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https://www.readbyqxmd.com/read/28299573/mkrn3-levels-in-girls-with-central-precocious-puberty-and-correlation-with-sexual-hormone-levels-a-pilot-study
#1
Anna Grandone, Grazia Cirillo, Marcella Sasso, Carlo Capristo, Gianluca Tornese, Pierluigi Marzuillo, Caterina Luongo, Giuseppina Rosaria Umano, Adalgisa Festa, Ruggero Coppola, Emanuele Miraglia Del Giudice, Laura Perrone
PURPOSE: Recently, mutations of makorin RING-finger protein 3 (MKRN3) have been described in familial central precocious puberty. Serum levels of this protein decline before the pubertal onset in healthy girls and boys. The aim of the study is to investigate MKRN3 circulating levels in patients with central precocious puberty. METHODS: We performed an observational cross-sectional study. We enrolled 17 patients with central precocious puberty aged 7 years (range: 2-8 years) and breast development onset <8 years; 17 prepubertal control age-matched patients aged 6...
March 15, 2017: Endocrine
https://www.readbyqxmd.com/read/28286655/metabolic-endotoxaemia-related-inflammation-is-associated-with-hypogonadism-in-overweight-men
#2
Kelton Tremellen, Natalie McPhee, Karma Pearce
BACKGROUND: Obesity is associated with both impaired testosterone production and a chronic state of low grade inflammation. Previously it was believed that this inflammation was mediated by a decline in the immunosuppressive action of testosterone. However, more recently an alternative hypothesis (GELDING theory) has suggested that inflammation originating from the passage of intestinal bacteria into the circulation (metabolic endotoxaemia) may actually be the cause of impaired testicular function in obese men...
2017: Basic and Clinical Andrology
https://www.readbyqxmd.com/read/28284656/metabolic-syndrome-in-hiv-infected-middle-aged-women-on-antiretroviral-therapy-prevalence-and-associated-factors
#3
Lívia D Akl, Ana L R Valadares, Monica Jacques de Moraes, Aarão M Pinto-Neto, Bianca Lagrutta, Lúcia Costa-Paiva
OBJECTIVES: To determine the prevalence of metabolic syndrome (MetS) and its associated factors in a group of HIV-infected middle-aged women. METHODS: Cross-sectional study including 273 HIV-infected climacteric women of 40-60 years of age under care in two HIV outpatient reference centers in Brazil. Metabolic syndrome diagnosis was based on 2006 International Diabetes Federation criteria. Sociodemographic, clinical and behavioral factors were evaluated as well as HIV infection-related parameters...
March 8, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28281143/impact-of-the-fshb-gene-211g-t-polymorphism-on-male-gonadal-function
#4
L Tamburino, S La Vignera, V Tomaselli, R A Condorelli, L M Mongioì, A E Calogero
PURPOSE: The FSHB gene -211G/T polymorphism has been reported to modulate gene expression and to cause inter-individual differences in FSH serum levels in men. This study was undertaken to assess the functional relevance of this polymorphism on gonadotropin and total testosterone serum levels and sperm parameters in men from Eastern Sicily (Italy). METHODS: To accomplish this, 200 men with abnormal conventional sperm parameters or normozoospermia (according to the parameters of WHO 2010) were genotyped by TaqMan Assay...
March 9, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28277110/effect-of-normal-sperm-morphology-rate-nsmr-on-clinical-outcomes-for-rescue-icsi-r-icsi-patients
#5
Mingzhao Li, Hui Wang, Wei Li, Juanzi Shi
PURPOSE: To investigate whether the normal sperm morphology rate (NSMR) can affect the clinical outcomes of rescue-ICSI(R-ICSI) patients. METHODS: Based on different NSMR, the patients were divided into two groups as follows: NSMR < 4% and NSMR ≥ 4% group. Main outcomes compared were fertilization, cleavage, normal fertilization, high-quality embryo, transferrable embryo, no transferrable embryo cycles, implantation, clinical pregnancy and abortion rate...
March 3, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28272720/the-efficacy-of-modified-luteal-phase-support-with-intramuscular-progesterone-in-ivf-icsi-cycles-a-retrospective-observational-study
#6
A Conforti, I Strina, A Mollo, R Amoroso, V Marrone, C Alviggi, R Marci, G de Placido
OBJECTIVE: The use of gonadotropin-releasing hormone agonist for ovulation triggering has become an intriguing topic in the last few years. As long as adequate luteal phase support is provided, it may be a valuable alternative to standard hCG triggering, associated with a significant reduction in OHSS incidence. Several luteal phase support options have been proposed, but few studies have addressed the issue of the appropriate route for progesterone administration to women triggered with GnRHa...
February 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28270212/an-open-label-clinical-trial-to-investigate-the-efficacy-and-safety-of-corifollitropin-alfa-combined-with-hcg-in-adult-men-with-hypogonadotropic-hypogonadism
#7
Eberhard Nieschlag, Pierre-Marc G Bouloux, Barbara J Stegmann, R Ravi Shankar, Yanfen Guan, Anjela Tzontcheva, Christine McCrary Sisk, Hermann M Behre
BACKGROUND: Hypogonadotropic hypogonadism (HH) in men results in insufficient testicular function and deficiencies in testosterone and spermatogenesis. Combinations of human chorionic gonadotropin (hCG) and recombinant follicle-stimulating hormone (recFSH) have been successful in the treatment of HH. Corifollitropin alfa is a long-acting FSH-analog with demonstrated action in women seeking infertility care. The aim of this study was to investigate the efficacy and safety of corifollitropin alfa combined with hCG to increase testicular volume and induce spermatogenesis in men with HH...
March 7, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28262687/the-syndrome-of-central-hypothyroidism-and-macroorchidism-igsf1-controls-trhr-and-fshb-expression-by-differential-modulation-of-pituitary-tgf%C3%AE-and-activin-pathways
#8
Marta García, Raquel Barrio, Montserrat García-Lavandeira, Angela R Garcia-Rendueles, Adela Escudero, Esther Díaz-Rodríguez, Darya Gorbenko Del Blanco, Ana Fernández, Yolanda B de Rijke, Elena Vallespín, Julián Nevado, Pablo Lapunzina, Vilborg Matre, Patricia M Hinkle, Anita C S Hokken-Koelega, María P de Miguel, José Manuel Cameselle-Teijeiro, Manuel Nistal, Clara V Alvarez, José C Moreno
IGSF1 (Immunoglobulin Superfamily 1) gene defects cause central hypothyroidism and macroorchidism. However, the pathogenic mechanisms of the disease remain unclear. Based on a patient with a full deletion of IGSF1 clinically followed from neonate to adulthood, we investigated a common pituitary origin for hypothyroidism and macroorchidism, and the role of IGSF1 as regulator of pituitary hormone secretion. The patient showed congenital central hypothyroidism with reduced TSH biopotency, over-secretion of FSH at neonatal minipuberty and macroorchidism from 3 years of age...
March 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28237339/embryo-production-in-heifers-with-low-or-high-dry-matter-intake-submitted-to-superovulation
#9
Marcos R Mollo, Pedro L J Monteiro, Ricardo S Surjus, Aline C Martins, Alexandre F Ramos, Gerson B Mourão, Luiz H D Carrijo, Gláucio Lopes, Rodolfo Rumpf, Milo C Wiltbank, Roberto Sartori
This study investigated the influence of feed intake on superovulatory response and embryo production of Nelore heifers. Pubertal heifers were kept in a feedlot and were submitted to the same diets, but with different levels of feed consumption: High (1.7 M; n = 20) or Low (0.7 M; n = 19) feed intake. Heifers in the 1.7 M treatment consumed 170% (2.6% of body weight [BW] in dry matter) and the 0.7 M heifers ate 70% (1.1% of BW in dry matter) of a maintenance diet. After 7 wk on these diets, heifers were treated with eight decreasing doses of follicle-stimulating hormone (FSH) given every 12 h, totaling 133 mg Folltropin (Folltropin-V; Bioniche Animal Health, Canada) per heifer...
April 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28222406/leydig-cell-clustering-and-reinke-crystal-distribution-in-relation-to-hormonal-function-in-adult-patients-with-testicular-dysgenesis-syndrome-tds-including-cryptorchidism
#10
Rikke R Soerensen, Trine H Johannsen, Niels E Skakkebaek, Ewa Rajpert-De Meyts
OBJECTIVE: Testicular dysgenesis syndrome (TDS) comprises testicular germ cell cancer, cryptorchidism and some cases of male infertility and hypospadias, which can be linked to impairment of intrauterine gonadal development. Among histological signs of TDS, large Leydig cell (LC) clusters (micronodules) are frequently present. This study aimed to investigate possible associations of LC micronodules with the presence of Reinke crystals and hormonal function of LCs, the latter primarily reflected by serum concentrations of luteinising hormone (LH) and testosterone, in patients with TDS...
October 2016: Hormones: International Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28216160/effect-of-cortisol-on-gonadotropin-inhibitory-hormone-gnih-in-the-cinnamon-clownfish-amphiprion-melanopus
#11
Young Jae Choi, Hamid R Habibi, Gyung-Suk Kil, Min-Min Jung, Cheol Young Choi
Hypothalamic peptides, gonadotropin-releasing hormone (GnRH) and gonadotropin inhibitory hormone (GnIH), play pivotal roles in the control of reproduction and gonadal maturation in fish. In the present study we tested the possibility that stress-mediated reproductive dysfunction in teleost may involve changes in GnRH and GnIH activity. We studied expression of brain GnIH, GnIH-R, seabream GnRH (sbGnRH), as well as circulating levels of follicle stimulating hormone (FSH), and luteinizing hormone (LH) in the cinnamon clownfish, Amphiprion melanopus...
April 1, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28196547/validation-of-a-mathematical-model-of-the-bovine-estrous-cycle-for-cows-with-different-estrous-cycle-characteristics
#12
H M T Boer, S T Butler, C Stötzel, M F W Te Pas, R F Veerkamp, H Woelders
A recently developed mechanistic mathematical model of the bovine estrous cycle was parameterized to fit empirical data sets collected during one estrous cycle of 31 individual cows, with the main objective to further validate the model. The a priori criteria for validation were (1) the resulting model can simulate the measured data correctly (i.e. goodness of fit), and (2) this is achieved without needing extreme, probably non-physiological parameter values. We used a least squares optimization procedure to identify parameter configurations for the mathematical model to fit the empirical in vivo measurements of follicle and corpus luteum sizes, and the plasma concentrations of progesterone, estradiol, FSH and LH for each cow...
February 15, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28190662/prospective-ultrasonographic-and-endocrine-predictors-of-spermatogenic-onset-in-ram-lambs
#13
Pawel M Bartlewski, Jennifer L Giffin, Olutobi A Oluwole, Ann C Hahnel
The objective of this study was to examine testicular ultrasonographic characteristics and endocrine profiles in prepubescent ram lambs for correlations with the age at first detection of elongated spermatids (ESt age). Bi-weekly ultrasound examinations and weekly testicular biopsies began at 10 weeks of age or at the time that testicular volume reached 15cm(3), and continued until 1-2 weeks after Est's were first detected by histological examination of testicular biopsies in twenty-two spring-born Rideau Arcott×Polled Dorset lambs...
April 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28189123/impact-of-various-progestins-with-or-without-transdermal-testosterone-on-gonadotropin-levels-for-non-invasive-hormonal-male-contraception-a-randomized-clinical-trial
#14
M Zitzmann, J Rohayem, J Raidt, S Kliesch, N Kumar, R Sitruk-Ware, E Nieschlag
Although several progestins have been tested for hormonal male contraception, the effects of dosage and nature of various progestins on gonadotropin suppression combined with and without additional testosterone has not been performed in a comparative trial. The aim of this study was to evaluate the differential impact of four oral or transdermal progestins on the suppression of gonadotropins in healthy men: oral: cyproterone acetate (CPA), levonorgestrel (LNG), norethisterone acetate (NETA), and transdermal: Nestorone(®) (NES), all in combination with transdermal testosterone (T)...
February 11, 2017: Andrology
https://www.readbyqxmd.com/read/28187771/the-effect-of-estradiol-on-granulosa-cell-responses-to-fsh-in-women-with-polycystic-ovary-syndrome
#15
Michael V Homer, Marcus A Rosencrantz, Rana F Shayya, R Jeffrey Chang
BACKGROUND: The influence of estradiol (E2) on granulosa cell (GC) function has not been tested clinically in women with polycystic ovary syndrome (PCOS). The objective of this study is to determine if E2 influences GC responses to FSH in women with PCOS. METHODS: This is a two phase, single cohort study conducted over a 2-year period at a single academic center. Nine women with PCOS according to NIH criteria. In Phase 1, FSH stimulation of GC responses as measured by E2 and Inhibin B (Inh B) were assessed before and at 5 and 6 weeks after GnRH agonist administration...
February 10, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28186349/effect-of-gonadotropin-inhibitory-hormone-gnih-on-luteinizing-hormone-secretion-in-humans
#16
J T George, M Hendrikse, J D Veldhuis, I J Clarke, R A Anderson, R P Millar
Gonadotropin inhibitory hormone (GnIH, human homologue of RFRP-3) suppresses gonadotropin secretion in animal models, but its effects have not been studied in the human. OBJECTIVE: We tested the hypotheses that exogenous GnIH inhibits LH secretion a) in postmenopausal women, and b) in men concurrently administered exogenous kisspeptin. DESIGN: Following in vitro and in vivo pre-clinical studies to functionally characterize the GnIH peptide, a dose-finding study (human GnIH 1...
February 10, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28181328/protein-and-mrna-expression-of-follicle-stimulating-hormone-receptor-and-luteinizing-hormone-receptor-during-the-oestrus-in-the-yak-bos-grunniens
#17
S-D Huo, S-E Chen, R-J Long, J-T Yang, J-X Lu, R-X Zang, T-J Zhang, A Abudureyimu, J-L Liu, G-H Zhang, Y-Q Zhao, Z-R Ma
Follicle-stimulating hormone (FSH) and luteinizing hormone (LH) have a central role in follicle growth, maturation and oestrus, but no clear pathway in the seasonal oestrus of yak (Bos grunniens) has been found. To better understand the role of FSH and LH in seasonal oestrus in the yak, six yaks were slaughtered while in oestrus, and the pineal gland, hypothalamus, pituitary gland, and gonads were collected. Using real-time PCR and immunohistochemical assays, we determined the mRNA and protein expression of the FSH and LH receptors (FSHR and LHR) in these organs...
February 8, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28166985/in%C3%A2-vitro-growth-and-maturation-of-isolated-caprine-preantral-follicles-influence-of-insulin-and-fsh-concentration-culture-dish-coculture-and-oocyte-size-on-meiotic-resumption
#18
G M Silva, I R Brito, A D Sales, F L N Aguiar, A B G Duarte, V R Araújo, L A Vieira, D M Magalhães-Padilha, L F Lima, B G Alves, L B R Silveira, E G Lo Turco, A P Rodrigues, C C Campello, M B Wheeler, J R Figueiredo
The aims of this study were: (1) to evaluate the effect of different insulin concentrations, alone or in combination with either a fixed FSH concentration or increasing FSH concentrations on the in vitro culture of isolated caprine preantral follicles and (2) to analyze the efficiency of two IVM media and maturation culture systems (with or without coculture with in vivo grown oocytes) on the meiosis resumption. Secondary follicles were cultured for 18 days in a basic medium supplemented with low- or high-insulin concentration alone or with a fixed FSH concentration or with increasing FSH concentrations...
March 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28164072/leptin-and-adiponectin-levels-in-girls-with-central-precocious-puberty-before-and-during-gnrh-agonist-treatment
#19
Jae Won Yoo, Chun Woo Song, Han Hyuk Lim
PURPOSE: The effects of gonadotropin-releasing hormone agonist (GnRHa) treatment on the energy metabolism in girls with central precocious puberty (CPP) are controversial. We focused the changes and related factors of serum levels of leptin and adiponectin in girls with CPP before and during GnRHa treatment. METHODS: Thirty girls with idiopathic CPP were enrolled in the study. Their auxological data and fasting blood were collected at the baseline and after six months of GnRHa treatment...
December 2016: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28144163/association-between-telomere-length-and-cyp19-ttta-repetition-polymorphism-in-healthy-and-breast-cancer-diagnosed-women
#20
Blanca Murillo-Ortiz, Sandra Martínez-Garza, David Suárez García, Rosa Del Carmen Castillo Valenzuela, Juan Francisco García Regalado, Gerardo Cano Velázquez
INTRODUCTION: Several studies have reported an increase in breast cancer (BC) risk when patients are carriers of the CYP19 TTA polymorphism with ≥10 repeats; moreover, it has been reported that telomere length is associated with a higher susceptibility of developing cancer. OBJECTIVE: The objective of this study was to understand the relationship between CYP19 TTTA repetition polymorphism and telomere length and its effects on serum estradiol, estrone and follicle-stimulating hormone (FSH)...
2017: Breast Cancer: Targets and Therapy
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