doi: 10.1016/0014-5793(87)81481-3.
Glucose regulates preproinsulin messenger RNA levels in a clonal cell line of simian virus 40-transformed B cells
- PMID: 3030804
- DOI: 10.1016/0014-5793(87)81481-3
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Glucose regulates preproinsulin messenger RNA levels in a clonal cell line of simian virus 40-transformed B cells
FEBS Lett.
.
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Abstract
In HIT-T15 cells grown in the absence of glucose, Northern blot analysis of total RNA revealed a major 0.5 kb preproinsulin (ppI) mRNA transcript which co-migrated with the mature transcript from a human insulinoma. In 4 h tissue cultures, glucose (2-20 mM) stimulated HIT cell ppI mRNA levels in a markedly dose-dependent manner. Glucose-stimulated ppI mRNA was (i) inhibited by actinomycin D, suggesting that regulation may be in part transcriptional, and (ii) potentiated by agents known to activate B cell protein kinases. HIT cells represent a unique model for investigating long term regulation of insulin gene expression and biosynthesis.
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