Abstract：
:Laminins are structurally and functionally major components of the extracellular matrix. Four isoforms of laminins (laminin-1, -2, -5 and -10) are expressed in a specific pattern along the crypt-villus axis of the intestine. Previous works indicated that expression of these isoforms is developmentally regulated and that laminins could modulate the behaviour of intestinal cells, but the exact role of each isoform remained unclear. Here, we report the first systematic analysis of the cellular functions of the four isoforms using the human colon adenocarcinoma Caco2/TC7 cell line as a model. We compared the respective abilities of each isoform to modulate adhesion, proliferation and differentiation of intestinal epithelial cells. We found that the isoforms were functionally distinct, with laminin-10 being the most adhesive substratum, laminin-2, laminin-5 and laminin-10 enhancing cellular proliferation and at the opposite, laminin-1 stimulating intestinal cell differentiation. To begin to characterise the molecular events induced by the different isoforms, we examined by immunofluorescence the intracellular distribution of several nuclear proteins, recently highlighted by a nuclear proteomic approach. We observed clear nucleocytoplasmic redistribution of these proteins, which depended on the laminin isoform. These results provide evidence for a distinct functional role of laminins in intestinal cell functions characterised by specific localisation of nuclear proteins.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Turck N,Gross I,Gendry P,Stutzmann J,Freund JN,Kedinger M,Simon-Assmann P,Launay JFdoi
10.1016/j.yexcr.2004.10.025keywords:
subject
Has Abstractpub_date
2005-02-15 00:00:00pages
494-503issue
2eissn
0014-4827issn
1090-2422pii
S0014-4827(04)00662-7journal_volume
303pub_type
杂志文章abstract：:A ts mutant clone, tsJT60, was isolated from Fisher rat cell line, 3Y1. During the exponential growth at both 34 and 39.5 degrees C, tsJT60 did not appear as ts mutant cells. However, once entered resting state (G0) under serum deprivation at the confluent state, they could re-enter S phase at 34 degrees C but could n...
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pub_type： 杂志文章,评审
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