Oxymetholone 50mg tablets

Oxymetholone is one of the anabolic steroids that has widely been used among teenagers and athletes to increase their muscle bulk. It has undesirable effects on male health and fertility. In this study, the therapeutic effects of platelet-rich plasma (PRP) on oxymetholone-induced testicular toxicity were investigated in adult albino rats. During the experiments, 49 adult male albino rats were divided into 4 main groups: Group 0 (donor group) included 10 rats for the donation of PRP, Group I (control group) included 15 rats, Group II included 8 rats that received 10 mg/kg of oxymetholone orally, once daily, for 30 days, and Group III included 16 rats and was subdivided into 2 subgroups (IIIa and IIIb) that received oxymetholone the same as group II and then received PRP once and twice, respectively. Testicular tissues of all examined rats were obtained for processing and histological examination and sperm smears were stained and examined for sperm morphology. Oxymetholone-treated rats revealed wide spaces in between the tubules, vacuolated cytoplasm, and dark pyknotic nuclei of most cells, as well as deposition of homogenous acidophilic material between the tubules. Electron microscopic examination showed vacuolated cytoplasm of most cells, swollen mitochondria, and perinuclear dilatation. Concerning subgroup IIIa (PRP once), there was a partial improvement in the form of decreased vacuolations and regeneration of spermatogenic cells, as well as a reasonable improvement in sperm morphology. Regarding subgroup IIIb (PRP twice), histological sections revealed restoration of the normal testicular structure to a great extent, regeneration of the spermatogenic cells, and most sperms had normal morphology. Thus, it is recommended to use PRP to minimize structural changes in the testis of adult albino rats caused by oxymetholone.

Abstract licence: CC BY 4.0

BackgroundDyskeratosis congenita (DC) is a multisystem syndrome characterized by mucocutaneous abnormalities, bone marrow failure, and predisposition to cancer. Studies over the last 25 years have led to the identification of 18 disease genes. These have a principal role in telomere maintenance, and patients usually have very short/abnormal telomeres. The advances have also led to the unification of DC with a number of other diseases, now collectively referred to as the telomeropathies or telomere biology disorders.What is coveredClinical features, genetics, and biology of the different subtypes. Expert view on diagnosis, treatment of the hematological complications and future.Expert viewAs these are very pleotropic disorders affecting multiple organs, a high index of suspicion is necessary to make the diagnosis. Telomere length measurement and genetic analysis of the disease genes have become useful diagnostic tools. Although hematological defects can respond to danazol/oxymetholone, the only current curative treatment for these is hematopoietic stem cell transplantation (HSCT) using fludarabine-based conditioning protocols. New therapies are needed where danazol/oxymetholone is ineffective and HSCT is not feasible.

Abstract licence: CC BY

Human adrenocortical H295R cells have been validated by the OECD Test Guideline 456 to detect chemicals disrupting testosterone and 17β-estradiol (estradiol) biosynthesis. This study evaluated a novel approach to detect disturbances of steroidogenesis in H295R cells, exemplified by prochloraz and five anabolic steroids. Steroid profiles were assessed by an untargeted LC-MS-based method, providing a relative quantification of 57 steroids annotated according to their accurate masses and retention times. Such a panel of steroids included several mineralocorticoids, glucocorticoids, progestins and adrenal androgens. The coverage of a high number of metabolites in this extended steroid profiling facilitated grouping of chemicals with similar effects and detecting subtler differences between chemicals. It allowed, for example, distinguishing between the effects of turinabol and oxymetholone, supposed to act similarly in a previous characterization including only nine adrenal steroids. Furthermore, the results revealed that product/substrate ratios can provide superior information on altered enzyme activities compared to individual metabolite levels. For example, the 17α-hydroxypregnenolone/pregnenolone ratio was found to be a more sensitive marker for detecting 17α-hydroxylase inhibition by prochloraz than the corresponding individual steroids. These results illustrate that chemical grouping and calculation of product/substrate ratios can provide valuable information on mode-of-action and help prioritizing further experimental work.

Abstract licence: CC BY

Doping control laboratories are responsible for the precise measurement of anabolic-androgenic steroids (AASs) and determination of athlete usage. Intact phase II AASs are difficult to analyze due to their low abundance in complex biological matrices and their structural similarities that convolute tandem mass spectrometry interpretation. Discovery efforts of unknown phase II metabolites of new-to-the-field steroids have been challenging due to these deficiencies in current analytical techniques. Several methods for determining unknown conjugated AAS compounds have been developed that include deuterium tagging, fractionation, derivatization, and utilization of synthesized standards. Ion mobility (IM), a rapid gas-phase separation, allows for improved molecular differentiation and provides additional information for analyzing intact phase II AASs without sacrificing throughput. Here, candidate metabolites were putatively identified for oxymetholone (OXM) and methyl-1-testosterone (M1T) utilizing liquid chromatography-ion mobility-mass spectrometry (LC-IM-MS) and two independent data analysis strategies: a fully untargeted approach using mass defect analysis and collision cross section (CCS) filtering and a pseudotargeted approach using the biologically anticipated isotopic envelope in conjunction with CCS filtering, temporal profiling, and tandem mass spectrometry confirmation. A proof-of-concept time-course study was conducted using the urine from healthy male individuals after steroid administration. The fully untargeted approach reduced the number of original features by >85% while the pseudotargeted approach reduced original features by >99%, yielding 11 possible novel phase II AAS candidates for OXM and 23 for M1T.

Abstract licence: CC BY