Slight differences in structure fundamentally change the effects, which can be corticoid, androgen, progestagen or estrogen. The latter 3 are called sex steroid hormones. Each type of sex steroid hormone is composed of a group of molecules, with slightly different effects. Sex steroid hormones are secreted by the ovary and by the adrenal gland. Oestrogens are the typical female hormone which wi...

OADES, R. D. Search and attention: Interactions of the hippocampal-septal axis, adrenocortical and gonadal hormones. NEUROSCI. BIOBEHAV. REV. 3(1) 31--48, 1979.--The phenomenon of attention is treated in terms of the ability to select some sensory input channels over others by the central nervous system for further processing and behavioural organisation. Studies of birds and mammals are review...

The response of plasma 17-hydroxycorticoids to corticotrophin has been determined using a simplified technique. Steroid levels appeared to be maximal four hours after the injection of 40 units of corticotrophin zinc. No response was obtained in cases of Addison's disease and a sluggish increase occurred in hypopituitarism. The effect of steroid therapy is discussed.

The relationship between urinary concentrations (free + sulfates + glucuronides) of the steroids testosterone (T), 11-ketotestosterone (11KT), 17 alpha, 20 beta-dihydroxy-4-pregnen-3-one (17, 20 beta-P) and 17 alpha, 20 alpha-dihydroxy-4-pregnen-3-one (17, 20 alpha-P), and the social behavior of males of the cichlid fish Oreochromis mossambicus was investigated. After 8 days of isolation none o...

Androgen and estrogen biosynthesis in mammals requires the 17,20-lyase activity of cytochrome P450 17A1 (steroid 17-hydroxylase/17,20-lyase). Maximal 17,20-lyase activity in vitro requires the presence of cytochrome b5 (b5), and rare cases of b5 deficiency in human beings causes isolated 17,20-lyase deficiency. To study the consequences of conditional b5 removal from testicular Leydig cells in ...

Introduction: The aim of this study was to evaluate the efficacy of combined intratympanic and systemic steroid therapy compared with systemic steroid therapy alone in idiopathic sudden sensorineural hearing loss (ISSNHL) patients with poor prognostic factors.     Materials and Methods: Seventy-seven patients with sudden sensorineural hearing loss (SSNHL) who had at least one poor prognostic fa...

INTRODUCTION It is difficult to evaluate the effect of drugs clinically used for idiopathic sudden sensorineural hearing loss, mainly because its underlying mechanism remains unknown. OBJECTIVE This study assessed the efficacy of hyperbaric oxygen therapy or ozone therapy in the treatment of idiopathic sudden sensorineural hearing loss, when either therapy was included with steroid treatment....

Numerous steroid hormones are present in the foetus but their potential to activate oestrogen receptor (ER) and/or is largely unknown. In this study, in vitro assays were developed to rapidly and specifically detect ER or ER activation by these steroid hormones. Our results showed that several oestrogen precursors and androgens are able to activate both ER and ER . Of special interest is that s...