Title : Hormone-regulated and glucose-sensitive transport of dehydroascorbic acid in immature rat granulosa cells.

Pub. Date : 1999 Aug

PMID : 10433224






3 Functional Relationships(s)
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1 Almost 90% of accumulated DHAA was present as ascorbic acid within 2 h. Preculture of cells for 24 h with FSH (50 ng/ml) and IGF-I (30 ng/ml) significantly stimulated DHAA uptake compared with the control (158 +/- 16 vs. 43 +/- 8 pmol/10(6) cells, respectively). Dehydroascorbic Acid insulin-like growth factor 1 Rattus norvegicus
2 Almost 90% of accumulated DHAA was present as ascorbic acid within 2 h. Preculture of cells for 24 h with FSH (50 ng/ml) and IGF-I (30 ng/ml) significantly stimulated DHAA uptake compared with the control (158 +/- 16 vs. 43 +/- 8 pmol/10(6) cells, respectively). Dehydroascorbic Acid insulin-like growth factor 1 Rattus norvegicus
3 Northern and Western analysis of GLUT1 in granulosa cells following 24 h coincubation with FSH and IGF-I revealed up-regulation of GLUT1 at both the messenger RNA and protein levels (1.6- and 1.3-fold of control, respectively), suggesting that the stimulatory effects of FSH and IGF-I on DHAA transport are mediated by the induction of GLUT1. Dehydroascorbic Acid insulin-like growth factor 1 Rattus norvegicus