This paper is only available as a PDF. To read, Please Download here.
Abstract
Gossypol has been shown to inhibit steroidogenesis in leydig cells. This study examined
the mechanism of this action by investigating the effect of gossypol on leydig cell
hCG receptor binding, adenylate cyclase activity and cyclic AMP production in leydig
cells. Gossypol had no effect on hCG binding to cell membranes but inhibited LH-stimulated
cyclic AMP production in whole purified leydig cells. It also reduced the stimulation
caused by LH, Gpp(NH)p, forskolin and fluoride in membranes from leydig cells and
also from liver. It is therefore possible that gossypol affects cyclic AMP production
at the level of ATP conversion to cyclic AMP, although effects on the G-protein and
catalytic subunit cannot be ruled out.
To read this article in full you will need to make a payment
Purchase one-time access:
Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online accessOne-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:
Subscribe to ContraceptionAlready a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
References
- Gossypol: a potential antifertility agent for males.Ann Rev Pharmacol Toxicol. 1984; 24: 329-360
- Gossypol inhibits testicular steroidogenesis.Fertil Steril. 1981; 35: 563-566
- Inhibition by gossypol of testosterone production by mouse leydig cells in vitro.Contraception. 1985; 31: 165-171
- Effect of gossypol on adenylate cyclase, cAMP, prostaglandins and testosterone of interstitial cells of rat in vitro.Kexue Tongbao. 1984; 29: 960-963
- Gossypol inhibition of adenylate cyclase.Arch Biochem Biophys. 1984; 231: 411-415
- The viability of mouse Leydig cells in vitro following incubation with Gossypol.Contraception. 1985; 32: 275-281
Pearce, S., Sufi, S.B., O'Shaughnessy, P.J., Donaldson, A. and Jeffcoate, S.L. Site of gossypol inhibition of steroidogenesis in purified mouse leydig cells. J Steroid Biochem (in press).
- A simplified procedure for the determination of adenylate cyclase activity.Biochem Soc Trans. 1973; 1: 477-479
- Femtomole sensitive radioimmunoassay for cyclic AMP and cyclic AMP after 2'0 acetylation by acetic anhydride in aqueous solution.J Cyc Nuc Res. 1975; 1: 207-218
- A simple and sensitive saturation assay for the measurement of 3′,5′-cyclic monophosphate.Biochem J. 1971; 121: 561
- A rapid and sensitive method for the quantitation of microgram quantities of protein utilising the principle of protein-dye binding.Ann Biochem. 1976; 72: 248-254
- Is cAMP the obligatory second messenger in the action of lutropin on leydig cell steroidogenesis?.Biochem Biophys Res Comm. 1985; 128: 1164-1172
Article info
Publication history
Accepted:
December 4,
1986
Received:
October 15,
1986
Identification
Copyright
© 1987 Geron-X, Inc. Published by Elsevier Inc. All rights reserved.