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Late Puberty

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https://www.readbyqxmd.com/read/28931963/-when-you-re-a-baby-you-don-t-have-puberty-understanding-of-puberty-and-human-reproduction-in-late-childhood-and-early-adolescence
#1
Lisa B Hurwitz, Alexis R Lauricella, Brianna Hightower, Iris Sroka, Teresa K Woodruff, Ellen Wartella
Basic knowledge of human reproduction can help youth prepare for puberty and make later classes focused on advanced reproductive health topics manageable. With the intention of potentially informing the creation of learning materials, we conducted a needs assessment among children ages 7 to 12 in our suburban Chicago community to ascertain their current understanding of, and beliefs and misconceptions about, human reproduction, and to determine their needs for additional reproductive health education. We held qualitative focus group interviews with local children...
August 2017: Journal of Early Adolescence
https://www.readbyqxmd.com/read/28926843/the-genetic-basis-of-delayed-puberty
#2
S R Howard, Leo Dunkel
<br>The genetic control of puberty remains an important but mostly unanswered question. Late pubertal timing affects over 2% of adolescents and is associated with adverse health outcomes including short stature, reduced bone mineral density and compromised psychosocial health. Self-limited delayed puberty (DP) is a highly heritable trait, which often segregates in an autosomal dominant pattern; however, its neuroendocrine pathophysiology and genetic regulation remain unclear. Some insights into the genetic mutations that lead to familial DP have come from sequencing genes known to cause GnRH deficiency, most recently via next generation sequencing, and others from large-scale genome wide association studies in the general population...
September 18, 2017: Neuroendocrinology
https://www.readbyqxmd.com/read/28924487/a-novel-stop-mutation-p-gln22-of-dax1-nr0b1-results-in-late-onset-x-linked-adrenal-hypoplasia-congenita
#3
Judith Gerards, Michael M Ritter, Elke Kaminsky, Andreas Gal, Wolfgang Hoeppner, Marcus Quinkler
DAX1 (NR0B1) is an orphan nuclear receptor, which plays an important role in development and function of the adrenal glands and gonads. Mutations in DAX1 cause X-linked adrenal hypoplasia congenita (X-linked AHC), which is characterized by adrenal insufficiency (AI) and hypogonadotropic hypogonadism (HHG). Affected boys present with adrenal failure usually in childhood and, later in life, with delayed puberty. However, patients with a late-onset form of X-linked AHC have also been described in the past years...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28919976/impacts-of-prenatal-nutrition-on-animal-production-and-performance-a-focus-on-growth-and-metabolic-and-endocrine-function-in-sheep
#4
REVIEW
Prabhat Khanal, Mette Olaf Nielsen
The concept of foetal programming (FP) originated from human epidemiological studies, where foetal life nutrition was linked to health and disease status later in life. Since the proposal of this phenomenon, it has been evaluated in various animal models to gain further insights into the mechanisms underlying the foetal origins of health and disease in humans. In FP research, the sheep has been quite extensively used as a model for humans. In this paper we will review findings mainly from our Copenhagen sheep model, on the implications of late gestation malnutrition for growth, development, and metabolic and endocrine functions later in life, and discuss how these implications may depend on the diet fed to the animal in early postnatal life...
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28882815/childhood-tolerance-of-severe-influenza-a-mortality-analysis-in-mice
#5
Freeman Suber, Lester Kobzik
During the 1918 influenza pandemic, children experienced substantially lower mortality than adults, a striking but unexplained finding. Whether this was due to enhanced resistance (reduced virus load) or better tolerance (reduced impact of infection) has not been defined. We found that prepubertal mice infected with H1N1 influenza virus also showed greater survival than infected pubertal mice, despite similar virus loads. Transcriptome profiling of infected lungs identified estrogen as a regulator of susceptibility in both sexes, and also linked better survival to late expression of IL-1beta...
September 7, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28873088/identifying-genetic-variants-that-affect-viability-in-large-cohorts
#6
Hakhamanesh Mostafavi, Tomaz Berisa, Felix R Day, John R B Perry, Molly Przeworski, Joseph K Pickrell
A number of open questions in human evolutionary genetics would become tractable if we were able to directly measure evolutionary fitness. As a step towards this goal, we developed a method to examine whether individual genetic variants, or sets of genetic variants, currently influence viability. The approach consists in testing whether the frequency of an allele varies across ages, accounting for variation in ancestry. We applied it to the Genetic Epidemiology Research on Adult Health and Aging (GERA) cohort and to the parents of participants in the UK Biobank...
September 2017: PLoS Biology
https://www.readbyqxmd.com/read/28859283/plasma-anti-m%C3%A3-llerian-hormone-profile-in-heifers-from-birth-through-puberty-and-relationship-with-puberty-onset
#7
Hossam El-Sheikh Ali, Go Kitahara, Toru Takahashi, Shogo Mido, Mohammed Sadawy, Ikuo Kobayashi, Koichiro Hemmi, Takeshi Osawa
The current study aimed to define the plasma profile of anti-Müllerian hormone (AMH) and follicle stimulating hormone (FSH) in heifers during postnatal life until achieving puberty, as defined by plasma progesterone (P4) profile, to demonstrate a relationship between AMH and age of puberty onset. Blood samples collected from 11 Japanese Black female calves within 1 week after birth (W 0) and then biweekly until the sixth week after puberty (WP 6) were assayed for AMH, FSH, and P4. The heifers were classified into two groups based on age of puberty onset: ≤42 weeks (early puberty group; EP, n = 4) and ≥44 weeks (late puberty group; LP, n = 7)...
July 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28837909/age-sex-and-gonadal-hormones-differently-influence-anxiety-and-depression-related-behavior-during-puberty-in-mice
#8
Josiah R Boivin, David J Piekarski, Jessica K Wahlberg, Linda Wilbrecht
Anxiety and depression symptoms increase dramatically during adolescence, with girls showing a steeper increase than boys after puberty onset. The timing of the onset of this sex bias led us to hypothesize that ovarian hormones contribute to depression and anxiety during puberty. In humans, it is difficult to disentangle direct effects of gonadal hormones from social and environmental factors that interact with pubertal development to influence mental health. To test the role of gonadal hormones in anxiety- and depression-related behavior during puberty, we manipulated gonadal hormones in mice while controlling social and environmental factors...
August 12, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28821968/near-adult-height-in-male-kidney-transplant-recipients-started-on-growth-hormone-treatment-in-late-puberty
#9
Silvia Gil, Mariana Aziz, Marta Adragna, Marta Monteverde, Alicia Belgorosky
BACKGROUND: Growth retardation and its impact on adult height is considered to be one of the most common complications in patients with chronic kidney disease (CKD). Treatment with recombinant human growth hormone (rhGH) has been effective in improving growth in kidney transplantation (KTx) patients, but little data are available on adult height in patients who began rhGh treatment in late puberty. METHODS: Near-adult height was evaluated in 13 KTx patients treated with rhGH [growth hormone group (GHGr); dose 9...
August 18, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28811741/consistency-and-variability-of-dna-methylation-in-women-during-puberty-young-adulthood-and-pregnancy
#10
Su Chen, Nandini Mukherjee, Vimala Devi Janjanam, S Hasan Arshad, Ramesh J Kurukulaaratchy, John W Holloway, Hongmei Zhang, Wilfried Karmaus
Prior DNA methylation (DNA-m) analyses have identified cytosine-phosphate-guanine (CpG) sites, which show either a significant change or consistency during lifetime. However, the proportion of CpGs that are neither significantly different nor consistent over time (indifferent CpGs) is unknown. We investigated the methylation dynamics, both longitudinal changes and consistency, in women from preadolescence to late pregnancy using DNA-m of peripheral blood cells. Consistency of cell type-adjusted DNA-m between paired individuals was assessed by regressing CpGs of subsequent age on the prior, stability by intraclass correlation coefficients (>0...
2017: Genetics & Epigenetics
https://www.readbyqxmd.com/read/28795005/participation-in-sports-in-relation-to-adolescent-growth-and-development
#11
REVIEW
Kelly A Brown, Dilip R Patel, Daphne Darmawan
Puberty is defined by physical growth, development of secondary sexual characteristics, and maturation of psychosocial skills. The initiation and rate of progression of pubertal events varies among adolescents, but pubertal changes occur in a predictable stepwise manner. Factors including individual differences in physical and psychosocial development, stage of development based on age (early, middle, and late), and the rate of pubertal development, may all contribute to the way in which adolescents experience sports activities...
July 2017: Translational pediatrics
https://www.readbyqxmd.com/read/28757148/transdiagnostic-psychiatric-disorder-risk-associated-with-early-age-of-menarche-a-latent-modeling-approach
#12
Jonathan M Platt, Natalie L Colich, Katie A McLaughlin, Dahsan Gary, Katherine M Keyes
BACKGROUND: Earlier age of pubertal maturation in females is associated with increased risk for mental health problems in adolescence, compared with on-time or later maturation. However, most investigations of pubertal timing and mental health consider risk for individual disorders and fail to account for comorbidity. A latent-modeling approach using a large, nationally representative sample could better explain the transdiagnostic nature of the consequences of early-onset puberty. METHODS: Data on age of menarche and mental disorders were drawn from a population-representative sample of adolescents (n=4925), ages 13-17...
July 6, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28750633/urinary-bisphenol-a-and-pubertal-development-in-chinese-school-aged-girls-a-cross-sectional-study
#13
Maohua Miao, Ziliang Wang, Xiaoqin Liu, Hong Liang, Zhijun Zhou, Hui Tan, Wei Yuan, De-Kun Li
BACKGROUND: Animal studies suggest that bisphenol A (BPA) may perturb pubertal development in females. However, evidence from human studies is limited. METHODS: This was a cross-sectional study to investigate the association between BPA exposure and pubertal development in school-aged girls. A total of 655 girls aged 9-18 years were selected from three schools in Shanghai, from May to June 2011. We collected one single spot urine sample from each girl. Urine BPA concentrations were measured by modified high-performance liquid chromatography and categorized according to LOD and the median of those above LOD...
July 27, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28746287/direct-anthropometry-of-repaired-bilateral-complete-cleft-lip-a-long-term-assessment
#14
David C Kim, John B Mulliken
BACKGROUND: Repair of bilateral complete cleft lip requires more than following a design in a textbook. The operative strategy should incorporate knowledge of anticipated nasolabial changes with growth. METHODS: Direct nasolabial anthropometry was recorded in 174 children with bilateral complete cleft lip before and immediately after primary repair. Serial measurements were taken in 66 Caucasian patients between the ages of 6 months and 15 years and compared to Farkas' normal values...
August 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28742508/clinical-characterization-of-a-novel-calcium-sensing-receptor-genetic-alteration-in-a-greek-patient-with-autosomal-dominant-hypocalcemia-type-1
#15
Anna Papadopoulou, Evangelia Gole, Katerina Melachroinou, Theoni Trangas, Evaggelia Bountouvi, Anastasios Papadimitriou
OBJECTIVE: Autosomal dominant hypocalcemia (ADH) is a rare familial or sporadic syndrome associated with activating mutations in the calcium sensing receptor (CaSR) gene. The aim of this study was to assess the functional significance of a novel CaSR mutation and, moreover, to present the clinical characteristics and the bone mineral density (BMD) progression from early childhood to late puberty in a patient with ADH. DESIGN: Genetic analysis of the CaSR gene was performed in a patient who presented in the neonatal period with hypocalcemic seizures and biochemical features of ADH...
April 2017: Hormones: International Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28738839/evolution-of-metabolic-alterations-5%C3%A2-years-after-early-puberty-in-a-cohort-of-girls-predisposed-to-polycystic-ovary-syndrome
#16
Soren Harnois-Leblanc, Andréanne Trottier, Samuel Leblanc, Marie-Claude Battista, David H Geller, Jean-Patrice Baillargeon
BACKGROUND: We and others have observed that young girls predisposed to polycystic ovary syndrome (PCOS) display defective insulin sensitivity, beta-cell function and non-esterified fatty acids (NEFA) suppressibility during early pubertal years, compared to controls. Our objective is to assess whether these differences in glucose and NEFA metabolisms persist after 5 years in late/post-puberty. METHODS: We conducted a prospective cohort study between 2007 and 2015 with 4-6 years of follow-up in an academic institution research center...
July 24, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28737870/analysis-of-acid-labile-subunit-and-its-usefulness-in-pediatrics
#17
REVIEW
Verónica E Zaidman
The acid-labile subunit (ALS) is an 85 kDa glycoprotein that belongs to the leucine-rich repeat superfamily. It mainly circulates in serum bound to a high molecular weight ternary complex. The main and most widely studied function of ALS is to prolong the half-life of the binary complex formed by insulin-like growth factors type 1 and 2 and its transport proteins 3 and 5. ALS serum levels are lower in neonates, reach a peak in late puberty, and then slowly decrease throughout adulthood. ALS deficiency has consequences on growth, hydrocarbon and bone metabolism, and, in some cases, it affects pubertal development...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28732535/case-report-rare-skeletal-manifestations-in-a-child-with-primary-hyperparathyroidism
#18
Maulee Hiromi Arambewela, Kamani Danushka Liyanarachchi, Noel P Somasundaram, Aruna S Pallewatte, Gamini L Punchihewa
BACKGROUND: Primary hyperparathyroidism (PHPT) is uncommon among children with an incidence of 1:300,000. This diagnosis is often missed in children in contrast to adults where it is detected at a pre symptomatic stage due to routine blood investigations. Etiology of PHPT can be due to adenoma, hyperplasia or rarely carcinoma. CASE PRESENTATION: A 12 year old Sri Lankan girl presented with progressive difficulty in walking since 1 year. On examination she had bilateral genu valgum...
July 21, 2017: BMC Endocrine Disorders
https://www.readbyqxmd.com/read/28708492/development-and-proliferation-of-feline-endometrial-glands-from-fetal-life-to-ovarian-cyclicity
#19
Mariana Lopez Merlo, Marcela Faya, Marcelo Priotto, Claudio Barbeito, Cristina Gobello
In this study it was determined the progression of uterine gland development from late gestation to puberty in domestic felids. Cell proliferation patterns for luminal (LE), glandular epithelium (GE) as well as stroma (S) were also described. Twenty-four uteri from female kittens: 45 and 65 days of gestation and 1 to 5, 8, 12, 16, 20 and 24 weeks postnatally were obtained. Uterine cross-sections were submitted for routine histological and immunohistochemical quantification of proliferating cell nuclear antigen (PCNA) techniques...
June 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28699265/effects-of-harsh-parenting-and-positive-parenting-practices-on-youth-aggressive-behavior-the-moderating-role-of-early-pubertal-timing
#20
Frances R Chen, Adrian Raine
Prior research indicates that early pubertal timing is associated with aggressive behavior, particularly in the context of adversity as postulated in the contextual amplification hypothesis. However, few studies have examined harsh parenting as the context for the effect of early pubertal timing. Even fewer studies have tested the interactive effect of early pubertal timing and positive parenting on aggressive behavior. In this study, we tested the proposition that early pubertal timing, contrary to the general conception of it as a vulnerability, indexed susceptibility, and thus early maturing individuals were affected more by their environment in a "for better and for worse" manner...
July 12, 2017: Aggressive Behavior
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