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N-cadherin function is required for differentiation-dependent cytoskeletal reorganization in lens cells in vitro.

Abstract：

:Members of the cadherin family of cell adhesion molecules participate in calcium-dependent cell-cell adhesions that are necessary for the cell sorting events that regulate early developmental processes. Although individual cadherin molecules have been shown to participate in tissue histogenesis, the regulation of function of these receptors in cell differentiation has been more difficult to identify. We have determined that N-cadherin linkage to the cytoskeleton is correlated with lens cell differentiation in vivo. Through the use of a chick embryo lens culture system that mimics differentiation in vivo, we have determined that N-cadherin linkage to the cytoskeleton is altered and lens differentiation is blocked by function-blocking antibodies to N-cadherin. In the presence of the N-cadherin function-blocking antibody, NCD-2, both N-cadherin and filamentous actin are prevented from organizing at the cortical membranes. This correlates with an inhibition of lens morphogenesis and differentiation. These results are paralleled by changes in the expression of the molecular components of the cadherin-catenin complex and their linkage to the actin cytoskeleton. In the presence of NCD-2, expression of N-cadherin, alpha-catenin, and beta-catenin is inhibited and their association with the cytoskeleton blocked. Overall cadherin expression, however, remains unchanged as demonstrated by studies with a pan-cadherin antibody. This is accompanied by an increase in expression of the cadherin cytoskeletal protein plakoglobin. Although the cells have tried to compensate for the loss of N-cadherin by up-regulation of another cadherin(s) and plakoglobin, this is unable to compensate for N-cadherin function. The data strongly suggest that N-cadherin and its associated cytoskeleton play an important role in the differentiation process that leads to the formation of the crystalline lens.

journal_name

Exp Cell Res

journal_title

Experimental cell research

authors

Ferreira-Cornwell MC,Veneziale RW,Grunwald GB,Menko AS

doi

10.1006/excr.2000.4819

keywords:

subject

Has Abstract

pub_date

2000-04-10 00:00:00

pages

237-47

issue

eissn

0014-4827

issn

1090-2422

pii

S0014-4827(00)94819-5

journal_volume

256

pub_type

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N-cadherin function is required for differentiation-dependent cytoskeletal reorganization in lens cells in vitro.