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Onset puberty

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https://www.readbyqxmd.com/read/29164787/factors-related-to-duration-of-untreated-psychosis-of-first-episode-schizophrenia-spectrum-disorder
#1
Yong Qiu, Leijun Li, Zhaoyu Gan, Jihui Wang, Liangrong Zheng, Jiaoshi Zhao, Nianhong Guan, Qinling Wei
AIM: Duration of untreated psychosis (DUP) is associated with outcome and functioning. It is expected that scientists will find factors that modulate DUP, but thus far, research on this topic has shown inconsistent results. Furthermore, similar studies in China are insufficient. This study aims to explore social and clinical factors for DUP in South China and to learn the influence that family plays on DUP through their awareness of psychosis. METHODS: Participants included 216 patients with first episode schizophrenia spectrum disorder...
November 22, 2017: Early Intervention in Psychiatry
https://www.readbyqxmd.com/read/29161441/contributions-of-function-altering-variants-in-genes-implicated-in-pubertal-timing-and-body-mass-for-self-limited-delayed-puberty
#2
Sasha R Howard, Leonardo Guasti, Ariel Poliandri, Alessia David, Claudia P Cabrera, Michael R Barnes, Karoliina Wehkalampi, Stephen O'Rahilly, Catherine E Aiken, Anthony P Coll, Marcella Ma, Debra Rimmington, Giles S H Yeo, Leo Dunkel
Context: Self-limited delayed puberty (DP) is often associated with delay in physical maturation, but whilst highly heritable the causal genetic factors remain elusive. Genome-wide association studies of the timing of puberty have identified multiple loci for age of menarche (AAM) in females and voice break in males, particularly in pathways controlling energy balance. Objective/Main outcome measures: We aimed to assess the contribution of rare variants in such genes to the phenotype of familial DP...
November 16, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29144249/effect-of-antiandrogen-aromatase-inhibitor-and-gonadotropin-releasing-hormone-analog-on-adult-height-in-familial-male-precocious-puberty
#3
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/29142169/the-effects-of-ethylene-glycol-monomethyl-ether-on-female-reproductive-system-in-juvenile-rats
#4
Yoshikazu Taketa, Hiroshi Mineshima, Etsuko Ohta, Kyoko Nakano-Ito
Ethylene glycol monomethyl ether (EGME), which is widely used in various industrial products, is known for adverse effects on the reproductive system in adult rats. However, the effects of EGME on reproductive development in juvenile rats have not been demonstrated. In order to investigate the effects of EGME on the female reproductive system and pubertal development in juvenile rats, EGME was administered to female Sprague Dawley rats from postnatal day 21 to 41 at a dose level of 0, 50, 100, or 300 mg/kg...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/29137163/association-between-small-fetuses-and-puberty-timing-a-systematic-review-and-meta-analysis
#5
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/29128477/congenital-infiltrating-lipomatosis-of-the-face-case-report-with-presentation-of-a-new-multistep-surgical-approach
#6
Sofia Kalantary, Elke Van de Casteele, Nasser Nadjmi
PURPOSE: This report describes the first case of congenital infiltrating lipomatosis of the face (CIL-F) that was successfully managed with 2-jaw orthognathic surgery. MATERIALS AND METHODS: The patient was followed from 4 to 18 years of age. The multistep approach used consisted of a facelift-type procedure at 12 years to improve the soft tissue profile. At 13 years, the transverse maxillary deficiency was treated with transpalatal distraction. At 14 years, the patient underwent bimaxillary orthognathic surgery with a genioplasty...
October 16, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29112888/age-of-pubertal-onset-and-2nd-to-4th-digit-ratios-preliminary-findings
#7
Diane C Gooding, Blake H Chambers
BACKGROUND: The second to fourth digit ratio (2D:4D) is used as a marker of prenatal sex hormone exposure. The aim of this study was to evaluate the possible relation between digit ratio and age of pubertal onset. METHODS: Participants were 321 men and 202 women aged between 18 and 28 at the time of assessment who self-reported their onset of puberty (i.e., age at first conscious ejaculation or menarche). Participants' right and left digit lengths were measured from hand scans...
November 4, 2017: Early Human Development
https://www.readbyqxmd.com/read/29108899/kallmann-syndrome-phenotype-and-genotype-of-hypogonadotropic-hypogonadism
#8
M I Stamou, N A Georgopoulos
Isolated Gonadotropin-Releasing Hormone (GnRH) Deficiency (IGD) IGD is a genetically and clinically heterogeneous disorder. Mutations in many different genes are able to explain ~40% of the causes of IGD, with the rest of cases remaining genetically uncharacterized. While most mutations are inherited in X-linked, autosomal dominant, or autosomal recessive pattern, several IGD genes are shown to interact with each other in an oligogenic manner. In addition, while the genes involved in the pathogenesis of IGD act on either neurodevelopmental or neuroendocrine pathways, a subset of genes are involved in both pathways, acting as "overlap genes"...
November 3, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29103001/contraception-for-adolescents-with-disabilities-taking-control-of-periods-cycles-and-conditions
#9
REVIEW
Jane Dickson, Annette Thwaites, Lesley Bacon
The onset of puberty, periods and sexual relationships can be difficult for adolescents and parents. Adolescents with disabilities face a wide range of additional challenges (physical, mental, social and intellectual), which may impact the quality of their lives and those of their families and carers. Research on the use of contraception in young women with disabilities is limited, and clinicians have little practical guidance for best practice. This review article aims to summarise and assess the evidence and guidance for the use of contraception in this group, particularly with regard to management of menstrual and cyclical problems...
November 4, 2017: Journal of Family Planning and Reproductive Health Care
https://www.readbyqxmd.com/read/29094913/secondary-hypertension-discovering-the-underlying-cause
#10
Lesley Charles, Jean Triscott, Bonnie Dobbs
Most patients with hypertension have no clear etiology and are classified as having primary hypertension. However, 5% to 10% of these patients may have secondary hypertension, which indicates an underlying and potentially reversible cause. The prevalence and potential etiologies of secondary hypertension vary by age. The most common causes in children are renal parenchymal disease and coarctation of the aorta. In adults 65 years and older, atherosclerotic renal artery stenosis, renal failure, and hypothyroidism are common causes...
October 1, 2017: American Family Physician
https://www.readbyqxmd.com/read/29094880/disorders-of-puberty-an-approach-to-diagnosis-and-management
#11
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/29093685/bipolar-spectrum-disorders-in-male-youth-the-interplay-between-symptom-severity-inflammation-steroid-secretion-and-body-composition
#12
REVIEW
Andreas Walther, Marlene Penz, Daniela Ijacic, Timothy R Rice
The morbidity and societal burden of youth bipolar spectrum disorders (BSD) are high. These disorders are multisystemic in that adult populations there are clear interactions with inflammatory processes and steroidal physiological systems. There are much less data concerning these areas of study in youth populations with BSD. This is surprising given the association of youth-onset BSD with puberty and its associated physiological changes. In this mini-review, we overview the theoretical role of inflammatory processes and steroidal physiological systems in youth BSD, describe the greater literature in adult populations, detail the literature in youth populations when available, and overview current proposed molecular mechanistic pathways and interaction effects based on the available data...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29090468/clinicopathologic-characteristics-of-early-onset-becker-s-nevus-in-korean-children-and-adolescents
#13
Young J Kim, Mi R Roh, Ji H Lee, Jung I Na, Joo Y Ko, Joon M Jung, Jong H Lee, Sung E Chang
BACKGROUND: Becker's nevus (BN) presents as a hairy patch or plaque with or without proliferation of the dermal smooth muscles. BN has been described as acquired as found in a similar entity, congenital smooth muscle hamartoma (CSMH). This study was aimed at evaluating the clinicopathological aspects of BN in Korean cases in differential diagnosis with CSMH. METHODS: We performed a retrospective study of 103 patients histopathologically diagnosed as having BN or CSMH...
October 31, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/29083510/on-the-etiology-of-type-1-diabetes-physiological-growth-in-children-impacts-disease-progression
#14
REVIEW
Oskar Skog, Olle Korsgren
The prevailing view is that Type 1 Diabetes (T1D) develops as a consequence of a severe fall in beta-cell mass resulting from T-cell mediated autoimmunity. However, progression from islet autoantibody seroconversion to overt diabetes and finally to total loss of c-peptide production occurs in most affected subjects only slowly over many years or even decades. This slow disease progression should be viewed in relation to the total beta cell mass of only 0.2 - 1.5 g in non-diabetic adults. Focal lesions of acute pancreatitis with accumulation of leukocytes, often located around the ducts, are frequently observed in subjects with recent onset T1D and most patients display extensive periductal fibrosis, the end stage of inflammation...
October 30, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29077908/differential-impact-of-genetic-loci-on-age-at-thelarche-and-menarche-in-healthy-girls
#15
Alexander S Busch, Casper P Hagen, Maria Assens, Katharina M Main, Kristian Almstrup, Anders Juul
Context: Recent genetic studies have identified genetic variants associated with age at pubertal onset. While Genome wide association studies reported associations of several hundred genetic variants with timing of self-reported age at menarche, a recent clinical study focussed on genetic variation affecting FSH action and clinically determined age at thelarche. The observations appear to be incongruent as effect sizes varied substantially between the studies. Alternatively, this may point to a differential impact of specific genetic loci on distinct pubertal events...
October 25, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29076247/sexuality-and-sexual-health-among-female-youth-with-borderline-personality-disorder-pathology
#16
Katherine N Thompson, Jennifer Betts, Martina Jovev, Yolanda Nyathi, Emma McDougall, Andrew M Chanen
AIM: Borderline personality disorder (BPD) is a severe mental disorder that is characterized by unstable relationships, impulsive behaviours and identity disturbance. BPD usually has its onset between puberty and young adulthood and presents disproportionately among females in clinical settings. Taken together, this makes young women with BPD a particularly vulnerable group with regard to healthy psychosexual development. It was hypothesized that female youth with BPD pathology would be more likely to score worse on measures of sexual health and safety, and to show greater uncertainty in sexual identity formation...
October 27, 2017: Early Intervention in Psychiatry
https://www.readbyqxmd.com/read/29064856/bone-mass-development-from-childhood-into-young-adulthood-in-patients-with-childhood-onset-inflammatory-bowel-disease
#17
Gudmundur Vignir Sigurdsson, Susanne Schmidt, Dan Mellström, Claes Ohlsson, Jenny M Kindblom, Mattias Lorentzon, Robert Saalman
BACKGROUND: Children who have inflammatory bowel disease (IBD) have increased risk of low bone mineral density (BMD). There is a scarcity of information on BMD development through puberty and into young adulthood in patients with childhood-onset IBD. METHODS: We conducted a prospective longitudinal study of BMD in patients with childhood-onset IBD. In total, 74 children with IBD were followed into young adulthood, with a mean follow-up of 8.4 years. The BMD was assessed longitudinally using dual-energy X-ray absorptiometry of the lumbar spine, total hip and whole body, and related to anthropometric measures...
December 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29064384/association-between-obesity-and-puberty-timing-a-systematic-review-and-meta-analysis
#18
REVIEW
Wenyan Li, Qin Liu, Xu Deng, Yiwen Chen, Shudan Liu, Mary Story
This systematic review and meta-analysis examined the associations between obesity and puberty timing based on scientific evidence. Eight electronic databases were searched up to February 2017 for eligible studies, and two reviewers screened the articles and extracted the data independently. A total of 11 cohort studies with 4841 subjects met the inclusion criteria. Compared with the group of normal-weight girls, the obese group had more girls with menarche (RR: 1.87, 95% CI: 1.59-2.19, 2 studies). The number of girls with early puberty was significantly higher in the obese group than the normal weight group (RR: 2...
October 24, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29064078/defective-wnt3-expression-by-testicular-sertoli-cells-compromise-male-fertility
#19
Sayon Basu, Satya Pal Arya, Abul Usmani, Bhola Shankar Pradhan, Rajesh Kumar Sarkar, Nirmalya Ganguli, Mansi Shukla, Kamal Mandal, Surendra Singh, Kanchan Sarda, Subeer S Majumdar
Testicular Sertoli cells make a niche for the division and differentiation of germ cells. Sertoli cells respond to increased follicle-stimulating hormone (FSH) and testosterone (T) levels at the onset of puberty by producing paracrine factors which affect germ cells and trigger robust onset of spermatogenesis. Such paracrine support to germ cells is absent during infancy, despite Sertoli cells being exposed to high FSH and T within the infant testis. This situation is similar to certain cases of male idiopathic infertility where post-pubertal Sertoli cells fail to support germ cell division and differentiation in spite of endogenous or exogenous hormonal support...
October 24, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/29047327/integrative-testis-transcriptome-analysis-reveals-differentially-expressed-mirnas-and-their-mrna-targets-during-early-puberty-in-atlantic-salmon
#20
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
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