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Early normal puberty

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https://www.readbyqxmd.com/read/29024822/pubertally-initiated-high-fat-diet-promotes-mammary-tumorigenesis-in-obesity-prone-fvb-mice-similarly-to-obesity-resistant-balb-c-mice
#1
Yirong Zhu, Mark D Aupperlee, Sandra Z Haslam, Richard C Schwartz
Premenopausal breast cancer is associated with increased animal fat consumption among normal-weight but not overweight women. Our previous findings in obesity-resistant BALB/c mice showed that a diet high in saturated animal fat (HFD) promotes mammary tumorigenesis in both DMBA carcinogenesis and Trp53-null transplant models. Having made these observations in BALB/c mice, which have very modest HFD weight gain, we determined the effects of HFD in FVB mice, which gain significant weight on HFD. Three-week-old FVB mice fed a low-fat diet or HFD were subjected to 7,12-dimethylbenz[a]anthracene-induced carcinogenesis...
October 9, 2017: Translational Oncology
https://www.readbyqxmd.com/read/29017168/enhanced-at-puberty-1-eap1-expression-critically-regulates-the-onset-of-puberty-independent-of-hypothalamic-kiss1-expression
#2
Chenxi Li, Pin Li
BACKGROUND/AIMS: Enhance at puberty-1 (Eap1) is an intronless gene that regulates the onset of puberty through a network of hypothalamic genes. However, precise mechanistic events essential for Eap1-regulation of puberty have not been fully elucidated. Eap1 is thought to promote the initiation of puberty through regulation of the hypothalamic metastasis-suppressor KiSS1. We aim to investigate this hypothesis by genetically perturbing Eap1 through RNA interference in vivo. METHODS: We first engineered and optimized four sets of shRNAs that target rat Eap1 mRNA as well as one negative control shRNA...
October 11, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28989027/hyperglycemic-condition-during-puberty-increases-collagen-fibers-deposition-in-the-prostatic-stroma-and-reduces-mmp-2-activity
#3
Sérgio Alexandre Alcantara Dos Santos, Elaine Manoela Porto Amorim, Larissa Mayume Ribeiro, Jaqueline Carvalho Rinaldi, Flávia Karina Delella, Luis Antonio Justulin, Sérgio Luis Felisbino
Puberty is an important period for the growth and maturation of the male reproductive system, and is also a critical window for endocrine or environmental interference. The physiological levels of circulating insulin and hyperglycemic control are important factors for a normal prostate growth. Hyperglycemia during puberty is reported to retard the growth of the prostate gland, with remarkable effects on the epithelial compartment. Here, we investigated the impact of hyperglycemia along with a simultaneous or late insulin replacement on the ventral prostate growth in rats during puberty, paying special attention to the deposition of collagen fibers and activities of gelatinase, matrix metalloproteinase-2 (MMP-2), and -9 (MMP-9)...
October 6, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28988578/alcohol-and-puberty
#4
William L Dees, Jill K Hiney, Vinod K Srivastava
Adolescence represents a vulnerable period for developing youth. Alcohol use and misuse are especially problematic behaviors during this time. Adolescents are more sensitive to alcohol and less tolerant of its detrimental effects than are adults. Research in humans and animals has revealed that early alcohol consumption can result in delayed pubertal development. Animal studies have shown that alcohol detrimentally affects neuroendocrine systems within the hypothalamic region of the brain that are associated with the normal, timely onset of the pubertal process...
2017: Alcohol Research: Current Reviews
https://www.readbyqxmd.com/read/28938419/nocturnal-urinary-excretion-of-fsh-and-lh-in-children-and-adolescents-with-normal-and-early-puberty
#5
Nanna Kolby, Alexander S Busch, Lise Aksglaede, Kaspar Sørensen, Jorgen Holm Petersen, Anna-Maria Andersson, Anders Juul
Context: Clinical use of single serum gonadotropin measurements in children is limited by the pulsatile section of FSH and LH. However, first morning voided (FMV) urine may integrate the fluctuating gonadotropin serum levels. Objective: We aimed to evaluate urinary and serum gonadotropin levels according to age, sex and pubertal stage in healthy children and to assess the clinical use of FMV urinary gonadotropins in children with disordered puberty. Design: Cross-sectional part of the COPENHAGEN Puberty study and longitudinal study of patients...
August 15, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28926827/one-year-follow-up-of-girls-with-precocious-puberty-and-their-mothers-do-psychological-assessments-change-over-time-or-with-treatment
#6
Melissa J Schoelwer, Kelly L Donahue, Paula Didrick, Erica A Eugster
BACKGROUND: To determine whether psychological characteristics of girls with variations of early puberty and their mothers change over time and with treatment in girls with central precocious puberty (CPP). METHODS: Girls with CPP, premature adrenarche (PA), and early normal puberty (ENP) completed psychological assessments at baseline and after 1 year along with their mothers. All girls with CPP were treated with GnRH analogs. Psychological effects of group and time were examined using 2 × 3 mixed ANOVAs...
September 19, 2017: Hormone Research in Pædiatrics
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
#7
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/28881544/-prospective-association-between-early-adiposity-rebound-and-adolescent-development-in-girls
#8
Y Sun, J Fang, R Yang, Y P Lai, J J Hu, X N Duan, P Y Su, Y H Wan, F B Tao
Objective: To determine possible relations between early adiposity rebound and adolescent development. Methods: Prospective children cohort from 2 kindergartens selected through clustering convenience sampling method in Anhui Province was established since Sep. 2010. Participants were classified as Cohort 1 (2010), Cohort 2 (2011) and Cohort 3 (2012) according to the recruiting year. Till Sep. 2015, a toal of 802 girls were included in this study, and received follow-up till primary school. During kindergarten period, physical examination was carried out every 3 months, 8 times in total...
September 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28821292/the-relationship-between-obesity-and-body-compositions-with-respect-to-the-timing-of-puberty-in-chongqing-adolescents-a-cross-sectional-study
#9
Fang He, Peiyu Guan, Qin Liu, Donna Crabtree, Linli Peng, Hong Wang
BACKGROUND: It is well known that excess adiposity during childhood may influence pubertal development. However, the extent to which body compositions vary in throughout puberty in boys and girls is currently unknown. The aim of this study was to investigate whether obesity and body compositions correlate with the timing of puberty in boys and girls. METHODS: By random cluster sampling, our study analyzed data from 1472 students (690 girls, 782 boys) aged 6-17 years from two schools in the Chongqing area...
August 18, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28774346/tall-stature-a-difficult-diagnosis
#10
REVIEW
Cristina Meazza, Chiara Gertosio, Roberta Giacchero, Sara Pagani, Mauro Bozzola
Referral for an assessment of tall stature is less common than for short stature. Tall stature is defined as a height more than two standard deviations above the mean for age. The majority of subjects with tall stature show a familial tall stature or a constitutional advance of growth (CAG), which is a diagnosis of exclusion. After a careful physical evaluation, tall subjects may be divided into two groups: tall subjects with normal appearance and tall subjects with abnormal appearance. In the case of normal appearance, the paediatric endocrinologist will have to evaluate the growth rate...
August 3, 2017: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/28742520/growth-and-pubertal-patterns-in-young-survivors-of-childhood-acute-lymphoblastic-leukemia
#11
Sarah Elitzur, Revital Houri-Shtrecher, Michal Yackobovitz-Gavan, Galia Avrahami, Shlomit Barzilai, Gil Gilad, Yael Lebenthal, Moshe Phillip, Batia Stark, Isaac Yaniv, Shlomit Shalitin
BACKGROUND: Survivors of acute lymphoblastic leukemia (ALL) may experience endocrine dysfunction. This study evaluated growth and pubertal patterns in survivors of childhood ALL. METHODS: Longitudinal assessment of anthropometric measurements and pubertal status was performed in a retrospective cohort of survivors (n=183). Median age at last endocrine visit was 16.1 years (range 8.2-27.6); median follow-up time was 8.7 years (range 3-21.4). RESULTS: Treatment with chemotherapy+prophylactic cranial radiation (pCRT, n=29) was associated with lower mean height standard deviation score (SDS) than chemotherapy alone (n=154) (p=0...
August 28, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
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
#12
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/28739556/a-comparative-analysis-of-plasma-amino-terminal-propeptide-of-c-type-natriuretic-peptide-nt-procnp-concentration-in-children-with-normal-weight-versus-obesity-during-growth
#13
Seda Topçu, Bayram Özhan, Afra Alkan, Mesut Akyol, Filiz Şimşek Orhon, Sevgi Başkan, Betül Ulukol, Merih Berberoğlu, Zeynep Şıklar, Lale Satıroğlu-Tufan, A. Çevik Tufan
OBJECTIVE: The relationship between plasma C-type natriuretic peptide (CNP) concentration and height velocity in children has long been studied, and CNP has been implicated as an emerging new growth marker during childhood. Recent studies reported that besides its well-studied role in growth, plasma CNP levels are reduced in adolescents with overweight and/or obesity suggesting CNP as a potential biomarker in childhood obesity. The primary goal of this study was to test this hypothesis in a Turkish population...
July 24, 2017: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/28721217/an-fsh-and-tsh-pituitary-adenoma-presenting-with-precocious-puberty-and-central-hyperthyroidism
#14
Guadalupe Vargas, Lourdes-Josefina Balcazar-Hernandez, Virgilio Melgar, Roser-Montserrat Magriña-Mercado, Baldomero Gonzalez, Javier Baquera, Moisés Mercado
A 19-year-old woman with a history of isosexual precocious puberty and bilateral oophorectomy at age 10 years because of giant ovarian cysts, presents with headaches and mild symptoms and signs of hyperthyroidism. Hormonal evaluation revealed elevated FSH and LH levels in the postmenopausal range and free hyperthyroxinemia with an inappropriately normal TSH. Pituitary MRI showed a 2-cm macroadenoma with suprasellar extension. She underwent successful surgical resection of the pituitary tumor, which proved to be composed of two distinct populations of cells, each of them strongly immunoreactive for FSH and TSH, respectively...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28711606/ovarian-aromatase-loss-of-function-mutant-medaka-undergo-ovary-degeneration-and-partial-female-to-male-sex-reversal-after-puberty
#15
Masatoshi Nakamoto, Yasushi Shibata, Kaoru Ohno, Takeshi Usami, Yasuhiro Kamei, Yoshihito Taniguchi, Takeshi Todo, Takashi Sakamoto, Graham Young, Penny Swanson, Kiyoshi Naruse, Yoshitaka Nagahama
Although estrogens have been generally considered to play a critical role in ovarian differentiation in non-mammalian vertebrates, the specific functions of estrogens during ovarian differentiation remain unclear. We isolated two mutants with premature stops in the ovarian aromatase (cyp19a1) gene from an N-ethyl-N-nitrosourea-based gene-driven mutagenesis library of the medaka, Oryzias latipes. In XX mutants, gonads first differentiated into normal ovaries containing many ovarian follicles that failed to accumulate yolk...
July 13, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28690987/the-influence-of-gonadotropin-releasing-hormone-agonist-treatment-on-the-body-weight-and-body-mass-index-in-girls-with-idiopathic-precocious-puberty-and-early-puberty
#16
Sung Woo Kim, Young Bae Kim, Jeong Eun Lee, Na Ri Kim, Weon Kyung Lee, Jae Kyun Ku, Eun Jeong Kim, Sun Hee Jung, Woo Yeong Chung
PURPOSE: This study aimed to investigate the influence of gonadotropin releasing hormone agonist (GnRHa) treatment on the weight and body mass index (BMI) of girls who were diagnosed with idiopathic central precocious puberty (CPP) or early puberty (EP). METHODS: Patients who were younger than 8 years of age at diagnosis were classified as CPP and patients aged between 8 and 9 years at diagnosis were classified as EP. Of 129 patients, 34 were diagnosed with CPP and 95 were diagnosed with EP...
June 2017: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28585695/the-rhogap-myo9b-promotes-bone-growth-by-mediating-osteoblastic-responsiveness-to-igf-1
#17
Brooke K McMichael, Yong-Hoon Jeong, Justin A Auerbach, Cheol-Min Han, Ryan Sedlar, Vikram Shettigar, Martin Bähler, Sudha Agarwal, Do-Gyoon Kim, Beth S Lee
The Ras homolog A (RhoA) subfamily of Rho guanosine triphosphatases (GTPases) regulates actin-based cellular functions in bone such as differentiation, migration, and mechanotransduction. Polymorphisms or genetic ablation of RHOA and some of its regulatory guanine exchange factors (GEFs) have been linked to poor bone health in humans and mice, but the effects of RhoA-specific GTPase-activating proteins (GAPs) on bone quality have not yet been identified. Therefore, we examined the consequences of RhoGAP Myo9b gene knockout on bone growth, phenotype, and cellular activity...
June 6, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28520646/relationship-between-pubertal-timing-and-chronic-nonspecific-pain-in-adolescent-girls-the-young-hunt3-study-2006-2008
#18
Barbro Kløven, Gry B Hoftun, Pål R Romundstad, Marite Rygg
The aim of this study was to examine a possible relationship between early puberty and chronic nonspecific pain in 13- to 18-year-old girls. All adolescents in Nord-Trøndelag County, Norway, were invited to participate in the Young-HUNT3 study (2006-2008). Of the invited girls, 81% answered the questionnaire and of these 3982 were 13 to 18 years of age. Menarche and perceived physical maturation were used as exposure measures. Early menarche was defined as <12 years, normal menarche as ≥12 and <14 years, and late menarche as ≥14 years...
May 16, 2017: Pain
https://www.readbyqxmd.com/read/28511077/clinical-and-laboratory-parameters-predicting-a-requirement-for-the-reevaluation-of-growth-hormone-status-during-growth-hormone-treatment-retesting-early-in-the-course-of-gh-treatment
#19
Dogus Vuralli, E Nazli Gonc, Z Alev Ozon, Ayfer Alikasifoglu, Nurgun Kandemir
OBJECTIVE: We aimed to define the predictive criteria, in the form of specific clinical, hormonal and radiological parameters, for children with growth hormone deficiency (GHD) who may benefit from the reevaluation of GH status early in the course of growth hormone (GH) treatment. DESIGN AND METHODS: Two hundred sixty-five children with growth hormone deficiency were retested by GH stimulation at the end of the first year of GH treatment. The initial clinical and laboratory characteristics of those with a normal (GH≥10ng/ml) response and those with a subnormal (GH<10ng/ml) response were compared to predict a normal GH status during reassessment...
June 2017: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/28504511/-intrauterine-growth-restriction-endocrinological-perspective-update-of-the-2007-version-arch-argent-pediatr-2007-105-1-71-73
#20
(no author information available yet)
Most children born with low weight or intrauterine growth restriction develop catch-up growth that allows them to reach a final height according to their genetic target height. However, in about 15% of children this growth is insufficient. In both, children who have adequate compensatory growth and therefore normal height and children who remain low in childhood, it is necessary to take into account that if puberty starts early, the final height could be compromised. Timely and appropriate intervention could improve it...
June 1, 2017: Archivos Argentinos de Pediatría
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