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Am J Pathol. 2003 Nov;163(5):1791-800.

Beta4 integrin and laminin 5 are aberrantly expressed in polycystic kidney disease: role in increased cell adhesion and migration.

Author information

1
INSERM 507, Hôpital Necker, 149 rue de Sévres, 75015 Paris, France. joly@necker.fr

Abstract

Extracellular matrix alterations have been suggested to be part of the early events occurring in Autosomal Dominant Polycystic Kidney Disease (ADPKD), a disease characterized by formation of renal cysts and progressive renal failure. Here we report that cDNA array analysis identified beta(4) integrin aberrant expression in ADPKD cells. Furthermore, laminin 5 (Ln-5), the main alpha(6)beta(4) integrin ligand, was also found to be abnormally expressed in ADPKD. Studies performed with ADPKD cyst-lining epithelial cells (CC) by comparison with normal tubular cells indicate that integrin alpha(6)beta(4)-Ln-5 interactions are involved in cellular events of potential importance for cystogenesis: 1) laminin 5 is a preferential adhesion substrate for CC, mainly through alpha(6)beta(4) interaction, 2) CC increased haptotactic and chemotactic motility depends on the presence of Ln-5 and requires integrin alpha(3)beta(1) cooperation, and 3) CC haptotactic or chemotactic migration is specifically increased by mAb-mediated beta(4) integrin ligation, through an alpha(3)beta(1) integrin-dependent and independent pathway, respectively. These results highlight the role of Ln-5 and alpha(6)beta(4) integrin in adhesive and motility properties of cyst-lining epithelial cells, and further suggest that integrins and extracellular matrix modifications may be of general relevance to kidney epithelial cell cyst formation.

PMID:
14578180
PMCID:
PMC1892423
DOI:
10.1016/s0002-9440(10)63539-0
[Indexed for MEDLINE]
Free PMC Article

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