Anabolic androgenic steroids (AAS), synthetic testosterone derivatives that are used for ergogenic purposes, alter neurotransmission and behaviors mediated by GABA(A) receptors. Some of these effects may reflect direct and rapid action of these synthetic steroids at the receptor. The ability of other natural allosteric steroid modulators to alter GABA(A) receptor-mediated currents is dependent ...

Article history: Received on: 28/11/2012 Revised on: 17/12/2012 Accepted on: 24/12/2012 Available online: 29/12/2012 The effects of different anti-estrogenic chemicals were evaluated in guppy, Poecilia reticulata on sex differentiation and survival. New-born fry of the fish were fed diets containing genistein (1 gm kg), tamoxifen (100 mg kg), methanol extract of Basella alba (1 gm kg) and 17α-m...

Environmental Protection includes programs that are aimed to reducing risks the environment from hazardous materials and chemical wastes. Nowadays, 17α-ethinylestradiol, a synthetic estrogen, has become one of most commonly used active ingredients for oral contraception, interfere with normal functioning endocrine systems, thus affecting reproduction development in wildlife. The fresh water foo...

An important function of steroidogenic cytochromes P450 is the transformation of cholesterol to produce androgens, estrogens, and the corticosteroids. The activities of cytochrome P450c17 (CYP17) are essential in sex hormone biosynthesis, with severe developmental defects being a consequence of deficiency or mutations. The first reaction catalyzed by this multifunctional P450 is the 17α-hydroxy...

Background: 17α-hydroxylase deficiency is a rare cause of congenital adrenal hyperplasia and endocrine hypertension. Only around 124 cases were reported in literature. Case: A 35-year-old Taiwanese female presented with severe hypertension (220/130 mmHg), absence of secondary sexual characteristics and primary amenorrhea. Chromosome study revealed 46XX karyotye. The laboratory data revealed hyp...

To understand the sex reversal characteristics in the longtooth grouper (Epinephelus bruneus), this study examined the sex reversal and artificial masculinization of wild caught E. bruneus reared in indoor rearing tank after a 17α-methyltestosterone injection. To domesticate a broodstock, 64 wild caught E. bruneus, between 47.0 to 110.0 cm in total length and from 1.5 to 21.4 kg in body weight,...

Estrogen replacement therapy for postmenopausal women consists of an estrogenic and a progestagenic compound. The treatment has a positive estrogenic effect on bone, the cardiovascular system, and vagina but is dependent of the estrogen-progestagen balance in uterus to prevent unwanted proliferation. We were interested in the influence of estrogens and progestagens on estrogen metabolism in tar...

The in vitro effect of 17α, 20β-Dihydroxyprogesterone on the maturation of Persian sturgeon (Acipenser persicus) oocytes for 7, 10, 12, 24 and 30th hours of incubation were investigated. Blood serum, testosterone (T), progesterone (P4) and 17-β estradiol concentrations were measured using enzyme-linked immuno-sorbent assay (ELISA). The oocytes were incubated in SIS, RM2, L-15 and PSACF media in...

We determined whether a child with 17α-hydroxylase/17, 20-lyase deficiency possessed the sex-determining region (SRY) gene, and examined the mutations present in the CYP17A1 gene that led to 17α-hydroxylase/17, 20-lyase deficiency. In the child, karyotype analysis was performed and polymerase chain reaction analysis and electrophoretic techniques were used to identify the SRY gene. A total of 5...

Background: Antepartum hemorrhage and placenta previa effects majority of pregnant women endangering their life both maternal and fetal. Symptomatic placenta previa are being treated with tocolytic agents. Progesterone is the most common used drug for the preservation of pregnancy and aids in the extension of pregnancy. Materials and Methods: A 80 patients were randomly assigned to two groups u...