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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
#1
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...
February 23, 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
#2
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
#3
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
#4
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...
February 16, 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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
https://www.readbyqxmd.com/read/28089583/association-of-prenatal-and-childhood-pbde-exposure-with-timing-of-puberty-in-boys-and-girls
#12
Kim G Harley, Stephen A Rauch, Jonathan Chevrier, Katherine Kogut, Kimberly L Parra, Celina Trujillo, Robert H Lustig, Louise C Greenspan, Andreas Sjödin, Asa Bradman, Brenda Eskenazi
BACKGROUND: Polybrominated diphenyl ether (PBDE) flame retardants are endocrine-disrupting chemicals that exhibit estrogenic and androgenic properties and may affect pubertal timing. METHODS: Study subjects were participants between 1999 and 2013 in the Center for the Health Assessment of Mothers and Children of Salinas (CHAMACOS), a longitudinal cohort study of predominantly Mexican origin families in Northern California. We measured serum concentrations of four PBDEs (BDE-47, -99, -100, -153) in blood collected from mothers during pregnancy (N=263) and their children at age 9years (N=522)...
March 2017: Environment International
https://www.readbyqxmd.com/read/28065179/maternal-fish-oil-supplementation-during-lactation-is-associated-with-reduced-height-at-13-years-of-age-and-higher-blood-pressure-in-boys-only
#13
L Lauritzen, S E Eriksen, M F Hjorth, M S Nielsen, S F Olsen, K D Stark, K F Michaelsen, C T Damsgaard
Dietary long-chain n-3 PUFA (n-3 LCPUFA) in infancy may have long-term effects on lifestyle disease risk. The present follow-up study investigated whether maternal fish oil (FO) supplementation during lactation affected growth and blood pressure in adolescents and whether the effects differed between boys and girls. Mother-infant pairs (n 103) completed a randomised controlled trial with FO (1·5 g/d n-3 LCPUFA) or olive oil (OO) supplements during the first 4 months of lactation; forty-seven mother-infant pairs with high fish intake were followed-up for 4 months as the reference group...
December 2016: British Journal of Nutrition
https://www.readbyqxmd.com/read/28056656/age-and-pubertal-status-related-changes-in-reports-of-perception-of-personal-odors
#14
Lenka Martinec Nováková, Dagmar Plotěná, Jan Havlíček
As previously suggested, preferences for kin body odor might undergo an adaptive change over the course of puberty in order to avoid potential inbreeding, resulting in aversion to body odor of the opposite-gender kin as individuals mature sexually. However, studies based on mutual body odor aversion are rather inconclusive. We therefore investigated whether children's reports of individuals smelling good or bad differed as a function of age and pubertal status. We asked 219 children (94 male) aged 10 to 15 years to assess their pubertal development using a standardized measure and to name individuals they thought smelled good or bad...
January 1, 2017: Perception
https://www.readbyqxmd.com/read/28043239/longitudinal-synergies-between-cortisol-reactivity-and-diurnal-testosterone-and-antisocial-behavior-in-young-adolescents
#15
Elizabeth J Susman, Melissa K Peckins, Jacey L Bowes, Lorah D Dorn
The aims were to identify the correspondence between simultaneous, longitudinal changes in cortisol reactivity and diurnal testosterone and to test the hypothesis that cortisol reactivity and diurnal testosterone interact so as to influence antisocial behavior. Participants were 135 children and young adolescents assessed at 6-month intervals over 1 year. Upon enrollment girls were age 8, 10, or 12 years (N = 69, M = 10.06 years) and boys were age 9, 11, or 13 years (N = 66, M = 10.94 years). Assessments included Tanner staging by a nurse, cortisol reactivity (Trier Social Stress Test for Children), diurnal testosterone, and interviews and questionnaires...
January 3, 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/28038437/internalization-of-appearance-ideals-mediates-the-relationship-between-appearance-related-pressures-from-peers-and-emotional-eating-among-adolescent-boys-and-girls
#16
Katherine A Thompson, Nichole R Kelly, Natasha A Schvey, Sheila M Brady, Amber B Courville, Marian Tanofsky-Kraff, Susan Z Yanovski, Jack A Yanovski, Lauren B Shomaker
Appearance-related pressures have been associated with binge eating in previous studies. Yet, it is unclear if these pressures are associated with emotional eating or if specific sources of pressure are differentially associated with emotional eating. We studied the associations between multiple sources of appearance-related pressures, including pressure to be thin and pressure to increase muscularity, and emotional eating in 300 adolescents (Mage=15.3, SD=1.4, 60% female). Controlling for age, race, puberty, body mass index (BMI) z-score, and sex, both pressure to be thin and pressure to be more muscular from same-sex peers were positively associated with emotional eating in response to feeling angry/frustrated and unsettled (ps<0...
January 2017: Eating Behaviors
https://www.readbyqxmd.com/read/28024271/the-impact-of-the-severity-of-early-life-stress-on-diurnal-cortisol-the-role-of-puberty
#17
Lucy S King, Natalie L Colich, Joelle LeMoult, Kathryn L Humphreys, Sarah J Ordaz, Alexandria N Price, Ian H Gotlib
Researchers have documented dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis in children and adolescents who experienced early life stress (ELS). The precise nature of this dysregulation, however, has been difficult to discern. In fact, both elevated and blunted patterns of diurnal cortisol regulation have been reported in children and adolescents exposed to greater ELS, including both reduced and heightened cortisol levels and change in cortisol across the day. These divergent findings may be due to developmental changes in the relation between ELS and HPA-axis functioning...
November 24, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27997352/transdermal-testosterone-gel-for-induction-and-continuation-of-puberty-in-adolescent-boys-with-hepatic-dysfunction
#18
Maria F Contreras, Manish Raisingani, Kris Prasad, Bonita Franklin, Bina Shah
Treatment to induce puberty in boys is indicated in those who do not undergo spontaneous development at a normal age. Stimulating development of the secondary sex characteristics is possible using gradually increasing doses of testosterone esters (TEs) via intramuscular (IM) administration, which is the most widely used method of testosterone (T) supplementation. When TEs are administered as monthly injection, serum T levels exhibit large fluctuations with supraphysiologic levels seen immediately after the injection followed by a decrease into the low range...
January 1, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/27993449/growth-and-final-height-of-children-with-gaucher-disease-a-15-year-follow-up-at-an-israeli-gaucher-center
#19
Espen Mendelsohn, Amos Meir, Aya Abrahamov, Deborah Elstein, Ari Zimran, Floris Levy-Khademi
BACKGROUND: It is held that enzyme replacement therapy (ERT) accelerates the growth rate in children with Gaucher disease, but its effect on final height has not been established with certainty. This study presents final heights of Gaucher patients followed up for 15years. METHODS: The study included 41 adults with non-neuronopathic Gaucher disease. The final height of the patients and age at puberty was compared to their mid-parental target height and to their siblings' heights...
December 9, 2016: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/27992610/maternal-preeclampsia-and-androgens-in-the-offspring-around-puberty-a-follow-up-study
#20
Ingvild V Alsnes, Imre Janszky, Bjørn O Åsvold, Inger Økland, Michele R Forman, Lars J Vatten
BACKGROUND: Children born after preeclampsia may have a dominant androgen profile in puberty compared with other children. Circulating androgen concentrations at 11-12 years of age were compared between offspring born after preeclampsia, and children whose mothers did not have preeclampsia. METHODS: A total of 611 mother-offspring pairs were followed up 11 (daughters) or 12 (sons) years after birth: 218 pairs in the preeclampsia group, and 383 pairs without preeclampsia...
2016: PloS One
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