In this investigation, serum steroid hormones such as testosterone (T), 17β-estradiol (E2) and progesterone (P) in 12 female of the migratory population of Common carp (Cyprinus carpio) in southeast of Caspian Sea during a year from May 2011 to May 2012 were studied. The results of present study revealed that changes in levels of steroid hormones, (E2) and (T) were closely correlated to ovarian...

We present a report on two sisters who have 17 ƒ¿-hydroxylase deficiency with hyperaldosteronism. They have hypertension and hypergonadotropic hypogonadism. The steroid profiles suggest that they have 17 ƒ¿-hydroxylase deficiency. In contrast to the classical biochemical findings in 17 a-hydroxylase deficiency, both of these patients have hyperaldosteronism. Thus this report describes a new var...

Microsomal cytochrome P450c17 catalyzes both steroid 17 alpha-hydroxylase activity and scission of the C17-C20 steroid bond (17,20-lyase) on the same active site. Adrenal 17 alpha-hydroxylase activity is needed to produce cortisol throughout life, but 17,20-lyase activity appears to be controlled independently in a complex, age-dependent pattern. We show that human P450c17 is phosphorylated on ...

Experimental conditions for the measurement of prostatic androgen receptors occupied with unlabeled hormone are described. The assay allows quantitation of cytoplasmic and nuclear receptors occupied with unlabeled ligand by exchange with 17 beta-hydroxy-17 alpha-methyl [3H]estra-4,9,11-trien-3-one at 0 degrees C. The mercurial reagent mersalyl acid (0.2 mM) is used to promote dissociation of mo...

Two experiments were conducted to study the role of estradiol and progesterone in regulating steroid binding sites in sheep uterine myometrium. Exogenous estradiol increased the concentration of estradiol binding sites in nuclei and subsequently increased the total cell content of estradiol binding sites. Estradiol increased the number of progestogen binding sites (promegestone binding) and may...

Congenital adrenal hyperplasia can manifest itself in a variety of clinical and biochemical abnormalities (Bongiovanni and Root, 1963). The salt-losing tendency in some of these patients can be due to the absence of specific enzymes: dehydrogenases or hydroxylases (Bongiovanni and Root, 1963; Ulick et al., 1964; Visser and Cost, 1964). In addition to the impaired production of certain steroids,...

The hydrolysis of sulfate ester conjugates is frequently required prior to analysis for a range of analytical techniques including gas chromatography-mass spectrometry (GC-MS). Sulfate hydrolysis may be achieved with commercial crude arylsulfatase enzyme preparations such as that derived from Helix pomatia but these contain additional enzyme activities such as glucuronidase, oxidase, and reduct...

demonstrated the importance of this technic for the identification of steroids. This Atlas represents the important contributions to this field made by the Sloan-Kettering Institute Group, particularly the late Dr. Konrad Dobriner, and Dr. R. Norman Jones originally of Queen's University and now at laboratories of the National Research Council of Canada. As Dr. C. P. Rhoads points out in the in...

In this review, we focused on the intersection between steroid metabolomics, obstetrics and steroid neurophysiology to give a comprehensive insight into the role of sex hormones and neuroactive steroids (NAS) in the mechanism controlling pregnancy sustaining. The data in the literature including our studies show that there is a complex mechanism providing synthesis of either pregnancy sustainin...

The purpose of this study was to determine whether endotoxin decreased hepatic glucocorticoid binding by the action of mediator(s). Steroid binding in liver cytosol, plasma glucose levels, and plasma corticosterone levels were assayed in C3HeB/FeJ LPS normoresponsive and C3H/HeJ LPS hyporesponsive mice. In C3HeB/FeJ mice, endotoxin significantly depressed the maximum number of steroid binding s...