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https://www.readbyqxmd.com/read/29767811/peripartum-cardiomyopathy
#1
T Koenig, D Hilfiker-Kleiner, J Bauersachs
Peripartum cardiomyopathy (PPCM) is a rare and potentially life-threatening disease that occurs toward the end of pregnancy or in the months following delivery in previously heart-healthy women. The incidence varies widely depending on geographical region and ethnic background, with an estimated number of 1 in 1000-1500 pregnancies in Germany. The course of the disease ranges from mild forms with minor symptoms to severe forms with acute heart failure and cardiogenic shock. The understanding of the etiology of PPCM has evolved in recent years...
May 16, 2018: Herz
https://www.readbyqxmd.com/read/29767567/impact-of-ntrk2-drd2-and-ace-polymorphisms-on-prolactin-levels-in-antipsychotic-treated-patients-with-first-episode-psychosis
#2
Patricia Gassó, Sergi Mas, Miquel Bioque, Bibiana Cabrera, Antonio Lobo, Ana González-Pinto, Covadonga M Díaz-Caneja, Iluminada Corripio, Eduard Vieta, Josefina Castro-Fornieles, Salvador Sarró, Anna Mané, Julio Sanjuan, Adrián Llerena, Amalia Lafuente, Jerónimo Saiz-Ruiz, Miguel Bernardo
BACKGROUND: Hyperprolactinemia is a common side-effect of antipsychotics (APs), which may trigger serious secondary problems and compromise the adherence to treatment which is crucial for prognosis, especially in patients presenting with a first-episode of psychosis (FEP). AIMS: We evaluated, in some cases for the first time, the effect of polymorphisms in multiple candidate genes on serum prolactin (PRL) levels in an AP-treated FEP cohort recruited in the multicenter PEPs study (Phenotype - genotype and environmental interaction; Application of a predictive model in first psychotic episodes)...
May 1, 2018: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/29759042/melatonin-prevents-and-ameliorates-lead-induced-gonadotoxicity-through-antioxidative-and-hormonal-mechanisms
#3
Luqman Aribidesi Olayaki, Isiaka Abdullateef Alagbonsi, Amin Halimat Abdulrahim, Wale Johnson Adeyemi, Muftiat Bakare, Noah Omeiza
We investigated the effects of melatonin on sperm parameters and some biochemical markers in lead-exposed male Wistar rats. Lead (50 mg/kg bw/day) and/or melatonin (4 mg/kg or 10 mg/kg bw/day) was administered for 4 weeks, while 2-week lead exposure was preceded by or followed by 2-week treatment with both doses of melatonin in other groups. Lead reduced glutathione, catalase, adjusted testes weight, semen parameters but did not change malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase, and total antioxidant capacity...
January 1, 2018: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/29733861/effects-of-puerarin-on-estrogen-regulated-gene-expression-in-gonadotropin-releasing-hormone-pulse-generator-of-ovariectomized-rats
#4
Panida Loutchanwoot, Tina Vortherms
Effects of puerarin on the hypothalamic gonadotropin-releasing hormone (GnRH) pulse generator function is investigated, for the first time, in ovariectomized rats at the level of mRNA expression of estrogen-responsive genes, e.g., estrogen receptor (ER), GnRH and its receptor (GnRHR). Rats were treated orally for 90 days either with a soy-free diet containing two different doses of puerarin (low dose of 600 mg/kg and high dose of 3000 mg/kg) or estradiol benzoate (E2B) at either low dose (4.3 mg/kg) or high dose (17...
May 4, 2018: Steroids
https://www.readbyqxmd.com/read/29728876/kisspeptin-and-lh-pulsatile-temporal-coupling-in-pcos-patients
#5
Krzysztof Katulski, Agnieszka Podfigurna, Adam Czyzyk, Blazej Meczekalski, Alessandro D Genazzani
PURPOSE: To evaluate the temporal coupling between spontaneous kisspeptin and luteinizing hormone (LH) pulsatile releases in polycystic ovary syndrome (PCOS) patients. METHODS: We examined 71 patients diagnosed with PCOS. A 2 h pulsatility study was performed to evaluate serum kisspeptin and LH pulse frequency and concentration, sampled every 10 min; baseline follicle-stimulating hormone (FSH), estradiol (E2), prolactin (PRL), cortisol, 17-hydroksy-progesterone (17OHP), testosterone (T), free testosterone index (FTI, and insulin levels were also measured...
May 4, 2018: Endocrine
https://www.readbyqxmd.com/read/29720711/in-vitro-and-in-vivo-characterization-of-pcc0104005-a-novel-modulator-of-serotonin-dopamine-activity-as-an-atypical-antipsychotic-drug
#6
Yanan Xu, Xiaoyin Zhu, Hongbo Wang, Shanyue Sun, Xin Yue, Jingwei Tian
PCC0104005 is a novel drug candidate for treating schizophrenia that displays high affinity for serotonin, dopamine, and noradrenaline receptors, including partial agonism at dopamine D2 , D3 , D4 , serotonin 5-HT1A , and 5-HT2A receptors and antagonism at 5-HT2B , 5-HT6 , and 5-HT7 receptors. PCC0104005 blocks MK-801-induced hyperactivity in rats, consistent with the reduction in dopamine D2 receptor stimulation and increased dopamine release in the medial prefrontal cortex. PCC0104005 inhibits 5-HTP-induced head twitches in rats, due to its moderate affinity for human 5-HT2A receptors (Ki = 5...
May 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29713535/hyperprolactinaemia-in-male-infertility-clinical-case-scenarios
#7
Zeinab Dabbous, Stephen L Atkin
Objective: To explore the evaluation, treatment and impact of hyperprolactinaemia on male infertility and testicular function, as hyperprolactinaemia is commonly detected during the evaluation of infertile men. Methods: A literature search was performed using MEDLINE/PubMed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines to identify all studies exploring hyperprolactinaemia in male infertility. Results: Elevated levels of serum prolactin have a detrimental effect on male reproduction through inhibition of the pulsatile release of gonadotrophins from the anterior pituitary gland, and a direct effect on spermatogenesis...
March 2018: Arab Journal of Urology
https://www.readbyqxmd.com/read/29706934/isotocin-regulates-growth-hormone-but-not-prolactin-release-from-the-pituitary-of-ricefield-eels
#8
Wei Yang, Ning Zhang, Boyang Shi, Shen Zhang, Lihong Zhang, Weimin Zhang
The neurohypophyseal hormone oxytocin (Oxt) has been shown to stimulate prolactin (Prl) synthesis and release from the adenohypophysis in rats. However, little is known about the functional roles of Oxt-like neuropeptides in the adenohypophysis of non-mammalian vertebrates. In this study, cDNAs encoding ricefield eel oxytocin-like receptors (Oxtlr), namely isotocin (Ist) receptor 1 (Istr1) and 2 (Istr2), were isolated and specific antisera were generated, respectively. RT-PCR and Western blot analysis detected the presence of both Istr1 and Istr2 in the brain and pituitary, but differential expression in some peripheral tissues, including the liver and kidney, where only Istr1 was detected...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29671937/quercetin-improves-postpartum-hypogalactia-in-milk-deficient-mice-via-stimulating-prolactin-production-in-pituitary-gland
#9
Man Lin, Na Wang, Bei Yao, Yao Zhong, Yan Lin, Tianhui You
Postpartum dysgalactia is a common clinical problem for lactating women. Seeking out the safe and efficient phytoestrogens will be a promising strategy for postpartum dysgalactia therapy. In this study, the postpartum mice within four groups, including control group, the model group, and the treatment groups intragastrically administrated with normal saline, bromocriptine, bromocriptine plus 17α-ethinyl estradiol, and bromocriptine plus quercetin, respectively, were used. The results showed that quercetin, a kind of natural phytoestrogen, could efficiently promote lactation yield and mammary gland development in the agalactosis mice produced by bromocriptine administration...
April 19, 2018: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29622766/olfactory-marker-protein-regulates-prolactin-secretion-and-production-by-modulating-ca-2-and-trh-signaling-in-lactotrophs
#10
Chan Woo Kang, Ye Eon Han, Mi Kyung Lee, Yoon Hee Cho, NaNa Kang, JaeHyung Koo, Cheol Ryong Ku, Eun Jig Lee
Olfactory marker protein (OMP) is a marker of olfactory receptor-mediated chemoreception, even outside the olfactory system. Here, we report that OMP expression in the pituitary gland plays a role in basal and thyrotropin-releasing hormone (TRH)-induced prolactin (PRL) production and secretion. We found that OMP was expressed in human and rodent pituitary glands, especially in PRL-secreting lactotrophs. OMP knockdown in GH4 rat pituitary cells increased PRL production and secretion via extracellular signal-regulated kinase (ERK)1/2 signaling...
April 6, 2018: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/29620680/triptorelin-for-fertility-preservation-in-adolescents-treated-with-chemotherapy-for-cancer
#11
Mariaclaudia Meli, Manuela Caruso-Nicoletti, Milena La Spina, Luca Lo Nigro, Piera Samperi, Salvatore D'Amico, Francesco Bellia, Vito Miraglia, Maria Licciardello, Emanuela Cannata, Silvia Marino, Carla Cimino, Federica Puglisi, Laura Lo Valvo, Agnese Pezzulla, Giovanna Russo, Andrea Di Cataldo
BACKGROUND: Triptorelin, a gonadotropin releasing hormone analogue, can be administered to postpubertal female individuals with cancer who receive chemotherapy to obtain menstrual suppression and decrease the risk of hemorrhage caused by thrombocytopenia. Our goal was to assess whether triptorelin also has a protective role against the gonadotoxicity of chemotherapy. PATIENTS AND METHODS: This retrospective observational study includes all postmenarchal female patients who presented to our Unit from 2000 to 2015 and received chemotherapy for cancer...
April 3, 2018: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/29620428/dietary-dopamine-depletion-blunts-reward-network-sensitivity-to-face-trustworthiness
#12
Leslie A Zebrowitz, Jasmine Boshyan, Noreen Ward, Luke Hanlin, Jutta M Wolf, Nouchine Hadjikhani
Research demonstrating responsiveness of the neural reward network to face trustworthiness has not assessed whether the effects are mediated by dopaminergic function. We filled this gap in the literature by investigating whether dietary dopamine depletion would blunt the sensitivity of neural activation to faces varying in trustworthiness across reward regions as well as the sensitivity of behavioral responses to those faces. As prolactin release is negatively regulated by dopamine, peripheral prolactin levels confirmed the efficacy of our manipulation...
March 1, 2018: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/29615476/neuronostatin-exerts-actions-on-pituitary-that-are-unique-from-its-sibling-peptide-somatostatin
#13
Raul M Luque, Rhonda D Kineman
Neuronostatin, a somatostatin gene-encoded peptide, exerts important physiological and metabolic actions in diverse tissues. However, the direct biological effects of neuronostatin on pituitary function of humans and primates are still unknown. This study used baboon (Papio anubis) primary pituitary cell cultures, a species that closely models human physiology, to demonstrate that neuronostatin inhibits basal, but not ghrelin-/GnRH-stimulated, GH and LH secretion in a dose- and time-dependent fashion, without affecting the secretion of other pituitary hormones (prolactin, ACTH, FSH, TSH) or changing mRNA levels...
April 3, 2018: Journal of Endocrinology
https://www.readbyqxmd.com/read/29614684/novel-lipidized-analog-of-prolactin-releasing-peptide-improves-memory-impairment-and-attenuates-hyperphosphorylation-of-tau-protein-in-a-mouse-model-of-tauopathy
#14
Andrea Popelová, Veronika Pražienková, Barbora Neprašová, Barbora Judita Kasperová, Lucie Hrubá, Martina Holubová, Jana Zemenová, David Blum, Blanka Železná, Marie-Christine Galas, Jaroslav Kuneš, Lenka Maletínská
Obesity and type 2 diabetes mellitus (T2DM) were characterized as risk factors for Alzheimer's disease (AD) development. Subsequently, T2DM drugs, such as liraglutide, were proven to be neuroprotective compounds attenuating levels of amyloid deposits, and tau hyperphosphorylation, both hallmarks of AD. The central anorexigenic effects of liraglutide inspired us to examine the potential neuroprotective effects of palm11-PrRP31, a strong anorexigenic analog with glucose-lowering properties, in THY-Tau22 mice overexpressing mutated human tau, a model of AD-like tau pathology...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29601847/repeated-peripheral-administration-of-lipidized-prolactin-releasing-peptide-analog-induces-c-fos-and-fosb-expression-in-neurons-of-dorsomedial-hypothalamic-nucleus-in-male-c57-mice
#15
Zdenko Pirník, Mária Kolesárová, Blanka Železná, Lenka Maletínská
Previous studies indicate that hypothalamic prolactin-releasing peptide (PrRP), signaling via GPR10 and neuropeptide FF2 receptor, is involved in energy homeostasis, stress responses, and cardiovascular regulation. Energy homeostasis depends on the balance between food intake regulation and energy expenditure, in which the hypothalamus plays a key role. The lipidization of PrRP31 with palmitoyl acid allows it to produce its anorexigenic effect after repeated peripheral administration and to reduce body weight and improve metabolic parameters in diet-induced obese (DIO) mice...
March 27, 2018: Neurochemistry International
https://www.readbyqxmd.com/read/29599723/brain-transcriptome-profiling-analysis-of-nile-tilapia-oreochromis-niloticus-under-long-term-hypersaline-stress
#16
Yan Liu, Erchao Li, Chang Xu, Yujie Su, Jian G Qin, Liqiao Chen, Xiaodan Wang
The fish brain plays an important role in controlling growth, development, reproduction, and adaptation to environmental change. However, few studies stem from the perspective of whole transcriptome change in a fish brain and its response to long-term hypersaline stress. This study compares the differential transcriptomic responses of juvenile Nile tilapia ( Oreochromis niloticus ) maintained for 8 weeks in brackish water (16 practical salinity units, psu) and in freshwater. Fish brains from each treatment were collected for RNA-seq analysis to identify potential genes and pathways responding to hypersaline stress...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29596024/autocrine-actions-of-prolactin-contribute-to-the-regulation-of-lactotroph-function-in-vivo
#17
Valérie Bernard, Sophie Lamothe, Isabelle Beau, Anne Guillou, Agnès Martin, Paul Le Tissier, David Grattan, Jacques Young, Nadine Binart
Prolactin (PRL), whose principal role is regulation of lactation, is mainly synthesized and secreted by lactotroph anterior pituitary cells. Its signaling is exerted via a transmembrane PRL receptor (PRLR) expressed in a wide variety of tissues, including the anterior pituitary. Dopamine, which is secreted by tuberoinfundibular hypothalamic neurons, is the major inhibitory regulator of prolactin secretion. Although PRL is well established to stimulate hypothalamic dopamine secretion, thereby exerting a negative feedback regulation on its own release, autocrine or paracrine actions of PRL on lactotroph cells have also been suggested...
March 29, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29594256/from-consternation-to-revelation-discovery-of-a-role-for-igsf1-in-pituitary-control-of-thyroid-function
#18
REVIEW
Daniel J Bernard, Emilie Brûlé, Courtney L Smith, Sjoerd D Joustra, Jan M Wit
Immunoglobulin superfamily, member 1 (IGSF1) is a transmembrane glycoprotein highly expressed in the mammalian pituitary gland. Shortly after its discovery in 1998, the protein was proposed to function as a coreceptor for inhibins (and was even temporarily renamed inhibin binding protein). However, subsequent investigations, both in vitro and in vivo , failed to support a role for IGSF1 in inhibin action. Research on IGSF1 nearly ground to a halt until 2011, when next-generation sequencing identified mutations in the X-linked IGSF1 gene in boys and men with congenital central hypothyroidism...
March 1, 2018: Journal of the Endocrine Society
https://www.readbyqxmd.com/read/29594158/effect-of-melatonin-implants-during-the-non-breeding-season-on-the-onset-of-ovarian-activity-and-the-plasma-prolactin-in-dromedary-camel
#19
Khalid El Allali, Abdelmalek Sghiri, Hanan Bouâouda, Mohamed Rachid Achaâban, Mounir Ouzir, Béatrice Bothorel, Mohammed El Mzibri, Najia El Abbadi, Adnane Moutaouakkil, Ahmed Tibary, Paul Pévet
To examine a possible control of reproductive seasonality by melatonin, continual-release subcutaneous melatonin implants were inserted 4.5 months before the natural breeding season (October-April) into female camels (Melatonin-treated group). The animals were exposed to an artificial long photoperiod (16L:8D) for 41 days prior to implant placement to facilitate receptivity to the short-day signal that is expected with melatonin implants. The treated and control groups (untreated females) were maintained separately under outdoor natural conditions...
2018: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29518740/sleep-endocrine-effects-of-growth-hormone-releasing-hormone-ghrh-in-patients-with-schizophrenia
#20
Heike Künzel, Katja Held, Dagmar Schmidt, Marc Ziegenbein, Harald Murck, Axel Steiger
Changes in sleep-EEG after endocrine stimulation tests in patients with schizophrenia include reduced sleep efficiency, prolonged sleep latency and increased awaking after sleep onset Findings on sleep associated growth hormone (GH) secretion were ambiguous. The aim of this study was to elucidate the sleep-endocrine activity especially in the GH system of patients with schizophrenia after repeated administration of GHRH. The effect of repetitive injections of 4 × 50 μg GHRH between 22.00 and 01.00 h on sleep endocrine parameters was investigated in 9 patients diagnosed for schizophrenia...
June 2018: Journal of Psychiatric Research
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