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result sql = Effect of lindane on mitochondrial side-chain cleavage of cholesterol in mice.
Effect of lindane on mitochondrial side-chain cleavage of cholesterol in mice.
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char = n;code = 110
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result sql = Cholesterol side-chain cleavage of mitochondria, the key rate limiting step in steroid biosynthesis in ovarian tissues, was studied in female Swiss mice fed lindane (gamma-hexachlorocyclohexane) at various doses and over varying periods. The insecticide adversely affected cholesterol side-chain cleavage of the ovary as judged by decreased conversion of this sterol to pregnenolone and subsequently to progesterone in a dose-dependent manner. The formation of pregnenolone was maximally inhibited (75% inhibition) at the highest intake of insecticide with simultaneous inhibition of its conversion to progesterone. At all doses, the rate of inhibition of pregnenolone formation was comparatively higher than its conversion to progesterone. The significant inhibition of cholesterol side-chain cleavage by lindane and resultant decrease in the rate of steroidogenesis in the ovary would account for the observed gonadal hormone deficiency and related reproductive disorders in the lindane-fed mice.

Publication: Toxicology 1990 Mar 30 ;61(1)::41-6.
Publication Date: 1990 Mar 30
Study Author(s): Sircar, S;Lahiri, P;
Institution: Department of Zoology, University of Calcutta, India.
Shortcut link to this study:
Cholesterol side-chain cleavage of mitochondria, the key rate limiting step in steroid biosynthesis in ovarian tissues, was studied in female Swiss mice fed lindane (gamma-hexachlorocyclohexane) at various doses and over varying periods. The insecticide adversely affected cholesterol side-chain cleavage of the ovary as judged by decreased conversion of this sterol to pregnenolone and subsequently to progesterone in a dose-dependent manner. The formation of pregnenolone was maximally inhibited (75% inhibition) at the highest intake of insecticide with simultaneous inhibition of its conversion to progesterone. At all doses, the rate of inhibition of pregnenolone formation was comparatively higher than its conversion to progesterone. The significant inhibition of cholesterol side-chain cleavage by lindane and resultant decrease in the rate of steroidogenesis in the ovary would account for the observed gonadal hormone deficiency and related reproductive disorders in the lindane-fed mice.
PMID: 1690465

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