No abstract available.
Androgens*

No abstract available.
Androgens*

No abstract available.
Androgens* ; Bone Density* ; Female ; Humans

Sexual arousal is an important factor for the success of sexual behavior, and regulated by the central nervous system, its underlying mechanism is very complicated. Androgen is the most important endocrine hormone in men, which is deeply involved in the whole process of male sexual response, but how it regulates male sexual arousal has not been fully clarified and remains one of the hotspots in current andrological research. Therefore, this paper presents an overview of the advances in the studies of the related role and mechanism of androgen in male sexual arousal. In the central nervous system, androgen regulates the release of dopamine neurotransmitters by binding androgen receptors or metabolizing neurosteroids, thus activating the brain reward system. Besides, androgen regulates the neuronal plasticity and spinous process formation in the neural circuit of sexual arousal to ensure successful activation and conduction of the neural circuit. However, the specific regulating mechanism of sexual arousal remains to be further explored.
Androgens ; Humans ; Male ; Sexual Arousal

Androgens remain the most effective and widely abused ergogenic drugs in sport. Although androgen doping has been prohibited for over 3 decades with a ban enforced by mass spectrometric (MS)-based urine testing for synthetic and exogenous natural androgens, attempts continue to develop increasingly complex schemes to circumvent the ban. A prominent recent approach has been the development of designer androgens. Such never-marketed androgens evade detection because mass spectrometry relies on identifying characteristic chemical signatures requiring prior knowledge of chemical structure. Although once known, designer androgens are readily detected and added to the Prohibited List. However, until their structures are elucidated, designer androgens can circumvent the ban on androgen doping. To combat this, in vitro androgen bioassays offer powerful new possibilities for the generic detection of unidentified bioactive androgens, regardless of their chemical structure. Another approach to circumvent the ban on androgen doping has been the development of indirect androgen doping, the use of exogenous drugs to produce a sustained increase in endogenous testosterone (T) production. Apart from estrogen blockers, however, such neuroendocrine active drugs mostly provide only transient increases in blood T. Finally the ban on androgen doping must allow provision for rare athletes with incidental, proven androgen deficiency who require T replacement therapy. The Therapeutic Use Exemption mechanism makes provision for such necessary medical treatment, subject to rigorous criteria for demonstrating a genuine ongoing need for T and monitoring of T dosage. Effective deterrence of sports doping requires novel, increasingly sophisticated detection options calibrated to defeat these challenges, without which fairness in sport is tarnished and the social and health idealization of sporting champions devalued.
Androgens ; administration & dosage ; Biological Assay ; Designer Drugs ; Doping in Sports ; Humans

Gynecomastia is the most common condition affecting the male breast due to enlargement of both ductal and stromal tissue. Growth of the male breast can be manifested at any age, but 40% of cases present in adolescent boys. The condition depends mainly on the balance between serum estrogens and androgens. Gynecomastia represents a source of embarrassment, and optimal correction is difficult to achieve. Numerous methods of gynecomastia repair are available. Our method is a combination of liposuction and the pull-through technique. The purpose of this treatment is to resect excess tissue and restore the normal chest contour with minimal scarring. We report a case of gynecomastia treated with a combination of tumescent liposuction and the pull-through technique.
Adolescent ; Androgens ; Breast ; Cicatrix ; Estrogens ; Gynecomastia ; Humans ; Lipectomy ; Male ; Thorax

MicroRNAs are a kind of small non-coding single-stranded RNA molecules that negatively regulate the gene expression by binding to imperfect complementary sites in the 3' untranslated region of targeted mRNAs at the post-transcriptional level. Aberrant expressions of some miRNAs like miR-221/222, miR-146a and miR-125b have been found to be significantly associated with androgen-independent progression of prostate cancer. By analyzing the aberrant expressions and regulation mechanisms of miRNAs in cell lines, tissues and peripheral blood samples, we hope to provide a new theoretic base for the clinical diagnosis and treatment of androgen-independent prostate cancer.
Androgens ; pharmacology ; Humans ; Male ; MicroRNAs ; metabolism ; Prostatic Neoplasms ; metabolism

One of the main current trends of andrology is the paradigm shift from disease-oriented to health-oriented andrology. One of the major tasks we are faced with now is to establish an holistic concept of male reproductive health, then, starting from the needs and demands of male reproductive health, to identify the scope of andrology, as well as to develop a new research priorities and agenda. The progress and perspective of three main areas in the field of health-oriented andrology, namely, molecular andrology, andrology for aging and environment and male reproduction, were briefly reviewed and discussed.
Aging ; physiology ; Androgens ; deficiency ; Andrology ; Environment ; Health ; Humans ; Male ; Reproduction

Partial androgen deficiency in aging males can be defined as a clincal condition characterized by a partial deficiency of androgen in blood and/or a decrease genomic sensitivity to testosterone or its active metabolites in target tissues. This state of hypogondism leads to a decline of physical energy, an altered state of well-being, a sexual dysfunction and various metabolic alterations. Testosterone supplement therapy can improve all these symptoms.
Aging ; physiology ; Androgens ; blood ; deficiency ; Humans ; Male ; Testosterone ; pharmacology

OBJECTIVE: To explore potential therapeutic targets other than androgen-deprivation treatment for prostate cancer by screening the proteins induced by androgen at palmitoylation modification level in LNCaP cells. METHODS: The LNCaP cells were treated with androgen (Methyltrienolone, R1881, 5 nmol/L) or dimethyl sulfoxide (DMSO) for 24 h, and then labeled with alkynyl palmitic acid Alk-C16 (100 μmol/L). After that, the cells were collected, lysed, the total protein was extracted, agarose beads labeled with azide (1 mmol/L) were added, and the click-chemistry reaction was carried out at room temperature for 1 h. The covalent bond formed by click-chemistry reaction of azide and alkynyl group was used to enrich the palmitoylated proteins on agarose beads. Label-free quantitation (LFQ) was used to compare the protein palmitoylation level of R1881 treated and untreated cells to screen the proteins induced by androgen at palmitoylation modification level. RESULTS: In this experiment, 907 potential palmitoylated proteins (mascot score>2, P<0.05) were identified, among which 430 proteins had LFQ values not zero at least twice. Among the 430 proteins, the palmitoylation levels of 92 candidates were increased by androgen treatment, and their LFQ values were significantly upregulated (>1.5-fold, P<0.05) in ≥2 samples of androgen-treated vs. untreated LNCaP cells. We also used the software of cytoscape to classify the 92 proteins, and found that the known functional proteins of them could be divided into three categories: metabolism related, protein folding related and translation initiation related. Among them, metabolism related proteins included lipid metabolism (6), glucose metabolism (7) and respiratory electron transport chain (8), and a small amount of amino acid metabolism (2) and other metabolism related proteins (2). Notably, the ratio of LFQ of cytochrome b-c1 complex subunit 2 (UQCRC2) was significantly (>3-fold, P<0.05) higher in androgen-treated cells compared with untreated cells, indicating that the palmitoylation level of UQCRC2 was enhanced by androgen most significantly than that of others. The second was long-chain acyl CoA dehydrogenase (ACADVL) related to lipid metabolism and glucose 6-phosphate dehydrogenase (PGD) related to glucose metabolism, but the LFQ ratio of them was less than 3-fold. CONCLUSION The research on palmitoylation mechanism of metabolism, especially the proteins related to respiratory electron transport chain, will provide a new guidance for the diagnosis and treatment of prostate cancer and the development of targeted drugs.
Androgen Antagonists ; Androgens ; Humans ; Lipoylation ; Male ; Prostatic Neoplasms