Stem Cells
Dec 16, 2015
What did President Obama do regarding stem cell research?
• Obama opens up stem cell work, science inquiries
• Obama lifts the ban on funding of stem cell research
• What are stem cells?
• Unspecialized cells that have the potential to differentiate into many different kinds of cells
• What is a Stem Cell? (animation)
• YouTube - Stem Cells (7:52 minutes)
• Stem Cell Gold Rush - KQED QUEST Television Story (1019 minutes)
Why stem cells?
• 1. unspecialized (can become just about any kind of cell)
• 2. can keep dividing and renewing themselves for a long time
• DnaTube.com - Scientific Video Site - Division of stem cell (couple minutes)
What are the types of stem cells?
• What are some different types of stem cells? (animation)
Human Embryonic Stem Cells
• Isolated from inner mass of blastocysts
• (early embryo 4-5 days old)
• 50-100 cells
Where do they come from?
• In vitro fertilization clinics
• Egg and sperm create an embryo (8 weeks and under)
Frozen ESC
Adult Stem Cells
• Taken from adult (or children) tissue:– Umbilical cord blood– Bone marrow
– The adult tissues reported to contain stem cells include brain, bone marrow, peripheral blood, blood vessels, skeletal muscle, skin and liver.
Treatment Examples
• replacing the dopamine-producing cells in the brains of Parkinson's patients
• developing insulin-producing cells for type I diabetes
• repairing damaged heart muscle following a heart attack with cardiac muscle cells
PROS
• generate healthy heart muscle cells in the laboratory and then transplant those cells into patients with chronic heart disease.
• to form insulin-producing cells that eventually could be used in transplantation therapy for diabetics.
• Treat Parkinson’s disease
• Treat spinal and brain injuries
Potency
• Must be able to produce certain types of cells over a long time
POTENCY
• Totipotent
• Pluripotent
• Multipotent
• Unipotent
• Can differentiate into any embryonic cell
• Can differentiate into almost any kind of cell
• Can differentiate into only closely related cells
• Can form only one type of cell
Politics Involvement
• Since the arrival of the first "test tube" baby in 1978, the federal government has avoided funding any experiment that either creates or destroys a human embryo.
What if you need it?
• After Michael J. Fox acquired Parkinson’s disease, he became a proponent for stem cell research.
• When Pres. Regan had Alzheimer’s Nancy
Regan fought for stem cell research.
• Should frozen embryos created through in vitro fertilization be used to create stem cells? Why or why not?
• Do embryonic stem cells represent a human life?
• Should there be laws to regulate stem cell research?
• Should the government provide funding for embryonic stem cell research?