...approaches have been doing widely and kept increasing at accelerated pace. A lot of research areas had emerged for that purpose including one of the most fascinating and highly active areas at present, stem cells therapies. Due to self-renewal property and differentiation capability of stem cell, it becomes a new hope in modern treatment. The first successful case of stem cell therapy in human was reported in 1959. Bone marrow restorations were observed in leukemia patients who received total body irradiation subsequent by intravenous injection of their twins’ bone marrow (Thomas et al, 1957). Nevertheless, that effect was transient and the following bone marrow transplantation attempts in non-twin patients and donors can eventually lead to patient’s death from graft-versus-host disease (Mathé et al, 1965). During that time, the safety of hematopoietic cells transplantation was not guaranteed because of the limited knowledge in human histocompatibility and immunosuppression. However, the turning point came after the discovery of human leucocyte antigen (HLA) groups (Dausset, 1958; van Rood et al, 1958), HLA typing and compatibility testing were performed prior to the transplantation. In addition, the improvement of immunosuppressive protocol also helps bringing the bone marrow transplantation to become more and more successful (Donnall and Hutchinson, 1999). Although the success rate of hematopoietic stem cell therapy was great, patients’ mortality still happened as a result of some factors...
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...have been doing widely and kept increasing at accelerated pace. A lot of research areas had emerged for that purpose including one of the most fascinating and highly active areas at present, stem cells therapies. Due to self-renewal property and differentiation capability of stem cell, it becomes a new hope in modern treatment. The first successful case of stem cell therapy in human was reported in 1959. Bone marrow restorations were observed in leukemia patients who received total body irradiation subsequent by intravenous injection of their twins’ bone marrow (Thomas et al, 1957). Nevertheless, that effect was transient and the following bone marrow transplantation attempts in non-twin patients and donors can eventually lead to patient’s death from graft-versus-host disease (Mathé et al, 1965). During that time, the safety of hematopoietic cells transplantation was not guaranteed because of the limited knowledge in human histocompatibility and immunosuppression. However, the turning point came after the discovery of human leucocyte antigen (HLA) groups (Dausset, 1958; van Rood et al, 1958), HLA typing and compatibility testing were performed prior to the transplantation. In addition, the improvement of immunosuppressive protocol also helps bringing the bone marrow transplantation to become more and more successful (Donnall and Hutchinson, 1999). Although the success rate of hematopoietic stem cell therapy was great, patients’ mortality still happened as a result of some...
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... Stem cell therapy Irfan manzoor. Roll no: RP7002B22. Reg. no: 11000225. Course: Bsc. Biotech 1. Lovely professional university Contents 1. Stem cells and properties. 2-3 2. Stem cell therapy. 5-12 3. Stem cell use in animals 13-15 4. Recent researches in stem cell therapy 16-19 5. Conclusion 21 6. Bibliography 22 Stem cells Stem cells are cells found in all multi cellular organisms. They are characterized by the ability to renew themselves through mitotic cell division and differentiate into a diverse range of specialized cell types. Research in the stem cell field grew out of findings by Ernest A. McCulloch and James E. Till at the University of Toronto in the 1960s. The two broad types of mammalian stem cells are: embryonic stem cells that are isolated from the inner cell mass of blastocysts, and adult stem cells that are found in adult tissues. In a developing embryo, stem cells can differentiate...
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...Introduction Human embryonic stem cells (hES cells) are currently discussed not only by the biologists by whom they were discovered but also by the medical profession, media, ethicists, governments and politicians. There are several reasons for this. On the one hand, these ‘super cells’ have a major clinical potential in tissue repair, with their proponents believing that they represent the future relief or cure of a wide range of common disabilities; replacement of defective cells in a patient by transplantation of hES cell‐derived equivalents would restore normal function. On the other hand, the use of hES cells is highly controversial because they are derived from human pre‐implantation embryos. To date, most embryos used for the establishment of hES cell lines have been spare embryos from IVF, but the creation of embryos specifically for deriving hES cells is also under discussion. The most controversial variant of this is the transfer of a somatic cell‐nucleus from a patient to an enucleated oocyte (unfertilized egg) in order to produce hES cells genetically identical to that patient for ‘autologous’ transplantation (so‐called ‘therapeutic’ cloning); this may prevent tissue rejection. The question ‘Can these cells be isolated and used and, if so, under what conditions and restrictions’ is presently high on the political and ethical agenda, with policies and legislation being formulated in many countries to regulate their derivation. The UK has been the first to pass...
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...Stem cells are cells with the potential to develop into many different types of cells in the body. They serve as a repair system for the body. Stem cells are cells found in all multi cellular organisms. Stem Cells have the potential to make a large positive impact in the medical field. It is important to know the basics of Stem Cells, the difference between the types of Stem Cells, and the possible uses of Stem Cells. Knowing the basics of stem cells is a necessity to understanding how they might positively impact those with a medical condition. Stem cells are master or parent cells of the body. Stem cells are unspecialized cells. They have special properties: unspecialized cell and the ability to self-renew as a stem cell or transform into another type of cell with a specialized function. The human body has over two hundreds different types of cells. The stem cell has the potential to replace about all of them. Stem cells are considered unique compared to mature cells which are lack of their capabilities. Stem cells have the remarkable potential to develop into many different types of cell in the human body. Spinal cord injury results in neuronal degeneration and demyelination due to oligodendrocyte apoptosis at the region of trauma and causes severe functional impairment of motor and sensory pathways (All, 2012). With the right conditions in the human body or a laboratory, the stem cells divide to form more cells, or daughter cells. These daughter cells either become new...
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...Cord Stem Cells to Improve Stem Cell Research Stem cells are intriguing. They are so dynamic, so puzzling, and they contain many of biology’s deepest mysteries. Generally, cellular stemness is characterized by a cell’s self-renewal and potency, the ability to differentiate into specific cell types. In reality though, the science of stem cells goes beyond these distinctions. From studying human development to creating new therapeutic alternatives for diseases, embryonic stem cell (ESC) research promises numerous benefits as it has progressed extensively in the past decade. But because of the ethical issues surrounding the destruction of human embryos, other alternatives have had to be found. So far, adult stem cells (ASCs) have been used for therapeutic purposes such as bone marrow transplants. However, donor DNA-matching has been an enduring problem with this approach. A few years ago, Shinya Yamanaka discovered induced pluripotent stem cells (iPSCs), which derives pluripotent stem cells from somatic cells, thereby overcoming both ethical and donormatching issues. Although iPSC presents much promise, the newness of this technology makes it inadequate for immediate use. Now, newer discoveries have been made. Aside from ESCs, ASCs, and iPSCs, stem cells have also been found in postnatal tissue, particularly in the umbilical cord. These umbilical cordderived stem cells have been proposed to treat illnesses ranging from Parkinsonism to leukemia in both animal models and humans alike...
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...days is stem cell transplantation. Until recently, moral issues of states and countries haven't allowed research to expound deeply into the unknowns. Within the last ten years though, scientists have made leaps and bounds in finding out concrete facts that this stem cell research has supplied. New ways of conducting stem cell research have made the healing and repairing treatment for many diverse applications. To prove their point, scientists have broken down the basic facts of their studies throughout the last ten years. Embryonic stem cell transplantation is a related course of cells that are in charge of certain functions and systems of the body. The cells used in the transplantation process are contrived from "cryopreserved suspensions" from the fetal liver, thymus, bone marrow, spleen, brain, and the pancreas. Introducing these cells to the body can be approached in different ways. The first step taken is engrafting or multiplying cells in the affected area. These cells will then supplement missing or declining cells and replace/repair missing functions of the body. Production then commences with considerable amounts of biologically active substances such as nerve growth factor, tumor necrosis factor and interleukins etc. When these cells have been transplanted, they are capable of migrating, establishing intercellular links and responding to various effects. However, because of their immature transplantation to the human body, these...
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...One of the most popular clinical studies being researched these days is stem cell transplantation. Until recently, moral issues of states and countries haven't allowed research to expound deeply into the unknowns. Within the last ten years though, scientists have made leaps and bounds in finding out concrete facts that this stem cell research has supplied. Tommy G. Thompson, Secretary of Health Services states, "I believe it will open up a world of opportunity for scientists, not only at the NIH, but elsewhere, because it demonstrates a cooperative atmosphere among academia, the private sector, and government that will allow us to move ahead" ("sign stem"1). New ways of conducting stem cell research have made the healing and repairing treatment for many diverse applications. To prove their point, scientists have broken down the basic facts of their studies throughout the last ten years. Embryonic stem cell transplantation is a related course of cells that are in charge of certain functions and systems of the body. The cells used in the transplantation process are contrived from "cryopreserved suspensions" from the fetal liver, thymus, bone marrow, spleen, brain, and the pancreas. Introducing these cells to the body can be approached in different ways. The first step taken is engrafting or multiplying cells in the affected area. These cells will then supplement missing or declining cells and replace/repair missing functions of the body. Production then commences with considerable...
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...Karren Mrs. Robertson English 5A 12 December 2012 Human Therapeutic Cloning Should Be Permitted Human therapeutic cloning has the ability to greatly improve the quality of life. Cloning could be the answer to the end of your pain and suffering, but before you can understand it’s benefits, you have to know the process therapeutic cloning itself. Therapeutic cloning is a procedure in which cells, typically skin cells, are taken from a patient and inserted into a fertilized egg whose nucleus has been removed. Scientists then extract stem cells from the egg, and use those cells to grow tissue that are a perfect genetic match to the patient. It is a break-through in science and the key to curing many diseases including Parkinson's and Alzheimer's disease. Elizabeth Foley explains why human cloning should not be banned due to, “the primary objections to human cloning appear to be unfounded, based more on morality, theology, and fear than objective data.” The potential medical benefits of genetic engineering are far too great to let moral concerns about embryonic cell use get in the way of curing diseases. Human therapeutic cloning should not be banned from society because countless lives can be saved through transplantations and genetic research. Therapeutic cloning is the cloning of human tissues for research and transplant, and shows much promise in organ transplantation. Much needed organs grown from stem cells from the patient’s own genetic material could help solve...
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...Stem cell research is one that is widely debated amongst various religions, cultures, and political groups. The question as to when life actually begins is the epicenter of this worldwide quarrel, and may not be settled for some time. Although this may be true, one fact that cannot be denied is that stem cell research has led to many life saving discoveries in various sectors of scientific research. In regards to the ethical dilemma of stem cells, recent developments in induced pluripotent stem cells (iPSCs) have made it possible to explore the applications of stem cells while avoiding the ethical problems associated with embryonic stem cell research (Seki & Fekuda, 2015). One intriguing area in stem cell research is the potential applications for them in the treatment of cardiac diseases. Studies have explored the potential uses for stem cells for the treatment of heart disease (Yamakawa & Ieda, 2015). Additionally, stem cells have been explored for the treatment of heart failure and myocardial infarction (Rasmussen, et al., 2013). Stem cells and how they may be used for the treatment of various cardiac diseases is an exciting topic and has the potential to change future approaches to the treatment. This paper will examine the applications and significance of stem cells in relation to these common cardiac pathologies. Heart disease is one of the leading causes of death in developed countries and currently there are few effective treatment options available (Yamakawa & Ieda...
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...its protein product, which can then be purified and used for biochemical experimentation. Cloned genes can also be used for DNA sequencing, which is the determination of the precise order of all the base pairs in the gene. All of these applications require many copies of the DNA molecule that is being studied. Gene cloning also enables scientists to manipulate and study genes in isolation from the organism they came from. This allows researchers to conduct many experiments that would be impossible without cloned genes. For research on humans, this is clearly a major advantage, as direct experimentation on humans has many technical, financial, and ethical limitations. Importance for Medicine and Industry The ability to clone a gene is not only valuable for conducting biological research. Many important pharmaceutical drugs and industrial enzymes are produced from cloned genes. For example, insulin, clotting factors, human growth hormone, cytokines (cell growth stimulants), and several anticancer drugs in use are produced from cloned genes. Before the advent of gene cloning, these proteins had to be purified from their natural tissue sources, a difficult, expensive, and inefficient process. Using recombinant methods, biomedical companies can prepare these...
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...Scientific research has come a long way since the first use of human embryos to treat and prevent diseases. The polio vaccine was invented in the 1950’s from the use of human fetal kidney cells, fetuses in uteri were used to develop techniques like amniocenteses and improving knowledge about congenital heart disease in the 1970’s, and in the 1980’s the transplantation of fetal tissue into adults to help with serious conditions like, diabetes or Parkinson’s (Gold, 2004). While there has always been concern and controversy over the use of human embryonic cells, today the debate is ethical. This ethical debate lies within the destruction of human embryos in order to use them for medical research. This paper will talk about how two different theories; utilitarianism and relativism view this ethical issue and the problem it presents, as well as my personal views on use of embryonic stem cell research. The theory of utilitarianism determines what is best by looking at the results of an act. According to Mosser (2010, section 1.7), “utilitarianism argues that, given a set of choices, the act we should choose is that which produces the best results for the greatest number affected by that choice.” When looking at the use of embryonic stem cells for research, utilitarianism looks at the end result. Embryonic stem cells have the potential to save lives by curing diseases and through the use of transplantation. While some utilitarianism’s may still view the destruction of these cells as the...
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...SBI4U ISP Part II: Genetic Technology Research Paper Embryonic Stem Cell Use Abstract: Researchers discovered that embryonic stem cells could be originated from early human embryos. This discovery has raised a series of ethical and public-policy questions that are now being confronted by multiple international organizations, nations, cultures, and religious traditions. This essay surveys policies for human embryonic stem cell research in four regions of the world, reports on the recent debate at the United Nations about one type of such research, and reviews the positions that various religious traditions have adopted regarding this novel type of research. In several instances the religious traditions seem to have influenced the public-policy debates. There are many ways in which human stem cells can be used in research and the clinic. Studies of the medical use of Embyonic Stem cells will yield information about the complex events that occur during human development. A primary goal of this work is to identify how undifferentiated stem cells become the differentiated cells that form the tissues and organs. Scientists know that turning genes on and off is central to this process. Some of the most serious medical conditions, such as cancer and birth defects, are due to abnormal cell division and differentiation. A more complete understanding of the genetic and molecular controls of these processes may yield information about how such diseases arise and suggest new strategies...
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...Recent advances in human stem cell research have not only generated enormous enthusiasm on the part of researchers and optimistic predictions of revolutionary advances in biomedicine, but have also sparked considerable ethical and emotional public debate. There has been much controversy in the press about pros and cons of stem cell research . The important question to think about is Why the prospect of stem cell therapy has been greeted not as an innovation to be welcomed but as a threat to be resisted? The enormous capabilities of stem cells announce the beginning of an extraordinary advanced field of medicine that can help to cure deadly diseases . The present method , however, destroys human blastocyst that gives rise to intense controversy. (Monroe, Miller, & Tobis , 2008, p. 1) Stem cell controversy is the ethical debate centered on research involving the creation, usage and destruction of human embryonic stem cells. Around the world, many people believe that human embryo research , including the deliberate creation of embryos for valid research or clinical purposes , is wrong . Due to the controversy , some people argues that we should allow stem cell research but some of them are not in favour of stem cell research . According to S Holm , the author of Going to the Roots of Stem Cell Controversy, “A stem cell is a non – differentiated cell that can divide and multiply in its undifferentiated state, but which can also give rise to more specialized...
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... what are stem cells? Stem cells have the remarkable ability to possibly develop into numerous different cell types in the body, not only during the early stages of life but throughout the growth of the body as well. Along with that, stem cells can serve as an internal repair system in certain body tissues. A unique factor of stem cells is that when they divide each newly formed cell can potentially reform into a new type of specialized cell such as a muscle cell, a red blood cell, etc. By doing this, the body can become stronger or gain back important cells that it has lost. Another unique characteristic of stem cells is that under certain physiological conditions they can be induced a tissue or organ specified cell with special...
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