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https://www.readbyqxmd.com/read/27912163/reproduction-impairment-and-endocrine-disruption-in-adult-zebrafish-danio-rerio-after-waterborne-exposure-to-tboep
#1
Qinglong Xu, Ding Wu, Yao Dang, Liqin Yu, Chunsheng Liu, Jianghua Wang
Tris (2-butoxyethyl) phosphate (TBOEP) is widely used as a substitute of polybrominated diphenyl ethers (PBDEs). It has been frequently measured at concentrations of micrograms per liter (μg/L) in surface waters and waste water. However, limited information is available about the reproduction toxicology of TBOEP. In this study, adult zebrafish pairs were exposed to TBOEP at concentrations of 0, 5, 50, and 500μg/L for 21days. The effects on reproduction, hormone concentration, transcription of genes along the hypothalamic-pituitary-gonadal (HPG) axis, and gonadal development were investigated...
November 24, 2016: Aquatic Toxicology
https://www.readbyqxmd.com/read/27908416/suppression-of-the-brain-pituitary-testicular-axis-function-following-acute-arsenic-and-manganese-co-exposure-and-withdrawal-in-rats
#2
Isaac A Adedara, Amos O Abolaji, Ifeoluwa O Awogbindin, Ebenezer O Farombi
Despite the fact that most environmental exposures to metals do not occur in isolation, the combined effects of metal mixtures on brain-pituitary-gonadal axis are poorly known. The present study investigated the impacts of co-exposure to arsenic (As) and manganese (Mn) on sperm characteristics, reproductive hormones and selected oxidative stress indices in the brain, testes and epididymis of rats following exposure for 15 consecutive days to 60mg/L of AsO2Na and 30mg/L of MnCl2 in drinking water. The results showed that while the brain weight remained unaffected, the fluid intake and the weights of testes and epididymis significantly (p<0...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27901064/obesity-and-gender-dependent-role-of-endogenous-somatostatin-and-cortistatin-in-the-regulation-of-endocrine-and-metabolic-homeostasis-in-mice
#3
Raúl M Luque, José Cordoba-Chacon, Ana I Pozo-Salas, Begoña Porteiro, Luis de Lecea, Rubén Nogueiras, Manuel D Gahete, Justo P Castaño
Somatostatin (SST) and cortistatin (CORT) regulate numerous endocrine secretions and their absence [knockout (KO)-models] causes important endocrine-metabolic alterations, including pituitary dysregulations. We have demonstrated that the metabolic phenotype of single or combined SST/CORT KO-models is not drastically altered under normal conditions. However, the biological actions of SST/CORT are conditioned by the metabolic-status (e.g. obesity). Therefore, we used male/female SST- and CORT-KO mice fed low-fat (LF) or high-fat (HF) diet to explore the interplay between SST/CORT and obesity in the control of relevant pituitary-axes and whole-body metabolism...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27900232/vanishing-pituitary-macroadenoma-a-case-report
#4
Emily P Sieg, Hayk Stepanyan, Russell Payne, Tao Ouyang, Brad E Zacharia
Pituitary macroadenomas are the most common suprasellar lesions in adults and are typically managed surgically through transsphenoidal resection when symptomatic. Due to their close proximity to the optic chiasm, pituitary macroadenomas often present with signs of bitemporal hemianopsia. Alternatively, these tumors can cause mass effect, thus presenting with signs of elevated intracranial pressure or can present with signs and symptoms of endocrine dysfunction. Here, we discuss a 55-year-old male diagnosed with a non-functioning pituitary macroadenoma (NFPA) based on cranial imaging, ophthalmologic exam, and endocrine evaluation...
October 20, 2016: Curēus
https://www.readbyqxmd.com/read/27899081/endoscopic-endonasal-pituitary-adenomas-surgery-the-surgical-experience-of-178-consecutive-patients-and-learning-curve-of-two-neurosurgeons
#5
Xuefei Shou, Ming Shen, Qilin Zhang, Yichao Zhang, Wenqiang He, Zengyi Ma, Yao Zhao, Shiqi Li, Yongfei Wang
BACKGROUND: We aim to study surgical technique and analyze the related factors affecting tumor total removal and postoperative endocrinological remission for endoscopic endonasal pituitary adenomas surgery. METHODS: We retrospectively analyzed 178 endoscopic endonasal pituitary adenomas surgery from March 2011 to May 2014. Endonasal approach included the routine transnasal-sphenoidal approach, transnasal- maxillary sinus approach in four cases and transnasal-clivus approach in one case...
November 30, 2016: BMC Neurology
https://www.readbyqxmd.com/read/27896569/anti-pituitary-antibodies-against-corticotrophs-in-igg4-related-hypophysitis
#6
Naoko Iwata, Shintaro Iwama, Yoshihisa Sugimura, Yoshinori Yasuda, Kohtaro Nakashima, Seiji Takeuchi, Daisuke Hagiwara, Yoshihiro Ito, Hidetaka Suga, Motomitsu Goto, Ryoichi Banno, Patrizio Caturegli, Teruhiko Koike, Yoshiharu Oshida, Hiroshi Arima
PURPOSE: IgG4-related disease is a systemic inflammatory disease characterized by infiltration of IgG4-positive plasma cells into multiple organs, including the pituitary gland. Autoimmunity is thought to be involved in the pathogenesis of IgG4-related disease. The diagnosis of IgG4-related hypophysitis (IgG4-RH) is difficult because its clinical features, such as pituitary swelling and hypopituitarism, are similar to those of other pituitary diseases, including lymphocytic hypophysitis and sellar/suprasellar tumors...
November 28, 2016: Pituitary
https://www.readbyqxmd.com/read/27887910/assessment-of-serum-level-of-corticotropin-releasing-factor-in-primary-nocturnal-enuresis
#7
Ayat A Motawie, Amany M Abd Al-Aziz, Hanan M Hamed, Amany A A Fatouh, Mona A M Awad, Amany Abd El-Ghany
INTRODUCTION: Primary nocturnal enuresis is one of the sleep related phenomena characterized by disruption in the relationship between arousal and urination. Corticotropin-releasing factor (CRF) is a neurohormone released from the paraventricular nucleus of the hypothalamus into the median eminence to elicit release of adrenocorticotrophin from the anterior pituitary. It may act to modulate autonomic function and behavior in concert with the endocrine effects. Conflicting animal studies about the role of CRF in micturition, either facilitating or inhibiting, have been raised...
October 24, 2016: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/27876089/rapid-onset-obesity-hypoventilation-hypothalamic-dysfunction-autonomic-dysregulation-and-neuroendocrine-tumor-syndrome-with-a-homogenous-enlargement-of-the-pituitary-gland-a-case-report
#8
Lama Aljabban, Lina Kassab, Nour Alhuda Bakoura, Mohammad Fayez Alsalka, Ismaeil Maksoud
BACKGROUND: Rapid-onset obesity with hypoventilation, hypothalamic dysfunction, and autonomic dysregulation syndrome is a rare pediatric disorder with a variable sequence of clinical presentations, undefined etiology, and high risk of mortality. Our patient presented an unusual course of the disease accompanied by a homogenous mild enlargement of her pituitary gland with an intact pituitary-endocrine axis which, to the best of our knowledge, represents a new finding in rapid-onset obesity with hypoventilation, hypothalamic dysfunction, and autonomic dysregulation syndrome...
November 22, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27872046/pituitary-dysfunction-after-traumatic-brain-injury-are-there-definitive-data-in-children
#9
REVIEW
Paula Casano-Sancho
In the past decade, several studies in adults and children have described the risk of pituitary dysfunction after traumatic brain injury (TBI). As a result, an international consensus statement recommended follow-up on the survivors. This paper reviews published studies regarding hypopituitarism after TBI in children and compares their results. The prevalence of hypopituitarism ranges from 5% to 57%. Growth hormone (GH) and ACTH deficiency are the most common, followed by gonadotropins and thyroid-stimulating hormone...
November 21, 2016: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/27871026/copeptin-a-potential-endocrine-surrogate-marker-of-cck-4-induced-panic-symptoms
#10
Cüneyt Demiralay, Agorastos Agorastos, Alexander Yassouridis, Holger Jahn, Klaus Wiedemann, Michael Kellner
Intravenous cholecystokinin-tetrapeptide (CCK-4) administration reliably and dose-dependently provokes panic anxiety in man, accompanied by adrenocorticotropic hormone (ACTH) and cortisol release. Preclinical findings suggest that behavioral and endocrine effects of CCK-4 are mediated via corticotropin-releasing hormone (CRH) release. Anxiogenic stimulation of the central CCK-receptors in man was shown to increase as well vasopressin (AVP), which acts synergistically with CRH as pituitary-adrenocortical axis stimulator during stress...
November 8, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27870910/in-obesity-hpa-axis-activity-does-not-increase-with-bmi-but-declines-with-aging-a-meta-analysis-of-clinical-studies
#11
Judit Tenk, Péter Mátrai, Péter Hegyi, Ildikó Rostás, András Garami, Imre Szabó, Margit Solymár, Erika Pétervári, József Czimmer, Katalin Márta, Alexandra Mikó, Nóra Füredi, Andrea Párniczky, Csaba Zsiborás, Márta Balaskó
BACKGROUND: Obesity is one of the major public health challenges worldwide. It involves numerous endocrine disorders as etiological factors or as complications. Previous studies strongly suggested the involvement of the hypothalamic-pituitary-adrenal (HPA) axis activity in obesity, however, to date, no consistent trend in obesity-associated alterations of the HPA axis has been identified. Aging has been demonstrated to aggravate obesity and to induce abnormalities of the HPA axis. Thus, the question arises whether obesity is correlated with peripheral indicators of HPA function in adult populations...
2016: PloS One
https://www.readbyqxmd.com/read/27870443/sex-differences-in-depression-during-pregnancy-and-the-postpartum-period
#12
REVIEW
Inger Sundström Poromaa, Erika Comasco, Marios K Georgakis, Alkistis Skalkidou
Women have a lifetime risk of major depression double that of men but only during their reproductive years. This sex difference has been attributed partially to activational effects of female sex steroids and also to the burdens of pregnancy, childbirth, and parenting. Men, in contrast, have a reproductive period difficult to delineate, and research on the mental health of men has rarely considered the effects of fatherhood. However, the couple goes through a number of potentially stressing events during the reproductive period, and both mothers and fathers are at risk of developing peripartum depression...
January 2, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/27862210/the-mechanostat-principle-and-the-osteoprotegerin-opg-rankl-rank-system-part-ii-the-role-of-the-hypothalamic-pituitary-axis
#13
Joanna B Tyrovola
Recent literature provides us with the indication that the ratio of OPG/RANKL concentrations fluctuate in a non-linear (bell-shaped) mode, according to Frost's 'mechanostat' theory, during the application of mechanical strain. A similar cellular signal transduction mechanism to mechanical loading, that may also regulate bone resorptive activities, has nowdays been proposed. Since the skeleton is considered to be an endocrine organ, as such, it may likewise be subject to hypothalamic control. This central regulatory system may continually modulate the adaptation of the bone homeostatic system to external challenges...
November 15, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27857870/persistent-trigeminal-artery-in-endonasal-resection-of-skull-base-tumors-a-systematic-review
#14
Jasper Shen, James Tourje, Elena E Chang, Adam N Mamelak, Arthur W Wu
Background Primitive persistent trigeminal artery (PTA) is an uncommon embryologic vascular communication between the carotid and basilar arteries, which can be intimately involved by skull base tumors (SBT). Owing to its rarity, skull base surgeons should familiarize themselves with the anatomical variations of PTA to avoid catastrophic complications. Objective To appraise and summarize the available evidence of PTA involved by SBTs while advocating a standardized algorithm for the surgical planning of these patients...
December 2016: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/27857837/autoimmune-polyendocrinopathy-and-hypophysitis-after-puumala-hantavirus-infection
#15
Marlene Tarvainen, Satu Mäkelä, Jukka Mustonen, Pia Jaatinen
: Puumala hantavirus (PUUV) infection causes nephropathia epidemica (NE), a relatively mild form of haemorrhagic fever with renal syndrome (HFRS). Hypophyseal haemorrhage and hypopituitarism have been described in case reports on patients with acute NE. Chronic hypopituitarism diagnosed months or years after the acute illness has also been reported, without any signs of a haemorrhagic aetiology. The mechanisms leading to the late-onset hormonal defects remain unknown. Here, we present a case of NE-associated autoimmune polyendocrinopathy and hypopituitarism presumably due to autoimmune hypophysitis...
2016: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/27856505/transcriptomic-changes-throughout-post-hatch-development-in-gallus-gallus-pituitary
#16
Elizabeth M Pritchett, Susan J Lamont, Carl J Schmidt
The pituitary gland is a neuroendocrine organ that works closely with the hypothalamus to affect multiple processes within the body including the stress response, metabolism, growth, and immune function. Relative tissue expression (rEx) is a transcriptome analysis method that compares the genes expressed in a particular tissue to the genes expressed in all other tissues with available data. Using rEx, the aim of this study was to identify genes that are uniquely or more abundantly expressed in the pituitary when compared to all other collected chicken tissues...
November 17, 2016: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/27856292/the-challenge-hypothesis-where-it-began-and-relevance-to-humans
#17
REVIEW
John C Wingfield
A contribution to a special issue on Hormones and Human Competition. Over 40years ago assay methods that allowed the accurate measurement of circulating levels of hormones were developed for the first time enabling us to sample free-living as well as captive animals. This led to a new concept called "field endocrinology". It quickly became apparent that endocrine profiles of animals under natural conditions were very different from congeners in captivity. Furthermore, hormone data could be organized by functional units (e...
November 14, 2016: Hormones and Behavior
https://www.readbyqxmd.com/read/27853917/benzene-and-2-ethyl-phthalate-induce-proliferation-in-normal-rat-pituitary-cells
#18
Laura Tapella, Antonella Sesta, Maria Francesca Cassarino, Valentina Zunino, Maria Graziella Catalano, Francesca Pecori Giraldi
PURPOSE: Endocrine disruptors are known to modulate a variety of endocrine functions and increase the risk for neoplasia. Epidemiological data reported increased prevalence of pituitary tumors in high industrial areas while genotyping studies showed that mutations in the aryl hydrocarbon receptor (AhR) interacting protein (AIP)-chaperone to the dioxin ligand AhR-gene are linked to predisposition to pituitary tumor development. Aim of the present study was to establish whether endocrine pollutants can induce cell proliferation in normal rat pituitary cells...
November 16, 2016: Pituitary
https://www.readbyqxmd.com/read/27849376/clomiphene-citrate-in-the-treatment-of-idiopathic-or-functional-hypogonadotropic-hypogonadism-in-men-a-case-series-and-review-of-the-literature
#19
Yair Liel
OBJECTIVE: Late onset hypogonadotropic hypogonadism (LOH) is a complex, heterogeneous entity. Whenever treatment is indicated, the endocrine literature has recommend testosterone replacement. We present our experience with clomiphene citrate (CC) treatment in patients with LOH and a review of the literature. DESIGN: A retrospective case series. PATIENTS AND MEASUREMENTS: Eighteen male patients with hypogonadotropic hypogonadism, roughly according to the EMAS criteria for LOH, attended at an academic hospital outpatient clinic...
November 16, 2016: Endocrine Practice
https://www.readbyqxmd.com/read/27843654/anterior-pituitary-aplasia-in-an-infant-with-ring-chromosome-18p-deletion
#20
Edward J Bellfield, Jacqueline Chan, Sarah Durrin, Valerie Lindgren, Zohra Shad, Claudia Boucher-Berry
We present the first reported case of an infant with 18p deletion syndrome with anterior pituitary aplasia secondary to a ring chromosome. Endocrine workup soon after birth was reassuring; however, repeat testing months later confirmed central hypopituitarism. While MRI reading initially indicated no midline defects, subsequent review of the images confirmed anterior pituitary aplasia with ectopic posterior pituitary. This case demonstrates how deletion of genetic material, even if resulting in a chromosomal ring, still results in a severe syndromic phenotype...
2016: Case Reports in Endocrinology
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