Modulation of the prolactin response to thyrotropin releasing hormone by ovarian steroids in ovariectomized turkeys (Meleagris gallopavo).

abstract：:The role of stress in the decline of Steller sea lions has become of interest in the identification of factors leading to their drastic decline and subsequent failure to recover. Serum cortisol was validated as a potential indicator of stress in three sub-populations inhabiting the majority of the Steller sea lions ra...

journal_title：General and comparative endocrinology

authors： Myers MJ,Litz B,Atkinson S

更新日期：2010-01-01 00:00:00

abstract：:The possible physiological role of a putative testicular gonadotropin-releasing hormone (GnRH)-like material was studied in the frog, Rana esculenta. We have investigated (a) changes of mitotic index (MI) of primary spermatogonia (SPG) in GnRH agonist (GnRH-Ag)-treated testes in vitro; (b) changes of androgen concentr...

journal_title：General and comparative endocrinology

authors： Di Matteo L,Minucci S,Fasano S,D'Antonio M,Pierantoni R,Chieffi G

更新日期：1990-07-01 00:00:00

abstract：:Prostaglandin F2 alpha (PGF2 alpha), progesterone, androgens (testosterone + dihydrotestosterone), and 17 beta-estradiol were measured in the plasma of male frogs, Rana esculenta, by radioimmunoassays. Plasma concentrations of PGF2 alpha were higher from October to December and peaked in March (prereproduction) and in...

journal_title：General and comparative endocrinology

authors： Gobbetti A,Zerani M,Bolelli GF,Botte V

更新日期：1991-06-01 00:00:00

abstract：:The doublesex and mab-3 related transcription factor (Dmrt) gene family is known to be related to the sexual regulators doublesex of arthropods and mab-3 of annelids and to hold highly conserved functions in sexual determination and differentiation across phyla. Here, we report a study of the Dmrt gene family in the f...

journal_title：General and comparative endocrinology

authors： Amterat Abu Abayed F,Manor R,Aflalo ED,Sagi A

更新日期：2019-10-01 00:00:00

abstract：:In the genetic sex determination of vertebrates, the gonadal sex depends on the combination of sex chromosomes that a zygote possesses. Despite the discovery of the sex-determining gene (SRY/Sry) in mammals in 1990s, the sex-determining gene in non-mammalian vertebrates remained an enigma for over a decade. In most ma...

journal_title：General and comparative endocrinology

authors： Matsuda M,Sakaizumi M

更新日期：2016-12-01 00:00:00

abstract：:Endocrinological research on wild animals inhabiting remote areas has been hampered by the need to store plasma samples at subzero temperatures. In an attempt to remedy this logistical issue, we here investigate the use of ethanol as an alternative to freezing for the preservation of steroid and indoleamine hormones i...

journal_title：General and comparative endocrinology

authors： Goymann W,Schwabl I,Trappschuh M,Hau M

更新日期：2007-01-15 00:00:00

abstract：:The effect of corticosteroid hormones in fish are mediated through intracellular receptors that act as ligand-binding transcription factors. Many studies have been devoted to cortisol binding using radiolabeled ligand in fish and allowed characterization of a single class of high affinity binding sites in various tiss...

journal_title：General and comparative endocrinology

authors： Prunet P,Sturm A,Milla S

更新日期：2006-05-15 00:00:00

abstract：:By mapping the distribution of cholecystokinin (CCK) receptor types onto an established phylogenetic hypothesis of vertebrate relationships, we tested two hypothesis about the evolution of CCK receptors: (1) A single CCK receptor type, CCK-X, is the ancestral receptor, while CCK-A and CCK-B receptors represent derived...

journal_title：General and comparative endocrinology

authors： Oliver AS,Vigna SR

更新日期：1996-04-01 00:00:00

abstract：:The public deposition of large transcriptome shotgun assembly (TSA) datasets for the Araneae (true spiders) provides a resource for determining the structures of the native neuropeptides present in members of this chelicerate order. Here, the Araneae TSA data were mined for putative peptide-encoding transcripts using ...

journal_title：General and comparative endocrinology

authors： Christie AE,Chi M

更新日期：2015-03-01 00:00:00

abstract：:Spexin (SPX), a novel peptide coevolved with the galanin/kisspeptin family, was first identified by bioinformatics prior to its protein purification/functional studies. Its mature peptide is highly conserved among different vertebrate classes. Based on the studies in mammals and fish models, SPX was found to be widely...

journal_title：General and comparative endocrinology

authors： Ma A,Bai J,He M,Wong AOL

更新日期：2018-09-01 00:00:00

abstract：:In fishes, maternal exposure to a stressor can influence offspring size and behavior. However, less is known about how maternal stress influences physiological processes in offspring, such as function of the hypothalamic-pituitary-interrenal (HPI) axis. We examined the impact of chronic maternal exposure to an acute c...

journal_title：General and comparative endocrinology

authors： Sopinka NM,Jeffrey JD,Burnett NJ,Patterson DA,Gilmour KM,Hinch SG

更新日期：2017-02-01 00:00:00

abstract：:Circadian rhythm is well known to play a pivotal role in reproduction but the presence of a gonadal circadian rhythm is opening a lot of questions about a local regulation of reproduction. In the present study, we first set to identify the key genes driving circadian rhythmicity from the gonadal transcriptome of the s...

journal_title：General and comparative endocrinology

authors： Basili D,Gioacchini G,Todisco V,Candelma M,Marisaldi L,Pappalardo L,Carnevali O

更新日期：2020-12-30 00:00:00

abstract：:Steelhead and hybrid trout (rainbow trout male, steelhead female) presmolts and smolts, Oncorhynchus mykiss, exposed to 30/1000 seawater (SW) for 24 hr manifested progressively lower plasma sodium values from December to May. The increase in plasma sodium after 24 hr in SW diminished significantly after March, with th...

journal_title：General and comparative endocrinology

authors： McLeese JM,Johnsson J,Huntley FM,Clarke WC,Weisbart M

更新日期：1994-01-01 00:00:00

abstract：:In mammals ghrelin has a diverse range of effects including stimulation of gut motility but although present in teleost fish its effects on motility have not been investigated. The present study used bioinformatics to search for fish paralogues of the ghrelin receptor and the closely related motilin receptor, and inve...

journal_title：General and comparative endocrinology

authors： Olsson C,Holbrook JD,Bompadre G,Jönsson E,Hoyle CH,Sanger GJ,Holmgren S,Andrews PL

更新日期：2008-01-01 00:00:00

abstract：:125I-labeled bovine and tilapia growth hormones were used to assess the presence of growth hormone receptors in membranes prepared from tissues of the tilapia Oreochromis mossambicus. The highest level of specific binding was detected in liver membranes from animals of both sexes and the binding was protein-dependent....

journal_title：General and comparative endocrinology

authors： Ng TB,Leung TC,Cheng CH,Woo NY

更新日期：1992-04-01 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：:Hyperglycemia that is caused by the release of crustacean hyperglycemic hormone (CHH) from the sinus gland to hemolymph is one of the hallmark physiological phenomena, occurring in decapod crustaceans experiencing stressful conditions. However, the mechanism(s) by which such elevated glucose levels return to resting l...

journal_title：General and comparative endocrinology

authors： Chung JS

更新日期：2014-04-01 00:00:00

abstract：:Melatonin is a much conserved feature in vertebrates that plays a central role in the entrainment of daily and annual physiological rhythms. Investigations aiming at understanding how melatonin mediates the effects of photoperiod on crucial functions and behaviors have been very active in the last decades, particularl...

journal_title：General and comparative endocrinology

authors： Falcón J,Migaud H,Muñoz-Cueto JA,Carrillo M

更新日期：2010-02-01 00:00:00

abstract：:In the summer of 1991 (late May to early September), I measured seasonal levels of plasma androgens in two species of plethodontid salamanders to assess the temporal relationship of elevated plasma androgen levels with spermatogenic events and with sexual behavior. In both species, spermatogenesis occurs in the spring...

journal_title：General and comparative endocrinology

authors： Woodley SK

更新日期：1994-11-01 00:00:00

abstract：:Male, dark-eyed juncos, Junco hyemalis, were held in captivity under conditions simulating winter temperature and photoperiod. Birds were administered corticosterone (B), metapyrone (MET), or control (empty) implants in silastic tubing. B implants resulted in higher plasma levels of B, especially on the first day foll...

journal_title：General and comparative endocrinology

authors： Gray JM,Yarian D,Ramenofsky M

更新日期：1990-09-01 00:00:00

abstract：:Melanophore-stimulating hormone (MSH) release from the pars intermedia of the pituitary gland is probably regulated by multiple factors of hypothalamic origin. We have examined a number of potential regulatory factors for their effects on MSH release from the amphibian Xenopus laevis. Serotonin and acetylcholine have ...

journal_title：General and comparative endocrinology

authors： Verburg-van Kemenade BM,Jenks BG,van Overbeeke AP

更新日期：1986-09-01 00:00:00

abstract：:Rainbow trout were confined for 48 hr, during which time water quality either was allowed to deteriorate (resulting in elevated NH3, elevated free CO2, and reduced dissolved O2) or was maintained at preconfinement levels. Fish were removed and blood samples taken at 0, 2, 4, 8, 24, and 48 hr after the onset of confine...

journal_title：General and comparative endocrinology

authors： Pottinger TG,Prunet P,Pickering AD

更新日期：1992-12-01 00:00:00

abstract：:We demonstrated the presence of specific binding sites for bullfrog luteinizing hormone (LH) and follicle-stimulating hormone (FSH) in a testicular crude plasma membrane fraction of the bullfrog, Rana catesbeiana. The equilibrium analysis of the binding showed that a straight line was fitted to the Scatchard plot of L...

journal_title：General and comparative endocrinology

authors： Takada K,Kubokawa K,Ishii S

更新日期：1986-02-01 00:00:00

abstract：:Methallibure treatment (1 mg fed on alternate days to a female and a male kept in 1 liter of 25% seawater) started from 1 or 7 days postpartum (early gestation) inhibited gestation in the wild guppy, Poecilia reticulata. A few of the fish treated from 7 days postpartum (2/9) did give birth, but the young either were d...

journal_title：General and comparative endocrinology

authors： Lam TJ,Pavri C,Ng KL

更新日期：1985-11-01 00:00:00

abstract：:The insulin-like growth factor-1 (IGF-1) plays an important role in the regulation of reproductive function. In the present study, we examined the effects of caloric restriction (CR) on the reproductive lifespan in rats and investigated the potential role of IGF-1. After 10 weeks of treatment, we determined the distri...

journal_title：General and comparative endocrinology

authors： Li L,Fu YC,Xu JJ,Chen XC,Lin XH,Luo LL

更新日期：2011-11-01 00:00:00

abstract：:Traditional views suggest that growth hormone and the growth hormone receptor (GH/GHR complex) exert their functions only on the plasma membrane. This paradigm, however, has been challenged by recent new findings that the GH/GHR complex could translocate into cell nuclei where they could still exhibit important physio...

journal_title：General and comparative endocrinology

authors： Hainan L,Huilin L,Khan MA,Xin Z,YuJiang Y,Hui Z,Naiquan Y

更新日期：2018-09-15 00:00:00

abstract：:The renal roles of physiologically relevant doses of angiotensin II (Ang II) and C-type natriuretic peptide (CNP) were investigated in the dogfish, Scyliorhinus canicula, using an in situ perfused trunk preparation. Perfusion with 10(-9) M Ang II resulted in a glomerular antidiuresis and decreases in perfusate flow ra...

journal_title：General and comparative endocrinology

authors： Wells A,Anderson WG,Cains JE,Cooper MW,Hazon N

更新日期：2006-01-15 00:00:00

abstract：:The cortisol stress response in juvenile coho salmon, Oncorhynchus kisutch, considered as the difference between resting and peak poststress cortisol levels, increased from 80 ng/ml in March to 166 ng/ml in July, the period when smoltification normally occurs. Resting plasma cortisol levels also continually increased ...

journal_title：General and comparative endocrinology

authors： Barton BA,Schreck CB,Ewing RD,Hemmingsen AR,Patiño R

更新日期：1985-09-01 00:00:00

abstract：:Insects are the most abundant animal group on Earth and have been the subject of genetic and physiological studies since the beginning of the 19th century. The public interest in understanding their biology increased as many insects have proven to exert a severe impact on human welfare and the environment. To trigger ...

journal_title：General and comparative endocrinology

authors： Reumer A,Van Loy T,Clynen E,Schoofs L

更新日期：2008-01-01 00:00:00

abstract：:The purpose of the present study was to determine if central administration of somatostatin influences feeding behavior in layer chicks. Five- to 7-day-old chicks that received intracerebroventricular (ICV) injections of 0.5 or 2 nmol somatostatin increased their food intake at 30 and 60 min after the injection, sugge...

journal_title：General and comparative endocrinology

authors： Tachibana T,Cline MA,Sugahara K,Ueda H,Hiramatsu K

更新日期：2009-05-01 00:00:00