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Sexual hormones

Xueting Wang, Jie Ding, Zou Xiang, Peipei Jiang, Jing Du, Xiaodong Han
Microcystin-LR (MC-LR), which generates strong reproductive toxicity, reduces serum testosterone level without directly damaging Leydig cells. The purpose of this study was to identify the target cells of MC-LR in the rat hypothalamic-pituitary axis and to investigate the underlying mechanisms. We found that the gonadotropin-releasing hormone (GnRH) neurons were the direct target of MC-LR. In vivo results showed that upon exposure to rats, cells around the third ventricle of hypothalamus underwent apoptosis...
October 20, 2016: Toxicon: Official Journal of the International Society on Toxinology
Jae M Sevelius, Madeline B Deutsch, Robert Grant
INTRODUCTION: Globally, transgender ("trans") women are one of the key populations most disproportionately impacted by HIV. Pre-exposure prophylaxis (PrEP) is the newest and most promising biomedical HIV prevention intervention to date. This paper reviews relevant literature to describe the current state of the science and describes the potential role of PrEP among trans women, including a discussion of unique considerations for maximizing the impact of PrEP for this vulnerable population...
2016: Journal of the International AIDS Society
Waltraud Maierhofer, Emanuella Israel
The Fifty Shades trilogy by E.L. James has taken the world by storm and become a cultural phenomenon. The lack of contraceptive use in the erotic fiction, first pointed out by bloggers, is analysed in this article and compared to medical information. James may be praised for sexualising condom use. However, her protagonist makes poor choices in terms of hormonal contraception and is negligent about its use, resulting in an unintended pregnancy and resolved in marital bliss and motherhood. What is of more interest here than a possible message about contraceptive use, is the outcome that the fiction's negligence in birth control and responsibility affirms an ideology in which female sexuality and sexual experimentation can only be tolerated within the context of procreation and affirmation of motherhood...
October 20, 2016: Culture, Health & Sexuality
Karla Zanolla Dias de Souza, Fabiene Bernardes Castro Vale, Selmo Geber
OBJECTIVE: The objective of this study was to evaluate the efficacy of Tribulus terrestris for the treatment of hypoactive sexual desire disorder in postmenopausal women and evaluate its effect on the serum levels of testosterone. METHODS: We performed a prospective randomized, double-blinded, placebo-controlled study, during 18 months. A total of 45 healthy sexually active postmenopausal women reporting diminished libido were selected to participate in the study and were randomly assigned to receive 750 mg/d of T terrestris or placebo for 120 days...
October 10, 2016: Menopause: the Journal of the North American Menopause Society
Anita Strezova, Sheila O'Neill, Cathy O'Callaghan, Astrid Perry, Jinzhu Liu, John Eden
OBJECTIVE: This study explored the attitudes to, and experience of, menopause among Macedonian women living in Australia, including attitudes and responses to hormone therapy (HT) and complementary therapies, as well as related psycho-sexual, relationship and other midlife issues. METHODS: Using qualitative methodology, the study was based on seven unstructured, nondirective group discussions. Natural social groups were recruited, meeting wherever each group felt most at home...
October 10, 2016: Menopause: the Journal of the North American Menopause Society
Małgorzata Tomczyńska, Ireneusz Salata, Joanna Saluk
Autoimmune diseases occur with greater frequency in women than in men, suggesting that the mechanism of pathogenesis is conditioned by gender. So far not defined clearly factors responsible for the development and course of these diseases depending on sex. However, it was found there is a clear sexual dimorphism of the immune system, which may determine the process of autoimmunity. The causes of the increased incidence of women in autoimmune diseases are attributed to the action of the hormones estrogen, which can promote the process of autoimmunity and enhance the clinical symptoms of the disease...
September 29, 2016: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
D Francomano, A Ilacqua, A Cortese, G Tartaglia, A Lenzi, M Inghilleri, A Aversa
PURPOSE: Men affected by multiple sclerosis often experience neurogenic overactive bladder (OAB), lower urinary tract symptoms and erectile dysfunction (ED). The aim of the study was to investigate modifications of urinary and sexual functions after administration of daily tadalafil (TAD) 5 mg. METHODS: Twenty men were enrolled in a single-blind, 4-week prospective study while 10 men without treatment served as controls. Primary outcomes were changes from baseline of International Prostate Symptom (IPSS), OAB questionnaire (OAB-q-short form) and International Index of Erectile Function (IIEF-5) scores...
October 17, 2016: Journal of Endocrinological Investigation
Charli S Davies, Kendra N Smyth, Lydia K Greene, Debbie A Walsh, Jessica Mitchell, Tim Clutton-Brock, Christine M Drea
In vertebrates, reproductive endocrine concentrations are strongly differentiated by sex, with androgen biases typifying males and estrogen biases typifying females. These sex differences can be reduced in female-dominant species; however, even the most masculinised of females have less testosterone (T) than do conspecific males. To test if aggressively dominant, female meerkats (Suricata suricatta) may be hormonally masculinised, we measured serum androstenedione (A4), T and estradiol (E2) in both sexes and social classes, during both 'baseline' and reproductive events...
October 18, 2016: Scientific Reports
Virginia Mela, Sara Jimenez, Alejandra Freire-Regatillo, Vicente Barrios, Eva-María Marco, Ana-Belén Lopez-Rodriguez, Jesús Argente, María-Paz Viveros, Julie A Chowen
The neonatal leptin surge, occurring from postnatal day (PND) 5 to 13 and peaking at PND9 in rodents, is important for the development of neuroendocrine circuits involved in metabolic control and reproductive function. We previously demonstrated that treatment with a leptin antagonist from PND 5 to 9, coincident with peak leptin levels in the neonatal surge, modified trophic factors and markers of cell turnover and neuronal maturation in the hypothalamus of peri-pubertal rats. The kisspeptin system and metabolic neuropeptide and hormone levels were also modified...
October 14, 2016: Peptides
Raquel Ajo, Ana Segura, Laura Mira, María-Del-Mar Inda, Rocío Alfayate, Angel Sánchez-Barbie, César Margarit, Ana M Peiró
BACKGROUND: Opioids are an effective treatment for chronic non-malignant pain (CNP). Long-term use risks and side effects such as opioid-induced androgen deficiency (OPIAD) exist. This could be measured by saliva testosterone (Sal-T). OBJECTIVES: To evaluate OPIAD in long-term opioid use in CNP patients. METHODS: A cross-sectional study included CNP male outpatients under opioid treatment. Total-Testosterone (Total-T), Free-Testosterone (Free-T), Bio-Testosterone (Bio-T) and Sal-T were measured...
October 18, 2016: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
Rene Seiger, Andreas Hahn, Allan Hummer, Georg S Kranz, Sebastian Ganger, Michael Woletz, Christoph Kraus, Ronald Sladky, Alexander Kautzky, Siegfried Kasper, Christian Windischberger, Rupert Lanzenberger
Sex-steroid hormones are primarily involved in sexual differentiation and development and are thought to underlie processes related to cognition and emotion. However, divergent results have been reported concerning the effects of hormone administration on brain structure including side effects like brain atrophy and dementia. Cross-sex hormone therapy in transgender subjects offers a unique model for studying the effects of sex hormones on the living human brain. In this study, 25 Female-to-Male (FtM) and 14 Male-to-Female (MtF) subjects underwent MRI examinations at baseline and after a period of at least 4-months of continuous cross-sex hormone administration...
October 5, 2016: Psychoneuroendocrinology
N S Mehl, S Srisuwatanasagul, T Swangchan-Uthai, S Sirivaidyapong, M Khalid
Effect of a GnRH-agonist (deslorelin) was studied on reproductive function and ovarian luteinizing hormone receptor (LHR) and follicle stimulating hormone receptor (FSHR) expression in prepubertal female cats that were either implanted with 4.7-mg deslorelin (implanted: n = 6) or not (controls: n = 18) or ovariohysterectomized at prepubertal age (prepubertal OVH: n = 6). Body weights, fecal estradiol, and sexual behavior of implanted and control cats were monitored for 48 weeks followed by collection of ovaries and uteri...
September 9, 2016: Theriogenology
J L Yoost, R W Starcher, R A King-Mallory, N Hussain, C A Hensley, T W Gress
STUDY OBJECTIVE: To evaluate the use of telehealth to teach reproductive health to rural areas with high rates of teen pregnancy. DESIGN: Prospective cohort study SETTING: Two high schools in rural West Virginia. PARTICIPANTS: High school females that attended telehealth sessions. INTERVENTIONS: Teleconferencing equipment connected rural high schools to a distal academic institution. Telehealth sessions included reproductive health and life skills topics...
October 11, 2016: Journal of Pediatric and Adolescent Gynecology
Neal Patel, James A Kashanian
Normal thyroid physiology is paramount for the proper development and important for the maintenance of male reproduction. Both short- and long-term deviations in thyroid hormone levels have been shown to alter male reproductive function on a micro- and macroscopic level. Thyrotoxicosis and hypothyroidism are associated with changes in spermatogenesis, semen quality, levels of sexual hormones, and erectile function. However, the degree to which thyroid dysfunction is clinically responsible for male infertility has not been clearly elucidated...
October 14, 2016: Seminars in Reproductive Medicine
Veronica Gomez-Lobo, Anne-Marie Amies Oelschlager
Disorders (differences) of sexual development encompass a variety of conditions with atypical development of chromosomal, gonadal, or anatomic sex. Three of the most common differences of sex development conditions include congenital adrenal hyperplasia, complete androgen insensitivity, and Turner syndrome. Obstetrician-gynecologists who care for affected individuals in their practice must be familiar with the genetic, endocrine, and anatomic considerations of the most common conditions to provide optimal care...
October 6, 2016: Obstetrics and Gynecology
Min Wu, Qingxiong Yu, Qingfeng Li
Alopecia is a dermatological condition with limited therapeutic options. Only two drugs, finasteride and minoxidil, are approved by FDA for alopecia treatment. However, little is known about the differences in adverse effects between these two drugs. We examined the clinical reports submitted to the FDA Adverse Event Reporting System (FAERS) from 2004 to 2014. For both female and males, finasteride was found to be more associated with reproductive toxicity as compared to minoxidil. Among male alopecia cases, finasteride was significantly more concurrent with several forms of sexual dysfunction...
October 12, 2016: Oncotarget
Marianna Zanatelli, Ana M G Custodio, Manoel F Biancardi, Fernanda C A Santos, Rejane M Góes, Luiz R Falleiros-Jr, Patricia S L Vilamaior, Sebastião R Taboga
The female prostate is a reproductive gland that typically presents a morphology similar to that of the male gland and is highly developed in female Mongolian gerbils. Two main cell populations compose the epithelium gland: basal and secretory luminal cells. However, during postnatal development, diverse secretory cell phenotypes are distributed among the typical ones. Prostate homeostasis is under the control of sexual hormones, such as oestrogen and progesterone. After hormonal deprivation the female gland undergoes several morphophysiological changes...
October 14, 2016: Reproduction, Fertility, and Development
Kathryn R Klement, Ellen M Lee, James K Ambler, Sarah A Hanson, Evelyn Comber, David Wietting, Michael F Wagner, Valerie R Burns, Bert Cutler, Nadine Cutler, Elwood Reid, Brad J Sagarin
Participation in extreme rituals (e.g., fire-walking, body-piercing) has been documented throughout history. Motivations for such physically intense activities include religious devotion, sensation-seeking and social bonding. The present study aims to explore an extreme ritual within the context of bondage/discipline, dominance/submission and sadism/masochism (BDSM): the 'Dance of Souls', a 160-person ritual involving temporary piercings with weights or hooks attached and dancing to music provided by drummers...
October 14, 2016: Culture, Health & Sexuality
Beatriz D S F Bonamichi, Stella L M Santiago, Débora R Bertola, Chong A Kim, Nivaldo Alonso, Berenice B Mendonca, Tania A S S Bachega, Larissa G Gomes
P450 oxidoreductase deficiency (PORD) is a variant of congenital adrenal hyperplasia that is caused by POR gene mutations. The POR gene encodes a flavor protein that transfers electrons from nicotinamide adenine dinucleotide phosphate (NADPH) to all microsomal cytochrome P450 type II (including 21-hydroxylase, 17α-hydroxylase 17,20 lyase and aromatase), which is fundamental for their enzymatic activity. POR mutations cause variable impairments in steroidogenic enzyme activities that result in wide phenotypic variability ranging from 46,XX or 46,XY disorders of sexual differentiation, glucocorticoid deficiency, with or without skeletal malformations similar to Antley-Bixler syndrome to asymptomatic newborns diagnosed during neonatal screening test...
October 10, 2016: Archives of Endocrinology and Metabolism
F Lotti, G Corona, G Castellini, E Maseroli, M G Fino, M Cozzolino, M Maggi
STUDY QUESTION: Is sexual dysfunction associated with severity of semen quality impairment in men with couple infertility? SUMMARY ANSWER: In males of infertile couples the prevalence of erectile dysfunction (ED) increases as a function of semen quality impairment severity. WHAT IS KNOWN ALREADY: Infertile men are at a higher risk for sexual dysfunction, psychopathological and general health disorders. However, it has never been systematically investigated if these problems are associated with severity of semen quality impairment...
October 12, 2016: Human Reproduction
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