有篇外文文章涉及诱导方案,要者就顶:Chromatin remodeling agent trichostatin A: a key-factor in the hepatic differentiation of human mesenchymal stem cells derived of adult bone marrow。6 J- Q) i0 Y' {% _/ `( \# R: d
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Abstract+ H4 E7 @0 N! U7 ^8 ?
Background: The capability of human mesenchymal stem cells (hMSC) derived of adult bone " c4 n# {- v" f! ~3 K# _marrow to undergo in vitro hepatic differentiation was investigated. % h1 u; V7 I: J6 LResults: Exposure of hMSC to a cocktail of hepatogenic factors [(fibroblast growth factor-4 (FGF- 3 m/ y* J+ E7 S4), hepatocyte growth factor (HGF), insulin-transferrin-sodium-selenite (ITS) and dexamethasone)] ( `& n3 s; o8 i2 ?) Z H6 g. @: kfailed to induce hepatic differentiation. Sequential exposure to these factors (FGF-4, followed by" z" `( ~ [4 ^ C' R
HGF, followed by HGF+ITS+dexamethasone), however, resembling the order of secretion during 1 n. I- F2 u. n" `7 r& r4 Y2 r+ vliver embryogenesis, induced both glycogen-storage and cytokeratin (CK)18 expression. Additional - x+ l% T/ u; A0 o d, Fexposure of the cells to trichostatin A (TSA) considerably improved endodermal differentiation, as3 g' y/ d0 L9 g1 J* A& k9 z
evidenced by acquisition of an epithelial morphology, chronological expression of hepatic proteins, ' [3 |' v% T/ y. [+ Yincluding hepatocyte-nuclear factor (HNF)-3β, alpha-fetoprotein (AFP), CK18, albumin (AL, 9 y: M1 Z1 @, C* rHNF1α, multidrug resistance-associated protein (MRP)2 and CCAAT-enhancer binding protein6 S# }0 z J0 I5 G* v% k
(C/EBP)α, and functional maturation, i.e. upregulated ALB secretion, urea production and inducible , ]* l5 p! i! o$ \) D% Q4 g! @cytochrome P450 (CYP)-dependent activity.* W6 ~0 A7 ~% H
Conclusion: hMSC are able to undergo mesenchymal-to-epithelial transition. TSA is hereby* X. A( ~6 H1 x) K( X( D
essential to promote differentiation of hMSC towards functional hepatocyte-like cells.作者: chailh 时间: 2009-6-30 08:53