Molecular cloning, characterization and expression profiles of multiple leptin genes and a leptin receptor gene in orange-spotted grouper (Epinephelus coioides).

abstract：:This paper presents a first-time report on the localization, structure and seasonal secretory activity of the Y-organ of a grapsid brachyuran crab (Metopograpsus messor). Having exhibited discrete seasonality with reference to the programming of molt and reproduction, this brachyuran crab has offered us an excellent m...

journal_title：General and comparative endocrinology

authors： Shyamal S,Sudha K,Gayathri N,Anilkumar G

更新日期：2014-01-15 00:00:00

abstract：:The optic tectum rapidly inhibits food intake when a visual threat is present. Anatomical and electrophysiological evidence support a role for neuropeptide Y (NPY), originating from cells in the thalamus, in the tectal inhibition of prey capture. Here we test the hypothesis that tectal NPY receptor type 2 (NPY2R) infl...

journal_title：General and comparative endocrinology

authors： Islam R,Prater CM,Harris BN,Carr JA

更新日期：2019-10-01 00:00:00

abstract：:A radioimmunoassay (RIA) was developed to measure cortisone in Atlantic salmon plasma. Diatomaceous earth microcolumn chromatography was used to separate the cortisone from other steroids. The RIA method following chromatography was validated by analyzing each of six samples of blood by double isotope derivative assay...

journal_title：General and comparative endocrinology

authors： Weisbart M,McGowan LK

更新日期：1984-09-01 00:00:00

abstract：:The effect of a gonadotropin-releasing hormone analog (GnRHA, HOE766) was studied in hypophysectomized elasmobranch fish Torpedo marmorata and T. ocellata. In addition, estradiol (E2) effects were studied in intact and hypophysectomized (HPX) animals. Plasma androgen concentrations were measured 2 or 6 hr after GnRHA ...

journal_title：General and comparative endocrinology

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

更新日期：1989-09-01 00:00:00

abstract：:Immunohistochemical methods using affinity adsorbed antibodies raised against the three families of calcitonins (CT) were applied to ultimobranchial (UB) cells in situ to investigate the nature of the Chelonian calcitonin molecule and its distribution in the ultimobranchial bodies of the freshwater turtle, Pseudemys s...

journal_title：General and comparative endocrinology

authors： Boudbid H,Leger AF,Pidoux E,Volle GE,Taboulet J,Moukhtar MS,Treilhou-Lahille F

更新日期：1987-03-01 00:00:00

abstract：:Laboratory populations of the prairie deermouse (Peromyscus maniculatus) reach a growth asymptote due primarily to the failure of more than 90% of the young born into the population to mature sexually. This inhibition is reversible; when young are removed from the inhibiting influence of the population more than 75% w...

journal_title：General and comparative endocrinology

authors： Cherry BA,Cadigan B,Mansourian N,Nelson C,Bradley EL

更新日期：2002-11-01 00:00:00

abstract：:The steroid hormone 5α-dihydrotestosterone (DHT) is one of the most physiologically important androgens in male vertebrates, with the exception of teleost fish, in which it is generally assumed that DHT does not play any major physiological role. However, this assumption is challenged by the fact that all the componen...

journal_title：General and comparative endocrinology

authors： Margiotta-Casaluci L,Courant F,Antignac JP,Le Bizec B,Sumpter JP

更新日期：2013-09-15 00:00:00

abstract：:Xenopus laevis postvitellogenic ovarian follicles release into conditioned medium nonsteroidal factor(s) that potentiate progesterone-induced oocyte maturation. The molecular weight of this factor is between 1000 and 10,000 Da. The potentiating activity is suppressed when follicles are incubated with cyanoketone to in...

journal_title：General and comparative endocrinology

authors： Chesnel F,Bourry A,Boujard D,Joly J

更新日期：1992-05-01 00:00:00

abstract：:The somatotropic axis, or growth hormone-insulin-like growth factor-1 (GH-IGF-1) axis, of fish is involved in numerous physiological process including regulation of ionic and osmotic balance, lipid, carbohydrate and protein metabolism, growth, reproduction, immune function and behavior. It is thought that GH plays a r...

journal_title：General and comparative endocrinology

authors： Besseau L,Fuentès M,Sauzet S,Beauchaud M,Chatain B,Covès D,Boeuf G,Falcón J

更新日期：2013-12-01 00:00:00

abstract：:This review focuses on the endocrine regulation of reproductive behavior in moth species with particular emphasis on Helicoverpa spp. Reproductive behavior in most adult moths is dependent on the release of a unique blend of sex pheromones by the females to attract conspecific males. Mating, on the other hand, results...

journal_title：General and comparative endocrinology

authors： Rafaeli A

更新日期：2009-05-15 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：:In addition to the previously recognised thyroid hormone-binding proteins, three plasma components possibly involved in T3 and T4 transport have been identified in chicken plasma using gel filtration at pH 7.4. In mature female, though not male and immature female birds, a significant amount of T3 (11%) is bound to ve...

journal_title：General and comparative endocrinology

authors： Mitchell MA,Stiles MS

更新日期：1985-02-01 00:00:00

abstract：:Baseline and stress-responsive glucocorticoid (GC) levels were characterized during the active period in free-ranging male and reproductive female little brown myotis (Myotis lucifugus). Bats were trapped and blood was sampled within 3 min of capture at two maternity sites during the summer and at one swarming site pr...

journal_title：General and comparative endocrinology

authors： Reeder DM,Kosteczko NS,Kunz TH,Widmaier EP

更新日期：2004-04-01 00:00:00

abstract：:Birds respond to environmental changes by modulating their levels of plasma corticosterone, a stress hormone produced by the adrenal glands. Baseline levels of corticosterone and the magnitude of adrenocortical response to acute stress are known to vary seasonally. Photoperiod is one of several potential factors which...

journal_title：General and comparative endocrinology

authors： Pravosudov VV,Kitaysky AS,Saldanha CJ,Wingfield JC,Clayton NS

更新日期：2002-04-01 00:00:00

abstract：:Testicular maturation of underyearling precocious male masu salmon (Oncorhynchus masou) is affected by photoperiod. It is accelerated by a short photoperiod (light-dark cycles of 8:16 h; LD 8:16) and delayed by a long photoperiod (LD 16:8). Circulating melatonin levels are high during the night and low during the day:...

journal_title：General and comparative endocrinology

authors： Amano M,Iigo M,Ikuta K,Kitamura S,Yamada H,Yamamori K

更新日期：2000-11-01 00:00:00

abstract：:In songbirds, neurons that regulate learned song behavior undergo extensive seasonal plasticity in their number and size in relation to the bird's reproductive status. Seasonal plasticity of these brain regions is primarily regulated by changes in circulating concentrations of testosterone. Androgen receptors are pres...

journal_title：General and comparative endocrinology

authors： Fraley GS,Steiner RA,Lent KL,Brenowitz EA

更新日期：2010-03-01 00:00:00

abstract：:The recent purification of two gonadotropins, GTH I and GTH II, in teleost fish and the development of their specific radioimmunoassays using antibodies directed against their beta subunits have demonstrated that earlier assays for GTH II also measured GTH I. Most of the results on the gonadotropic control of reproduc...

journal_title：General and comparative endocrinology

authors： Breton B,Govoroun M,Mikolajczyk T

更新日期：1998-07-01 00:00:00

abstract：:The golden rabbitfish Siganus guttatus is a reef fish with a restricted lunar-synchronized spawning rhythmicity and releases gametes simultaneously around the first quarter moon period during the spawning season. In order to understand the molecular aspects of the "circa" rhythms in this species, the full-length melat...

journal_title：General and comparative endocrinology

authors： Park YJ,Park JG,Hiyakawa N,Lee YD,Kim SJ,Takemura A

更新日期：2007-01-15 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：:Thyroid-dependent stomach development occurs between approximately 35 and 50 days post-hatch (dph) in laboratory-reared summer flounder larvae. The process can be blocked by thiourea (TU), and TU effects are reversed by exogenous thyroxine (T4). To establish whether a window of sensitivity exists for T4-dependent gast...

journal_title：General and comparative endocrinology

authors： Soffientino B,Specker JL

更新日期：2003-12-01 00:00:00

abstract：:In female Paratelphusa, there appear to be two alternating dominant physiological tendencies, one biased in favor of reproductive (ovarian) growth and another biased in favor of somatic (regenerative) growth. Multiple limb autotomy (MA), long known to stimulate somatic growth, did so only if the crab was physiological...

journal_title：General and comparative endocrinology

authors： Kurup KN,Adiyodi RG

更新日期：1984-12-01 00:00:00

abstract：:Many vertebrates have more than one molecular form of gonadotropin-releasing hormone (GnRH) present in brain. In all cases documented to date, GnRH neurons located in the forebrain are critical players in the brain-pituitary-gonadal feedback axis although the details of how steroids regulate GnRH remain elusive. The f...

journal_title：General and comparative endocrinology

authors： Rissman EF,Li X

更新日期：1998-12-01 00:00:00

abstract：:In vertebrates, the ontogeny of several crucial organismal systems is known to occur early in life. Developmental conditions can ultimately have important consequences on adult fitness by affecting individual phenotype. These developmental effects are thought to be primarily mediated by endocrine systems, and especial...

journal_title：General and comparative endocrinology

authors： Dupont SM,Grace JK,Brischoux F,Angelier F

更新日期：2019-05-15 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：:The asymmetrical endostyle of Branchiostoma larvae contains two different zones of mucus-producing cells which metamorphose to the paired zones 2 and 4 respectively in the endostyle of the adult. In both the larva and the adult these zones are parts of the food-trapping mechanism. An endostyle zone, which has a positi...

journal_title：General and comparative endocrinology

authors： Fredriksson G,Ericson LE,Olsson R

更新日期：1984-11-01 00:00:00

abstract：:Quantification of glucocorticoid metabolites in feces has been shown to be a powerful tool in evaluating well-being in vertebrates. Little is known however about the hypothalamic-pituitary-adrenal axis response to stressors, and consequent glucocorticoid excretion, in reptiles. In a longitudinal study, fecal corticost...

journal_title：General and comparative endocrinology

authors： Kalliokoski O,Timm JA,Ibsen IB,Hau J,Frederiksen AM,Bertelsen MF

更新日期：2012-05-15 00:00:00

abstract：:We studied effects of in vitro conditions on the steady-state distribution and exchange of thyroid hormones (TH) between red blood cells (RBC) and plasma of rainbow trout. At steady state at 12 degrees C the RBC contained 5-11% of L-thyroxine (T4), 14-23% of 3,5,3'-triiodo-L-thyronine (T3), and 23-24% of 3,3',5'-triio...

journal_title：General and comparative endocrinology

authors： McLeese J,Waytiuk A,Eales JG

更新日期：1998-02-01 00:00:00

abstract：:Effects of growth hormone (GH) on the synthesis of mucopolysaccharide by ceratobranchial cartilages of the Japanese eel, Anguilla japonica, were examined by monitoring the in vitro uptake of [35S]sulfate. The [35S]sulfate uptake decreased rapidly to one-third of the initial level during the first 3 days after hypophys...

journal_title：General and comparative endocrinology

authors： Duan CM,Inui Y

更新日期：1990-08-01 00:00:00

abstract：:Living for extended periods in Antarctica exposes base personnel to extremes of daylength (photoperiod) and temperature. At the British Antarctic Survey base of Halley, 75°S, the sun does not rise for 110 d in the winter and does not set for 100 d in summer. Photoperiod is the major time cue governing the timing of se...

journal_title：General and comparative endocrinology

authors： Arendt J,Middleton B

更新日期：2018-03-01 00:00:00

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