Selective hormonal control of myo-inositol biosynthesis in reproductive organs and liver of the male rat.
myo-Inositol biosynthesis has been examined in hypophysectomized and thyroidectomized male rats. After hypophysectomy, inositol-1-phosphate synthase [1L-myo-inositol-1-phosphate lyase (isomerizing), EC 5.5.1.4] in the reproductive organs and liver decreased markedly. At the same time, testicular acid phosphatase [orthophosphoric-monoester, phosphohydrolase (acid optimum), EC 3.1.3.2] and beta-glucuronidase (beta-D-glucuronide glucuronosohydrolase, EC 3.2.1.31) increased. Thyroidectomy caused a similar decrease in inositol-1-phosphate synthase in the liver but not in the reproductive organs. Follicle-stimulating in the liver but not in the reproductive organs. Follicle-stimulating hormone (follitropin) and luteinizing hormone (lutropin) restored the activity to at least normal levels in the testis, prostate, and seminal vesicle but not in the liver of hypophysectomized animals. Triiodothyronine and thyroxine stimulated liver synthase 30-fold in hypophysectomized animals. We conclude that inositol-1-phosphate synthase in the reproductive organs is under more or less direct control of the pituitary; in the liver, the control is mediated through the thyroid.
D000135:Acid Phosphatase / Q000378:metabolism; D000315:Adrenalectomy; D000818:Animals; D005837:Genitalia, Male / Q000378:metabolism*; D005966:Glucuronidase / Q000378:metabolism; D007016:Hypophysectomy; D007294:Inositol / Q000096:biosynthesis*; D007668:Kidney / Q000378:metabolism; D008099:Liver / Q000378:metabolism*; D008297:Male; D007296:Myo-Inositol-1-Phosphate Synthase / Q000378:metabolism; D051381:Rats; D011919:Rats, Inbred Strains; D013965:Thyroidectomy
D007294:Inositol; D000135:Acid Phosphatase; D005966:Glucuronidase; D007296:Myo-Inositol-1-Phosphate Synthase