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Embryonic Stem Cells and Cloning PowerPoint Presentation

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Published on : Jan 08, 2015
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NOTES – Embryonic Stem Cells and Cloning

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What are stem cells? Embryonic Stem Cells – cells present in the early stages of an embryo’s development that have the ability to change in any type of body cell

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What are the goals of stem cell research? Stem cell research is about repairing and/or replacing damaged body tissues in order to reverse some effects of aging, disease, and injury In the lab, scientists have seen embryonic stem cells change into the cells of virtually every part of the human body Scientists want the ability to control the development of these cells so they can make the types of tissue they need, like brain, heart, nerve, or muscle

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Stem Cells in the Lab

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The Potential of Stem Cells Stem cells can be used to generate cells and tissues that could be used for cell-based therapies Cell-based therapies —Treatment in which stem cells are changed into the specific cell type required to repair damaged or destroyed cells or tissues Donated organs and tissues are often used to replace damaged or destroyed tissue, but the need for transplantable tissues and organs far outweighs the available supply Stem cells changed into specific cell types, offer the possibility of a renewable source of replacement cells and tissues to treat many diseases (Parkinson's and Alzheimer's diseases, spinal cord injury, stroke, burns, heart disease, diabetes, osteoarthritis, and rheumatoid arthritis)

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The Potential of Stem Cells It may become possible to generate healthy heart muscle cells in the laboratory and then transplant those cells into patients with chronic heart disease. Research in mice and other animals indicates that stem cells transplanted into a damaged heart can generate heart muscle cells and successfully repopulate the heart tissue

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Mouse

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The Potential of Stem Cells In people who suffer from type I diabetes, the cells of the pancreas that normally produce insulin are destroyed by the patient's own immune system New studies indicate that it may be possible to change human embryonic stem cells to insulin-producing cells that eventually could be used in transplantation therapy for diabetics

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Where do embryonic stem cells come from? Embryonic stem cells must be taken from the earliest stage of the embryo, called the blastocyst 5 to 7 days after fertilization, the blastocyst is ball of about 100 stem cells There are two ways to produce blastocysts from which stem cells can be taken: fertilization of egg with sperm or cloning

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Where do embryonic stem cells come from?

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Where do embryonic stem cells come from?

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Where do embryonic stem cells come from?

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Where do embryonic stem cells come from?

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Where do embryonic stem cells come from?

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Where do embryonic stem cells come from?

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Blastocyst

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What is cloning?

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What is cloning? Cloning – making a genetic copy of an existing organism There are 2 types of cloning: Reproductive Cloning – cloning in order to produce a genetic copy of an existing organism Therapeutic Cloning – cloning in order to produce a blastocyst from which stem cells can be taken and used to develop therapies for injury and disease

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