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https://www.readbyqxmd.com/read/28333300/comparison-of-global-gene-expression-profiles-of-microdissected-human-foetal-leydig-cells-with-their-normal-and-hyperplastic-adult-equivalents
#1
Grete Lottrup, Kirstine Belling, Henrik Leffers, John E Nielsen, Marlene D Dalgaard, Anders Juul, Niels E Skakkebæk, Søren Brunak, Ewa Rajpert-De Meyts
STUDY QUESTION: Do human adult Leydig cells (ALCs) within hyperplastic micronodules display characteristics of foetal LCs (FLCs)? SUMMARY ANSWER: The gene expression profiles of FLCs and all ALC subgroups were clearly different, but there were no significant differences in expressed genes between the normally clustered and hyperplastic ALCs. WHAT IS KNOWN ALREADY: LCs are the primary androgen producing cells in males throughout development and appear in chronologically distinct populations; FLCs, neonatal LCs and ALCs...
March 17, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28324034/anti-mullerian-hormone-and-ovarian-morphology-in-women-with-isolated-hypogonadotropic-hypogonadism-kallmann-syndrome-effects-of-recombinant-human-fsh
#2
Hélène Bry-Gauillard, Florence Larrat-Ledoux, Jean-Marc Levaillant, Nathalie Massin, Luigi Maione, Isabelle Beau, Nadine Binart, Philippe Chanson, Sylvie Brailly-Tabard, Janet E Hall, Jacques Young
Context: Isolated hypogonadotropic hypogonadism (IHH), characterized by gonadotropin deficiency and absent puberty, is very rare in women. IHH prevents pubertal ovarian stimulation, but anti-Mullerian hormone (AMH) and antral follicle count (AFC), have not been studied. Objectives: 1) Compare, in IHH versus controls, AMH, ovarian volume (OV) and AFC. 2) Compare in IHH, ovarian responses to recombinant human FSH (rhFSH) and rhFSH plus rhLH. Subjects: 68 IHH women, 51 matched healthy women...
January 27, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28248755/testicular-growth-and-development-in-puberty
#3
Jaakko J Koskenniemi, Helena E Virtanen, Jorma Toppari
PURPOSE OF REVIEW: To describe pubertal testicular growth in humans, changes in testicular cell populations that result in testicular growth, and the role of testosterone and gonadotrophins follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in testicular growth. When human data were not available, studies in nonhuman primates and/or rodents were used as surrogates. RECENT FINDINGS: Testicular growth in puberty follows a sigmoidal growth curve, with a large variation in timing of testicular growth and adult testicular volume...
February 28, 2017: Current Opinion in Endocrinology, Diabetes, and Obesity
https://www.readbyqxmd.com/read/28238455/androgen-dependent-mechanisms-of-pro-angiogenic-networks-in-placental-and-tumor-development
#4
Veronika M Metzler, Simone de Brot, Robert S Robinson, Jennie N Jeyapalan, Emad Rakha, Thomas Walton, David S Gardner, Emma F Lund, Jonathan Whitchurch, Daisy Haigh, Jack M Lochray, Brian D Robinson, Cinzia Allegrucci, Rupert G Fray, Jenny L Persson, Niels Ødum, Regina R Miftakhova, Albert A Rizvanov, Ieuan A Hughes, Rieko Tadokoro-Cuccaro, David M Heery, Catrin S Rutland, Nigel P Mongan
The placenta and tumors share important characteristics, including a requirement to establish effective angiogenesis. In the case of the placenta, optimal angiogenesis is required to sustain the blood flow required to maintain a successful pregnancy, whereas in tumors establishing new blood supplies is considered a key step in supporting metastases. Therefore the development of novel angiogenesis inhibitors has been an area of active research in oncology. A subset of the molecular processes regulating angiogenesis are well understood in the context of both early placentation and tumorigenesis...
February 20, 2017: Placenta
https://www.readbyqxmd.com/read/28211649/insufficient-sleep-in-adolescents-causes-and-consequences
#5
Judith A Owens, Miriam R Weiss
Insufficient sleep poses an important and complicated set of health risks in the adolescent population. Not only is deficient sleep (defined as both sleep duration inadequate to meet sleep needs and sleep timing misaligned with the body's circadian rhythms) at epidemic levels in this population, but the contributing factors are both complex and numerous and there are a myriad of negative physical and mental health, safety and performance consequences. Causes of inadequate sleep identified in this population include internal biological processes such as the normal shift (delay) in circadian rhythm that occurs in association with puberty and a developmentally-based slowing of the "sleep drive", and external factors including extracurricular activities, excessive homework load, evening use of electronic media, caffeine intake and early school start times...
February 17, 2017: Minerva Pediatrica
https://www.readbyqxmd.com/read/28164075/the-impact-of-obesity-on-hyperandrogenemia-in-korean-girls
#6
Min Jae Kang, Seung Yang, Il Tae Hwang
PURPOSE: As metabolic complication and polycystic ovarian syndrome due to childhood obesity is rising, the role of hyperandrogenemia (HA) and hyperinsulinism is receiving attention. The aims of this study were to investigate the presence of obvious HA according to pubertal status and to find potential etiologic determinants of HA in Korean obese (OB) girls. METHODS: We analyzed 91 girls aged 6-17 years (prepuberty, n=54; puberty, n=37). Each girl was classified as being either normal weight (NW) or OB...
December 2016: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28007961/c-jun-dimerization-protein-2-jdp2-is-a-transcriptional-repressor-of-follicle-stimulating-hormone-%C3%AE-fsh%C3%AE-and-is-required-for-preventing-premature-reproductive-senescence-in-female-mice
#7
Carrie R Jonak, Nancy M Lainez, Lacey L Roybal, Alexa D Williamson, Djurdjica Coss
Follicle-stimulating hormone (FSH) regulates follicular growth and stimulates estrogen synthesis in the ovaries. FSH is a heterodimer consisting of an α subunit, also present in luteinizing hormone, and a unique β subunit, which is transcriptionally regulated by gonadotropin-releasing hormone 1 (GNRH). Because most FSH is constitutively secreted, tight transcriptional regulation is critical for maintaining FSH levels within a narrow physiological range. Previously, we reported that GNRH induces FSHβ (Fshb) transcription via induction of the AP-1 transcription factor, a heterodimer of c-FOS and c-JUN...
February 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27995059/working-memory-circuit-as-a-function-of-increasing-age-in-healthy-adolescence-a-systematic-review-and-meta-analyses
#8
Julia Andre, Marco Picchioni, Ruibin Zhang, Timothea Toulopoulou
Working memory ability matures through puberty and early adulthood. Deficits in working memory are linked to the risk of onset of neurodevelopmental disorders such as schizophrenia, and there is a significant temporal overlap between the peak of first episode psychosis risk and working memory maturation. In order to characterize the normal working memory functional maturation process through this critical phase of cognitive development we conducted a systematic review and coordinate based meta-analyses of all the available primary functional magnetic resonance imaging studies (n = 382) that mapped WM function in healthy adolescents (10-17 years) and young adults (18-30 years)...
2016: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27987429/a-reduction-in-long-term-spatial-memory-persists-after-discontinuation-of-peripubertal-gnrh-agonist-treatment-in-sheep
#9
D Hough, M Bellingham, I R Haraldsen, M McLaughlin, J E Robinson, A K Solbakk, N P Evans
Chronic gonadotropin-releasing hormone agonist (GnRHa) administration is used where suppression of hypothalamic-pituitary-gonadal axis activity is beneficial, such as steroid-dependent cancers, early onset gender dysphoria, central precocious puberty and as a reversible contraceptive in veterinary medicine. GnRH receptors, however, are expressed outside the reproductive axis, e.g. brain areas such as the hippocampus which is crucial for learning and memory processes. Previous work, using an ovine model, has demonstrated that long-term spatial memory is reduced in adult rams (45 weeks of age), following peripubertal blockade of GnRH signaling (GnRHa: goserelin acetate), and this was independent of the associated loss of gonadal steroid signaling...
March 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27941181/hypogonadotropic-hypogonadism-in-a-female-patient-with-congenital-arhinia
#10
Janel Darcy Hunter, Melissa Ann Davis, Jennifer Rachel Law
The association of anosmia and congenital hypogonadotropic hypogonadism (CHH) is well described; however, congenital arhinia is a malformation associated with CHH that occurs much more rarely. There have been three reports of male patients with hypogonadism and congenital arhinia in the literature to date. We present the first case of arhinia associated with CHH in a female patient. A 14 years and 8 months female with congenital arhinia presented with delayed puberty. Physical examination and laboratory evaluation were consistent with hypogonadotropic hypogonadism...
January 1, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/27829479/metabolic-and-reproductive-characteristics-of-replacement-beef-heifers-subjected-to-an-early-weaning-regimen-involving-high-concentrate-feeding
#11
A L Zezeski, V L McCracken, R K Poole, A Al Naib, J K Smith, M A McCann, M L Rhoads
In an effort to better understand the consequences of early weaning (EW) for replacement beef heifers, a two-phase experiment was conducted investigating the impact on metabolic function and documenting reproductive characteristics. In phase 1, Angus×Simmental heifers (n=35) were stratified by BW and sire, and randomly assigned to either a normal weaning (NW, n=18) or EW (n=17) treatment. EW heifers were weaned at 107±3 days of age and provided access to a concentrate-based ration ad libitum with limit-fed mixed grass hay...
November 10, 2016: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/27825136/pubertal-and-adult-windows-of-susceptibility-to-a-high-animal-fat-diet-in-trp53-null-mammary-tumorigenesis
#12
Yirong Zhu, Mark D Aupperlee, Yong Zhao, Ying Siow Tan, Erin L Kirk, Xuezheng Sun, Melissa A Troester, Richard C Schwartz, Sandra Z Haslam
Premenopausal breast cancer is associated with increased animal fat consumption among normal weight, but not overweight women (Farvid et al., 2014). Our previous findings in obesity-resistant BALB/c mice similarly showed promotion of carcinogen-induced mammary tumorigenesis by a diet high in saturated animal fat (HFD). This effect was specific to pubertal versus adult HFD. This study identifies the effects of HFD during puberty versus adulthood in Trp53-null transplant BALB/c mice and investigates its mechanism of enhancing tumorigenesis...
November 4, 2016: Oncotarget
https://www.readbyqxmd.com/read/27787478/dysfunctional-uterine-bleeding-as-an-early-sign-of-polycystic-ovary-syndrome-during-adolescence-an-update
#13
Efthimios Deligeoroglou, Vasileios Karountzos
AIM: Abnormal Uterine Bleeding (AUB) is a frequent reason for concern between adolescents. The most common cause of AUB in these girls, when other pathologies have been excluded, is Dysfunctional Uterine Bleeding (DUB). The aim of this review is to assess the role of DUB as an early symptom of Polycystic Ovarian Syndrome (PCOS) diagnosis later in life. METHODS: Review of the literature, using Pubmed and Medline as primary databases, regarding the correlation between DUB cases early after menarche and PCOS diagnosis in the future...
October 27, 2016: Minerva Ginecologica
https://www.readbyqxmd.com/read/27773998/multiple-effects-of-growth-hormone-in-the-body-is-it-really-the-hormone-for-growth
#14
REVIEW
Jesús Devesa, Cristina Almengló, Pablo Devesa
In this review, we analyze the effects of growth hormone on a number of tissues and organs and its putative role in the longitudinal growth of an organism. We conclude that the hormone plays a very important role in maintaining the homogeneity of tissues and organs during the normal development of the human body or after an injury. Its effects on growth do not seem to take place during the fetal period or during the early infancy and are mediated by insulin-like growth factor I (IGF-I) during childhood and puberty...
2016: Clinical Medicine Insights. Endocrinology and Diabetes
https://www.readbyqxmd.com/read/27747183/pectus-excavatum-from-a-pediatric-surgeon-s-perspective
#15
Donald Nuss, Robert J Obermeyer, Robert E Kelly
Historically, pectus excavatum (PE) was reported to be congenital, but in our experience only 22% are noticed in the first decade of life. Thus far, genetic studies support an autosomal recessive heritability, which coincides with only 40% of our patients having some positive family history, but is also contradictory given a constant sex ratio of 4:1 in favor of males. This inconsistency may be explained by the effect of more than one pectus disease-associated allele. Once the deformity is noticed, it tends to progress slowly until puberty, when rapid progression is often seen...
September 2016: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/27676716/dystonia-of-the-lower-limb-after-sacral-neuromodulation-implanted-to-a-16-year-old-boy-with-non-obstructive-chronic-urinary-retention
#16
Teng Maëlys, Gilberte Robain, Samy Bendaya
OBJECTIVE: Sacral neuromodulation is usually used to treat non-obstructive urinary retention when other forms of treatment have failed. An improvement greater than 50% in urinary symptoms after 40months of follow-up has been shown: - moreover, it also has few complications: infections, technical failures, discomfort; - we report a case of dystonia of the lower limb, appeared after sacral neuromodulation implantation. OBSERVATIONS: MMP is a 16-year-old boy with early puberty as noteworthy medical history...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27611179/testicular-function-during-puberty-and-young-adulthood-in-patients-with-klinefelter-s-syndrome-with-and-without-spermatozoa-in-seminal-fluid
#17
J Rohayem, E Nieschlag, M Zitzmann, S Kliesch
Patients with Klinefelter's syndrome experience progressive testicular degeneration resulting in impaired endocrine function and azoospermia. What proportion of adolescents develop testosterone deficiency during puberty and how many have spermatozoa in their semen is unclear to date. We aimed to investigate testicular function during puberty and young adulthood in patients with Klinefelter's syndrome and to assess testosterone effects in target tissues. The clinical data of 281 patients with non-mosaic Klinefelter's syndrome aged 10-25 years without previous testosterone replacement were reviewed...
September 9, 2016: Andrology
https://www.readbyqxmd.com/read/27605428/unusual-x-chromosome-inactivation-pattern-in-patients-with-xp11-23-p11-22-duplication-report-and-review
#18
Adriana Di-Battista, Vera Ayres Meloni, Magnus Dias da Silva, Mariana Moysés-Oliveira, Maria Isabel Melaragno
In females carrying structural rearrangements of an X-chromosome, cells with the best dosage balance are preferentially selected, frequently resulting in a skewed inactivation pattern and amelioration of the phenotype. The Xp11.23-p11.22 region is involved in a recently described microduplication syndrome associated with severe clinical consequences in males and females, causing intellectual disability, behavior problems, epilepsy with electroencephalogram anomalies, minor facial anomalies, and early onset of puberty...
September 8, 2016: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/27585961/diagnosis-and-management-of-silver-russell-syndrome-first-international-consensus-statement
#19
Emma L Wakeling, Frédéric Brioude, Oluwakemi Lokulo-Sodipe, Susan M O'Connell, Jennifer Salem, Jet Bliek, Ana P M Canton, Krystyna H Chrzanowska, Justin H Davies, Renuka P Dias, Béatrice Dubern, Miriam Elbracht, Eloise Giabicani, Adda Grimberg, Karen Grønskov, Anita C S Hokken-Koelega, Alexander A Jorge, Masayo Kagami, Agnes Linglart, Mohamad Maghnie, Klaus Mohnike, David Monk, Gudrun E Moore, Philip G Murray, Tsutomu Ogata, Isabelle Oliver Petit, Silvia Russo, Edith Said, Meropi Toumba, Zeynep Tümer, Gerhard Binder, Thomas Eggermann, Madeleine D Harbison, I Karen Temple, Deborah J G Mackay, Irène Netchine
This Consensus Statement summarizes recommendations for clinical diagnosis, investigation and management of patients with Silver-Russell syndrome (SRS), an imprinting disorder that causes prenatal and postnatal growth retardation. Considerable overlap exists between the care of individuals born small for gestational age and those with SRS. However, many specific management issues exist and evidence from controlled trials remains limited. SRS is primarily a clinical diagnosis; however, molecular testing enables confirmation of the clinical diagnosis and defines the subtype...
February 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/27564696/pattern-of-menarche-age-normal-early-and-late-and-its-relationship-with-some-demographic-characteristics-in-girls-and-their-parents
#20
Naeimeh Tayebi, Zahra Yazdznpanahi, Shahrzad Yektatalab, Marzieh Akbarzadeh, Najaf Zare
BACKGROUND: Menarche age is an indicator of a girl's puberty besides the clinical assessment of detecting deviations. This study aimed to search the pattern of menarche age (normal, early and late) and its relationship with some demographic characteristics in girls and their parents. METHODS: This cross-sectional study was done on girls aged between 9 and 18 years old in Shiraz city. About 2000 students were selected through cluster sampling. Data collection was done by applying a demographic information form...
August 26, 2016: International Journal of Adolescent Medicine and Health
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