Read by QxMD icon Read

growth hormone and male infertility

Mónica Beatriz Frungieri, Ricardo Saúl Calandra, Soledad Paola Rossi
The pineal hormone melatonin regulates testicular function through the hypothalamic-adenohypophyseal axis. In addition, direct actions of melatonin in somatic cells of the testis have been described. Melatonin acts as a local modulator of the endocrine activity in Leydig cells. In Sertoli cells, melatonin influences cellular growth, proliferation, energy metabolism and the oxidation state, and consequently may regulate spermatogenesis. These data pinpoint melatonin as a key player in the regulation of testicular physiology (i...
May 31, 2017: International Journal of Molecular Sciences
Enrica Bianchi, Kim Boekelheide, Mark Sigman, Susan J Hall, Kathleen Hwang
Cryptorchidism or undescended testis (UDT) is a common congenital abnormality associated with increased risk for developing male infertility and testicular cancer. This study elucidated the effects of endogenous ghrelin or growth hormone secretagogue receptor (GHSR) deletion on mouse reproductive performance and evaluated the ability of ghrelin to prevent testicular damage in a surgical cryptorchid mouse model. Reciprocal matings with heterozygous/homozygous ghrelin and GHSR knockout mice were performed. Litter size and germ cell apoptosis were recorded and testicular histological evaluations were performed...
2017: PloS One
Grete Lottrup, Kirstine Belling, Henrik Leffers, John E Nielsen, Marlene D Dalgaard, Anders Juul, Niels E Skakkebæk, Søren Brunak, Ewa Rajpert-De Meyts
STUDY QUESTION: Do human adult Leydig cells (ALCs) within hyperplastic micronodules display characteristics of foetal LCs (FLCs)? SUMMARY ANSWER: The gene expression profiles of FLCs and all ALC subgroups were clearly different, but there were no significant differences in expressed genes between the normally clustered and hyperplastic ALCs. WHAT IS KNOWN ALREADY: LCs are the primary androgen producing cells in males throughout development and appear in chronologically distinct populations; FLCs, neonatal LCs and ALCs...
May 1, 2017: Molecular Human Reproduction
Kishore Sarma, Shubhadeep Roychoudhury, Sudipta Sankar Bora, Budheswar Dehury, Pratap Parida, Saurav Das, Robin Das, Chandrajit Dohutia, Sangeeta Nath, Bibhas Deb, Mahendra K Modi
Rapid growth of world population is one of the biggest challenges faced by the human race. Hormone based birth control often causes various side effects, as such development of non-hormonal based contraceptives is the need of the hour. A recent study revealed that temporary infertility without changing hormone levels can be attained by inhibiting Katanin p60 ATPase-containing subunit A-like 1 protein (KATNAL1) which is critical in sperm maturation in the testes. This study revealed that, KATNAL1 is a soluble protein retained in the cytoplasm having molecular weight of 55,392 Dalton...
January 16, 2017: Combinatorial Chemistry & High Throughput Screening
Fazlullah Khan, Kamal Niaz, Fatima Ismail Hassan, Mohammad Abdollahi
Sulfur mustard (SM) is a chemical warfare agent which is cytotoxic in nature, and at the molecular level, SM acts as DNA alkylating agent leading to genotoxic and reproductive effects. Mostly, the exposed areas of the body are the main targets for SM; however, it also adversely affects various tissues of the body and ultimately exhibits long-term complications including genotoxic and reproductive effects, even in the next generations. The effect of SM on reproductive system is the reason behind male infertility...
March 2017: Archives of Toxicology
Abdallah Mansur, Ariel Israel, Catherine M H Combelles, Michal Adir, Catherine Racowsky, Russ Hauser, Andrea A Baccarelli, Ronit Machtinger
STUDY QUESTION: Does bisphenol-A (BPA) affect gene expression in human membrana granulosa cells (MGC)? SUMMARY ANSWER: In vitro, short exposure to supra-physiological concentrations of BPA alters human MGC gene expression. WHAT IS KNOWN ALREADY: Exposure to BPA may interfere with reproductive endocrine signaling. In vitro studies, mostly in animal models, have shown an inverse correlation between exposure to BPA and follicular growth, meiosis, and steroid hormone production in granulosa cells...
February 2017: Human Reproduction
Chieh-Ying Wang, Ming-Chu Tang, Wen-Chi Chang, Kenryo Furushima, Chuan-Wei Jang, Richard R Behringer, Chun-Ming Chen
Bobby sox homolog (Bbx) is an evolutionally conserved gene, but its biological function remains elusive. Here, we characterized defects of Bbx mutant rats that were created by PiggyBac-mediated insertional mutagenesis. Smaller body size and male infertility were the two major phenotypes of homozygous Bbx mutants. Bbx expression profile analysis showed that Bbx was more highly expressed in the testis and pituitary gland than in other organs. Histology and hormonal gene expression analysis of control and Bbx-null pituitary glands showed that loss of Bbx appeared to be dispensable for pituitary histogenesis and the expression of major hormones...
September 2016: Biology of Reproduction
R M Salgado, M H Marques-Silva, E Gonçalves, A C Mathias, J G Aguiar, P Wolff
Male fertility can be evaluated through complete semen analysis. Plants belonging to the Tribulus genus are known for their role in enhancing sex hormone levels and semen quality. The aim of this study was to evaluate the effects of T. terrestris on semen quality and physiological parameters. Sixty-five men with abnormal semen evaluation were included in this study, in which they were prescribed with oral administration of Androsten(®) (250 mg of Tribulus terrestris dried extract per capsule). Body fat percentage, lean muscle mass gain, fluctuation in steroid hormone levels and all semen parameters were analysed during the period of treatment...
June 2017: Andrologia
Hyo Serk Lee, Yong-Seog Park, Joong Shik Lee, Ju Tae Seo
OBJECTIVE: Growth hormone and its mediator, insulin-like growth factor-1 (IGF-1), have been suggested to exert gonadotropic actions in both humans and animals. The present study was conducted to assess the relationship between serum IGF-1 concentration, seminal plasma concentration, and sperm parameter abnormalities. METHODS: A total of 79 men were enrolled in this study from December 2011 to July 2012 and were prospectively analyzed. Patient parameters analyzed included age, body mass index, smoking status, urological history, and fertility history...
June 2016: Clinical and Experimental Reproductive Medicine
L M Rudolph, G E Bentley, R S Calandra, A H Paredes, M Tesone, T J Wu, P E Micevych
Reproduction involves the integration of hormonal signals acting across multiple systems to generate a synchronised physiological output. A critical component of reproduction is the luteinising hormone (LH) surge, which is mediated by oestradiol (E2 ) and neuroprogesterone interacting to stimulate kisspeptin release in the rostral periventricular nucleus of the third ventricle in rats. Recent evidence indicates the involvement of both classical and membrane E2 and progesterone signalling in this pathway. A metabolite of gonadotrophin-releasing hormone (GnRH), GnRH-(1-5), has been shown to stimulate GnRH expression and secretion, and has a role in the regulation of lordosis...
July 2016: Journal of Neuroendocrinology
Hongjuan Fang, Jian Xu, Huanwen Wu, Hong Fan, Liyong Zhong
Klinefelter syndrome (KS) is the most common chromosomal aneuploidy in male population, which demonstrates an unusual association with acromegaly. We herein present a rare case involving the confirmation of KS 2 years after surgical treatment for acromegaly.A 27-year-old man presented with an acromegalic appearance. Endocrinological examination revealed a high growth hormone (GH) concentration, low testosterone concentration, and high follicle-stimulating hormone and luteinizing hormone concentration. Brain imaging revealed a 9 × 6 × 7- mm sellar low-density nodule suggestive of a microadenoma...
April 2016: Medicine (Baltimore)
Arianna Mareri, MariaLaura Iezzi, Alessia Salvatore, Claudio Ligas, Elvira D'Alessandro
Maleness associated with a 45,X karyotype is a rare condition in childhood. It is usually diagnosed in adult age because of infertility. We report a unique case of an unbalanced translocation t(Y;21) in a 14-year-old boy with 45,X karyotype referred because of short stature, thin habitus and puberty delay. Hormone analysis showed low serum levels of basal testosterone, insulin-like growth factor (IGF-I) and gonadotrophins. Diagnosis of GH deficiency and puberty delay were made. He was treated with human chorionic gonadotropin (hCG) and GH therapy, respectively, for 6 and 24 months...
July 1, 2016: Journal of Pediatric Endocrinology & Metabolism: JPEM
Kaisa M Kettunen, Riitta Karikoski, Riikka H Hämäläinen, Teija T Toivonen, Vasily D Antonenkov, Natalia Kulesskaya, Vootele Voikar, Maarit Hölttä-Vuori, Elina Ikonen, Kirsi Sainio, Anu Jalanko, Susann Karlberg, Niklas Karlberg, Marita Lipsanen-Nyman, Jorma Toppari, Matti Jauhiainen, J Kalervo Hiltunen, Hannu Jalanko, Anna-Elina Lehesjoki
Mulibrey nanism (MUL) is a rare autosomal recessive multi-organ disorder characterized by severe prenatal-onset growth failure, infertility, cardiopathy, risk for tumors, fatty liver, and type 2 diabetes. MUL is caused by loss-of-function mutations in TRIM37, which encodes an E3 ubiquitin ligase belonging to the tripartite motif (TRIM) protein family and having both peroxisomal and nuclear localization. We describe a congenic Trim37 knock-out mouse (Trim37(-/-)) model for MUL. Trim37(-/-) mice were viable and had normal weight development until approximately 12 months of age, after which they started to manifest increasing problems in wellbeing and weight loss...
2016: Biology Open
Huizhen Wang, Vladimir Butnev, George R Bousfield, T Rajendra Kumar
Follicle-stimulating hormone (FSH) is a gonadotrope-derived heterodimeric glycoprotein. Both the common α- and hormone-specific β subunits contain Asn-linked N-glycan chains. Recently, macroheterogeneous FSH glycoforms consisting of β-subunits that differ in N-glycan number were identified in pituitaries of several species and subsequently the recombinant human FSH glycoforms biochemically characterized. Although chemical modification and in vitro site-directed mutagenesis studies defined the roles of N-glycans on gonadotropin subunits, in vivo functional analyses in a whole-animal setting are lacking...
May 5, 2016: Molecular and Cellular Endocrinology
A Yaba, E R Bozkurt, N Demir
The mammalian target of rapamycin (TOR) has been implicated in the control of different stressors, growth factors, nutrients and hormones, participating in the control of key cellular functions. Controlling this many pathways poses mTOR signalling as a potential new target in new treatment strategies for multiple cancer types. mTOR components could potentially mislocated in tumour cells, which could lead to activation of signalling pathway that should not be active. Therefore, we aimed to show localisation of mTOR signal proteins in testicular seminoma...
August 2016: Andrologia
Min Kyung Yu, Mo Kyung Jung, Ki Eun Kim, Ah Reum Kwon, Hyun Wook Chae, Duk Hee Kim, Ho-Seong Kim
PURPOSE: In male patients with congenital adrenal hyperplasia (CAH), the presence of testicular adrenal rest tumors (TARTs) have been reported, however their prevalence and clinical manifestations are not well known. Untreated TARTs may lead to testicular structural damage and infertility. This study was conducted to investigate the prevalence of TARTs in male patients with CAH, and characterize the manifestations to identify contributing factors to TART. METHODS: Among 102 CAH patients aged 0-30 years, 24 male patients have been regularly followed up in our outpatient clinic at Severance Children's Hospital from January 2000 to December 2014...
September 2015: Annals of Pediatric Endocrinology & Metabolism
Lianhe Chu, Jianzhen Li, Yun Liu, Christopher H K Cheng
Using the transcription activator-like effectors nucleases-mediated gene knockout technology, we have previously demonstrated that LH signaling is required for oocyte maturation and ovulation but is dispensable for testis development in zebrafish. Here, we have further established the fshb and fshr knockout zebrafish lines. In females, fshb mutant is subfertile, whereas fshr mutant is infertile. Folliculogenesis is partially affected in the fshb mutant but is completely arrested at the primary growth stage in the fshr mutant...
December 2015: Molecular Endocrinology
Letteria Minutoli, Antonio Micali, Antonina Pisani, Domenico Puzzolo, Alessandra Bitto, Mariagrazia Rinaldi, Gabriele Pizzino, Natasha Irrera, Federica Galfo, Salvatore Arena, Giovanni Pallio, Anna Mecchio, Antonino Germanà, Daniele Bruschetta, Rosaria Laurà, Carlo Magno, Herbert Marini, Francesco Squadrito, Domenica Altavilla
Cadmium (Cd) causes male infertility. There is the need to identify safe treatments counteracting this toxicity. Flavocoxid is a flavonoid that induces a balanced inhibition of cyclooxygenase (COX)-1 and COX-2 peroxidase moieties and of 5-lipoxygenase (LOX) and has efficacy in the male genitourinary system. We investigated flavocoxid effects on Cd-induced testicular toxicity in mice. Swiss mice were divided into 4 groups: 2 control groups received 0.9% NaCl (vehicle; 1 ml/kg/day) or flavocoxid (20 mg/kg/day ip); 2 groups were challenged with cadmium chloride (CdCl2; 2 mg/kg/day ip) and administered with vehicle or flavocoxid...
November 2015: Toxicological Sciences: An Official Journal of the Society of Toxicology
V Ntala, B Asimakopoulos, S Veletza, E Alexandris, V Karachaiou, N Nikolettos
PURPOSE: The intracytoplasmic sperm injection (ICSI) outcome is depended mainly on oocyte quality. Cytokines and their receptors play a critical role in oocyte maturation, fertilization, and embryo implantation. The purpose of the study was to study the levels of vascular endothelial growth factors (VEGFA, VEGFR1, VEGFA) in follicular fluids (FF) women participating in ICSI-in vitro fertilization (IVF) cycles in relation to cycle's outcome. MATERIAL AND METHODS: One hundred and fifty three samples of 70 women participating in ICSI cycles were classified in three infertility groups: male factor, female factor, and low responders...
2015: Clinical and Experimental Obstetrics & Gynecology
Jannine D Cody, Courtney Sebold, Patricia Heard, Erika Carter, Bridgette Soileau, Minire Hasi-Zogaj, Annice Hill, David Rupert, Brian Perry, Louise O'Donnell, Jon Gelfond, Jack Lancaster, Peter T Fox, Daniel E Hale
Providing clinically relevant prognoses and treatment information for people with a chromsome18q deletion is particularly challenging because every unrelated person has a unique region of hemizygosity. The hemizygous region can involve almost any region of 18q including between 1 and 101 genes (30 Mb of DNA). Most individuals have terminal deletions, but in our cohort of over 350 individuals 23% have interstitial deletions. Because of this heterogeneity, we take a gene by gene approach to understanding the clinical consequences...
September 2015: American Journal of Medical Genetics. Part C, Seminars in Medical Genetics
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"