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Ethics of Stem Cell Research Danielle Priestley John Nebbia Huy Lam Kihyun Lee
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Overview of Stem Cells Cell from the body with ability to reproduce into many other cells Unspecialized Creates over 200 cell types Divisions of a stem cell can become a stem cell or a specialized cell Replace old cells to repair parts of body Can divide all the time or situationally Can be found all over the body
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https://www.youtube.com/watch?v=K7D6iA7bZG0 https://www.youtube.com/watch?v=K7D6iA7bZG0
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Types of Stem Cells Embryonic 5-14 day embryo Cells are able to differentiate into ectoderm, mesoderm, and endoderm Hematopoietic Cord blood, fetal tissues, bone marrow, Adult stem cells Able to produce many cell types and self-renew over a lifetime Neural Adult stem cells Limited or no capacity of self-renewal
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Growing Cells in a Lab Cell are cultured Must make sure they are, in fact, remaining stem cells Can take months Research in directed differentiation. Harnessing the potential of stem cells by constraining differentiation in vitro toward tissues of interest Variation of Medium If cells are clumped they will differentiate spontaneously Making a mass of cells (teratoma)
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Stem Cell Concerns Passing of viruses or other microscopic agents Transplant drugs to clear immune system Diseases from animals Nutrients for stem cells are derived from animals which could carry diseases Usually cultivated in laboratory Uncontrolled growth Leads to more of a concern with embryonic cells because they grow quickly and that it could result in tumors. Misdirected growth Differentiating into wrong type of tissue
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How Stem Cells Can Be Used Determine how development occurs in the body New medications Transplants Growing organs for people in need Type 1 diabetes (cells that produce insulin) Cancer and birth defects: can they be avoided? Cell division Differentiation
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How can stem cells be used Known to have helped people with over 70 different diseases Different results with different stem cells Adult stem cells Embryonic stem cells
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Transplants Grow cells in the lab from stem cells Control them to differentiate into certain cell Compatibility testing Proper functioning in new body for rest of life No harm to new body vs. Rejection of tissue
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Stem Cells and Heart Disease One of largest causes of death is Heart Diseases Heart doesn’t get oxygen -> heart cells die -> bad things happen Stem cells can replace dead heart cells Currently being tested on animals More research is needed before human trials begin
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Ethical Issues Living or not “who or what” Pre-implantation embryos Is it right to make these embryos on purpose only for the stem cells? Where are the restrictions drawn? Spares from IVF Intentional creation Are you taking a potential life?
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Ethical Issues Embryos would be discarded anyways if not used for stem cells May have a purpose and not discarded Some don’t see a problem with making stem cells No one is harmed Turning life into a money game If you are rich you can buy a new body part Future
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Social Issues Feminists think that women are being used “therapeutic cloning” Genetically identical to individual offering stem cells Think that therapeutic cloning will eventually lead to reproductive cloning (slippery slopes effect) Religion: killing something that could become a living person Therapeutic cloning: imitating the creation of life When does life start? Catholic Church believes in life begins at conception
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Pope John Paul II wrote in his 1995 encyclical, The Gospel of Life, that “Human embryos obtained in vitro are human beings and are subjects with rights; their dignity and right to life must be respected from the first moment of their existence” Social Issues
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Political Issues Primary question was whether the federal government should fund research or not In 2001, Senator Barrack Obama of Illinois voted for legislation that would have allowed federal funding for stem cell research using embryos slated to be discarded from fertility clinics. President Bush vetoed the bill Can be used for some lines that were already working Limited numbers Law protecting embryos so they aren’t destroyed No law protecting pre-embryos (younger than 14 days)
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In 2009, President Barrack Obama lifts restriction ban on stem cell research Polls indicated that people today have a better outlook and support on the research. More than half favored stem cell research than finding a method of preserving the embryos. "We are committed to pursuing stem cell research quite responsibly, but we recognize there are a range of beliefs on this.“ –White House domestic policy adviser Political Issues
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Work Cited http://stemcells.nih.gov/info/basics/pages/basics1.aspx https://www.youtube.com/watch?v=K7D6iA7bZG0 https://www.youtube.com/watch?v=K7D6iA7bZG0 http://www.explorestemcells.co.uk/concernsaboutstemcells.html http://humrep.oxfordjournals.org/content/18/4/672.full http://www.focusonthefamily.com/socialissues/life-issues/stem-cell-research/stem-cell- research-issue http://www.icr.org/article/ten-problems-with-embryonic-stem-cell-research/ http://www.icr.org/article/ten-problems-with-embryonic-stem-cell-research/ http://www.pewforum.org/2008/07/17/stem-cell-research-at-the-crossroads-of-religion- and-politics/?beta=true&utm_expid=53098246-2.Lly4CFSVQG2lphsg- KopIg.1&utm_referrer=https%3A%2F%2Fwww.google.com%2F http://www.pewforum.org/2008/07/17/stem-cell-research-at-the-crossroads-of-religion- and-politics/?beta=true&utm_expid=53098246-2.Lly4CFSVQG2lphsg- KopIg.1&utm_referrer=https%3A%2F%2Fwww.google.com%2F http://www.usnews.com/news/blogs/god-and-country/2009/03/09/the-politics-behind- obamas-embryonic-stem-cell-research-decision
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