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Prolactin receptor

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https://www.readbyqxmd.com/read/29114036/zinc-transporter-2-interacts-with-vacuolar-atpase-and-is-required-for-polarization-vesicle-acidification-and-secretion-in-mammary-epithelial-cells
#1
Sooyeon Lee, Olivia C Rivera, Shannon L Kelleher
An important feature of the mammary gland is its ability to undergo profound morphological, physiological, and intracellular changes to establish and maintain secretory function. During this process, key polarity proteins and receptors are recruited to the surface of mammary epithelial cells (MECs), and the vesicle transport system develops and matures. However, the intracellular mechanisms responsible for the development of secretory function in these cells are unclear. The vesicular zinc (Zn) transporter ZnT2 is critical for appropriate mammary gland architecture, and ZnT2 deletion is associated with cytoplasmic Zn accumulation, loss of secretory function and lactation failure...
November 7, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29108308/a-phase-2-study-of-the-first-imipridone-onc201-a-selective-drd2-antagonist-for-oncology-administered-every-three-weeks-in-recurrent-glioblastoma
#2
Isabel Arrillaga-Romany, Andrew S Chi, Joshua E Allen, Wolfgang Oster, Patrick Y Wen, Tracy T Batchelor
ONC201 is an oral, small molecule selective antagonist of the G protein-coupled receptor DRD2 that causes p53-independent apoptosis in tumor cells via integrated stress response activation and Akt/ERK inactivation. We performed a Phase II study that enrolled 17 patients with recurrent, bevacizumab-naïve, IDH1/2 WT glioblastoma who received 625mg ONC201 every three weeks. Median OS was 41.6 weeks with OS6 of 71% and OS9 of 53%. Seven of 17 patients are alive. PFS6 was 11.8% with two patients remaining on study who continue to receive ONC201 for >12 months...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29053801/parathyroid-hormone-related-protein-induced-hypercalcemia-of-pregnancy-successfully-reversed-by-a-dopamine-agonist
#3
Elizabeth M Winter, Natasha M Appelman-Dijkstra
Context: Parathyroid hormone related protein (PTH-rP) induced hypercalcemia or pseudophyperparathyroidism during pregnancy is a condition that can result in serious foetal and maternal complications. Among others, breast tissue might be the cause of this PTH-rP production, in which case medical treatment is possible, as we describe in this case. Setting: A 32-year old woman presented in the15th week of pregnancy with massive enlargement of breasts and abdominal pain due to severe hypercalcemia, hypercalciuria and suppressed PTH...
October 18, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29033330/exocrine-gland-secreting-peptide-1-is-a-key-chemosensory-signal-responsible-for-the-bruce-effect-in-mice
#4
Tatsuya Hattori, Takuya Osakada, Takuto Masaoka, Rumi Ooyama, Nao Horio, Kazutaka Mogi, Miho Nagasawa, Sachiko Haga-Yamanaka, Kazushige Touhara, Takefumi Kikusui
The Bruce effect refers to pregnancy termination in recently pregnant female rodents upon exposure to unfamiliar males [1]. This event occurs in specific combinations of laboratory mouse strains via the vomeronasal system [2, 3]; however, the responsible chemosensory signals have not been fully identified. Here we demonstrate that the male pheromone exocrine gland-secreting peptide 1 (ESP1) is one of the key factors that causes pregnancy block. Female mice exhibited high pregnancy failure rates upon encountering males that secreted different levels of ESP1 compared to the mated male...
October 23, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29026201/dual-contribution-of-trpv4-antagonism-in-the-regulatory-effect-of-vasoinhibins-on-blood-retinal-barrier-permeability-diabetic-milieu-makes-a-difference
#5
David Arredondo Zamarripa, Ramsés Noguez Imm, Ana María Bautista Cortés, Osvaldo Vázquez Ruíz, Michela Bernardini, Alessandra Fiorio Pla, Dimitra Gkika, Natalia Prevarskaya, Fernando López-Casillas, Wolfgang Liedtke, Carmen Clapp, Stéphanie Thébault
Breakdown of the blood-retinal barrier (BRB), as occurs in diabetic retinopathy and other chronic retinal diseases, results in vasogenic edema and neural tissue damage, causing vision loss. Vasoinhibins are N-terminal fragments of prolactin that prevent BRB breakdown during diabetes. They modulate the expression of some transient receptor potential (TRP) family members, yet their role in regulating the TRP vanilloid subtype 4 (TRPV4) remains unknown. TRPV4 is a calcium-permeable channel involved in barrier permeability, which blockade has been shown to prevent and resolve pulmonary edema...
October 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29017334/brexpiprazole-a-new-leaf-on-the-partial-dopamine-agonist-branch
#6
Judy Hope, David Castle, Nicholas A Keks
OBJECTIVES: Brexpiprazole is a new dopamine partial agonist antipsychotic in the same class as aripiprazole. This paper will briefly review brexpiprazole and compare it with aripiprazole. CONCLUSIONS: Brexpiprazole and aripiprazole are both partial agonists at dopamine D2, and serotonin 5-HT1A and antagonists at serotonin 5-HT2A and noradrenergic α1B receptors. However, the two drugs are significantly different in potencies at various receptors; neurochemical profiles predict that brexpiprazole may be comparable with aripiprazole in its antipsychotic efficacy but may cause less akathisia, extrapyramidal side effects (EPS) and activation...
October 1, 2017: Australasian Psychiatry: Bulletin of Royal Australian and New Zealand College of Psychiatrists
https://www.readbyqxmd.com/read/28980840/prolactin-receptor-gene-polymorphism-and-the-risk-of-recurrent-pregnancy-loss-a-case-control-study
#7
Jin Ju Kim, Young Min Choi, Sung Ki Lee, Kwang Moon Yang, Eun Chan Paik, Hyeon Jeong Jeong, Jong Kwan Jun, Ae Ra Han, Kyu Ri Hwang, Min A Hong
Since the first study was published reporting the candidate association between the prolactin receptor gene intron C/T polymorphism (rs37389) and recurrent miscarriage, no replication study has been performed. In this study, we investigated the role of the prolactin receptor gene C/T polymorphism in 311 Korean women with recurrent pregnancy loss and 314 controls. Genotyping for prolactin receptor gene intron C/T polymorphism was performed using a TaqMan assay. The significance of difference in the genotype distribution was assessed using a chi-square test, and continuous variables were compared using a Student's t-test...
October 5, 2017: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28977606/subdomain-2-not-the-transmembrane-domain-determines-the-dimerization-partner-of-growth-hormone-receptor-and-prolactin-receptor
#8
Ying Liu, Jing Jiang, Bradford Lepik, Yue Zhang, Kurt R Zinn, Stuart J Frank
Growth hormone receptor (GHR) and prolactin (PRL) receptor (PRLR) are homologous transmembrane class I cytokine receptors. In humans, GH interacts with GHR homodimers or PRLR homodimers and PRL interacts with only PRLR homodimers to promote signaling. In human breast cancer cells endogenously expressing both receptors, GHR and PRLR specifically coimmunoprecipitate. We previously devised a split luciferase complementation assay to study GHR and PRLR assemblages. In this technique, firefly luciferase is split into two fragments (N- and C-terminal fragments of the luciferase), each without enzyme activity and tethered to the tails of two receptors...
October 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28977596/bisphenol-s-alters-the-lactating-mammary-gland-and-nursing-behaviors-in-mice-exposed-during-pregnancy-and-lactation
#9
Charlotte D LaPlante, Mary C Catanese, Ruby Bansal, Laura N Vandenberg
High doses of estrogenic pharmaceuticals were once prescribed to women to halt lactation. Yet, the effects of low-level xenoestrogens on lactation remain poorly studied. We investigated the effects of bisphenol S (BPS), an estrogen receptor (ER) agonist, on the lactating mammary gland; the arcuate nucleus, a region of the hypothalamus important for neuroendocrine control of lactational behaviors; and nursing behavior in CD-1 mice. Female mice were exposed to vehicle, 2 or 200 µg BPS/kg/d from pregnancy day 9 until lactational day (LD) 20, and tissues were collected on LD21...
October 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28972407/the-role-of-the-ovarian-cycle-and-the-effects-of-mitogen-induced-cytokines-on-human-prolactin-gene-expression-in-peripheral-blood-mononuclear-cells
#10
Leticia González, Saúl Lira-Albarrán, Isabel Méndez, Lorenza Díaz, Fernando Larrea
BACKGROUND: little is known on the influences of normal menstrual cycle on prolactin gene expression in immune cells. AIM OF THE STUDY: to determine the effects of the ovarian cycle on prolactin and its receptor expression. METHODS: peripheral blood mononuclear cells (PBMC) were obtained from twenty-six normal menstruating women at different intervals of their menstrual cycle. The PBMC were incubated during 24 h in the presence or absence of Concanavalin-A (Con-A) and the gene expression of PRL, PRLR and cytokines was evaluated by qPCR...
October 3, 2017: Endocrine Research
https://www.readbyqxmd.com/read/28971230/effects-of-2-bromoterguride-a-dopamine-d2-receptor-partial-agonist-on-cognitive-dysfunction-and-social-aversion-in-rats
#11
Emilia Tarland, Robert T Franke, Heidrun Fink, Heinz H Pertz, Jan Brosda
RATIONALE: 2-Bromoterguride, a dopamine D2 receptor partial agonist with antagonist properties at serotonin 5-HT2A receptors and α2C-adrenoceptors, meets the prerequisites of a putative atypical antipsychotic drug (APD). We recently showed that 2-bromoterguride is effective in tests of positive symptoms of schizophrenia in rats without inducing extrapyramidal side effects or metabolic changes. OBJECTIVE: In continuation of our recent work, we now investigated the effect of 2-bromoterguride on apomorphine and phencyclidine (PCP)-induced disruptions of prepulse inhibition (PPI) of the acoustic startle response, a measure of sensory gating...
October 3, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28970469/extrapyramidal-side-effects-of-antipsychotics-are-linked-to-their-association-kinetics-at-dopamine-d2-receptors
#12
David A Sykes, Holly Moore, Lisa Stott, Nicholas Holliday, Jonathan A Javitch, J Robert Lane, Steven J Charlton
Atypical antipsychotic drugs (APDs) have been hypothesized to show reduced extrapyramidal side effects (EPS) due to their rapid dissociation from the dopamine D2 receptor. However, support for this hypothesis is limited to a relatively small number of observations made across several decades and under different experimental conditions. Here we show that association rates, but not dissociation rates, correlate with EPS. We measured the kinetic binding properties of a series of typical and atypical APDs in a novel time-resolved fluorescence resonance energy transfer assay, and correlated these properties with their EPS and prolactin-elevating liabilities at therapeutic doses...
October 2, 2017: Nature Communications
https://www.readbyqxmd.com/read/28963736/expression-of-gnrh-receptor-in-the-canine-corpus-luteum-and-luteal-function-following-deslorelin-acetate-induced-puberty-delay
#13
D Kaya, A Gram, M P Kowalewski, S Schäfer-Somi, M Kuru, A Boos, S Aslan
The goals of this study were as follows: (Experiment 1) to examine the basic capability of canine corpora lutea (CL) to respond to GnRH by assessing expression of gonadotropin-releasing hormone receptor (GnRH-R) in luteal samples collected throughout the luteal lifespan from non-pregnant dogs, and (Experiment 2) to investigate the effects of pre-pubertal application of the GnRH agonist deslorelin acetate on luteal function following the first oestrus. Mature CL were collected during the mid-luteal phase (days 30-45) from treated and control bitches...
September 30, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28955800/transcriptome-analysis-of-mammary-epithelial-cell-gene-expression-reveals-novel-roles-of-the-extracellular-matrix
#14
Stephen S Wanyonyi, Amit Kumar, Ryan Du Preez, Christophe Lefevre, Kevin R Nicholas
BACKGROUND: The unique lactation strategy of the tammar wallaby (Macropus eugeni) has been invaluable in evaluating the role of lactogenic hormones and the extracellular matrix (ECM) in the local control of mammary gland function. However molecular pathways through which hormones and ECM exert their effect on wallaby mammary gland function remain unclear. This study undertakes transcriptome analysis of wallaby mammary epithelial cells (WallMEC) following treatment with mammary ECM from two distinct stages of lactation...
December 2017: Biochemistry and Biophysics Reports
https://www.readbyqxmd.com/read/28946556/the-mechanism-of-selfheal-extract-in-treating-hyperprolactinemia
#15
Suxian Luan, Xiaomei Xu, Meiling Mu, Liangzhi Sun
OBJECTIVE: Selfheal has been used for many years in hyperprolactinemia induced galactorrhea, menstrual disorders, and dysgenesis with satisfactory curative effect. However, its mechanism is still unclear. This study intended to investigate the effect of selfheal extract on hyperprolactinemia in vivo and in vitro, in order to elucidate its mechanism of anti-hyperprolactinemia. PATIENTS AND METHODS: Hyperprolactinemia rat model was established. High dose (28.8 g/(kg⋅d)), middle dose (14...
September 15, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28938149/the-genetic-influence-in-fluorosis
#16
REVIEW
Sreemanta Pramanik, Depanwita Saha
Fluorosis, caused by ingestion of excess fluoride, is endemic in at least 25 countries across the globe, China and India being the worst affected among them. Dental, skeletal and non-skeletal are the major types of fluorosis affecting millions of people in these countries. A number of genetic epidemiological studies carried out by investigators have shown the evidence for association between genetic polymorphisms in candidate genes and differences in the susceptibility pattern of different types of fluorosis among individuals living in the same community and having the same environmental exposure...
September 15, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28930160/human-chorionic-gonadotrophin-as-a-possible-mediator-of-leiomyoma-growth-during-pregnancy-molecular-mechanisms
#17
REVIEW
Veronica Sarais, Greta Chiara Cermisoni, Matteo Schimberni, Alessandra Alteri, Enrico Papaleo, Edgardo Somigliana, Paola Vigano'
Uterine fibroids are the most common gynecologic benign tumors. Studies supporting a strong pregnancy-related growth of leiomyomas generally claimed a crucial role of sex steroid hormones. However, sex steroids are unlikely the unique actors involved as estrogen and progesterone achieve a pick serum concentration in the last trimester while leiomyomas show a typical increase during the first trimester. Given the rapid exponential raise in serum human Chorionic Gonadotrophin (hCG) at the beginning of gestation, we conducted a review to assess the potential role of hCG in the striking growth of leiomyomas during initial pregnancy...
September 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28927875/dynamic-responses-of-prolactin-growth-hormone-and-their-receptors-to-hyposmotic-acclimation-in-the-olive-flounder-paralichthys-olivaceus
#18
Mingzhe Yuan, Qianqian Jia, Ting Wang, Qi Lu, Langlang Tang, Youji Wang, Weiqun Lu
Prolactin (PRL) and growth hormone (GH) play important roles in regulating salt and water balance through osmoregulatory organs in vertebrates. The aim of this study was to investigate the dynamic changes of GH/PRL hormone gene expressions in the pituitary gland and their receptors in gill and kidney, as well as the plasma osmolality when the olive flounder fish Paralichthys olivaceus were acclimated in freshwater (FW) conditions. After transfer from seawater (SW) to freshwater (FW), the osmolality of FW-adaption fish reached the lowest level at 1d which rose slightly afterwards...
December 1, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28923971/prolactin-action-in-the-medial-preoptic-area-is-necessary-for-postpartum-maternal-nursing-behavior
#19
Rosemary S E Brown, Mari Aoki, Sharon R Ladyman, Hollian R Phillipps, Amanda Wyatt, Ulrich Boehm, David R Grattan
Pregnancy hormones, such as prolactin, sensitize neural circuits controlling parental interactions to induce timely activation of maternal behaviors immediately after parturition. While the medial preoptic area (MPOA) is known to be critical for maternal behavior, the specific role of prolactin in this brain region has remained elusive. Here, we evaluated the role of prolactin action in the MPOA using complementary genetic strategies in mice. We characterized prolactin-responsive neurons within the MPOA at different hormonal stages and delineated their projections in the brain...
October 3, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28919264/prolactin-alters-the-mammary-epithelial-hierarchy-increasing-progenitors-and-facilitating-ovarian-steroid-action
#20
Kathleen A O'Leary, Michael P Shea, Stephanie Salituro, Courtney E Blohm, Linda A Schuler
Hormones drive mammary development and function and play critical roles in breast cancer. Epidemiologic studies link prolactin (PRL) to increased risk for aggressive cancers that express estrogen receptor α (ERα). However, in contrast to ovarian steroids, PRL actions on the mammary gland outside of pregnancy are poorly understood. We employed the transgenic NRL-PRL model to examine the effects of PRL alone and with defined estrogen/progesterone exposure on stem/progenitor activity and regulatory networks that drive epithelial differentiation...
October 10, 2017: Stem Cell Reports
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