E-, P-, and N-cadherin are co-expressed in the nasopharyngeal carcinoma cell line TW-039.

Abstract:

:The cadherin/catenin complex plays a key role in the initiation of cell-cell recognition, and adhesion, and the elaboration of structural and functional organization in multicellular tissues and organs. It is associated with tumor metastasis and also acts as an "invasion suppressor" of cancer cells. Nasopharyngeal carcinoma (NPC) is notorious for its highly metastatic nature. The expression of the E-cadherin/catenin complex is down-regulated in NPC tumor specimens. To obtain better insight into the intercellular adhesive property of NPC cells, we used immunofluorescence microscopy, immunoprecipitation, and immunoblot analysis to examine the expression of the classical cadherins and beta-catenin in a NPC cell line, TW-039. The results demonstrate a change in the distribution of E-cadherin from cytosolic flakes to cell-cell contacts with increasing time in culture. Between days 1 and 5 after plating, the detergent-insoluble fraction of E-cadherin increased from 20% to 37% of total E-cadherin, and that for P-cadherin increased from 33% to 40%. By contrast, the values for beta-catenin remained unchanged (26% and 25%). Both immunofluorescence and immunoblot studies suggested that P-cadherin may be involved in pioneer contact adhesion of TW-039 cells. Interestingly, E-, P-, and N-cadherin are co-expressed in this cell line. Immunoprecipitation studies also showed that other members of the cadherin family may be involved in the contact adhesion of TW-039 cells.

journal_name

J Cell Biochem

authors

Lou PJ,Chen WP,Lin CT,DePhilip RM,Wu JC

subject

Has Abstract

pub_date

1999-11-01 00:00:00

pages

161-72

issue

1

eissn

0730-2312

issn

1097-4644

pii

10.1002/(SICI)1097-4644(20000101)76:1<161::AID-JCB

journal_volume

76

pub_type

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