abstract：:Relaxin 3 (RLN3) is a newly-discovered member of the insulin superfamily. We isolated three RLN3-like cDNAs from the brain of the Japanese eel (Anguilla japonica). The deduced amino acid sequences of the RLN3-like cDNAs contained the two-chain structure common to relaxin including a RXXXRXXI/V motif in the B-chain. Ph...

journal_title：General and comparative endocrinology

authors： Hu GB,Kusakabe M,Takei Y

更新日期：2011-07-01 00:00:00

abstract：:Primary cultured gill epithelia from goldfish and rainbow trout were used to investigate a role for cortisol in the regulation of paracellular permeability and tight junction (TJ) protein transcript abundance in representative stenohaline versus euryhaline freshwater (FW) fish gills. Glucocorticoid and mineralocortico...

journal_title：General and comparative endocrinology

authors： Chasiotis H,Kelly SP

更新日期：2011-07-01 00:00:00

abstract：:Thyroxine (T(4)) and triiodothyronine (T(3)), the principal thyroid hormones (THs) secreted from the hypothalamic-pituitary-thyroid (HPT) axis, produce a plethora of physiologic actions in fish. The diverse actions of THs in fishes are primarily due to the sensitivity of thyroid axis to many physical, chemical and bio...

journal_title：General and comparative endocrinology

authors： Peter MC

更新日期：2011-06-01 00:00:00

abstract：:During an eight month study of the reproductive cycle in two age groups, and in both sexes, of tench (Tinca tinca L.), it was found that plasma concentrations of the presumptive 'maturation inducing hormone (MIH)' 17,20β-dihydroxypregn-4-en-3-one (17,20β-P) did not reach a peak during the spawning season, but as much ...

journal_title：General and comparative endocrinology

authors： Antonopoulou E,Tsikliras AC,Kocour M,Zlábek V,Flajšhans M,Gela D,Piačková V,Scott AP

更新日期：2011-06-01 00:00:00

abstract：:Potamopyrgus antipodarum is a promising test organism that is often used in ecotoxicology, both in laboratory and field exposures. As no data are available on the physiological variation range of its life-traits and the biomarkers it uses, we studied the variation of fecundity, steroid levels and energy reserves over ...

journal_title：General and comparative endocrinology

authors： Gust M,Mouthon J,Queau H,Dussart C,Buronfosse T,Garric J

更新日期：2011-06-01 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：:In insects, especially phytophagous insects, feeding behavior occurs at a regular frequency. Although a number of physiological studies have revealed various causal factors leading to feeding behavior in insects, little has been demonstrated regarding the regulatory mechanisms underlying insect feeding behavior. To co...

journal_title：General and comparative endocrinology

authors： Nagata S,Morooka N,Matsumoto S,Kawai T,Nagasawa H

更新日期：2011-05-15 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：:Prolonged or frequent secretion of adrenal glucocorticoids in response to aversive stimuli can negatively impact reproduction. Because female southern white rhinoceros (Ceratotherium simum simum) reproduce poorly in captivity, we compared fecal corticosterone metabolite concentrations among parous, nulliparous, and ad...

journal_title：General and comparative endocrinology

authors： Metrione LC,Harder JD

更新日期：2011-05-01 00:00:00

abstract：:Following feeding of a single meal to Atlantic salmon, the temporal changes in the brain mRNA expression of neuropeptide y (npy), cocaine-amphetamine regulated transcript (cart), peptide yy (pyy), two isoforms of agouti-related protein (agrp), two isoforms of cholecystokinin (cck), and four isoforms of proopiomelanoco...

journal_title：General and comparative endocrinology

authors： Valen R,Jordal AE,Murashita K,Rønnestad I

更新日期：2011-05-01 00:00:00

abstract：:Feather coloration in chickens mainly depends on melanin produced by melanocytes located in the feather follicles. The melanocortin 1 receptor (MC1R) on follicular melanocytes regulates melanin synthesis; however, the source of the melanocortins that interact with the receptors remains unclear. In this study, we exami...

journal_title：General and comparative endocrinology

authors： Yoshihara C,Tashiro Y,Taniuchi S,Katayama H,Takahashi S,Takeuchi S

更新日期：2011-03-01 00:00:00

abstract：:PACAP (pituitary adenylate cyclase activating polypeptide) is widely distributed neuropeptide acting via three subtypes of receptors, PAC(1), VPAC(1) and VPAC(2). Here we examined the localisation and nature of PACAP-immunoreactive nerves in the rat thyroid and parathyroid glands and defined the distribution of PAC(1)...

journal_title：General and comparative endocrinology

authors： Fahrenkrug J,Hannibal J

更新日期：2011-03-01 00:00:00

abstract：:Gonadotropin-releasing hormone (GnRH) plays a central role in vertebrate reproduction. The evolutionary origin of this neuropeptide and its receptor is not obvious, but the advent of genomics makes it possible to examine the roots of GnRH and delve deeper into its ancestral relationships. New peptide sequences identif...

journal_title：General and comparative endocrinology

authors： Roch GJ,Busby ER,Sherwood NM

更新日期：2011-03-01 00:00:00

abstract：:To maximize fitness, females should invest optimally in the siblings within a litter or brood and adapt this investment to environmental conditions. Chick mass and yolk androgens have been shown to influence the outcome of sibling competition. In birds, asynchronous hatching plays a major role in this process and ofte...

journal_title：General and comparative endocrinology

authors： Poisbleau M,Demongin L,Chastel O,Eens M,Quillfeldt P

更新日期：2011-02-01 00:00:00

abstract：:The existence of direct progestin actions on teleost sperm to stimulate hypermotility is not widely acknowledged because it has only been demonstrated in members of the family Sciaenidae. In the present study, progestin stimulation of sperm hypermotility was investigated in a non-sciaenid, southern flounder, and the p...

journal_title：General and comparative endocrinology

authors： Tubbs C,Tan W,Shi B,Thomas P

更新日期：2011-02-01 00:00:00

abstract：:The neuropeptide gonadotropin-releasing hormone (GnRH) plays an important role in the control of reproductive functions. Vertebrates possess multiple GnRH isoforms that are classified into three main groups, namely GnRH1, GnRH2 and GnRH3. In the present study, we show that the chromosomal organization of the three GnR...

journal_title：General and comparative endocrinology

authors： Tostivint H

更新日期：2011-02-01 00:00:00

abstract：:Using genetic monosex male and female rainbow trout populations, the potential sex differences in the central expression of estrogen receptors (esr1, esr2a, esr2b), brain aromatase (cyp19a1b) and some other steroidogenic enzymes was studied over the period of sex differentiation (from 35 to 63 dpf: days post-fertiliza...

journal_title：General and comparative endocrinology

authors： Vizziano-Cantonnet D,Anglade I,Pellegrini E,Gueguen MM,Fostier A,Guiguen Y,Kah O

更新日期：2011-01-15 00:00:00

abstract：:Galanin is a multi-functional neuropeptide that is widely distributed in the mammalian central nervous system and peripheral tissues. It exerts multiple physiological functions through interaction with 3 known G protein-coupled receptors (GPCR), namely, galanin type I, II and III (GalR1, 2 and 3) receptors, which have...

journal_title：General and comparative endocrinology

authors： Ho JC,Kwok AH,Zhao D,Wang Y,Leung FC

更新日期：2011-01-15 00:00:00

abstract：:This study compares follicular function and ovulatory efficiency in 20 sows with obesity/leptin resistance genotype (Iberian pig) and 20 females of lean commercial crosses (Large White × Landrace; LW×L). Estrous cycle was synchronized with progestagens; ovulation was induced with eCG and hCG, in half of the females of...

journal_title：General and comparative endocrinology

authors： Gonzalez-Añover P,Encinas T,Sanz E,Letelier CA,Torres-Rovira L,de Mercado E,Pallares P,Sanchez-Sanchez R,Gonzalez-Bulnes A

更新日期：2011-01-01 00:00:00

abstract：:The oocytes of the freshwater catfish Heteropneustes fossilis hydrate during hormone-induced meiotic maturation. To investigate if this process may be mediated by aquaporins (AQPs), as it occurs in marine fish producing highly hydrated eggs, the cloning of ovarian AQPs in catfish was carried out. Using degenerate prim...

journal_title：General and comparative endocrinology

authors： Chaube R,Chauvigné F,Tingaud-Sequeira A,Joy KP,Acharjee A,Singh V,Cerdà J

更新日期：2011-01-01 00:00:00

abstract：:Insulin (INS) plays a critical role in the growth, development, and metabolism of vertebrates. In this study, a cDNA encoding a novel insulin receptor (IR) subtype was isolated, cloned, and sequenced from the liver of rainbow trout. A 1525-bp cDNA encoding a partial amino acid sequence of the β-subunit including the t...

journal_title：General and comparative endocrinology

authors： Caruso MA,Blaufuss PC,Kittilson JD,Raine J,Sheridan MA

更新日期：2010-12-01 00:00:00

abstract：:Aromatase is the key enzyme for estrogen biosynthesis and is encoded by Cyp19 gene. Placental cotyledons are the main site of Cyp19 gene expression during pregnancy. The present study was aimed to investigate if DNA methylation and thus epigenetic mechanisms play a potential role in stage-specific regulation of Cyp19 ...

journal_title：General and comparative endocrinology

authors： Ghai S,Monga R,Mohanty TK,Chauhan MS,Singh D

更新日期：2010-11-01 00:00:00

abstract：:Pituitary melanotrope cells of the amphibian Xenopus laevis are neuroendocrine cells regulating the animal's skin color adaptation through secretion of α-melanophore-stimulating hormone (α-MSH). To fulfill this function optimally, the melanotrope cell undergoes plastic changes in structure and secretory activity in re...

journal_title：General and comparative endocrinology

authors： Kuribara M,Eijsink VD,Roubos EW,Jenks BG,Scheenen WJ

更新日期：2010-11-01 00:00:00

abstract：:Leach's storm-petrels accumulate large amounts of body mass throughout the nestling period. Approximately 4days before fledging, nestlings weigh 50-100% more than adults. In order to shed this excess mass, nestlings engage in behavioral anorexia, and leave the burrow when they are light enough to fly. During this pref...

journal_title：General and comparative endocrinology

authors： Kozlowski CP,Mauck RA,O'Reilly KM,Philipsborn J,Ricklefs RE

更新日期：2010-10-01 00:00:00

abstract：:We used a free-ranging, seasonally breeding adult male songbird, the rufous-winged sparrow, Aimophila carpalis, to investigate the effects of acute stress-induced by capture followed by restraint, on the hypothalamo-pituitary-testicular axis. Intra- and interindividual comparisons revealed that males decreased their p...

journal_title：General and comparative endocrinology

authors： Deviche PJ,Hurley LL,Fokidis HB,Lerbour B,Silverin B,Silverin B,Sabo J,Sharp PJ

更新日期：2010-10-01 00:00:00

abstract：:Oxidative stress impaired sperm function might lead to infertility. The objective of this study was to evaluate the effects of altered thyroid hormone levels on regulation of mitochondrial glutathione redox status and its dependent antioxidant defense system in adult rat testis and their correlation with testicular fu...

journal_title：General and comparative endocrinology

authors： Chattopadhyay S,Choudhury S,Roy A,Chainy GB,Samanta L

更新日期：2010-10-01 00:00:00

abstract：:Adiponectin is a novel adipocyte-derived hormone with low circulating concentrations and/or mRNA expression in obesity and non-alcoholic fatty liver disease (NAFLD). The adiponectin mRNA of several Carnivora species was sequenced to enable further gene expression studies in this clade with potential experimental speci...

journal_title：General and comparative endocrinology

authors： Nieminen P,Rouvinen-Watt K,Kapiainen S,Harris L,Mustonen AM

更新日期：2010-09-15 00:00:00

abstract：:Comparative hormone studies can reveal how physiology underlies life history variation. Here, we examined seasonal variation in plasma testosterone concentration between populations of male orange-crowned warblers (Vermivora celata) breeding in Fairbanks, Alaska (V. c. celata) and on Santa Catalina Island, California ...

journal_title：General and comparative endocrinology

authors： Horton BM,Yoon J,Ghalambor CK,Moore IT,Scott Sillett T

更新日期：2010-09-15 00:00:00

abstract：:The developmental hypothesis proposes that the adrenocortical response to stress during postnatal development in birds should not develop when the benefits of elevated corticosterone do not outweigh the deleterious effects on growth and development. We tested three predictions developed from this hypothesis in free-li...

journal_title：General and comparative endocrinology

authors： Müller C,Jenni-Eiermann S,Jenni L

更新日期：2010-09-15 00:00:00

abstract：:The melanotrope cell in the amphibian pituitary pars intermedia is a model to study fundamental aspects of neuroendocrine integration. They release alpha-melanophore-stimulating hormone (alphaMSH), under the control of a large number of neurochemical signals derived from various brain centers. In Xenopus laevis, most ...

journal_title：General and comparative endocrinology

authors： van Wijk DC,Meijer KH,Roubos EW

更新日期：2010-09-01 00:00:00

abstract：:The rate-limiting and regulated step in steroidogenesis, the conversion of cholesterol to pregnenolone, is facilitated by the steroidogenic acute regulatory protein (StAR) and cytochrome P450 cholesterol side-chain cleavage (P450scc). We have isolated cDNAs encoding StAR and P450scc from the Atlantic stingray, Dasyati...

journal_title：General and comparative endocrinology

authors： Evans AN,Nunez BS

更新日期：2010-08-01 00:00:00

abstract：:While the role of corticosterone in mediating the response of birds to acute stress is well established, it has recently been proposed that a decrease in prolactin levels following stress may complement corticosterone in redirecting resources away from breeding activities and towards behaviors promoting immediate surv...

journal_title：General and comparative endocrinology

authors： Riou S,Chastel O,Lacroix A,Hamer KC

更新日期：2010-08-01 00:00:00

abstract：:Leptin, a 16-kDa hormone produced by mature adipocytes, has been shown to regulate the hibernation of mammals. In this study, the leptin gene sequences of both hibernating (Rhinolophus ferrumequinum) and non-hibernating (Rousettus leschenaultii) bats were determined, and the leptin proteins from these two different sp...

journal_title：General and comparative endocrinology

authors： He L,Pan Y,He G,Lin B,Liao CC,Zuo X,Yuan L

更新日期：2010-08-01 00:00:00

abstract：:Optimization of food consumption and ultimately growth are major concerns for aquaculture. In fish, food intake is regulated by several hormones produced by both brain and peripheral tissues. Changes in feeding behavior and appetite usually occur through the modulation of the gene expression and/or action of these app...

journal_title：General and comparative endocrinology

authors： Volkoff H,Hoskins LJ,Tuziak SM

更新日期：2010-07-01 00:00:00

abstract：:Selected physiological parameters were monitored over a 4-year period in the Barrow Island euro, Macropus robustus isabellinus, in Western Australia in a study of this species' homeostatic capabilities in an extremely arid habitat where individuals are exposed to high environmental temperatures and a lack of free wate...

journal_title：General and comparative endocrinology

authors： King JM,Bradshaw SD

更新日期：2010-05-15 00:00:00

abstract：:The Lottia gigantea genome was prospected for the presence of genes coding neuropeptides and neurohormones. Four genes code insulin-related peptides: two genes code molluscan insulin-like growth hormones, one gene an insulin very similar to vertebrate insulin, and the fourth a peptide related to drosophila insulin-lik...

journal_title：General and comparative endocrinology

authors： Veenstra JA

更新日期：2010-05-15 00:00:00

abstract：:The effects of prolonged nutrient restriction (fasting) and subsequent restoration (re-feeding) on the growth hormone (GH)/insulin-like growth factor (IGF) axis were investigated in the tilapia (Oreochromis mossambicus). Mean weight and specific growth rate declined within 1 week in fasted fish, and remained lower tha...

journal_title：General and comparative endocrinology

authors： Fox BK,Breves JP,Davis LK,Pierce AL,Hirano T,Grau EG

更新日期：2010-05-01 00:00:00

abstract：:We describe the reproductive cycle of Northern Pacific rattlesnakes (Crotalus oreganus) by quantifying steroid hormone concentrations and observing reproductive behaviors in free-ranging individuals. Additionally, we examined reproductive tissues from museum specimens. Plasma steroid hormone concentrations were quanti...

journal_title：General and comparative endocrinology

authors： Lind CM,Husak JF,Eikenaar C,Moore IT,Taylor EN

更新日期：2010-05-01 00:00:00

abstract：:Kisspeptin is a potent regulator of the hypothalamo-pituitary-gonadal axis. The activation of several vernal and pubertal behaviors involves the action of locally synthesized estradiol by hypothalamic aromatase-expressing neurons. Little is known about kisspeptin in non-mammalian systems, and its interaction with arom...

journal_title：General and comparative endocrinology

authors： Saldanha CJ,Walters BJ,Fraley GS

更新日期：2010-05-01 00:00:00

abstract：:This study characterizes the seasonal reproductive cycle of female round stingrays (Urobatis halleri) in an open coastal site at Seal Beach, CA and a protected estuary at the Seal Beach National Wildlife Refuge (SBNWR). Female round stingrays were sampled from August 2004 to July 2006, and assessed for reproductive pa...

journal_title：General and comparative endocrinology

authors： Mull CG,Lowe CG,Young KA

更新日期：2010-04-01 00:00:00