Characterization of the intermediate filament proteins of murine mammary gland epithelial cells. Response to collagen substratum.

Abstract:

:The insoluble cytoskeletal material remaining after detergent lysis of 'Normal' Murine Mammary Gland (NMuMG) cells, growing on plastic or collagen gel substrata, was analyzed by two-dimensional gel electrophoresis. The identity of the cytoskeletal elements was determined by their solubility properties, electrophoretic separation pattern, and immunoreactivity using monoclonal antibodies against intermediate filament proteins (AIF), keratins (AE1 and AE3) and actin. The electrophoretic pattern of the cytoskeletal elements from the NMuMG cell strain was found to be very similar to that of primary mouse mammary epithelial cells. Both NMuMG and primary mammary epithelial cells when grown on collagen exhibited an increased expression of a 49 kD protein with a pI of 5.6, that appeared to be a cytokeratin. Many of the cytoskeletal proteins remained tightly attached to the collagen gel substratum after cell lysis. These results demonstrate that the NMuMG cell strain has retained a stable expression of cytokeratins that remains responsive to the presence of extracellular matrix material.

journal_name

Exp Cell Res

authors

Hall HG,Bissell MJ

doi

10.1016/0014-4827(86)90343-5

subject

Has Abstract

pub_date

1986-02-01 00:00:00

pages

379-89

issue

2

eissn

0014-4827

issn

1090-2422

pii

0014-4827(86)90343-5

journal_volume

162

pub_type

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