introduction of stem cell...
TRANSCRIPT
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INTRODUCTION OF STEM
CELL TECHNOLOGY
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Stem Cell – Definition
• A cell that has the ability to continuously divide and differentiate (develop) into various other kind(s) of cells/tissues
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Stem Cell Characteristics
‘Blank cells’ (unspecialized)
Capable of dividing and renewing
themselves for long periods of time
(proliferation and renewal)
Have the potential to give rise to
specialized cell types (differentiation)
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Kinds of Stem Cells
Stem cell
type Description Examples
Totipotent Each cell can develop
into a new individual
Cells from early
(1-3 days)
embryos
Pluripotent Cells can form any (over
200) cell types
Some cells of
blastocyst (5 to 14
days)
Multipotent
Cells differentiated, but
can form a number of
other tissues
Fetal tissue, cord
blood, and adult
stem cells
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Dr. Hariom Yadav
Stem Cell Differentiation
Princeton University
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Kinds of Stem Cells
Embryonic stem cells come from a five to six-day-old embryo. They
have the ability to form virtually any type of cell found in the human
body.
Embryonic germ cells are derived from the part of a human embryo or
foetus that will ultimately produce eggs or sperm (gametes).
Adult stem cells are undifferentiated cells found among specialised or
differentiated cells in a tissue or organ after birth. Based on current
research they appear to have a more restricted ability to produce
different cell types and to self-renew.
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Blastocyst Diagram
Princeton University
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Derivation and Use of
Embryonic Stem Cell Lines
Isolate inner cell mass (destroys embryo)
Day 5-6 Blastocyst
Inner cells (forms fetus)
Outer cells (forms placenta)
Heart repaired
Culture cells
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10/6/2014 Dr. Hariom Yadav
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Dr. Hariom Yadav
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10/6/2014 Dr. Hariom Yadav
Adult stem cells
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Dr. Hariom Yadav
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Deterministic model of
hematopoiesis
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Applications
Disease
• Diabetes, Spinal
cord injury,
Parkinson’s
disease, heart
disease
Genetic based
Disease
• Cystic fibrosis,
Huntington’s
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10/6/2014 Dr. Hariom Yadav
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10/6/2014 Dr. Hariom Yadav
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10/6/2014 Dr. Hariom Yadav
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10/6/2014 Dr. Hariom Yadav
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10/6/2014 Dr. Hariom Yadav
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10/6/2014 Dr. Hariom Yadav
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10/6/2014 Dr. Hariom Yadav
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