Taves EH, Wolfe BM. Estradiol is a potent inhibitor of the hypotriglyceridemic effect of levonorgestrel in female rats.
Lipids 1989;
24:669-72. [PMID:
2506402 DOI:
10.1007/bf02535088]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The progestin, levonorgestrel, when administered to rats intramuscularly, significantly lowered both total and very low density lipoprotein triglyceride concentrations in the blood plasma by 35-40%. This effect was readily abolished by the simultaneous intramuscular administration of estradiol benzoate. Similarly, estradiol-17 beta overcame the inhibitory effects of levonorgestrel on the incorporation of [9,10-3H]palmitate into triglycerides of freshly isolated rat hepatocytes studied in vitro. However, estradiol alone significantly raised plasma triglycerides by two-fold in vivo. Estradiol also significantly enhanced (by 9%) the incorporation of [9,10-3H]palmitate into hepatocyte triglycerides. These results suggest that the effects of estradiol on triglyceride synthesis and concentration dominate over those of levonorgestrel in the rat.
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