3beta hydroxysteroid dehydrogenase deficiency diagnosis

Mutations in the HSD3B2 gene cause 3β-HSD deficiency. The HSD3B2 gene provides instructions for making the 3β-HSD enzyme. This enzyme is found in the gonads and adrenal glands . The 3β-HSD enzyme is involved in the production of many hormones, including cortisol , aldosterone , androgens, and estrogen. Cortisol has numerous functions such as maintaining energy and blood sugar levels, protecting the body from stress, and suppressing inflammation. Aldosterone is sometimes called the salt-retaining hormone because it regulates the amount of salt retained by the kidney. The retention of salt affects fluid levels and blood pressure. Androgens and estrogen are essential for normal sexual development and reproduction.

International Adrenal Cortex Conference “Adrenal 2010” Wednesday, June 16, 2010 - Friday, June 18, 2010
Location: San Diego, California Description: This conference provided a forum for both new and established investigators to present their most recent work, highlighting new findings relevant to adrenal physiology, biochemistry and molecular biology, genetics, and medicine. It was anticipated that these discoveries would provide a framework for further understanding of the function of the adrenal gland and its contributions to health and disease.

This condition is inherited in an autosomal recessive pattern , which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition. Individuals who are genetically male and have two copies of a mutated gene in each cell are affected by 17-beta hydroxysteroid dehydrogenase 3 deficiency . People with two mutations who are genetically female do not usually experience any signs and symptoms of this disorder.

Cell extracts prepared anaerobically from Clostridium innocuum and Clostridium paraputrificum reduced delta 4-3-ketosteroids to 3 beta 5 beta and 3 alpha 5 beta derivatives, respectively. delta 4-3-Ketosteroid-5 beta-reductase (5 beta-reductase) from both organisms required NADH for activity. 5 beta-Reductase from C. innocuum had a pH optimum of . The substrate concentration at half-maximal reaction velocity was microM, and a specific activity of 17 nmol product formed/h per mg protein was determined using 4-pregnen-3,20-dione (progesterone) as a substrate. delta 4-3-Ketosteroid-5 beta-reductase from C. innocuum reduced progesterone and testosterone, but not 4-cholesten-3-one, to corresponding 3-keto-5 beta derivatives. A relative molecular (Mr) weight of 80 000 was estimated for 5 beta-reductase using HPLC-gel filtration chromatography. 3 beta-Hydroxysteroid dehydrogenase in cell extracts of C. innocuum was oxygen sensitive and required NADH for activity. An Mr of 80 000 was estimated for 3 beta-hydroxysteroid dehydrogenase. However, 5 beta-reductase and 3 beta-hydroxysteroid dehydrogenase activities were separated using an HPLC-DEAE chromatography technique.

3beta hydroxysteroid dehydrogenase deficiency diagnosis

3 beta hydroxysteroid dehydrogenase deficiency diagnosis

Cell extracts prepared anaerobically from Clostridium innocuum and Clostridium paraputrificum reduced delta 4-3-ketosteroids to 3 beta 5 beta and 3 alpha 5 beta derivatives, respectively. delta 4-3-Ketosteroid-5 beta-reductase (5 beta-reductase) from both organisms required NADH for activity. 5 beta-Reductase from C. innocuum had a pH optimum of . The substrate concentration at half-maximal reaction velocity was microM, and a specific activity of 17 nmol product formed/h per mg protein was determined using 4-pregnen-3,20-dione (progesterone) as a substrate. delta 4-3-Ketosteroid-5 beta-reductase from C. innocuum reduced progesterone and testosterone, but not 4-cholesten-3-one, to corresponding 3-keto-5 beta derivatives. A relative molecular (Mr) weight of 80 000 was estimated for 5 beta-reductase using HPLC-gel filtration chromatography. 3 beta-Hydroxysteroid dehydrogenase in cell extracts of C. innocuum was oxygen sensitive and required NADH for activity. An Mr of 80 000 was estimated for 3 beta-hydroxysteroid dehydrogenase. However, 5 beta-reductase and 3 beta-hydroxysteroid dehydrogenase activities were separated using an HPLC-DEAE chromatography technique.

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