Abstract:
UNLABELLED:The success of hepatocyte transplantation has been limited by the low efficiency of transplanted cell integration into liver parenchyma. Human fetal hepatic progenitor cells (hepatoblasts) engraft more effectively than adult hepatocytes in mouse livers. However, the signals required for their integration are not yet fully understood. We investigated the role of HGF on the migration and invasive ability of human hepatic progenitors in vitro and in vivo. Hepatoblasts were isolated from the livers of human fetuses between 10 and 12 weeks of gestation. Their invasive ability was assessed in the presence or absence of HGF. These cells were also transplanted into immunodeficient mice and analyzed by immunohistochemistry. In contrast to TNF-alpha, HGF increased the motogenesis and invasiveness of hepatoblasts, but not of human adult hepatocytes, via phosphorylation of extracellular signal-regulated kinase (ERK) 1/2. The invasive ability of human hepatoblasts correlated with the expression and secretion of matrix metalloproteinases (MMPs). Hepatoblasts stimulated with HGF prior transplantation into newborn mice migrated from the portal area into the hepatic parenchyma. CONCLUSIONS:In contrast to adult hepatocytes, hepatoblasts display invasive ability that can be modulated by HGF in vitro and in vivo.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Delgado JP,Vanneaux V,Branger J,Touboul T,Sentilhes L,Mainot S,Lainas P,Leclerc P,Uzan G,Mahieu-Caputo D,Weber Adoi
10.1016/j.yexcr.2009.07.007subject
Has Abstractpub_date
2009-11-15 00:00:00pages
3396-405issue
19eissn
0014-4827issn
1090-2422pii
S0014-4827(09)00307-3journal_volume
315pub_type
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