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  • Title: Roles of growth hormone and testosterone in the synthesis of mouse kidney glucuronidase.
    Author: Swank RT.
    Journal: Mol Cell Endocrinol; 1978 Nov; 12(2):139-49. PubMed ID: 729903.
    Abstract:
    Mouse kidney beta-glucuronidase production is under multihormonal control. In normal mice, kidney glucuronidase is induced over 100-fold by testosterone. However, hypophysectomy reduces this induction to about 5% of normal. This loss in inducibility was in part restored by growth hormone. Simultaneous administration to hypophysectomized female mice of growth hormone and testosterone, but not of prolactin and testosterone, restored kidney glucuronidase concentration to half that found in testosterone-treated normal female mice. Growth hormone alone had no effect in hypophysectomized females nor did it enhance glucuronidase activity in testosterone-treated normal females. Radiolabeling experiments demonstrated that the enhancement by growth hormone of glucuronidase activity was accompanied by a corresponding increase in its rate of synthesis. Kidney hypertrophy and kidney glucuronidase production may be under common hormonal regulation. Testosterone or growth hormone treatment alone of hypophysectomized mice had little or no effect on either process, but combined treatment with the two hormones significantly enhanced both. The rate of synthesis of kidney glucuronidase is controlled by the Gur gene. Relative differences in kidney glucuronidase synthesis in mice of different Gur genotype were maintained in testosterone-treated hypophysectomized mice. This suggests that control of glucuronidase synthesis by the Gur locus is exerted by interaction with androgens rather than pituitary products.
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