Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.4.15.1 (ACE)
 18,300 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The enzymes delta5-3beta-hydroxysteroid dehydrogenase delta5-3beta-HSD) and glucose-6-phosphate dehydrogenase (G-6-PDH) were demonstrated histochemically in the adrenal cortex of female rat. The activities of these enzymes were increased significantly in the alloxan-treated rats kept in LD (light: darkness) cycles of 10:14 h. Continuous light exposure to diabetic animals appeared to decrease delta5-3beta-HSD and g-6-PDH in comparison to the diabetic rats kept in 10 h illumination. The evidence indicates that suppression of adrenal steroidogenesis in diabetic rats after exposure to continuous light is due to the alteration of pentose phosphate pathway.
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PMID:Adrenal dehydrogenases in alloxan diabetic rats following continuous exposure to light. 60 81

The major role of the corpus luteum is biosynthesis of progesterone. Luteal function has been investigated by following plasma progesterone concentrations and by studying ultrastructural and histochemical changes in corpora lutea. Recently, changes in enzyme activities concerned with formation and degradation of progesterone are taken into investigation in order to understand the regulation of luteal function. In rat ovaries, progestational potency of ovarian secretions has been regulated by the activity of 20 alpha-hydroxysteroid dehydrgoenase (20 alpha-HSD), Which catabolizes progesterone to 20 alpha-hydroxypregn-4-en-3-one, progestatinally inert steroid. In regressing corpora lutea, extensive conversion of progesterone to 20 alpha-hydroxypregn-4-en-3-one occurred with a marked increase in 20 alpha-HSD activity as well as a decrease in plasma progesterone concentrations. On the other hand, histochemical studies of glucose-6-phosphate dehydrogenase (G 6 PDH) and delta5-3beta-hydroxysteroid dehydrogenase (3 beta-HSD) have been investigated without any remarkable changes in corporalutea at their early stages of luteolysis. In the present study the activities of steroidogenic enzymes in corpora lutea of pregnant rats are measured after treatment with a variety of abortifacient drugs, and compared with those in corpora lutea of 1 day post partum rats which showed changes characteristic of spontaneous luteolysis. On days 7 to 9 of pregnancy, Wistar-strain pregnant rats were injected with either prostaglandin F2alpha (PGF2alpha), aminoglutethimide or clomiphene citrate (clomid). Animals were sacrificed 15 to 63 hrs. after the last injection, and implantation sites were inspected. Ovaries were removed, and corpora lutea dissected free, weighed and homogenized. The homogenate was centrifuged at 105,000g for 60 min. The supernatant solution was assayed for the activities of G 6 PDH, 6-phosphogluconate dehydrogenase (6 PGDH), malic enzyme, ATP citrate lysase, 20 alpha-HSD and pyruvate kinase. The pellet fraction was re-homogenized, and centrifugated 2,000 g for 5 min. The supernatant solution was used for the assay of 3 beta-HSD. Complete fetal resorption was observed in all rats treated with PGF2alpha, while 7 out of 15 rats (47%) treated with both PGF2alpha and LH-RH maintained pregnancy. In intact rats after treatment with both drugs, lutein cells showed ultrastructures characteristic for luteolysis, although the degree of luteolysis was greatly diminished compared with PGF2alpha-treated ones. In agreement with these ultrastructural findings, 20alpha-HSD activity in corpora lutea was maintained at a rather low level in intact rats, while it was increased moderately in aborted ones after treatment with both drugs. In PGF2alpha-treated rats, G 6 PDH activity increased to 140% and malic enzyme activity decreased to 27% of the activity in control rats. In aminoglutethimide-treated rats, the activites of G 6 PDH and malic enzyme were decreased, while 2-alpha-HSD activity was maintained at a low level...
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PMID:[Studies on the activities of steroidogenic enzymes in corpora lutea of early pregnant rats treated with abortifacient drugs (author's transl)]. 124 45

Carbendazim (methyl-2-benzimidazole carbamate, MBC) a metabolite of benomyl is one of the most widespread environmental contaminant of major concern to human and animal reproductive health. The present investigation was undertaken to study the impact of carbendazim exposure on Leydig cell functions. Adult albino male rats of the Wistar strain were administered with carbendazim (25 mg/(kg (body weight)/day)) orally for 48 days. The control animals received vehicle (corn oil) alone. Another group of rats were treated with carbendazim and the same was withdrawn for a further period of 48 days. After the treatment period, rats were euthanized and blood was collected for the assay of serum hormones such as luteinizing hormone (LH), prolactin (PRL), testosterone and estradiol. Testes were immediately removed and Leydig cells were isolated in aseptic condition. Purified Leydig cells were used for quantification of steroidogenic enzymes such as 3beta-hydroxysteroid dehydrogenase (3beta-HSD) and 17beta-hydroxysteroid dehydrogenase (17beta-HSD). Leydig cellular enzymatic antioxidants superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR), glutathione-S-transferase (GST), gamma-glutamyl transpeptidase (gamma-GT), glucose-6-phosphate dehydrogenase (G6PDH) and non-enzymatic antioxidants such as reduced glutathione (GSH), alpha-tocopherol (vitamin E), ascorbic acid (vitamin C) and beta-carotene (vitamin A) were assayed. Lipid peroxidation (LPO) and reactive oxygen species (ROS) were also quantified. Carbendazim exposure had no effect on body weight, serum LH and prolactin. However, testis weight, serum testosterone and estradiol were significantly decreased. In addition to this, Leydig cellular activities of steroidogenic enzymes such as 3beta-HSD, 17beta-HSD, antioxidant enzymes SOD, CAT, GPx, GR, GST, gamma-GT, G-6-PDH and non-enzymatic antioxidants such as GSH, vitamins E, C and A were significantly diminished, whereas LPO and ROS were markedly elevated. All these above-mentioned parameters from the animals after withdrawal of MBC treatment were similar to those of the control group. Thus, the present study suggests that chronic low dose treatment of MBC is capable of inducing reproductive toxicity through increased oxidative stress, but is transient and reversible upon withdrawal of treatment.
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PMID:Modulation of antioxidant defense system by the environmental fungicide carbendazim in Leydig cells of rats. 1748 93