Fibroblast growth factor signaling regulates the expansion of A6-expressing hepatocytes in association with AKT-dependent β-catenin activation.
Fibroblast growth factor signaling regulates the expansion of A6-expressing hepatocytes in association with AKT-dependent β-catenin activation.
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DOI:
10.1016/j.jhep.2013.12.017
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发表时间:
2014-05
影响因子:
25.7
通讯作者:
Wang, Kasper S.
中科院分区:
文献类型:
--
作者:
Utley, Sarah;James, David;Mavila, Nirmala;Nguyen, Marie V.;Vendryes, Christopher;Salisbury, S. Michael;Phan, Jennifer;Wang, Kasper S.
Fibroblast Growth Factors (FGFs) promote the proliferation and survival of hepatic progenitor cells (HPCs) via AKT-dependent β-catenin activation. Moreover, the emergence of hepatocytes expressing the HPC marker A6 during 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC)-induced liver injury is mediated partly by FGF and β-catenin signaling. Herein, we investigate the role of FGF signaling and AKT-mediated β-catenin activation in acute DDC liver injury. Transgenic mice were fed DDC chow for 14 days concurrent with either Fgf10 over-expression or inhibition of FGF signaling via expression of soluble dominant-negative FGF Receptor (R)-2IIIb. After 14 days of DDC treatment, there was an increase in periportal cells expressing FGFR1, FGFR2, and AKT-activated phospho-Serine 552 (pSer552) β-CATENIN in association with up-regulation of genes encoding FGFR2IIIb ligands, Fgf7, Fgf10, and Fgf22. In response to Fgf10 over-expression, there was an increase in the number of pSer552-β-CATENIN(positive)+ive periportal cells as well as cells co-positive for A6 and hepatocyte marker, Hepatocyte Nuclear Factor-4α (HNF4α). A similar expansion of A6+ive cells was observed after Fgf10 over-expression with regular chow and after partial hepatectomy during ethanol toxicity. Inhibition of FGF signaling increased the periportal A6+iveHNF4α+ive cell population while reducing centrolobular A6+ive HNF4α+ive cells. AKT inhibition with Wortmannin attenuated FGF10-mediated A6+iveHNF4α+ive cell expansion. In vitro analyses using FGF10 treated HepG2 cells demonstrated AKT-mediated β-CATENIN activation but not enhanced cell migration. During acute DDC treatment, FGF signaling promotes the expansion of A6-expressing liver cells partly via AKT-dependent activation of β-CATENIN expansion of A6+ive periportal cells and possibly by reprogramming of centrolobular hepatocytes.
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影响因子:
5.2
作者:
Stamp, Lincon A.;Braxton, David R.;Pera, Martin F.
通讯作者:
Pera, Martin F.
影响因子:
13.5
作者:
Jung, Youngmi;McCall, Shannon J.;Diehl, Anna Mae
通讯作者:
Diehl, Anna Mae
影响因子:
10.5
作者:
Dorrell, Craig;Erker, Laura;Grompe, Markus
通讯作者:
Grompe, Markus
影响因子:
29.4
作者:
Böhm F;Speicher T;Hellerbrand C;Dickson C;Partanen JM;Ornitz DM;Werner S
通讯作者:
Werner S
DOI:
10.1083/jcb.201108077
发表时间:
2012-06-11
期刊:
The Journal of cell biology
影响因子:
--
作者:
Chioni AM;Grose R
通讯作者:
Grose R