Reduced insulin endocytosis in serum-transformed fibroblasts demonstrated by flow cytometry

Murphy, R. F., Powers, S., Cantor, C. R., Pollack, R. (May 1984) Reduced insulin endocytosis in serum-transformed fibroblasts demonstrated by flow cytometry. Cytometry, 5 (3). pp. 275-80. ISSN 0196-4763 (Print)0196-4763

URL: http://www.ncbi.nlm.nih.gov/pubmed/6376000
DOI: 10.1002/cyto.990050310

Abstract

Neoplastic transformation often results in the loss of growth control and concomitant changes in cell surface properties. The changes in endocytosis of a variety of probes after serum or anchorage transformation were measured for mouse fibroblasts by flow cytofluorometry. No major differences in dextran (fluid phase) or histone (nonspecific-adsorptive) endocytosis were observed among four cell lines with different growth properties. However, decreased receptor-mediated internalization of alpha 2-macroglobulin was observed for cell lines transformed to either serum or anchorage independence. Furthermore, increased wheat germ agglutinin and decreased insulin endocytosis were observed, but only in serum transformants. The changes specific to serum transformants were not accounted for by changes in binding of wheat germ agglutinin or insulin. The possible implications of these observations regarding serum transformation and the insulin requirement for growth in serum-free medium are discussed.

Item Type: Paper
Uncontrolled Keywords: Animals Cell Line Cell Transformation, Neoplastic/*metabolism *Endocytosis Fibroblasts *Flow Cytometry Insulin/*metabolism Mice
Subjects: organs, tissues, organelles, cell types and functions > cell types and functions > cell types > fibroblasts
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > fibroblasts
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > fibroblasts

Investigative techniques and equipment > flow cytometry
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > insulin receptor
CSHL Authors:
Communities: CSHL labs > Powers lab
Depositing User: Matt Covey
Date: May 1984
Date Deposited: 26 Feb 2014 16:57
Last Modified: 26 Feb 2014 16:57
Related URLs:
URI: http://repository.cshl.edu/id/eprint/29511

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