Three mixtures of steroids (1a+1b, 2a+2b and 3a+3b) and two flavonoid glycosides (4 and 5) were isolated from the ethanol extract of branches of Porcelia macrocarpa (Warm.) R. E. Fries (Annonaceae). The steroids ...

This review highlights the principal effects of steroid hormones at central and peripheral levels in the neuroendocrine axis. The data discussed highlight the principal role of oestrogens and testosterone in hormonal ...

Disulfated and trisulfated steroids have been synthesized from cholesterol and their acetylcholinesterase inhibitory activity has been evaluated. In our studies we have found that the activity was not only dependent on the ...

Steroid receptors are members of a subfamily of the nuclear receptor superfamily. They play a dual role of steroid hormone receptors and transcription factors. Actually, these receptors are steroid-activated transcription ...

Steroids have been a cornerstone in renal transplant immu- nosuppression. New immunosuppressive drugs have led to protocols using early steroid withdrawal or complete avoidance. A prospective protocol in 23 pediatric ...

A large amount of data on the mechanisms regulating cumulus-oocyte maturation in mammals has been generated in the last 20 years. It has been made clear that oocyte-secreted factors play a central role in the control of ...

Non-medical use of anabolic-androgenic steroids (AAS) has been reported in non-competitive athletes with the intention to improve physical appearance, particularly muscle size and definition. The misuse of AASdnamely, ...

Direct immersion SPME-GC-MS-MS was used for the analysis of steroids in water at part-per-trillion(ppt) and lower concentrations. The method was validated and extended to real sample analysis. The method were linear from ...

Counterfeiting and adulteration of pharmaceuticals is a prevalent problem worldwide and represents a major health risk to the population, with anabolic steroids being one of the main classes of drugs consumed and obtained ...