days after fertilization. By this point, there are about one hundred cells; this is called a blastocyst. Of those one hundred cells, ten to twenty are unspecialized stem cells (“Embryonic Stem Cells...”). These stem cells, known as pluripotent cells, can make every type of cell in the human body. The blastocyst is the only place that pluripotent cells can be found in the body. The long term goal of true embryonic pluripotent cells is to be used to repair diseased tissue; however; at this point in stem cell research, embryonic stem cells are being used for research purposes, specifically to determine how diseases originate and progress in the human body (Staff). Another type of stem cells is adult stem cells. Found in small quantities, these cells are located in the bone... ... middle of paper ... ...and cost over $6 million,” (“Product Development...”). Cutting out even one fourth or one third of drug and toxicity testing on animals would lead to multi-million dollar savings. There would also be savings in terms of energy and resources dedicated to studying experiments that result potentially irrelevant and dangerous results. Stem cell research is ethical and requires deeper experimentation. From increasing the safety of medicine to developing treatments that cure diseases, stem cells are the key to success. Stem cells can also be used to determine how diseases and injuries progress and affect certain cells within the body. Furthermore, using stem cells for research purposes will save money by cutting out some if not all animal testing, provide safer and better medications, as well as allow the allocation of saved resources to other research endeavors.
Stem cells are the building blocks of the human body. Embryos consist of unspecialized stem cells that transform into the various specialized cells in the body such as cardiac, muscle or bone cells. Fetuses also have stem cells. However, the stem cells are divided into types like muscle, bone or nerves and don't perform a specialized function. Surprisingly, adult bodies also contain stem cells. In adults, stem cells are undifferentiated but limited to specific tissue type. When needed, the stem cells transform into the cells needed for repair and maintenance. The most common source of adult stem cells is bone marrow. Researchers also acquire stem cells from umbilical cords. Without stem cells, embryos could not develop into fetuses and adult
The cells unique nature has scientists intrigued to do research with the focus of finding a way that these cells can be used to replace patients’ injured or diseased tissues. Advancement is made to all the three types of stem cells namely embryonic stem cells, adult stem cells in addition to induced pluripotent cells. Embryonic cells are the building blocks of an embryo that is developing, and can develop into almost all body cell types. Somatic cells are found in the body tissues. They renew and regenerate in healthy bodies. The third type which is induced pluripotent is genetically modified embryo cells from skin cells.2 Research on these cells are geared towards saving humanity; a noble course.
Stem cells mostly live in the bone marrow (the spongy center of certain bones), where they
Stem cells are pluripotent cells of the body which are “undifferentiated.” This means that stem cells can ultimately give rise to any type of body tissue. Thus stem cells have the potential to cure a vast number of diseases and physical ailments including Parkinson’s, diabetes, spinal cord injury, and heart disease. Consequently, stem cell research and the development of associated medical applications are of great interest to the scientific and medical community. The area of stem cell research involving human embryonic stem cells is of particular interest in that embryonic stem cells are derived from week-old blastocysts developed from in vitro fertilized eggs. As opposed to adult stem cells, which must undergo a complicated process of de-differen...
Because stem cells are essentially a blank slate, scientists are theoretically capable of growing any human tissue cell. There is enormous medical potential in this. Stem cell research is the next step in advancing the medical field. It is comparable to the discovery of penicillin or the inoculation for smallpox.
Stem cell research began in 1956 when Dr. E Donnall Thomas performed the first bone marrow transplant (“Adult stem cells are not more promising,” 2007). Since that time, research has evolved into obtaining cells from a variety of tissues. According to stem cell research professors, Ariff Bongso and Eng Hin Lee (2005), “Stem cells are unspecialized cells in the human body that are capable of becoming cells, each with new specialized functions” (p. 2). Stem cells are in various adult tissues, such as bone marrow, the liver, the epidermis layer of skin, the central nervous system, and eyes. They are also in other sources, such as fetuses, umbilical cords, placentas, embryos, and induced pluripotent stem cells (iPSCs), which are cells from adult tissues that have been reprogrammed to pluripotency. Most stem cells offer multipotent cells, which are sparse...
Embryonic stem cells are derived from a four or five day old human embryo that is in the blastocyst phase of development (see figure 5). The embryo’s that are used for stem cell research, are extra’s that have been created in IVF clinics (in vitro fertilization), that are no longer needed. Embryonic stem cells are totipotent (cells with the potential to develop into any cells in the body). Scientists have discovered an alternative to embryonic stem cells, these cells ...
Stem Cells are cells that scientist have began to try and use to help people. “In the mid 1800s it was discovered that cells were basically the building blocks of life and that some cells had the ability to produce other cells.” With the discovery of stem cells came the opening to a new area of development in what could be done with health and medicine of the world. Of course throughout history, stem cells have been a very heated subject between different groups of people who believe it is right or wrong. Some people believe that this form of research is against ethical or moral values. They too see this as being wrong because they view human embryos as a form of life. These cells are neutral cells that can be turned into any other one that is needed at the time. Stem cells can make more of themselves when they aren’t being used allowing them to be ready when something happens. In the human body, stem cells help repair the tissue that has been broken, torn, or lost. They help fix bones, heal abrasions, and even repair internal organs if needed. Scientist have the ability now to mani...
There are many different types of stem cells that are being looked at for research. These include embryonic stem cells, adult stem cells, and induced pluripotent cells. Embryonic stem cells are cells that have the potential to produce many different cells in the body. They are cells that are tak...
Stem cell research is on the forefront of regenerative medicine and biological science. It is the study of certain cells in the inner mass of the embryo that are produced a few days after the embryo forms during the blastocyst stage. They are the most primitive of all human cells. They are undifferentiated cells, which mean the cells are not designated to be any special type of cell, such as a nerve, muscle, or skin cell. The cell's specialization is later influenced by the molecules, which are usually proteins that surround the cell (Marshak 220-223). The proteins are typically produced by the mother, but under certain laboratory conditions, distinctive proteins can be introduced and a definite, mature cell type is produced. The cells that are produced could be implanted into a subject to replace worn out cells, or cells that have been destroyed due to disease or injury.
Those who favour stem cell research are optimistic about the continued developments in stem cell research will open doors to many breakthrough discoveries in biomedical science. The scientific and ethical questions arise as rapidly as the reaching of milestones in stem cell research. There are two main types of stem cells, namely embryonic stem cells and adult stem cells. Adult stem cells are undifferentiated cells in our body. But they have restricted-range of cells that they can further differentiate. On the contrary, embryonic stem cells have the ability to differentiate into nearly two hundred cell types in the human body, called pluripotency. The process of harvesting embryonic stem cells involves destruction of embryos (Mooney, 2009).
Could you imagine being able to create new organs, tissues, muscles, and even food? With embryonic stem cell technology, believe it or not, these things are possible. Stem cells are the body's raw materials. Specifically, they are cells from which all other cells with specialized functions are generated. Under the right conditions in the body or in a laboratory, stem cells can divide to form more cells called daughter cells. These daughter cells either become new stem cells or turn into specialized cells with a more specific function, such as blood cells, brain cells, muscle cells or bone cells. The possibilities are almost endless. The debate and main issue with this technology is that the actual stem cells come from embryos. Embryos are an unborn or unhatched offspring in the process of development. Although there is controversy surrounding these cells, embryonic stem cells should continue to be researched and used, because they have so much potential.
For decades, biologists have been using stem cells to figure out possible cures for different diseases and even prevent them. Stem cells are cells that can become useable in certain tissues in the body (according to an infant), or tissue cells that are already found in blood, bones, the brain, and skin (in adults or children). Stem cells are being used for patients with lymphoma (begins in the immune system), leukemia (cancer of white blood cells), and other types of blood disorders.
Stem cells offer exciting promise for future therapies, but significant technical hurdles remain that will only be overcome through years of intensive research. Stem Cells have the incredible potential to develop into many different cell types in the body during early life and growth. Scientists primarily work with two kinds of stem cells from animals and humans. The embryonic stem cells and the non-embryonic stem cells. Stem cells are the cells from which all other cells originate. In a human embryo, a large portion of the embryo’s cells are stem cells. These stem cells can be used for cell-based therapies. Cell-Based therapies are treatments in which stem cells are induced to differentiate into the specific cell type required to repair damaged or destroyed cells or tissues. Stem cells are versatile and offer the possibility to treat a number of diseases including Alzheimer’s, stroke, cardiovascular disease, diabetes, etc. The problem is that for the process of embryonic stem cell research and embryo will be destroyed if used. This raises a moral issue and questions of whether stem cell research is unethical or not.
Not only do we have other options for these tests, but animals testing has actually been proven to be ineffective. Companies claim that this sort of cruelty will benefit the human population by testing the “safety” of the products, as they have been for hundreds of years and although this may have been helpful in the past, scientists have discovered otherwise. “While funding for animal experimentation and the number of animals tested on continues to increase, the United States still ranks 49th in the world in life expectancy and second worst in infant mortality in the developed world” (“Animal Testing Is”). This evidence shows that while we still continue to support and spend money on animal testing, it is not working as well as we thought.Essentially we are torturing the animals for a negative outcome, both for the human and the animal. The Food and Drug Administration reports that “92 out of every 100 drugs that pass animal tests fail in humans” (“Top Five Reasons”). If the products and drugs that we are testing on the animals are not working then there is no use in harming a harmless animal for them. Some may disagree and say that animal testing has enabled us to develop many life saving treatments for both humans and animals. But in reality there has been more cons then pros in animal testing. For example, “Animal tests on the arthritis drug Vioxx showed that it had a protective effect on the hearts of mice, yet the drug went on to cause more than 27,000 heart attacks and sudden cardiac deaths before being pulled from the market” (Should Animals Be). While animal testing has enabled us to create great products it is usually ineffective on humans and leads to animals being harmed for no