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Bromodeoxyuridine‐induced reversion of transformed characteristics in BHK21 cells: Changes at the plasma membrane level
Author(s) -
LageDavila A.,
Krust B.,
HofmannClerc F.,
Torpier G.,
Montagnier L.
Publication year - 1979
Publication title -
journal of cellular physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.529
H-Index - 174
eISSN - 1097-4652
pISSN - 0021-9541
DOI - 10.1002/jcp.1041000110
Subject(s) - reversion , membrane , in vitro , transformation (genetics) , hamster , biology , glycosylation , hexose , biochemistry , bromodeoxyuridine , microbiology and biotechnology , chemistry , phenotype , cell growth , enzyme , gene
When BHK21 cells transformed by hamster sarcoma virus aregrown in the presence of 5‐Bromodeoxyuridine (BUdr), several in vitro properties of the transformed cells such as morphology, adhesiveness, and alignment, revert towards a state close to that of untransformed cells. We have studied plasma membrane changes associated with this phenotypic reversion by several different biochemical methods. Reversion is accompanied by a reappearance of Fibronectin, an increase in a membrane‐associated protein of M. W. 195,000, a decrease in glycosylation and exposure of a glycoprotein M. W. 100,000 which is increased in transformed cells and a decrease in Con A‐agglutinability. On the other hand, several membrane changes associated with malignant transformation namely, the increase in an integral membrane protein M. W. 177,000, the higher rate of hexose uptake, the increase in high molecular weight surface glycopeptides and, to some extent, the increase in the density of intramembrnous particles, did not revert under BUdr treatment. Thus, membrane properties of transformed cells may be dissociated into two main groups by BUdr treatment. In addition, the exposure and glycosylation of a growth‐regulated membrane protein M. W. 160,000 was highly sensitive to BUdr.