Indirect evidence for a physiological role exerted by a "testicular gonadotropin-releasing hormone" in the frog, Rana esculenta.

abstract：:Neuropeptides are ancient endocrine components which have evolved to regulate many aspects of biology across the animal kingdom including behaviour, development and metabolism. To supplement current knowledge, we have utilized a transcriptome series describing larval development in the ornate spiny lobster, Panulirus ...

journal_title：General and comparative endocrinology

authors： Hyde CJ,Nguyen T,Fitzgibbon QP,Elizur A,Smith GG,Ventura T

更新日期：2020-08-01 00:00:00

abstract：:Glucocorticoid hormones are important intermediates between an organism and its environment. They enable an organism to adjust its behavioural and physiological processes in response to environmental changes by binding to mineralocorticoid receptors (MR) and glucocorticoid receptors (GR) expressed in many tissues, inc...

journal_title：General and comparative endocrinology

authors： Béziers P,Ducrest AL,San-Jose LM,Simon C,Roulin A

更新日期：2019-11-01 00:00:00

abstract：:Melanin-concentrating hormone (MCH) mainly regulates feeding in mammals and pigmentation in teleosts. It acts via two G-protein-coupled receptors, MCH receptor 1 (MCHR1) and MCHR2. Although many studies exploring the MCH system in teleosts and mammals have been carried out, studies on other organisms are limited. In t...

journal_title：General and comparative endocrinology

authors： Kobayashi Y,Hamamoto A,Hirayama T,Saito Y

更新日期：2015-02-01 00:00:00

abstract：:Whether administration of the corticotropin-releasing factor (CRF) antagonist alpha-helical CRF(9-41) (hCRF) prevents stress response of the ovary, the oviduct, the adrenals, and the spleen was studied in the lizard Mabuya carinata. Stressors (handling, chasing, and noise) applied randomly, five times a day, for 1 mon...

journal_title：General and comparative endocrinology

authors： Ganesh CB,Yajurvedi HN

更新日期：2002-04-01 00:00:00

abstract：:We have examined the effect of ambient water temperature on the ability of juvenile rainbow trout to respond to estradiol (E2) injection with vitellogenin (Vg) synthesis. Vg appeared in serum within 24 hr of E2 injection in fish kept at 15 degrees and rose to 70 mg/ml over a 10-day treatment period during which four i...

journal_title：General and comparative endocrinology

authors： Mackay ME,Lazier CB

更新日期：1993-02-01 00:00:00

abstract：:Mammals generally respond to the important metabolic requirements imposed by thermoregulation and pregnancy by increasing plasma concentrations of glucocorticoid that promote the mobilization of body reserves and enhance energy use by tissues. This study examined the impact of distinct ambient temperatures and reprodu...

journal_title：General and comparative endocrinology

authors： Michel CL,Chastel O,Bonnet X

更新日期：2011-05-01 00:00:00

abstract：:Prolactin (PRL) plays central roles in a wide range of body functions in mammals, and the actions are mediated by the specific cell surface receptor, the prolactin receptor (PRLR). To better understand the role of PRL in the yak (Bos grunniens), in the present study, we first cloned yak PRLR cDNA, and compared its mRN...

journal_title：General and comparative endocrinology

authors： Zi XD,Chen DW,Wang HM

更新日期：2012-02-01 00:00:00

abstract：:Maintaining energy balance and reproducing are important for fitness, yet animals have evolved mechanisms by which the hypothalamus-pituitary-adrenal/interrenal (HPA/HPI) axis can shut these activities off. While HPA/HPI axis inhibition of feeding and reproduction may have evolved as a predator defense, to date there ...

journal_title：General and comparative endocrinology

authors： Harris BN,Carr JA

更新日期：2016-05-01 00:00:00

abstract：:Fluctuations in plasma androgen (testosterone and 5 alpha-dihydrotestosterone), corticosterone (B), and luteinizing hormone (LH) of male bullfrogs in central California were measured during the spring mating season. Androgen and LH levels generally increased in the population prior to the initiation of chorusing and e...

journal_title：General and comparative endocrinology

authors： Mendonça MT,Licht P,Ryan MJ,Barnes R

更新日期：1985-05-01 00:00:00

abstract：:The neurohypophysial hormones of the eastern gray kangaroo (Macropus giganteus) have been isolated through molecular sieving and paper chromatoelectrophoresis. One oxytocin-like and two vasopressin-like peptides have been found. These peptides have been characterized by amino acid analysis. Mesotocin ([Ile8]-oxytocin)...

journal_title：General and comparative endocrinology

authors： Chauvet MT,Hurpet D,Chauvet J,Acher R

更新日期：1983-01-01 00:00:00

abstract：:Over the last decade, field endocrinologists have explored the efficacy of using plasma corticosterone concentrations of breeding seabirds as an indicator of food availability and predictor of breeding success. However, studies have been predominately confined to adults and the results have been inconsistent. We exami...

journal_title：General and comparative endocrinology

authors： Brewer JH,O'Reilly KM,Dean Kildaw S,Loren Buck C

更新日期：2008-04-01 00:00:00

abstract：:The objective of this review was to summarize and discuss the effects of Polybrominated diphenyl ethers (PBDEs) on thyroid and reproduction systems in fish. We reviewed the evidences and mechanisms for PBDEs-induced thyroid and reproduction disruption, as well as the cross-talk between the two systems in fish. In thyr...

journal_title：General and comparative endocrinology

authors： Yu L,Han Z,Liu C

更新日期：2015-08-01 00:00:00

abstract：:Using combined nicotinamide adenine dinucleotide phosphate-diaphorase (NADPHd) histochemistry and salmon gonadotropin-releasing hormone (sGnRH) immunocytochemistry, it is reported for the first time that possible potential contacts occur between the nitric oxide (NO)- and the GnRH-containing neurons in the brain of a ...

journal_title：General and comparative endocrinology

authors： Baby SM,Ueck M,Prasada Rao PD

更新日期：2000-10-01 00:00:00

abstract：:We have studied the effects of bovine parathyroid hormone (PTH) and salmon calcitonin (CT) on plasma calcium (Ca) and phosphate levels and on renal function in intact and parathyroidectomized (PTX) chickens, using a simple technique that separates urine from feces. In immature males and egg-laying females, the intrave...

journal_title：General and comparative endocrinology

authors： Sommerville BA,Fox J

更新日期：1987-06-01 00:00:00

abstract：:The objective of this study was to examine if RU486, a corticosteroid antagonist, modified hepatocyte metabolism and blocked the metabolic effects of exogenously administered cortisol in rainbow trout (Oncorhynchus mykiss). The fish were given a single intraperitoneal implant of either coconut oil alone or coconut oil...

journal_title：General and comparative endocrinology

authors： Vijayan MM,Reddy PK,Leatherland JF,Moon TW

更新日期：1994-10-01 00:00:00

abstract：:Ghrelin, and nesfatin-1 (encoded by nucleobindin2/nucb2) are two metabolic peptides with multiple biological effects in vertebrates. While sex steroids are known to regulate endogenous ghrelin and NUCB2 in mammals, such actions by steroids in fish remain unknown. This study aimed to determine whether estradiol (E2) an...

journal_title：General and comparative endocrinology

authors： Bertucci JI,Blanco AM,Canosa LF,Unniappan S

更新日期：2016-03-01 00:00:00

abstract：:Components of the renin angiotensin system have been identified in many nonmammalian vertebrates. However, in many of these animals, including reptiles, the physiological functions and importance of the system remain unclear. To aid in the study of the system in a reptile we modified a commercially available radioimmu...

journal_title：General and comparative endocrinology

authors： Stephens GA,Caron B

更新日期：1988-06-01 00:00:00

abstract：:The initiation of sexual maturation and spermatogenesis are complex processes that require the highly coordinated regulation of a number of key genes. The endocrine system plays crucial roles in these processes, but the precise mechanisms involved in sexual maturation of fish are poorly understood. We investigated the...

journal_title：General and comparative endocrinology

authors： Maugars G,Schmitz M

更新日期：2008-11-01 00:00:00

abstract：:The Atlantic Bluefin Tuna (ABFT, Thunnus thynnus) is one of the most intensely exploited fisheries resources in the world. In spite of the years of studies on ABFT, basic aspects of its reproductive biology remain uncertain. To gain insight regarding the seasonal changes of the reproductive characteristics of the east...

journal_title：General and comparative endocrinology

authors： Carnevali O,Maradonna F,Sagrati A,Candelma M,Lombardo F,Pignalosa P,Bonfanti E,Nocillado J,Palma P,Gioacchini G,Elizur A

更新日期：2019-10-01 00:00:00

abstract：:Ecdysis triggering hormone receptors (ETHR) regulate the behavioral sequence necessary for cuticle shedding. Recent reports have documented functions for ETHR signaling in adult Drosophila melanogaster. In this study, we report that ETHR silencing in local interneurons of the antennal lobes and fruitless neurons leads...

journal_title：General and comparative endocrinology

authors： Deshpande SA,Meiselman M,Hice RH,Arensburger P,Rivera-Perez C,Kim DH,Croft RL,Noriega FG,Adams ME

更新日期：2019-07-01 00:00:00

abstract：:Increasing evidence shows that growth hormone (GH) expression is not limited to the pituitary, as it can be produced in many other tissues. It is known that growth hormone (GH) plays a role in the control of reproductive tract development. Acting as an endocrine, paracrine and/or autocrine regulator, GH influences pro...

journal_title：General and comparative endocrinology

authors： Luna M,Martínez-Moreno CG,Ahumada-Solórzano MS,Harvey S,Carranza M,Arámburo C

更新日期：2014-07-01 00:00:00

abstract：:The importance of late winter pairing activity on the neuroendocrinology of wild waterfowl is unknown. In this study, we examined the sex-related differences in the roles of late winter pairing activity and seasonal influences on neuroendocrine and reproductive physiology in both male and female mallards. Our main goa...

journal_title：General and comparative endocrinology

authors： Bluhm CK,Rozenboim I,Silsby J,El Halawani M

更新日期：2000-05-01 00:00:00

abstract：:In order to elucidate details on the development of the circadian clock, the effects of light on the in vitro melatonin (MT) release and the presence of mRNAs of several clock genes in the embryonic chicken pineal gland were investigated. Chicken embryos of various developmental stages were exposed to stimuli of light...

journal_title：General and comparative endocrinology

authors： Csernus VJ,Nagy AD,Faluhelyi N

更新日期：2007-06-01 00:00:00

abstract：:Our previous research on range-expanding house sparrows in Kenya revealed that (i) range-edge birds released more corticosterone (CORT) in response to a stressor than range-core birds, ii) that range-edge birds were more exploratory than range-core birds, and that (iii) all birds exhibited extensive variation in genom...

journal_title：General and comparative endocrinology

authors： Kilvitis HJ,Ardia DR,Thiam M,Martin LB

更新日期：2018-12-01 00:00:00

abstract：:Maintenance of cellular homeostasis influences ageing and it is determined by several factors, including efficient proteolysis of damaged proteins. The ubiquitin-proteasome system is the major protein degradation pathway in the cell. Specifically, the proteasome is responsible for clearance of abnormal, denatured or i...

journal_title：General and comparative endocrinology

authors： Löw P

更新日期：2011-05-15 00:00:00

abstract：:The presence of multiple forms of gonadotropin-releasing hormone (GnRH) within a single brain is common among vertebrate species. In previous studies of reptiles, two forms of GnRH were isolated from the brain of alligators and the primary structure was determined to be that of chicken (c)GnRH-I and cGnRH-II. GnRH has...

journal_title：General and comparative endocrinology

authors： Lescheid DW,Rosen GJ,Bridge AE,Jones RE,Warby CM,Sherwood NM

更新日期：1997-11-01 00:00:00

abstract：:Glucose-induced insulin secretion from pancreatic beta-cells involves metabolism-induced membrane depolarization and voltage-dependent Ca(2+) influx. The electrical events in beta-cell glucose sensing have been studied intensely using mouse islets of Langerhans, but data from other species, including models of type 2 ...

journal_title：General and comparative endocrinology

authors： Zimliki CL,Chenault VM,Mears D

更新日期：2009-04-01 00:00:00

abstract：:In a series of experiments, the effect of cortisol on the ability of rainbow trout (Salmo gairdneri) ovarian follicles to secrete sex steroids in vitro was investigated. The basal rate of secretion of sex steroids (oestradiol and testosterone) was suppressed in a dose-dependent manner by the addition of cortisol to th...

journal_title：General and comparative endocrinology

authors： Carragher JF,Sumpter JP

更新日期：1990-03-01 00:00:00

abstract：:Gonadotropin-releasing hormones (GnRH) constitute a family of neuropeptides which are important regulators of reproduction in vertebrates. The effect of mammalian GnRH (mGnRH), salmon GnRH, chicken GnRH-I, chicken GnRH-II, and lamprey GnRH-I on [3H]thymidine incorporation into DNA of dissociated gonadal cells of marin...

journal_title：General and comparative endocrinology

authors： Pazos AJ,Mathieu M

更新日期：1999-01-01 00:00:00

abstract：:The activities of oxidative enzymes of hepatic mitochondria of Anabas testudineus increased following exogenous administration of hydrocortisone and corticosterone. The inhibitors of protein synthesis prevented the hormone-mediated increase of hepatic enzymes, suggesting that corticosteroids regulate the oxidative met...

journal_title：General and comparative endocrinology

authors： Ignatius J,Oommen OV

更新日期：1990-05-01 00:00:00