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本帖最后由 细胞海洋 于 2011-7-29 23:42 编辑
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干细胞研究的百科全书，不敢独享~stem cell? We have a basic working definition,2 M) u$ w3 q# K1 T6 Y
but the way we observe a stem cell function$ c: p- P% `# T: u
in a dish may not represent how it functions in aliving organism. Only this is clear: Stem cells are
3 ?8 y) V8 c% f8 {% ^the engine room of multicelluar organisms for both- f/ C1 k. `+ B k5 s# i" k
plants and animals. They live in cave-like “niches,”# g; a$ L$ G! d6 V
surrounded by intricate signals that allow them to
2 }; }* Y# Y2 u! z! R$ {# Bdivide—either to make more of themselves (selfrenew),
% z2 \6 C. h) f: Aor to produce a progeny that can go on. I' h. h4 r) ?1 @. N
to make a specific type of tissue. They can often
) X* F; E" R. c4 @% g& Qbe plucked from this environment and placed in
2 C) i4 t" ^" o' j7 wa nutrient broth at body temperature and encouraged6 l" W0 ^0 @% b' d# z
to divide, although the niche is generally lost
& `6 @5 ?( o% jand their characteristics often change., p" s( Z/ J# v8 V5 o+ m+ B
& ~- X" E4 `. ]! v( O3 n
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发表于 2011-7-29 14:34
发表于 2011-7-29 23:41
发表于 2011-8-1 11:18
