Regulation of the synthesis of S-100 protein in rat glial cells.
Year: 1980
Type: article
Abstract: The influence of serum on the synthesis of the nervous system specific S-100 protein has been investigated in the rat glial cell clone C61a. In sparse cells, where S-100 synthesis is low, removal of serum leads to a 2- to 3-fold increase of the rate of S-100 synthesis relative to total soluble cell protein. Measurements of S-100 content by radioimmunoassay showed that sparse cells are accumulating S-100 much more rapidly in the absence of serum. Our findings suggest that serum components inhibit the expression of S-100 synthesis in sparse cells by a concentration-dependent mechanism. This effect does not correlate directly with the reduced cellular growth rate in low serum or serum-free medium. Lipid-free medium, which has little growth-promoting activity, maintains the capacity to lower the rate of S-100 synthesis. A partially purified extract of platelets can substitute for serum in repressing the synthesis of the S-100 protein.
Source: Journal of Biological Chemistry
Institution: Washington University in St. Louis
Language: English
Topic: S100 Proteins and Annexins
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: hybrid
Estimated APC paid: $3,430
OpenAlex ID: W1563688046