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Frontiers in Endocrinology

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https://www.readbyqxmd.com/read/28798724/vasopressin-and-oxytocin-reduce-food-sharing-behavior-in-male-but-not-female-marmosets-in-family-groups
#1
Jack H Taylor, Allison A Intorre, Jeffrey A French
Oxytocin (OT) is critical for lactation and maternal care, but OT and the related nonapeptide vasopressin are important for caregiving behaviors in fathers and alloparents as well. This experiment tested the effects of vasopressin and OT on food sharing in marmoset families. We treated caregivers (parents, siblings) with intranasal vasopressin, OT, or saline, and then paired them with the youngest marmoset in the family. Caregivers were given preferred food, and then observed for food sharing and aggressive behavior with young marmosets...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28798723/structural-perspectives-of-insulin-receptor-isoform-selective-insulin-analogs
#2
Jiří Jiráček, Lenka Žáková
A significant drawback of the exogenous administration of insulin to diabetics is the non-physiological profile of insulin action resulting in the insufficient suppression of hepatic glucose production, which is the main contributing factor to diabetic hyperglycemia under fasting conditions and the basis of the challenge to restore a more physiological glucose profile in diabetes. The insulin receptor (IR) exists in two alternatively spliced variants, IR-A and IR-B, with different tissue distribution. While peripheral tissues contain different proportions of both isoforms, hepatic cells almost exclusively contain IR-B...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28790978/progress-and-challenges-in-the-search-for-the-mechanisms-of-pulsatile-gonadotropin-releasing-hormone-secretion
#3
REVIEW
Stephanie Constantin
Fertility relies on the proper functioning of the hypothalamic-pituitary-gonadal axis. The hormonal cascade begins with hypothalamic neurons secreting gonadotropin-releasing hormone (GnRH) into the hypophyseal portal system. In turn, the GnRH-activated gonadotrophs in the anterior pituitary release gonadotropins, which then act on the gonads to regulate gametogenesis and sex steroidogenesis. Finally, sex steroids close this axis by feeding back to the hypothalamus. Despite this seeming straightforwardness, the axis is orchestrated by a complex neuronal network in the central nervous system...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28790977/micro-and-nano-vesicles-from-first-trimester-human-placentae-carry-flt-1-and-levels-are-increased-in-severe-preeclampsia
#4
Mancy Tong, Qi Chen, Joanna L James, Peter R Stone, Lawrence W Chamley
BACKGROUND/OBJECTIVES: Preeclampsia is a life-threatening hypertensive disease affecting 3-5% of pregnancies. While the pathogenesis of preeclampsia remains unclear, it is known that placenta-derived factors trigger the disease by activating maternal endothelial cells prior to the onset of clinical symptoms. Extracellular vesicles (EVs) of different sizes extruded by the placenta may be one factor. The truncated/secreted form of Flt-1 (sFlt-1) has also been implicated in the pathogenesis of preeclampsia...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28790976/factors-affecting-measurement-of-salivary-cortisol-and-secretory-immunoglobulin-a-in-field-studies-of-athletes
#5
Barry Thomas Pritchard, Warren Stanton, Roger Lord, Peter Petocz, Gert-Jan Pepping
AIMS: Biological and lifestyle factors, such as daily rhythm, caffeine ingestion, recent infection, and antibiotic intake, have been shown to influence measurements of salivary cortisol (SC) and secretory immunoglobulin A (sIgA). Current methodology in unsynchronized, field-based biomarker studies does not take these effects into account. Moreover, very little is known about the combined effects of biological and lifestyle factors on SC and sIgA. This study supports development of a protocol for measuring biomarkers from saliva collected in field studies by examining the individual and combined effects of these factors on SC and sIgA...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28790975/rodent-models-of-non-classical-progesterone-action-regulating-ovulation
#6
REVIEW
Melinda A Mittelman-Smith, Lauren M Rudolph, Margaret A Mohr, Paul E Micevych
It is becoming clear that steroid hormones act not only by binding to nuclear receptors that associate with specific response elements in the nucleus but also by binding to receptors on the cell membrane. In this newly discovered manner, steroid hormones can initiate intracellular signaling cascades which elicit rapid effects such as release of internal calcium stores and activation of kinases. We have learned much about the translocation and signaling of steroid hormone receptors from investigations into estrogen receptor α, which can be trafficked to, and signal from, the cell membrane...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28785244/am-37-and-st-36-are-small-molecule-bombesin-receptor-antagonists
#7
Terry W Moody, Nicole Tashakkori, Samuel A Mantey, Paola Moreno, Irene Ramos-Alvarez, Marcello Leopoldo, Robert T Jensen
While peptide antagonists for the gastrin-releasing peptide receptor (BB2R), neuromedin B receptor (BB1R), and bombesin (BB) receptor subtype-3 (BRS-3) exist, there is a need to develop non-peptide small molecule inhibitors for all three BBR. The BB agonist (BA)1 binds with high affinity to the BB1R, BB2R, and BRS-3. In this communication, small molecule BBR antagonists were evaluated using human lung cancer cells. AM-37 and ST-36 inhibited binding to human BB1R, BB2R, and BRS-3 with similar affinity (Ki = 1...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28785243/thyroid-autoimmunity-and-antiphospholipid-syndrome-not-such-a-trivial-association
#8
REVIEW
Mathilde Versini
Antiphospholipid syndrome (APS) is an autoimmune disease that manifests as recurrent venous or arterial thrombosis and/or pregnancy-related complications in the presence of persistent antiphospholipid (aPL) antibodies measured at least 3 months apart. APS occurs either as a primary condition or as a part of an underlying disorder, usually systemic lupus erythematosus (SLE). Otherwise, APS may be frequently associated with autoimmune disorders. Little is known about the association of APS and aPL antibodies with thyroid autoimmune diseases or thyroid autoantibodies...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28785242/activating-transcription-factor-5-knockdown-reduces-aggressiveness-of-mammary-tumor-cells-and-attenuates-mammary-tumor-growth
#9
Sarit Ben-Shmuel, Rola Rashed, Ran Rostoker, Elina Isakov, Zila Shen-Orr, Derek LeRoith
Activating transcription factor-5 (ATF5) is an anti-apoptotic factor and has been implicated in enhancing the survival of cancer cells under stress and in regulating the autophagy process. Targeting ATF5 in anticancer therapy may be particularly attractive because of its differential role in cancer cells than in non-transformed cells, thus allowing specificity of the treatment. Using the delivery of short hairpin RNA vectors into the Mvt1 and Met1 cell lines, we tested the role of ATF5 in the development of mammary tumors in vivo and in regulating proliferation and migration of these cells in vitro...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28785241/exposure-to-a-high-fat-diet-during-early-development-programs-behavior-and-impairs-the-central-serotonergic-system-in-juvenile-non-human-primates
#10
Jacqueline R Thompson, Jeanette C Valleau, Ashley N Barling, Juliana G Franco, Madison DeCapo, Jennifer L Bagley, Elinor L Sullivan
Perinatal exposure to maternal obesity and high-fat diet (HFD) consumption not only poses metabolic risks to offspring but also impacts brain development and mental health. Using a non-human primate model, we observed a persistent increase in anxiety in juvenile offspring exposed to a maternal HFD. Postweaning HFD consumption also increased anxiety and independently increased stereotypic behaviors. These behavioral changes were associated with modified cortisol stress response and impairments in the development of the central serotonin synthesis, with altered tryptophan hydroxylase-2 mRNA expression in the dorsal and median raphe...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28769874/high-glucocorticoid-response-to-24-h-shift-stressors-in-male-but-not-in-female-physicians
#11
Claudia Boettcher, Michaela F Hartmann, Klaus-Peter Zimmer, Stefan A Wudy
Physicians' daily work is accompanied by emotional and physical stress, and 24-h shifts are considered to be a major stressor. Effects of stressors on the hypothalamic-pituitary-adrenal (HPA) axis can be evaluated by estimating the glucocorticoid excretion in urine samples. We characterized the impact of a 24-h working period on the urinary glucocorticoid excretion of physicians and focused on gender differences. 10 females and 12 male physicians collected 24-h urine samples during a 24-h shift ("on-duty") and on a free weekend ("off-duty") that were analyzed by gas chromatography-mass spectrometry...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28769873/targeting-obesity-and-diabetes-to-treat-heart-failure-with-preserved-ejection-fraction
#12
REVIEW
Raffaele Altara, Mauro Giordano, Einar S Nordén, Alessandro Cataliotti, Mazen Kurdi, Saeed N Bajestani, George W Booz
Heart failure with preserved ejection fraction (HFpEF) is a major unmet medical need that is characterized by the presence of multiple cardiovascular and non-cardiovascular comorbidities. Foremost among these comorbidities are obesity and diabetes, which are not only risk factors for the development of HFpEF, but worsen symptoms and outcome. Coronary microvascular inflammation with endothelial dysfunction is a common denominator among HFpEF, obesity, and diabetes that likely explains at least in part the etiology of HFpEF and its synergistic relationship with obesity and diabetes...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28751878/autoimmune-thyroiditis-and-myasthenia-gravis
#13
REVIEW
Angela Lopomo, Sonia Berrih-Aknin
Autoimmune diseases (AIDs) are the result of specific immune responses directed against structures of the self. In normal conditions, the molecules recognized as "self" are tolerated by immune system, but when the self-tolerance is lost, the immune system could react against molecules from the body, causing the loss of self-tolerance, and subsequently the onset of AID that differs for organ target and etiology. Autoimmune thyroid disease (ATD) is caused by the development of autoimmunity against thyroid antigens and comprises Hashimoto's thyroiditis and Graves disease...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28751877/autoimmune-abnormalities-of-postpartum-thyroid-diseases
#14
REVIEW
Flavia Di Bari, Roberta Granese, Maria Le Donne, Roberto Vita, Salvatore Benvenga
The year following parturition is a critical time for the de novo appearance or exacerbation of autoimmune diseases, including autoimmune thyroid disease. The vast majority of postpartum thyroid disease consists of postpartum thyroiditis (PPT) and the minority by Graves' disease and non-autoimmune thyroiditis. PPT has a worldwide prevalence ranging from 1 to 22% and averaging 5% based on a review published in 2012. Several factors confer risk for the development of PPT. Typically, the clinical course of PPT is characterized by three phases: thyrotoxic, hypothyroid, and euthyroid phase...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28744256/corticotropin-releasing-hormone-as-the-homeostatic-rheostat-of-feto-maternal-symbiosis-and-developmental-programming-in-utero-and-neonatal-life
#15
REVIEW
Viridiana Alcántara-Alonso, Pamela Panetta, Patricia de Gortari, Dimitris K Grammatopoulos
A balanced interaction between the homeostatic mechanisms of mother and the developing organism during pregnancy and in early neonatal life is essential in order to ensure optimal fetal development, ability to respond to various external and internal challenges, protection from adverse programming, and safeguard maternal care availability after parturition. In the majority of pregnancies, this relationship is highly effective resulting in successful outcomes. However, in a number of pathological settings, perturbations of the maternal homeostasis disrupt this symbiosis and initiate adaptive responses with unpredictable outcomes for the fetus or even the neonate...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28744255/glycemic-and-metabolic-effects-of-two-long-bouts-of-moderate-intensity-exercise-in-men-with-normal-glucose-tolerance-or-type-2-diabetes
#16
Saeed Reza Eshghi, Kevin Fletcher, Étienne Myette-Côté, Cody Durrer, Raniah Q Gabr, Jonathan P Little, Peter Senior, Craig Steinback, Margie H Davenport, Gordon J Bell, Dion R Brocks, Normand G Boulé
BACKGROUND: The glycemic and insulinemic responses following 30-60 min of exercise have been extensively studied, and a dose-response has been proposed between exercise duration, or volume, and improvements in glucose tolerance or insulin sensitivity. However, few studies have examined the effects of longer bouts of exercise in type 2 diabetes (T2D). Longer bouts may have a greater potential to affect glucagon, interleukin-6 (IL-6) and incretin hormones [i.e., glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic peptide (GIP)]...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28744254/metabolic-characterization-of-a-novel-ror%C3%AE-knockout-mouse-model-without-ataxia
#17
Cyrielle Billon, Sadichha Sitaula, Thomas P Burris
The retinoic acid receptor-related receptor α (RORα) is a nuclear receptor that plays an important role in regulation of metabolism and the immune system. Genetic deletion of the receptor yields mice with significant cerebellar developmental issues associated with severe ataxia. Although many metabolic studies have been performed in these models, the impaired locomotor activity of these mice is known to affect their normal mobility and feeding behaviors. This creates some difficulty in interpretation of the role of RORα in models of metabolic disease where feeding and muscle function is a critical component of the pathophysiology...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28740484/corrigendum-contemporary-medical-management-of-primary-hyperparathyroidism-a-systematic-review
#18
Julius Simoni Leere, Jesper Karmisholt, Maciej Robaczyk, Peter Vestergaard
[This corrects the article on p. 79 in vol. 8, PMID: 28473803.].
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28740483/a-case-with-spondyloenchondrodysplasia-treated-with-growth-hormone
#19
Takanori Utsumi, Satoshi Okada, Kazushi Izawa, Yoshitaka Honda, Gen Nishimura, Ryuta Nishikomori, Rika Okano, Masao Kobayashi
Spondyloenchondrodysplasia (SPENCD) is an autosomal recessive skeletal dysplasia caused by loss of function mutations in acid phosphatase 5, tartrate resistant (ACP5). Hypomorphic ACP5 mutations impair endochondral bone growth and create an interferon (INF) signature, which lead to distinctive spondylar and metaphyseal dysplasias, and extraskeletal morbidity, such as neurological involvement and immune dysregulation, respectively. We report an affected boy with novel ACP5 mutations, a splice-site mutation (736-2 A>C) and a nonsense mutation (R176X)...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28740482/both-low-blood-glucose-and-insufficient-treatment-confer-risk-of-neurodevelopmental-impairment-in-congenital-hyperinsulinism-a-multinational-cohort-study
#20
Annett Helleskov, Maria Melikyan, Evgenia Globa, Inna Shcherderkina, Fani Poertner, Anna-Maria Larsen, Karen Filipsen, Klaus Brusgaard, Charlotte Dahl Christiansen, Lars Kjaersgaard Hansen, Henrik T Christesen
BACKGROUND/AIMS: Congenital hyperinsulinism (CHI) is a heterogeneous disease most frequently caused by KATP-channel (ABCC8 and KCNJ11) mutations, with neonatal or later onset, variable severity, and with focal or diffuse pancreatic involvement as the two major histological types. CHI confers a high risk of neurological impairment; however, sparsely studied in larger patient series. We assessed the neurodevelopmental outcome in children with CHI at follow-up in a mixed international cohort...
2017: Frontiers in Endocrinology
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