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https://www.readbyqxmd.com/read/28323923/genetic-variation-of-follicle-stimulating-hormone-action-is-associated-with-age-at-testicular-growth-in-boys
#1
Alexander S Busch, Casper P Hagen, Katharina M Main, Anita Pereira, Camila Corvalan, Kristian Almstrup, Veronica Mericq, Anders Juul
Context: Although genetic factors play a pivotal role in male pubertal timing, genome-wide association studies have identified only a small number of loci. Genetic variation of FSH action affects adult reproductive parameters and female pubertal timing. Objective: To investigate whether genetic variation affecting FSH action is associated with onset of puberty in boys. Design: Cross-sectional and longitudinal study of two cohorts of healthy boys...
February 27, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28318781/spinal-fusion-in-a-patient-with-fukuyama-congenital-muscular-dystrophy
#2
Kaori Hino, Mitsumasa Fukuda, Tadao Morino, Tadanori Ogata, Masanori Ito, Eiichi Ishii
Many studies have evaluated surgical treatments for spinal deformities in patients with neuromuscular disease. However, few reports have described patients with Fukuyama congenital muscular dystrophy (FCMD). A 13-year-old boy with FCMD was unable to sit for long periods or sleep in the supine position because of progressive scoliosis. His Cobb angle worsened from 27° to 41° in 5months. He underwent standard posterior spinal fusion and pedicle-screw-alone fixation from T5 to S1. Postoperatively, his Cobb angle improved from 41° to 25° without exacerbation for 2years...
March 16, 2017: Brain & Development
https://www.readbyqxmd.com/read/28299573/mkrn3-levels-in-girls-with-central-precocious-puberty-and-correlation-with-sexual-hormone-levels-a-pilot-study
#3
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/28287641/fertility-preservation-in-an-adolescent-boy-inducing-puberty-and-spermatogenesis-prior-to-elective-non-urgent-bone-marrow-transplantation
#4
C Ho, M Zacharin
No abstract text is available yet for this article.
March 13, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28285608/sex-differences-in-adolescents-glycaemic-and-insulinaemic-responses-to-high-and-low-glycaemic-index-breakfasts-a-randomised-control-trial
#5
Simon B Cooper, Karah J Dring, John G Morris, Ben E W Cousins, Maria L Nute, Mary E Nevill
During puberty young people undergo significant hormonal changes which affect metabolism and, subsequently, health. Evidence suggests there is a period of transient pubertal insulin resistance, with this effect greater in girls than boys. However, the response to everyday high and low glycaemic index (GI) meals remains unknown. Following ethical approval, forty adolescents consumed a high GI or low GI breakfast, in a randomised cross-over design. Capillary blood samples were taken during a 2-h postprandial period, examining the glycaemic and insulinaemic responses...
March 13, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28261833/diagnostic-utility-of-testosterone-priming-prior-to-dynamic-tests-to-differentiate-constitutional-delay-in-puberty-from-isolated-hypogonadotropic-hypogonadism
#6
Suja P Sukumar, Anil Bhansali, Naresh Sachdeva, Chirag Kamal Ahuja, Ujjwal Gorsi, Kush Dev Singh Jarial, Rama Walia
CONTEXT: Differentiation between constitutional delay in puberty (CDP) and isolated hypogonadotropic hypogonadism (IHH) during adolescence is a great clinical challenge and the available diagnostic tests are of limited value. OBJECTIVE: To study the effect of withdrawal of short term, low dose testosterone therapy (testosterone priming) on the discriminatory power of dynamic tests for hypothalamo-pituitary-testicular axis to differentiate CDP from IHH. DESIGN: A prospective study (n=30) consisting of 20 boys with delayed puberty (Group A) and 10 patients with IHH (Group B)...
March 5, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28257149/pubertal-testis-volume-age-at-pubertal-onset-and-adolescent-blood-pressure-evidence-from-hong-kong-s-children-of-1997-birth-cohort
#7
Man Ki Kwok, Gabriel M Leung, C Mary Schooling
OBJECTIVES: A warning from Health Canada suggests that testosterone increases blood pressure (BP). No evidence from large randomized controlled trials is available, and observational studies are confounded by ill-health lowering serum testosterone. To address the evidence gap, we assessed the association of pubertal testicular volume, as a reflection of testosterone production, with BP. METHODS: We examined whether testicular volume was associated with sex-, age-, and height-standardized BP z-score at ∼13 years in a population-representative Chinese birth cohort (n = 5195, 63% follow-up)...
March 3, 2017: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/28239958/differential-sex-effects-of-systolic-blood-pressure-and-ldl-c-on-type-2-diabetes-life-course-data-from-the-bogalusa-heart-study
#8
Benjamin D Pollock, Wei Chen, Emily W Harville, Tian Shu, Vivian Fonseca, Franck Mauvais-Jarvis, Tanika N Kelly, Lydia A Bazzano
BACKGROUND: There may be sex-specific cardiometabolic mechanisms early in life that affect the development of type 2 diabetes (T2DM) through mid-adulthood. Yet, there have been few studies examining whether early life-course interactions between cardiometabolic risk factors and sex are associated with incident T2DM. METHODS: We followed n = 7,725 children from the Bogalusa Heart Study through mid-adulthood to examine whether low-density lipoprotein-cholesterol (LDL-C), high-density lipoprotein-cholesterol (HDL-C), body mass index (BMI), or systolic blood pressure (SBP) differentially impact the risk of T2DM for females versus males...
February 27, 2017: Journal of Diabetes
https://www.readbyqxmd.com/read/28238482/effect-of-weight-loss-on-puberty-onset-in-overweight-children
#9
Thomas Reinehr, Christina Bosse, Nina Lass, Juliane Rothermel, Caroline Knop, Christian Ludwig Roth
OBJECTIVE: To assess the impact of weight changes on the onset of puberty in overweight children. STUDY DESIGN: We evaluated the timing of puberty onset in 160 prepubertal overweight children (aged 11.2 ± 1.0 years) depending on the changes of their weight status in a 1-year lifestyle intervention. We determined body mass index (BMI), pubertal stage, luteinizing hormone (LH), follicle-stimulating hormone, insulin-like growth factor (IGF)-1, insulin-like growth factor binding protein-3, insulin resistance index homeostatic model assessment, and serum gonadotropins at baseline and 1 year later...
February 24, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28231067/the-association-of-peripubertal-serum-concentrations-of-organochlorine-chemicals-and-blood-lead-with-growth-and-pubertal-development-in-a-longitudinal-cohort-of-boys-a-review-of-published-results-from-the-russian-children-s-study
#10
Oleg Sergeyev, Jane S Burns, Paige L Williams, Susan A Korrick, Mary M Lee, Boris Revich, Russ Hauser
Organochlorine chemicals and lead are environmental exposures that have endocrine disrupting properties (EDCs) which interfere with many aspects of hormone action. Childhood and adolescence are windows of susceptibility for adverse health effects of EDCs. Our ongoing study, the Russian Children's Study (RCS), is one of the few longitudinal studies investigating the impact of EDCs on growth and puberty in boys. It is conducted in the historically contaminated city of Chapaevsk, in the Samara region. The study focuses on evaluating the associations of persistent organochlorine chemicals and lead with growth and pubertal timing...
March 1, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/28215580/deviant-peers-as-a-mediator-of-pubertal-timing-substance-use-associations-the-moderating-role-of-parental-knowledge
#11
Kristine Marceau, Kristina Jackson
PURPOSE: Early perceived pubertal timing and faster maturation have been linked to increased risk of adolescent substance use (SU), particularly for girls, but the mechanisms underlying this association are not well understood. We sought to replicate and extend findings from Westling et al. (2008) showing that peer deviance mediates the link between early puberty and SU with stronger pathways in the context of low parental knowledge of adolescents' whereabouts and activities. METHODS: Participants (n = 1,023; 52% female, 24% nonwhite, and 12% Hispanic) were recruited through middle schools...
February 15, 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/28209183/variants-in-congenital-hypogonadotrophic-hypogonadism-genes-identified-in-an-indonesian-cohort-of-46-xy-under-virilised-boys
#12
Katie L Ayers, Aurore Bouty, Gorjana Robevska, Jocelyn A van den Bergen, Achmad Zulfa Juniarto, Nurin Aisyiyah Listyasari, Andrew H Sinclair, Sultana M H Faradz
BACKGROUND: Congenital hypogonadotrophic hypogonadism (CHH) and Kallmann syndrome (KS) are caused by disruption to the hypothalamic-pituitary-gonadal (H-P-G) axis. In particular, reduced production, secretion or action of gonadotrophin-releasing hormone (GnRH) is often responsible. Various genes, many of which play a role in the development and function of the GnRH neurons, have been implicated in these disorders. Clinically, CHH and KS are heterogeneous; however, in 46,XY patients, they can be characterised by under-virilisation phenotypes such as cryptorchidism and micropenis or delayed puberty...
February 16, 2017: Human Genomics
https://www.readbyqxmd.com/read/28207416/are-aromatase-inhibitors-in-boys-with-predicted-short-stature-and-or-rapidly-advancing-bone-age-effective-and-safe
#13
Jessica A Ferris, Mitchell E Geffner
BACKGROUND: The aim of this study was to assess aromatase inhibitor (AI) efficacy in increasing predicted adult height (PAH) and to describe clinical and biochemical safety profiles of AI-treated boys. METHODS: A retrospective chart review was conducted at an academic children's hospital endocrinology clinic. Twenty-one boys with predicted short stature and/or rapidly advancing bone age, divided as Tanner stage (TS) I-III Group 1 (G1, n=9) and TS IV-V Group 2 (G2, n=12), were treated with AIs, either letrozole or anastrozole (mean duration, G1: 2...
March 1, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28164479/changes-in-inflammatory-markers-in-estonian-pubertal-boys-with-different-bmi-values-and-increments-a-3-year-follow-up-study
#14
Eva Mengel, Vallo Tillmann, Liina Remmel, Pille Kool, Priit Purge, Evelin Lätt, Jaak Jürimäe
OBJECTIVE: Serum inflammatory markers could help to identify those boys with overweight (OWB) who gain weight more extensively during puberty. This study aimed to examine the longitudinal changes in different serum inflammatory markers through puberty in boys with different BMI values and increments. METHODS: Twenty-six OWB and 29 normal-weight boys (NWB) were followed yearly for 3 years to measure changes in BMI and serum concentrations of 12 inflammatory markers...
February 6, 2017: Obesity
https://www.readbyqxmd.com/read/28164078/an-11-month-old-girl-with-central-precocious-puberty-caused-by-hypothalamic-hamartoma
#15
Da Young Yoon, Jae Hyun Kim
Central precocious puberty (CPP) is caused by premature activation of the hypothalamic-gonadal axis, and must be treated adequately. In particular, CPP that occurs at a relatively young age or in boys is likely to be caused by an organic lesion. Hypothalamic hamartoma (HH) is the most common organic cause of CPP. The present case report describes an 11-month-old female infant who presented with vaginal bleeding and rapidly progressive secondary sex characteristics from the age of 6 months. She was diagnosed with CPP following the detection of HH via magnetic resonance imaging...
December 2016: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28141708/an-8-year-old-biological-female-who-identifies-herself-as-a-boy-perspectives-in-primary-care-and-from-a-parent
#16
Leah Kern, Penn Edmonds, Ellen C Perrin, Martin T Stein
An 8-year 8-month-old biological female who self-identifies as a boy, Ricardo is brought by his mother for a well-child check to his new pediatrician. Ricardo and his mother report that he is doing well, but have concerns about the upcoming changes associated with puberty. Ricardo states that he is particularly afraid of developing breasts. His mother asks about obtaining a referral to a specialist who can provide "hormone therapy" to delay puberty.Ricardo was adopted from Costa Rica at the age of 2 as a healthy girl named "Angela...
February 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28139941/polymorphism-in-lrp5-rs556442-is-associated-with-higher-tg-levels-in-iranian-children
#17
Nima Montazeri-Najafabady, Mohammad Hossein Dabbaghmanesh, Gholamhossein Ranjbar Omrani, Forough Saki, Marzieh Bakhshayeshkaram
BACKGROUND: Wnt signaling/LRP5 is involved in adipogenesis by down-regulating adipogenic transcription factors. Therefore polymorphisms in components of this pathway may lead to metabolic disorders. AIM: In this study, we tested the impact of LRP5 polymorphism on lipid profile in Iranian children. METHODS: The study population was comprised of 9-18 year old children (125 boys, 137 girls). Total cholesterol (TC), High Density Lipoprotein (HDL), Low-Density Lipoprotein (LDL), Non HDL cholesterol and Triglyceride (TG) levels were checked...
January 31, 2017: Annals of Human Biology
https://www.readbyqxmd.com/read/28133361/a-longitudinal-analysis-of-the-impact-of-childhood-stress-on-weight-status-among-chinese-youth
#18
H C Tanenbaum, Y Li, J Q Felicitas-Perkins, M Zhang, P Palmer, C A Johnson, B Xie
Limited research has explored longitudinal impact of stress on negative health outcomes including overweight and obesity in Asian societies. Using data from a longitudinal school-based health promotion study conducted in Wuhan, China from 1999-2004, this study investigated the longitudinal effects of childhood stress exposure including stressors related to school, family, peers, violence, and health on overweight and obesity risk during the transition to adolescence among 2179 Chinese adolescents. Results showed that health stressors were consistently related to higher BMI Z score for both boys and girls baseline, it also predicted higher likelihood of overweight status over time for girls...
January 30, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28116043/gender-specific-differences-in-hypothalamus-pituitary-adrenal-axis-activity-during-childhood-a-systematic-review-and-meta-analysis
#19
REVIEW
Bibian van der Voorn, Jonneke J Hollanders, Johannes C F Ket, Joost Rotteveel, Martijn J J Finken
BACKGROUND: Gender-specific differences in hypothalamus-pituitary-adrenal (HPA) axis activity have been postulated to emerge during puberty. We conducted a systematic review and meta-analysis to test the hypothesis that gender-specific differences in HPA axis activity are already present in childhood. METHODS: From inception to January 2016, PubMed and EMBASE.com were searched for studies that assessed non-stimulated cortisol in serum or saliva or cortisol in 24-h urine in healthy males and females aged ≤18 years...
2017: Biology of Sex Differences
https://www.readbyqxmd.com/read/28097202/distinct-effects-of-obesity-and-puberty-on-risk-and-age-at-onset-of-pediatric-ms
#20
Tanuja Chitnis, Jennifer Graves, Bianca Weinstock-Guttman, Anita Belman, Cody Olsen, Madhusmita Misra, Gregory Aaen, Leslie Benson, Meghan Candee, Mark Gorman, Benjamin Greenberg, Lauren Krupp, Timothy Lotze, Soe Mar, Jayne Ness, John Rose, Jennifer Rubin, Teri Schreiner, Jan Tillema, Amy Waldman, Moses Rodriguez, Charlie Casper, Emmanuelle Waubant
OBJECTIVE: The aim of this study was to examine the relative contributions of body mass index (BMI) and pubertal measures for risk and age of onset of pediatric MS. METHODS: Case-control study of 254 (63% female) MS cases (onset<18 years of age) and 420 (49% female) controls conducted at 14 U.S. Pediatric MS Centers. Sex- and age-stratified BMI percentiles were calculated using CDC growth charts from height and weight measured at enrollment for controls, and within 1 year of onset for MS cases...
December 2016: Annals of Clinical and Translational Neurology
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