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Prolactin

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https://www.readbyqxmd.com/read/29154740/an-association-analysis-between-prl-genotype-and-milk-production-traits-in-italian-mediterranean-river-buffalo
#1
Jun Li, Aixin Liang, Zipeng Li, Chao Du, Guohua Hua, Angela Salzano, Giuseppe Campanile, Bianca Gasparrini, LiGuo Yang
This Research Communication describes the association between genetic variation within the prolactin (PRL) gene and the milk production traits of Italian Mediterranean river buffalo (Bufala mediterranea Italiana). High resolution melting (HRM) techniques were developed for genotyping 465 buffaloes. The association of genetic polymorphism with milk production traits was performed and subsequently the effects of parity and calving season were evaluated. Single nucleotide polymorphisms (SNPs) were identified at exons 2 and 5 and at introns 1 and 2...
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29153839/asymmetry-between-activation-and-deactivation-during-a-transcriptional-pulse
#2
Lee S S Dunham, Hiroshi Momiji, Claire V Harper, Polly J Downton, Kirsty Hey, Anne McNamara, Karen Featherstone, David G Spiller, David A Rand, Bärbel Finkenstädt, Michael R H White, Julian R E Davis
Transcription in eukaryotic cells occurs in gene-specific bursts or pulses of activity. Recent studies identified a spectrum of transcriptionally active "on-states," interspersed with periods of inactivity, but these "off-states" and the process of transcriptional deactivation are poorly understood. To examine what occurs during deactivation, we investigate the dynamics of switching between variable rates. We measured live single-cell expression of luciferase reporters from human growth hormone or human prolactin promoters in a pituitary cell line...
November 13, 2017: Cell Systems
https://www.readbyqxmd.com/read/29153168/a-100-year-review-mammary-development-and-lactation
#3
R Michael Akers
What is old is new again-and with respect to the study of the mammary development and function in dairy animals, the expression resonates. Many of the mammary and milk production questions raised in the early years of the Journal of Dairy Science apply today. To be sure, scientists have filled in many details regarding, for example, identification of hormones and growth factors important in the control of mammary growth, the onset of copious milk production at calving, and maintenance of lactation. Early years focused on identification and subsequent availability of classic mammogenic, lactogenic, and galactopoietic hormones (e...
December 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29152289/chronic-cluster-like-headache-in-a-patient-with-a-macroprolactinoma-presenting-with-falsely-low-prolactin-levels-bromocriptine-versus-cabergoline
#4
Maria M Pineyro, Gabriela Sosa, Maria R Finozzi, Natalia Stecker, Raul Pisabarro, Maria C Belzarena
Cluster-like headache may be associated with pituitary tumors, mostly prolactinomas. Pituitary imaging and prolactin measurement should be assessed in patients presenting with cluster-like headaches with atypical features or unsatisfactory response to treatment. Furthermore, large pituitary adenomas with moderate increase in prolactin levels should prompt prolactin dilutions to avoid "hook effect".
November 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/29137963/failure-of-a-second-temozolomide-cycle-in-a-patient-with-a-prolactin-secreting-pituitary-carcinoma
#5
Ismene Bilbao, Nerea Egaña, Cristina García, Izaskun Olaizola
No abstract text is available yet for this article.
November 11, 2017: Endocrinología, diabetes y nutrición
https://www.readbyqxmd.com/read/29136752/-the-effect-of-breast-massage-at-different-time-in-the-early-period-after-cesarean-section
#6
J Y Chu, L Zhang, Y J Zhang, M J Yang, X W Li, L L Sun
Objective: To evaluate the effect of breast massage at different time in the early period on maternal lactation after cesarean section. Methods: 80 women delivered by cesarean section were randomly selected from maternity ward of a hospital in Shandong province during Jan. 2013 to Jan. 2015; which were divided into four groups, with 20 patients in each. Three groups received 3 times of breast massage every 24 hoursbeginning from 2, 12 and 24 h after cesarean section, respectively. The control group didn't receive any breast massage...
November 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/29135108/addressing-the-post-irradiation-hypothalamic-pituitary-endocrine-abnormalities-of-brain-tumors-in-pediatric-patients
#7
Louloudenia Velentza, Maria Tolia, Charikleia Christakou, Michail Nikolaou, Ioannis Zerdes, Nikolaos Tsoukalas, Jiannis Hajiioannou, Konstantinos Tsanadis, Georgios Rigas, Michail Mitsis, Kyriaki Theodorou, Kyriaki Pistevou-Gombaki, Periklis Tsekeris, George Kyrgias
PURPOSE: Hypothalamic-pituitary axis is susceptible to radiotherapy, causing endocrine disorders to childhood cancer survivors. We conducted a systematic review in order to assess the radiation-induced toxicity that leads to hormone secretion abnormalities and their severity in children with brain tumors. METHODS: The data were collected by relevant studies on PubMed and EMBASE. Articles up to December 2016 were included. We selected studies which focused on children patients (<18 yr old) with brain tumors treated with radiotherapy and the consequences for their endocrine system...
September 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/29134972/oestrual-phase-at-first-exposure-to-predator-induced-stress-determines-pattern-of-alterations-in-oestrous-cycle-and-endocrine-response-in-the-rat
#8
O O Medubi, B O Iranloye, O A Adegoke
Stress has been acknowledged as one of the aetiologies of female reproductive dysfunction, yet the mechanismsinvolved are not totally elucidated. Based on the paucity of information on how predator-induced stress (PS) affects oestrouscycle in rats, this study was designed to investigate the effect of PS on the oestrous cycle in rats. Forty-eight (48) SpragueDawley rats were used for this study. They were randomly divided into Control and PS group. Each group was divided intofour subgroups (n=6/group) according to the phases of oestrous cycle...
June 30, 2017: Nigerian Journal of Physiological Sciences: Official Publication of the Physiological Society of Nigeria
https://www.readbyqxmd.com/read/29132038/hemodynamics-of-the-corpus-luteum-in-mares-during-experimentally-impaired-luteogenesis-and-partial-luteolysis
#9
J C Ferreira, L F Novaes Filho, Y L Boakari, H S Canesin, D L Thompson, F S Lima, C Meira
The aim of the current project was to characterize the luteal vascularity and the plasma concentrations of progesterone (P4), prolactin (PRL) and 13,14-dihydro-15-keto-PGF2α (PGFM) in mares with luteal disturbances during early and mid-diestrus. In Experiment 1, twenty-one mares were treated with 2 mL of 0.9% NaCl, or 1 mg Dinoprost, or 10 mg Dinoprost on day two after ovulation (Control-D2, 1/10PGF-D2 and PGF-D2 groups, respectively; n = 7 mares/group). In Experiment 2, similar treatments were performed eight days post-ovulation using a different cohort of 21 mares (Control-D8, 1/10PGF-D8 and PGF-D8 groups, respectively; n = 7 mares/group)...
November 4, 2017: Theriogenology
https://www.readbyqxmd.com/read/29124543/determinants-of-prolactin-in-postmenopausal-chinese-women-in-singapore
#10
Tiffany A Katz, Anna H Wu, Frank Z Stanczyk, Renwei Wang, Woon-Puay Koh, Jian-Min Yuan, Steffi Oesterreich, Lesley M Butler
PURPOSE: Mechanistic and observational data together support a role for prolactin in breast cancer development. Determinants of prolactin in Asian populations have not been meaningfully explored, despite the lower risk of breast cancer in Asian populations. METHODS: Determinants of plasma prolactin were evaluated in 442 postmenopausal women enrolled in the Singapore Chinese Health Study, a population-based prospective cohort study. At baseline all cohort members completed an in-person interview that elicited information on diet, menstrual and reproductive history, and lifestyle factors...
November 9, 2017: Cancer Causes & Control: CCC
https://www.readbyqxmd.com/read/29122257/auricular-therapy-for-lactation-a-systematic-review
#11
REVIEW
Melissa Li-Sha Chen, Jing-Yu Tan, Lorna Kwai-Ping Suen
BACKGROUND: Support for breastfeeding has been a matter of considerable interest in healthcare. In the field of traditional and complementary medicine, the effectiveness of auricular therapy on lactation has been investigated by several clinical studies. AIM AND OBJECTIVES: This review was mainly performed to assess the current evidence of auricular therapy on lactation. The objectives were to assess the current evidence of AT for lactation, examine the intervention protocols and outcome measures adopted by the studies included, and inform clinical application and future research in this area...
November 2017: Complementary Therapies in Clinical Practice
https://www.readbyqxmd.com/read/29117457/diurnal-and-photoperiodic-changes-in-thyrotrophin-stimulating-hormone-%C3%AE-tsh%C3%AE-expression-and-associated-regulation-of-deiodinase-enzymes-dio2-dio3-in-the-female-juvenile-chicken-hypothalamus
#12
I C Dunn, P W Wilson, Y Shi, D W Burt, A S I Loudon, P J Sharp
Increased TSHβ expression in the pars tuberalis is thought to be an early step in the neuroendocrine mechanism transducing photoperiodic information. This study aimed to determine the relationship between long-photoperiods (LP) and diurnal TSHβ gene expression in the juvenile chicken by comparing LP-photostimulated birds with groups kept on short photoperiods (SP) for 1 or 12 days. TSHβ expression increased 3 and 23-fold after 1 and 12 days LP-photostimulation both during the day and at night. In both SP and LP conditions, TSHβ expression was between 3 and 14-fold higher at night than in the day, suggesting that TSHβ expression cycles in a diurnal pattern irrespective of photoperiod...
November 8, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29116933/first-line-antituberculosis-drugs-disrupt-endocrine-balance-and-induce-ovarian-and-uterine-oxidative-stress-in-rats
#13
Olayinka A Adebayo, Omolola A Adesanoye, Olalekan A Abolaji, Aderemi O Kehinde, Oluwatosin A Adaramoye
BACKGROUND: The first-line antituberculosis (anti-TB) drugs, isoniazid (INH), rifampicin (RIF), ethambutol (EMB), and pyrazinamide (PZA), are effective in the treatment of pulmonary tuberculosis. However, the toxicity of these drugs in the clinical setting limits their use. Here, we evaluated the effects of anti-TB drugs on the reproductive system in female rats. METHODS: Thirty-five female Wistar rats were assigned into five groups of seven animals each. The control group received normal saline, whereas others received INH (5 mg/kg), RIF (10 mg/kg), EMB (15 mg/kg), and PZA (15 mg/kg) through gavage thrice a week for 8 consecutive weeks...
November 8, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/29115668/mir-26a-promoted-endometrial-epithelium-cells-eecs-proliferation-and-induced-stromal-cells-escs-apoptosis-via-the-pten-pi3k-akt-pathway-in-dairy-goats
#14
Lei Zhang, Xiaorui Liu, Junze Liu, Xingna Ma, Zhanqin Zhou, Yuxuan Song, Binyun Cao
Changes in endometrial cell morphology and function are absolutely necessary for successful embryo implantation. In this study, miR-26a was widely expressed in dairy goats, and was found to be regulated by β-estradiol (E2) and progesterone (P4) in endometrial epithelium cells (EECs) as well as stromal cells (ESCs). Furthermore, miR-26a played a role in the regulation of cells proliferation and apoptosis by directly regulating PTEN and indirectly regulating the PI3K/AKT pathway in EECs but not in ESCs of dairy goats in vitro...
November 8, 2017: Journal of Cellular Physiology
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
#15
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/29113996/characterization-of-the-molecular-mechanisms-underlying-glucose-stimulated-insulin-secretion-from-isolated-pancreatic-%C3%AE-cells-using-ptmomics
#16
Taewook Kang, Pia Jensen, Honggang Huang, Gitte Lund Christensen, Nils Billestrup, Martin R Larsen
Normal pancreatic islet β-cells (PBCs) abundantly secrete insulin in response to elevated blood glucose levels, in order to maintain an adequate control of energy balance and glucose homeostasis. However, the molecular mechanisms underlying the insulin secretion are unclear. Improving our understanding of glucose-stimulated insulin secretion (GSIS) mechanisms under normal conditions is a prerequisite for developing better interventions against diabetes. Here, we aimed at identifying novel signaling pathways involved in the initial release of insulin from PBCs after glucose stimulation using quantitative strategies for the assessment of phosphorylated proteins and sialylated N-linked (SA) glycoproteins...
November 7, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29112461/calcium-and-vitamin-d-supplementation-in-boys-with-risperidone-induced-hyperprolactinemia-a-randomized-placebo-controlled-pilot-study
#17
Chadi A Calarge, James A Mills, Ekhard E Ziegler, Janet A Schlechte
BACKGROUND: The chronic use of antipsychotics has been associated with impaired bone mineralization, partially mediated by hyperprolactinemia. We examined if calcium and vitamin D supplementation promote bone mineral accrual in boys with risperidone-induced hyperprolactinemia. METHODS: Between February 2009 and November 2013, medically healthy, 5- to 17-year-old boys were enrolled in a 36-week double-blind, placebo-controlled study, examining the skeletal effects of supplementation with 1250 mg calcium carbonate and 400 IU of vitamin D3 in risperidone-induced hyperprolactinemia...
November 7, 2017: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/29110337/pituitary-atypical-teratoid-rhabdoid-tumor-in-a-patient-with-prolactinoma-a-unique-description
#18
Valeria Barresi, Simona Lionti, Alessandro Raso, Felice Esposito, Salvatore Cannavò, Filippo F Angileri
Atypical teratoid rhabdoid tumor (ATRT) is an aggressive tumor of the CNS and characteristically occurs in the pediatric age. In adulthood, ATRT is rare and it is mainly localized in the cerebral hemispheres. Only 16 cases of ATRT have been described in the sellar region up to now. Interestingly, all sellar ATRTs occurred in adult female patients. Herein we report a novel case of sellar ATRT in a patient with previous history of lactotroph adenoma. Similar to other sellar ATRTs, this case occurred in a female adult patient...
November 6, 2017: Neuropathology: Official Journal of the Japanese Society of Neuropathology
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
#19
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/29104246/relation-among-aromatase-p450-and-tumoral-growth-in-human-prolactinomas
#20
REVIEW
María José García-Barrado, Enrique J Blanco, María Carmen Iglesias-Osma, Marta Carretero-Hernández, Leonardo Catalano-Iniesta, Virginia Sanchez-Robledo, Manuel Carretero, Julio Joaquín Herrero, Sixto Carrero, José Carretero
The pituitary gland is part of hypothalamic-pituitary-gonadal axis, which controls development, reproduction, and aging in humans and animals. In addition, the pituitary gland is regulated mainly by hormones and neurotransmitters released from the hypothalamus and by systemic hormones secreted by target glands. Aromatase P450, the enzyme responsible for the catabolization of aromatizable androgens to estrogens, is expressed in different parts of body, including the pituitary gland. Moreover, aromatase P450 is involved in sexual dimorphism where alteration in the level of aromatase can initiate a number of diseases in both genders...
November 1, 2017: International Journal of Molecular Sciences
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