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Plasma absorption and ultrastructural changes of rat testicular cells induced by lindane

Faculty of Chemical Sciences, University of Concepcion, Casilla 160-C, Concepción, Chile

F Villena

Faculty of Biological Sciences, University of Concepcion, Concepción, Chile

D Marcus

A M Ronco

Reproduction Biology Unit, INTA, University of Chile, Santiago, Chile

This paper describes, for the first time, how topical application in rats of a commercial preparation of lindane widely used in public health, at similar doses and routes of administration as in humans, leads to rapid absorption and accumulation of lindane in the testes. An early peak of absorption was detected in plasma 6 h after topical treatment of male Wistar rats with a commercial preparation of 1% lindane (Plomurol). Higher plasma levels were observed after repetitive doses of 60 mg/kg b.w., the amount recommended for the treatment of scabies and pediculosis in humans in several countries. A residue level of 7.4±0.67,ag/g was found in testicular tissue 6 h after a single daily topical application for 4 consecutive days. The ultrastructural study of testicular interstitial cells exposed to dermal application of lindane (Plomurol®) revealed widespread damage of a great number ofLeydig cells, some ofwhich were completely disintegrated.

Key Words: lindane • rat • testes • Leydig cells • tissue concentration • plasma absorption

Human & Experimental Toxicology, Vol. 19, No. 9, 529-533 (2000)
DOI: 10.1191/096032700675826027


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