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Abstract

Volume 8, Issue 1 (January 2006) 8, 111–114; 10.1111/j.1745-7262.2006.00057.x

Effects of extracts from Hibiscus macranthus and Basella alba mixture on testosterone production in vitro in adult rat testes slices

Paul F Moundipa, Silvère Ngouela, Pierre Kamtchouing, Etienne Tsamo, Félicité M Tchouanguep and Serge Carreau

1.Laboratory of Nutrition and Biochemical Toxicology, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
2.aboratory of Organic Chemistry, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
3.epartment of Animal Biology and Physiology, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
4.aculty of Science, University of Dschang, P. O. Box 67, Dschang, Cameroon
5.SC INRA-EA 2608, Laboratoire de Biochimie, Esplanade de la paix, Université de Caen, 14032 Caen-cedex, France

Correspondence: Prof. Paul F. Moundipa, Laboratory of Nutrition and Biochemical Toxicology, University of Yaoundé I, P. O. Box 812, Yaoundé, Cameroon. Fax: +237-222-1320. E-mail: pmoundipa@uycdc.uninet.cm

Received 19 October 2004; Accepted 24 May 2005.

Abstract

Aim: To find an in vitro system for the measurement of the androgenic effects of different extracts of Hibiscus macranthus (Malvaceae) and Basella alba (Basellaceae).

Methods: The production of testosterone from testes slices incubated in two media, either Krebs-Henseleit buffer containing 0.5 % Bovine serum albumin (BSA) or Dubecco's Modified Eagle's medium-F12 Ham nutrient mixture (DME/Ham F12), under a mixture of 5 % CO2 in 95 % air was determined either in the presence or absence of cofactors and Hibiscus macranthus plus Basella alba (HMBA) extracts.

Results: The testosterone production was increased in testes slices incubated in DME/Ham F12 medium in response to the cofactors (49 %) and aqueous extracts (34 %-60 % according to dilutions). Under the same atmospheric conditions, there was no positive response of the testes slices to either cofactor or HMBA extract stimulation in Krebs-Henseleit buffer containing 0.5 % BSA. In further investigations related to the effect of HMBA, the DME/ Ham F12 medium was used. The results obtained from the in vitro test showed that the activity was present mainly in methylene chloride and methanol, since these extracts induced an increase in testosterone production by testes slices.

Conclusion: The testes slice system is suitable to be used for further in vitro investigations of the isolation of androgenic bioactive components of plants.

Keywords: testis, testosterone, plant extracts, Hibiscus macranthus, Basella alba

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