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Relaxin

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https://www.readbyqxmd.com/read/28913296/effect-of-relaxin-expressing-adenovirus-on-scar-remodeling-a-preliminary-study
#1
Bok Ki Jung, Won Jai Lee, Eunhye Kang, Hyo Min Ahn, Yong Oock Kim, Dong Kyun Rah, Chae-Ok Yun, In Sik Yun
BACKGROUND: Relaxin is a transforming growth factor β1 antagonist. To determine the effects of relaxin on scar reduction, we investigated the scar remodeling process by injecting relaxin-expressing adenoviruses using a pig scar model. METHODS: Scars with full thickness were generated on the backs of Yorkshire pigs. Scars were divided into two groups (relaxin [RLX] and Control). Adenoviruses were injected into the RLX (expressing relaxin) and Control (not expressing relaxin) groups...
March 2017: Arch Craniofac Surg
https://www.readbyqxmd.com/read/28895644/relaxin-inhibits-cardiac-fibrosis-in-diabetic-rats-roles-of-protein-kinase-c%C3%AE
#2
Ping Wang, Meng Li, Lei Dong, Hui Chen, Wei Su, Yu-Peng Wang
Relaxin (Rlx) is known to antagonize diabetic cardiac fibrosis. However, its mechanism is poorly understood. Protein kinase Cδ (PKCδ) plays a crucial role in diabetic cardiomyopathy (DCM). This study explored the involvement of PKCδ in Rlx's capacity of suppressing cardiac fibrosis in a rat model of type 2 diabetes mellitus (DM). Type 2 DM of 8-week-old male Sprague-Dawley (SD) rats was induced by a high-fat diet and the injection of streptozocin (STZ, 40 mg/kg). Fourteen-week-old rats with DM and rats in control group which were pre-treated for 1 week with human recombinant relaxin (rhRlx, 30 μg/kg...
September 11, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28889219/a-validated-uplc-ms-ms-method-coupled-with-protein-precipitation-and-ion-exchange-solid-phase-extraction-for-the-quantitation-of-porcine-relaxin-b29-in-dog-plasma-and-its-application-to-a-pharmacokinetic-study
#3
Chong Su, Hui Sun, Hong Yang, Lei Yin, Jiwen Zhang, John Paul Fawcett, Jingkai Gu
Porcine relaxin is a 6 kDa peptide hormone of pregnancy with important physiological and pharmacological effects. It contains a number of analogs of which porcine relaxin B29 is one of the most important. To support the development of porcine relaxin B29 as a new drug, we established an UPLC-MS/MS method for its quantitation in dog plasma. Sample preparation by protein precipitation and ion exchange solid phase extraction was followed by UPLC on an XBridge™ BEH300 C18 column at 40 °C in a run time of only 5...
September 9, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28883402/in-search-of-a-small-molecule-agonist-of-the-relaxin-receptor-rxfp1-for-the-treatment-of-liver-fibrosis
#4
Andrew McBride, Anna M Hoy, Mark J Bamford, Danuta E Mossakowska, Martin P Ruediger, Jeremy Griggs, Sapna Desai, Kate Simpson, Ivan Caballero-Hernandez, John P Iredale, Theresa Pell, Rebecca L Aucott, Duncan S Holmes, Scott P Webster, Jonathan A Fallowfield
The peptide hormone human relaxin-2 (H2-RLX) has emerged as a potential therapy for cardiovascular and fibrotic diseases, but its short in vivo half-life is an obstacle to long-term administration. The discovery of ML290 demonstrated that it is possible to identify small molecule agonists of the cognate G-protein coupled receptor for H2-RLX (relaxin family peptide receptor-1 (RXFP1)). In our efforts to generate a new medicine for liver fibrosis, we sought to identify improved small molecule functional mimetics of H2-RLX with selective, full agonist or positive allosteric modulator activity against RXFP1...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28868039/relaxin-2-in-cardiometabolic-diseases-mechanisms-of-action-and-future-perspectives
#5
REVIEW
Sandra Feijóo-Bandín, Alana Aragón-Herrera, Diego Rodríguez-Penas, Manuel Portolés, Esther Roselló-Lletí, Miguel Rivera, José R González-Juanatey, Francisca Lago
Despite the great effort of the medical community during the last decades, cardiovascular diseases remain the leading cause of death worldwide, increasing their prevalence every year mainly due to our new way of life. In the last years, the study of new hormones implicated in the regulation of energy metabolism and inflammation has raised a great interest among the scientific community regarding their implications in the development of cardiometabolic diseases. In this review, we will summarize the main actions of relaxin, a pleiotropic hormone that was previously suggested to improve acute heart failure and that participates in both metabolism and inflammation regulation at cardiovascular level, and will discuss its potential as future therapeutic target to prevent/reduce cardiovascular diseases...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28864207/differential-effects-of-relaxin-3-and-a-selective-relaxin-3-receptor-agonist-on-food-and-water-intake-and-hypothalamic-neuronal-activity-in-rats
#6
Camila de Ávila, Sandrine Chometton, Christophe Lenglos, Juliane Calvez, Andrew L Gundlach, Elena Timofeeva
The neuropeptide relaxin-3 (RLN3) binds with high affinity to its cognate receptor, relaxin-family peptide receptor 3 (RXFP3), and with lower affinity to RXFP1, the cognate receptor for relaxin. Intracerebroventricular (icv) administration of RLN3 in rats strongly increases food and water intake and alters the activity of the hypothalamic-pituitary-adrenal (HPA) and gonadal (HPG) axes, but the relative involvement of RXFP3 and RXFP1 in these effects is not known. Therefore, the effects of icv administration of equimolar (1...
August 31, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28859971/enzyme-linked-immunosorbent-assay-of-relaxin-like-gonad-stimulating-peptide-in-the-starfish-patiria-asterina-pectinifera
#7
Masatoshi Mita, Hidekazu Katayama
A relaxin-like gonad-stimulating peptide (RGP) from starfish Patiria (Asterina) pectinifera is the first identified invertebrate gonadotropin for final gamete maturation. Recently, we succeeded in obtaining specific antibodies against P. pectinifera RGP (PpeRGP). In this study, the antibodies were used for the development of a specific and sensitive enzyme-linked immunosorbent assay (ELISA) for the measurement of PpeRGP. A biotin-conjugated peptide that binds to peroxidase-conjugated streptavidin is specifically detectable using 3, 3', 5, 5'-tetramethylbenzidine (TMB)/hydrogen peroxide as a substrate; therefore, biotin-conjugated RGP (biotin-PpeRGP) was synthesized chemically...
August 28, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28851937/serelaxin-improves-cardiac-and-renal-function-in-doca-salt-hypertensive-rats
#8
Dong Wang, Yuhuan Luo, Komuraiah Myakala, David J Orlicky, Evgenia Dobrinskikh, Xiaoxin Wang, Moshe Levi
Serelaxin, a recombinant form of the naturally occurring peptide hormone relaxin-2, is a pleiotropic vasodilating hormone that has been studied in patients with acute heart failure. In this study, the effects of serelaxin on cardiac and renal function, fibrosis, inflammation and lipid accumulation were studied in DOCA-salt treated rats. Uninephrectomized rats were assigned to two groups: controls provided with normal drinking water and DOCA provided with DOCA pellets and sodium chloride drinking water. After 4 weeks, the DOCA-salt rats were randomly selected and implanted with osmotic minipumps delivering vehicle or serelaxin for another 4 weeks...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28830579/use-of-microcomputed-tomography-to-measure-the-relaxin-induced-expansion-of-intrapubic-ligaments-in-mice
#9
Heather A Zimmerman, Richard P Kennan, Chunlian Zhang, Kashmira Shah, Douglas G Johns, Joseph J Lynch, Maya Dajee
Relaxin is a 6-kDa peptide in the insulin superfamily of hormones. In addition to its effects on reproductive and musculoskeletal ligaments, relaxin has demonstrated beneficial effects on cardiac, renal, and vascular systems in preclinical models. The mouse intrapubic ligament ex vivo bioassay is the current standard for measuring in vivo relaxin bioactivity. However, this bioassay necessitates euthanasia and dissection of large cohorts to measure the intrapubic ligament at specified time points. We hypothesized that μCT imaging could be used to reduce the number of animals necessary for the intrapubic ligament bioassay by enabling a single animal to be followed longitudinally throughout the study rather than euthanizing different cohorts at established time points...
August 1, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/28820402/does-signaling-of-estrogen-related-receptors-affect-structure-and-function-of-bank-vole-leydig-cells
#10
P Pawlicki, A Milon, M Zarzycka, J Galas, W Tworzydlo, A Kaminska, L Pardyak, K Lesniak, A Pacwa, B Bilinska, E Gorowska-Wojtowicz, M Kotula-Balak
To get a deeper insight into the function of estrogen-related receptors (ERRs) and dissect underlying mechanism in Leydig cells, ERRs (type α, β and γ) were blocked or activated in testes of adult bank voles (Myodes glareolus) which show seasonal changes in the intratesticular sex hormones level. Both actively reproducing animals (long day conditions; LD) and those with regression of the reproductive system (short day conditions; SD) received intraperitoneal injections of selective ERRα antagonist 3-[4-(2,4-Bis-trifluoromethylbenzyloxy)-3-methoxyphenyl]-2-cyano-N-(5-trifluoromethyl-1,3,4-thiadiazol-2-yl)acrylamide (XCT 790) or selective ERRβ/ERRγ agonist N-(4-(Diethylaminobenzylidenyl)-N'-(4-hydroxybenzoyl)-hydrazine (DY131) (50 μ/kg bw; six doses every other day)...
June 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28776188/alterations-of-relaxin-and-its-receptor-system-components-in-experimental-diabetic-cardiomyopathy-rats
#11
Xiaohui Zhang, Liya Pan, Kelaier Yang, Yu Fu, Yue Liu, Wenjia Chen, Xiao Ma, Xinhua Yin
High glucose induces apoptosis of cardiomyocytes and fibrosis of cardiac fibroblasts, contributing to diabetic cardiomyopathy. In this work, we explore the production of relaxin alterations and the significance of their receptor system components in the hearts of experimental diabetic cardiomyopathy rats. We measured rat relaxin-1 (equivalent to human relaxin-2), relaxin-3, RXFP1 and RXFP3 mRNA expression in the hearts of experimental diabetic cardiomyopathy rats. Neonatal rat ventricular myocytes (NRVMs) and cardiac fibroblasts were treated with 5...
August 3, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28771323/synthetic-advances-in-insulin-like-peptides-enable-novel-bioactivity
#12
Fa Liu, Pengyun Li, Vasily Gelfanov, John Mayer, Richard DiMarchi
Insulin is a miraculous hormone that has served a seminal role in the treatment of insulin-dependent diabetes for nearly a century. Insulin resides within in a superfamily of structurally related peptides that are distinguished by three invariant disulfide bonds that anchor the three-dimensional conformation of the hormone. The additional family members include the insulin-like growth factors (IGF) and the relaxin-related set of peptides that includes the so-called insulin-like peptides. Advances in peptide chemistry and rDNA-based synthesis have enabled the preparation of multiple insulin analogues...
August 3, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28757457/dual-transmitter-systems-regulating-arousal-attention-learning-and-memory
#13
REVIEW
Sherie Ma, Balázs Hangya, Christopher S Leonard, William Wisden, Andrew L Gundlach
An array of neuromodulators, including monoamines and neuropeptides, regulate most behavioural and physiological traits. In the past decade, dramatic progress has been made in mapping neuromodulatory circuits, in analysing circuit dynamics, and interrogating circuit function using pharmacogenetic, optogenetic and imaging methods This review will focus on several distinct neural networks (acetylcholine/GABA/glutamate; histamine/GABA; orexin/glutamate; and relaxin-3/GABA) that originate from neural hubs that regulate wakefulness and related attentional and cognitive processes, and highlight approaches that have identified dual transmitter roles in these behavioural functions...
July 27, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28733228/progressive-erosion-of-the-relaxin1-gene-in-bovids
#14
Loggan Malone, Juan C Opazo, Peter L Ryan, Federico G Hoffmann
The relaxin/insulin-like (RLN/INSL) gene family is a group of genes that encode peptide hormones involved in a variety of physiological functions related to reproduction. Previous studies have shown that relaxin plays a key role in widening of the pubic bone during labor and in gamete maturation. Because of these functions, studying the evolution of RLN1, the gene encoding for relaxin, is relevant in livestock species, most of which belong in the group Laurasiatheria, which includes cow, pig, horse, goat, and sheep in addition to bats, cetaceans and carnivores...
October 1, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28726252/central-amygdala-relaxin-3-relaxin-family-peptide-receptor-3-signalling-modulates-alcohol-seeking-in-rats
#15
Leigh C Walker, Hanna E Kastman, Elena V Krstew, Andrew L Gundlach, Andrew J Lawrence
BACKGROUND AND PURPOSE: Alcohol use disorders are a leading cause of preventable deaths worldwide, and stress is a major trigger of relapse. The neuropeptide relaxin-3 and its cognate receptor, relaxin family peptide receptor 3 (RXFP3), modulate stress-induced relapse to alcohol seeking in rats, and while the bed nucleus of the stria terminalis has been implicated in this regard, the central nucleus of the amygdala (CeA) also receives a relaxin-3 innervation and CeA neurons densely express RXFP3 mRNA...
October 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28688805/low-level-of-ochratoxin-a-affects-genome-wide-expression-in-kidney-of-pig
#16
Daniela Eliza Marin, Cornelia Braicu, Mihai Alexandru Gras, Gina Cecilia Pistol, Roxana Cojocneanu Petric, Ioana Berindan Neagoe, Mihai Palade, Ionelia Taranu
Ochratoxin A (OTA) is a mycotoxin produced by fungus belonging to Aspergillus and Penicillium genra. The aim of the present paper was to investigate if a low concentration OTA has toxic effect in pigs. Twelve piglets were fed with a control or an OTA (0.05 mg/kg feed) contaminated diet. After 30 days, animals were slaughtered and samples of blood and kidney were used for further analyses. The mycotoxin analyses showed a significant higher (6.25 times) concentration of OTA in the kidney of OTA intoxicated piglets than in control ones...
July 6, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28674503/male-seminal-relaxin-contributes-to-induction-of-the-post-mating-cytokine-response-in-the-female-mouse-uterus
#17
Danielle J Glynn, Kee Heng, Darryl L Russell, David J Sharkey, Sarah A Robertson, Ravinder Anand-Ivell, Richard Ivell
The hormone relaxin is important in female reproduction for embryo implantation, cardiovascular function, and during labor and lactation. Relaxin is also synthesized in males by organs of the male tract. We hypothesized that relaxin might be one component of seminal plasma responsible for eliciting the female cytokine response induced in the uterus at mating. When recombinant relaxin was injected into the uterus of wild-type (Rln(+/+)) mice at estrus, it evoked the production of Cxcl1 mRNA and its secreted protein product CXCL1 in four of eight animals...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28674260/relaxin-ameliorates-renal-fibrosis-and-expression-of-endothelial-cell-transition-markers-in-rats-of-isoproterenol-induced-heart-failure
#18
Gaoshu Zheng, Jiejie Cai, Xingxing Chen, Lingzhi Chen, Wenhua Ge, Xi Zhou, Hao Zhou
There may be cardio-renal interactions in rats of isoproterenol-induced heart failure, which may be associated with renal fibrosis and endothelial-to-mesenchymal transition (EndMT). Since its discovery, relaxin (RLX) which was regarded as a reproductive hormone for a long time, is recently considered an effective antifibrotic hormone in cardiac and renal fibrosis. We studied whether RLX diminished renal fibrosis in rats of isoproterenol (Iso)-induced heart failure and investigated the mechanism. Fifty male Sprague-Dawley rats were separated into five groups for treatment: control; Iso subcutaneously injection to induce heart failure, which led to renal fibrosis; RLX subcutaneously injection at low, medium and high dose (0...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28667126/functional-implications-of-the-relaxin-rln-system-in-the-dog-throughout-pregnancy-and-at-term
#19
Marta Nowak, Aykut Gram, Alois Boos, Selim Aslan, Serhan Serhat Ay, Firdevs Önyay, Mariusz Kowalewski
Relaxin (RLN) is a key hormone of pregnancy in mammals best known for its involvement in connective tissue remodeling. In the domestic dog, placental RLN is the only known endocrine marker of pregnancy. However, knowledge is sparse regarding the spatio-temporal expression of RLN and its receptors (RXFP1 and RXFP2) in the canine uterus and placenta. Here, their expression was investigated in the pre-implantation uterus and utero-placental compartments (UtPl) at selected time points during gestation: post-implantation, mid-gestation, and at normal and antigestagen-induced luteolysis/abortion...
June 30, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28666004/a-novel-association-between-relaxin-receptor-polymorphism-and-hematopoietic-stem-cell-yield-after-mobilization
#20
Saeam Shin, Juwon Kim, Soo-Zin Kim-Wanner, Halvard Bönig, Sung Ran Cho, Sinyoung Kim, Jong Rak Choi, Kyung-A Lee
Mobilization of hematopoietic stem cells (HSCs) from the bone marrow to the peripheral blood is a complex mechanism that involves adhesive and chemotactic interactions of HSCs as well as their bone marrow microenvironment. In addition to a number of non-genetic factors, genetic susceptibilities also contribute to the mobilization outcome. Identification of genetic factors associated with HSC yield is important to better understand the mechanism behind HSC mobilization. In the present study, we enrolled 148 Korean participants (56 healthy donors and 92 patients) undergoing HSC mobilization for allogeneic or autologous HSC transplantation...
2017: PloS One
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