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Precocious puberty

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https://www.readbyqxmd.com/read/29157487/contr%C3%A3-le-de-l%C3%A2-axe-gonadotrope-nouveaux-aspects-physiologiques-et-th%C3%A3-rapeutiques-control-of-the-gonadotrope-axis-new-physiologic-and-therapeutic-aspects
#1
L Maione, S Christin-Maître, P Chanson, J Young
The endocrine and exocrine functions of the gonads are controlled by the gonadotrope axis, whose master regulator is the hypothalamic decapeptide GnRH. The Kisspeptin/Neurokinin B (Kp/NkB) neuronendocrine system is the main physiologic regulator of GnRH neurons. The Kp/NkB system is currently considered the key mediator for the hypothalamic negative feedback exerted by sex steroids and prolactin, as well as by various metabolic signals. Intrinsic alterations or regulatory abnormalities of Kp/NkB system lead to various gonadotrope axis puberty and fertility dysfunctions...
October 2017: Annales D'endocrinologie
https://www.readbyqxmd.com/read/29156706/mkrn3-functions-as-a-novel-ubiquitin-e3-ligase-to-inhibit-nptx1-during-puberty-initiation
#2
Huifang Liu, Xiangxin Kong, Fengling Chen
Central precocious puberty (CPP) is attributed to the disorder of some trigger factors those can activate the hypothalamic-pituitary-gonadal axis controlled by GnRH neurons. Many recent studies reveal one of those trigger factors, Makorin ring finger protein 3 (Mkrn3), whose loss-of-function mutations are implicated in CPP. Although Mkrn3 contained zinc Ring finger domain is considered as a putative E3 ubiquitin ligase, its actual function is never reported. Here, our results demonstrated that in mice hypothalamus before and when puberty initiated, Mkrn3 expressed the reversed tendency with Nptx1, which is an important secreted protein for neuron development...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29147481/is-precocious-puberty-linked-to-hypothalamic-expression-of-arginine-phenylalanine-amide-related-peptide
#3
REVIEW
Yuanyuan He, Wen Sun, Jian Yu
The up-regulation and down-regulation of gonadotropin-releasing hormone (GnRH) in central precocious puberty is not yet known. However, recent advances in neuroendocrinology have shown the controlling role of arginine-phenylalanine RF-amide-related peptides (RFRPs) on GnRH secretion in different phenomenon of reproduction such as estrus cycle and pregnancy, but the exact role of RFRPs in puberty and its related pathologic condition, precocious puberty, is not clear yet. This paper hypothesizes that RFRP is a regulatory peptide of puberty and might prevent the precocious puberty...
October 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29145926/corrigendum-to-increased-high-molecular-weight-adiponectin-but-decreased-total-adiponectin-and-kisspeptin-in-central-precocious-puberty-compared-with-aged-matched-prepubertal-girls
#4
Chantacha Sitticharoon, Maynart Sukharomana, Supawadee Likitmaskul, Malika Churintaraphan, Pailin Maikaew
The aim of the present study was to compare serum leptin, kisspeptin, total adiponectin, high molecular weight (HMW) adiponectin and neuropeptide Y (NPY) levels between girls with central precocious puberty (CPP; n=26, 7-9.5 years old) and age-matched controls (n=29) including or excluding obese girls. Leptin and NPY levels were comparable between CPP and control girls. Kisspeptin levels were lower in the CPP than control group, and were positively correlated with oestrogen in the control group and with systolic and diastolic blood pressure in the CPP group...
November 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29144249/effect-of-antiandrogen-aromatase-inhibitor-and-gonadotropin-releasing-hormone-analog-on-adult-height-in-familial-male-precocious-puberty
#5
Ellen Werber Leschek, Armando C Flor, Joy C Bryant, Janet V Jones, Kevin M Barnes, Gordon B Cutler
OBJECTIVE: Antiandrogen, aromatase inhibitor, and gonadotropin-releasing hormone analog (GnRHa) treatment normalizes growth rate and bone maturation and increases predicted adult height (AH) in boys with familial male-limited precocious puberty (FMPP). To evaluate the effect of long-term antiandrogen, aromatase inhibitor, and GnRHa on AH, boys with FMPP who were treated were followed to AH. STUDY DESIGN: Twenty-eight boys with FMPP, referred to the National Institutes of Health, were started on antiandrogen and aromatase inhibitor at 4...
November 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/29137163/association-between-small-fetuses-and-puberty-timing-a-systematic-review-and-meta-analysis
#6
REVIEW
Xu Deng, Wenyan Li, Yan Luo, Shudan Liu, Yi Wen, Qin Liu
Background: Epidemiological studies reporting the effect of small fetuses (SF) on puberty development have shown inconsistent results. Objective: To examine current study evidence and determine the strength and direction of the association between SF and puberty timing. Methods: PubMed, OVID, Web of Science, EBSCO, and four Chinese databases were searched from their date of inception to February 2016. All cohort studies that examined the association between SF and puberty timing in children were identified...
November 13, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29132462/-familial-male-limited-precocious-puberty-due-to-asp578his-mutations-in-the-lhcgr-gene-clinical-characteristics-and-gene-analysis-in-an-infant
#7
Min Wang, Min Li, Yue-Sheng Liu, Si-Min Lei, Yan-Feng Xiao
The aim of the study was to provide a descriptive analysis of familial male-limited precocious puberty (FMPP), which is a rare inherited disease caused by heterozygous constitutively activating mutations of the luteinizing hormone/choriogonadotropin receptor gene (LHCGR). The patient was a ten-month-old boy, presenting with penile enlargement, pubic hair formation, and spontaneous erections. Based on the clinical manifestations and laboratory data, including sexual characteristics, serum testosterone levels, GnRH stimulation test, and bone age, this boy was diagnosed with peripheral precocious puberty...
November 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29131093/metformin-for-rapidly-maturing-girls-with-central-adiposity-less-liver-fat-and-slower-bone-maturation
#8
Francis de Zegher, Cristina García Beltrán, Abel López-Bermejo, Lourdes Ibáñez
BACKGROUND/AIMS: Girls with low-birth weight (LBW) and postnatal weight catch-up tend to develop visceral and hepatic fat excess, which may be accompanied by an upregulated adrenarche with precocious pubarche (PP) and by a rapidly progressive puberty with early menarche and shorter stature. A pilot study suggested that metformin treatment for 4 years reduces central adiposity in LBW-PP girls and normalizes puberty and adult height. In this cohort, we studied the relationship between metformin treatment, bone maturation, and body composition...
November 7, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/29118987/massive-adrenal-incidentalomas-and-late-diagnosis-of-congenital-adrenal-hyperplasia-in-prostate-cancer
#9
Xin Feng, Gregory Kline
In a 61-year-old Caucasian male with prostate cancer, leuprolide and bicalutamide failed to suppress the androgens. He presented to endocrinology with persistently normal testosterone and incidental massive (up to 18 cm) bilateral adrenal myelolipomas on CT scan. Blood test did not reveal metanephrine excess. The patient was noted to have short stature (151 cm) and primary infertility. Elementary school photographs demonstrated precocious puberty. Physical examination revealed palpable abdominal (adrenal) masses...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/29114697/effect-of-gonadotropin-releasing-hormone-analogue-on-final-adult-height-among-jordanian-children-with-precocious-puberty
#10
Hala H Swaiss, Nahla M Khawaja, Oraib H Farahid, Anwar M Batieha, Kamel M Ajlouni
To study the effect of gonadotropin-releasing hormone analogue (GnRHa) on final adult height (FAH) among Jordanian children with central precocious puberty (CPP). Methods: It is a retrospective historical cohort study. We assessed the FAH and height gain in 43 children with CPP (39 females and 4 males) who received GnRHa and 13 children with CPP (11 females and 2 males) who did not receive GnRHa and achieved FAH between 2004 and 2014. Final adult height was compared to target height (TH) and mid- parental height (MPH) in both groups...
November 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/29104223/detection-of-rare-somatic-gnas-mutation-in-mccune-albright-syndrome-using-a-novel-peptide-nucleic-acid-probe-in-a-single-tube
#11
Fu-Sung Lo, Tai-Long Chen, Chiuan-Chian Chiou
McCune-Albright syndrome (MAS) is characterized by the triad of precocious puberty, café au lait pigmentation, and polyostotic fibrous dysplasia (FD) of bone, and is caused by post-zygotic somatic mutations-R201H or R201C-in the guanine nucleotide binding protein, alpha stimulating (GNAS) gene. In the present study, a novel peptide nucleic acid (PNA) probe with fluorescent labeling was designed to detect trace amounts of somatic mutant GNAS in a single tube reaction. The method was applied to screen GNAS mutations in six patients with MAS/FD...
November 1, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29094880/disorders-of-puberty-an-approach-to-diagnosis-and-management
#12
David A Klein, Jill E Emerick, Jillian E Sylvester, Karen S Vogt
Disorders of puberty can profoundly impact physical and psychosocial well-being. Precocious puberty is pubertal onset before eight years of age in girls and before nine years of age in boys. Patients with early isolated pubertal changes, prepubertal linear growth, and no worrisome neurologic symptoms typically have a benign pattern of development and should be monitored in the appropriate clinical context. Among patients with true precocious puberty, or full activation of the hypothalamic-pituitary-gonadal axis, most girls have an idiopathic etiology, whereas it is commonly due to identifiable pathology on imaging in boys...
November 1, 2017: American Family Physician
https://www.readbyqxmd.com/read/29050204/irreversible-growth-plate-fusions-in-children-with-medulloblastoma-treated-with-a-targeted-hedgehog-pathway-inhibitor
#13
Giles W Robinson, Sue C Kaste, Wassim Chemaitilly, Daniel C Bowers, Stephen Laughton, Amy Smith, Nicholas G Gottardo, Sonia Partap, Anne Bendel, Karen D Wright, Brent A Orr, William C Warner, Arzu Onar-Thomas, Amar Gajjar
The permanent defects in bone growth observed in preclinical studies of hedgehog (Hh) pathway inhibitors were not substantiated in early phase clinical studies of vismodegib in children. Consequently, vismodegib advanced into pediatric trials for malignancies suspected of being driven by aberrant activation of the Hh pathway. In one multicenter phase II trial, vismodegib was added to the therapy regimen for newly diagnosed Hh pathway activated medulloblastoma. Herein, we report on 3 children (2 on trial and one off trial) treated with vismodegib who developed widespread growth plate fusions that persist long after cessation of therapy...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29047327/integrative-testis-transcriptome-analysis-reveals-differentially-expressed-mirnas-and-their-mrna-targets-during-early-puberty-in-atlantic-salmon
#14
K O Skaftnesmo, R B Edvardsen, T Furmanek, D Crespo, E Andersson, L Kleppe, G L Taranger, J Bogerd, R W Schulz, A Wargelius
BACKGROUND: Our understanding of the molecular mechanisms implementing pubertal maturation of the testis in vertebrates is incomplete. This topic is relevant in Atlantic salmon aquaculture, since precocious male puberty negatively impacts animal welfare and growth. We hypothesize that certain miRNAs modulate mRNAs relevant for the initiation of puberty. To explore which miRNAs regulate mRNAs during initiation of puberty in salmon, we performed an integrated transcriptome analysis (miRNA and mRNA-seq) of salmon testis at three stages of development: an immature, long-term quiescent stage, a prepubertal stage just before, and a pubertal stage just after the onset of single cell proliferation activity in the testis...
October 18, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29029242/germ-cell-neoplasia-in-situ-and-preserved-fertility-despite-suppressed-gonadotropins-in-a-patient-with-testotoxicosis
#15
Li Juel Mortensen, Martin Blomberg Jensen, Peter Christiansen, Ann-Margrethe Rønholt, Anne Jørgensen, Hanne Frederiksen, John E Nielsen, Anand C Loya, Birgitte Grønkær Toft, Niels E Skakkebæk, Ewa Rajpert-De Meyts, Anders Juul
Context: Testotoxicosis is an autosomal dominant, male-limited disorder. Activating mutations in the Luteinizing Hormone Receptor gene (LHCGR) cause high autonomous testosterone secretion resulting in early-onset peripheral precocious puberty. Little is known about long-term consequences of testotoxicosis. Case Description: We present a rare case of a patient followed for 25 years with two remarkable outcomes; preserved fertility and germ cell neoplasia in situ (GCNIS)...
October 5, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29025205/diurnal-variation-of-gonadotropin-levels-in-girls-with-early-stages-of-puberty
#16
Yu Sun Kang, Dong-Yoon Yoo, In Hyuk Chung, Eun-Gyong Yoo
PURPOSE: Pubertal gonadotropin secretion shows circadian pattern and the luteinizing hormone (LH) levels tend to rise in later stages of puberty in girls. We studied the usefulness of basal LH in the evaluation of central precocious puberty with emphasis on the influence of sampling time. METHODS: Medical records of 334 girls that underwent gonadotropin-releasing hormone stimulation test (GnRHST) were reviewed. Auxological and laboratory data were compared between those with early morning (EM, before 10 AM) and late morning/afternoon (LM/A, after 10 AM) basal samples...
September 2017: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29025204/insulin-resistance-and-bone-age-advancement-in-girls-with-central-precocious-puberty
#17
Jin Ho Hur, Sora Park, Mo Kyung Jung, Seok Jin Kang, Ahreum Kwon, Hyun Wook Chae, Ho-Seong Kim, Duk Hee Kim
PURPOSE: Precocious puberty has significantly increased recently. While obesity is associated with puberty timing, the relationship between obesity and central precocious puberty (CPP) remains controversial. The purpose of this study was to determine whether insulin resistance is associated with bone age (BA) advancement in girls with CPP. METHODS: We retrospectively analyzed the records of 804 girls referred for puberty evaluation. Anthropometric measurements, BA, sex hormone, sex hormone binding globulin (SHBG), and insulin levels, lipid profiles, and gonadotropin releasing hormone stimulation tests were assessed...
September 2017: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28988223/makorin-ring-finger-3-gene-analysis-in-koreans-with-familial-precocious-puberty
#18
Hwal Rim Jeong, Hae Sang Lee, Jin Soon Hwang
BACKGROUND: Precocious puberty is known as an idiopathic, sporadic disease. Recently, specific mutations have been shown to cause familial central precocious puberty (CPP). The makorin ring finger 3 (MKRN3) gene plays a key role in puberty; loss-of-function mutations in the gene trigger familial CPP. To date, most described patients have been Western; few Asians with CPP have been documented. OBJECTIVE: To identify MKRN3 gene mutations or polymorphisms in Korean patients with familial CPP...
October 26, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28975428/a-new-efficient-method-to-monitor-precocious-puberty-nationwide-in-france
#19
Annabel Rigou, Joëlle Le Moal, Juliane Léger, Alain Le Tertre, Jean-Claude Carel
Clinical precocious puberty (PP) is a disease, reputed to be on the increase and suspected to be linked to endocrine disrupting chemicals (EDC) exposure. Population-based epidemiological data are lacking in France and scarce elsewhere. We accessed the feasibility of monitoring PP nationwide in France in this context, using a nationwide existing database, the French National Health Insurance Information System. Here, we present the method we used with a step-by-step approach to build and select the most suitable indicator...
October 3, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28973010/improved-final-predicted-height-with-the-injection-of-leuprolide-in-children-with-earlier-puberty-a-retrospective-cohort-study
#20
Yi-Chun Lin, Chih-Ying Lin, Siew-Yin Chee, Hung-Rong Yen, Fuu-Jen Tsai, Chiu-Ying Chen, Chung-Hsing Wang
The adult height of children with early onset puberty is limited by the premature maturation of hypothalamic-pituitary-gonadal axis. To evaluate the effects of gonadotropin-releasing hormone analog (GnRHa) treatment on the final height (FH) and bone maturation rate (BMR) in girls with early puberty (EP) or idiopathic central precocious puberty (ICPP), we examined data from girls who were diagnosed with EP or ICPP and underwent GnRHa (Leuplin Depot: 3.75 mg/month) at China Medical University Hospital, in Taiwan, between 2006 and 2015...
2017: PloS One
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