abstract：:The endocannabinoid system is a major regulator of food intake in many animal species. Studies conducted so far have mostly focused on mammals, and, therefore, in this study, the role of the endocannabinoid system in food intake in the sea bream Sparus aurata was investigated. The effect of different doses of the endo...

journal_title：General and comparative endocrinology

authors： Piccinetti CC,Migliarini B,Petrosino S,Di Marzo V,Carnevali O

更新日期：2010-04-01 00:00:00

abstract：:Serotonin (5-HT) is well known for modulating the release of GnRH and gonadotropin in teleosts. Reports on increased female:male ratio after the blockade of 5-HT biosynthesis proposed a role for 5-HT in brain sex differentiation. Two types of tryptophan hydroxylase (Tph), rate-limiting enzyme in the biosynthesis of 5-...

journal_title：General and comparative endocrinology

authors： Sudhakumari CC,Senthilkumaran B,Raghuveer K,Wang DS,Kobayashi T,Kagawa H,Krishnaiah Ch,Dutta-Gupta A,Nagahama Y

更新日期：2010-04-01 00:00:00

abstract：:In hamsters, the Harderian glands (HGs) exhibit a marked sexual dimorphism which is thought to depend on dihydrotestosterone (DHT); however, it is unclear whether hamster HGs contain one or more 5 alpha-reductases and whether these enzymes are differentially expressed in males and females. In this study, we isolated s...

journal_title：General and comparative endocrinology

authors： Ramos L,Chávez B,Vilchis F

更新日期：2010-04-01 00:00:00

abstract：:Fetal development is a critical period of physical development, and factors in the intrauterine environment can cause lasting effects on the growth and development of offspring. There is little research evaluating organizational effects of early androgen exposure of endogenous maternal origins on the prenatal and post...

journal_title：General and comparative endocrinology

authors： Smith AS,Birnie AK,French JA

更新日期：2010-04-01 00:00:00

abstract：:Ghrelin is a recently discovered hormone which has profound effects on food intake and lipogenesis in mammals. In all mammals studied thus far, plasma ghrelin concentrations are increased before a meal and decrease immediately following a meal; ghrelin levels increase with fasting. The golden-mantled ground squirrel S...

journal_title：General and comparative endocrinology

authors： Healy JE,Ostrom CE,Wilkerson GK,Florant GL

更新日期：2010-04-01 00:00:00

abstract：:Ecdysis, or the shedding of the old cuticle, depends on coordinated stereotyped behaviors, regulated by a number of neuropeptides. In the hornworm, Manduca sexta, two neuropeptides interact, namely ecdysis-triggering hormone (ETH) and eclosion hormone. We looked at the effects of ETH in vivo and in vitro, on the brain...

journal_title：General and comparative endocrinology

authors： Asuncion-Uchi M,El Shawa H,Martin T,Fuse M

更新日期：2010-03-01 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：: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：:Fish egg quality can be defined as the ability of the egg to be fertilized and subsequently develop into a normal embryo. Similarly, sperm quality can be defined as its ability to successfully fertilize an egg and subsequently allow the development of a normal embryo. In the wild or under aquaculture conditions, the q...

journal_title：General and comparative endocrinology

authors： Bobe J,Labbé C

更新日期：2010-02-01 00:00:00

abstract：:Sexual behavior is one of the most profound events during the life cycle of animals that reproduce sexually. After completion of gonadal development that is mediated by various hormones, oviparous teleosts perform a suite of behaviors, often termed as spawning behavior. This is particularly important for teleosts that...

journal_title：General and comparative endocrinology

authors： Munakata A,Kobayashi M

更新日期：2010-02-01 00:00:00

abstract：:Numerous studies have shown that melatonin exerts some influence on the antioxidant defense system (ADS) in vertebrates, but for crustaceans no such effect has been demonstrated till now. However, earlier reports did show a similar profile of daily variations in the ADS of the gills and the melatonin content of the ey...

journal_title：General and comparative endocrinology

authors： Maciel FE,Ramos BP,Geihs MA,Vargas MA,Cruz BP,Meyer-Rochow VB,Vakkuri O,Allodi S,Monserrat JM,Nery LE

更新日期：2010-01-15 00:00:00

abstract：:A long-unresolved question in the developmental biology of Drosophila melanogaster has been whether methyl farnesoid hormones secreted by the ring gland are necessary for larval maturation and metamorphosis. In this study, we have used RNAi techniques to inhibit 3-Hydroxy-3-Methylglutaryl CoA Reductase (HMGCR) express...

journal_title：General and comparative endocrinology

authors： Jones D,Jones G,Teal P,Hammac C,Messmer L,Osborne K,Belgacem YH,Martin JR

更新日期：2010-01-15 00:00:00

abstract：:The aim of present study was to investigate the role of androgen in sperm storage in the female genital tract of Scotophilus heathi. Spermatozoa were observed in the distal part of oviduct and utero-tubal junction of all the female bats collected between January and early March. Increase in circulating testosterone le...

journal_title：General and comparative endocrinology

authors： Roy VK,Krishna A

更新日期：2010-01-01 00:00:00

abstract：:In vitro experiments were conducted to test the hypothesis that 17alpha,20beta-dihydroxy-4-prengnen-3-one (17,20-P) regulates cortisol metabolism in Pacific salmon. In both rainbow trout and coho salmon, cortisol metabolism was significantly higher in the kidney compared to the liver. The rainbow trout kidney converte...

journal_title：General and comparative endocrinology

authors： Barry TP,Marwah A,Nunez S

更新日期：2010-01-01 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

abstract：:The objectives of this study were to investigate the seasonal changes in pituitary gonadotropins, growth hormone (GH), and estrogen receptor (ER) isoform mRNA in wild female and male largemouth bass (LMB) (Micropterus salmoides) from an unpolluted habitat to better understand reproductive physiology in this ecological...

journal_title：General and comparative endocrinology

authors： Martyniuk CJ,Kroll KJ,Porak WF,Steward C,Grier HJ,Denslow ND

更新日期：2009-09-15 00:00:00

abstract：:The growth hormone (GH) gene has been characterized for a number of fishes and used to establish phylogenetic relationships and as a candidate gene for studies of genetic variation in connection with growth traits. In this study, we report the genomic structure of Nibea coibor GH (designated as ncGH) including its 5'-...

journal_title：General and comparative endocrinology

authors： Zhang D,Shao Y,Jiang S,Li J,Xu X

更新日期：2009-09-15 00:00:00

abstract：:Most seasonally reproducing vertebrates show pronounced changes in testosterone levels throughout the year. The Challenge Hypothesis [Wingfield, J.C., Hegner, R.E., Dufty, A.M., Ball, G. F., 1990. The "challenge hypothesis": theoretical implications for patterns of testosterone secretion, mating systems, and breeding ...

journal_title：General and comparative endocrinology

authors： Goymann W

更新日期：2009-09-01 00:00:00

abstract：:Thyroid stimulating hormone (TSH) is produced by the anterior pituitary and is used to regulate thyroid hormone output, which in turn controls metabolic activity. Currently, the pituitary is believed to be the only source of TSH used by the thyroid. Recent studies in mice from our laboratory have identified a TSHbeta ...

journal_title：General and comparative endocrinology

authors： Schaefer JS,Klein JR

更新日期：2009-07-01 00:00:00

abstract：:Key peptide hormones involved in the control of appetite in vertebrates were identified, their genes characterized and their regulation studied in Atlantic salmon: two agouti-related proteins (AgRP), cocaine- and amphetamine-regulated transcript (CART) and neuropeptide Y (NPY). The AgRP-1 and AgRP-2 genes encode prepr...

journal_title：General and comparative endocrinology

authors： Murashita K,Kurokawa T,Ebbesson LO,Stefansson SO,Rønnestad I

更新日期：2009-06-01 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：: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

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：:Avian circadian organization involves interactions between three neural pacemakers: the suprachiasmatic nuclei (SCN), pineal, and retina. Each of these structures is linked within a neuroendocrine loop to influence downstream processes and peripheral oscillations. However, the contribution of each structure to drive o...

journal_title：General and comparative endocrinology

authors： Karaganis SP,Bartell PA,Shende VR,Moore AF,Cassone VM

更新日期：2009-04-01 00:00:00

abstract：:Maternally derived yolk steroids have been found to elicit both short-term and long-term effects on offspring phenotype. Paradoxically, their effects can be strikingly specific given the often substantial concentrations present at oviposition, and they do not appear to uniformly affect all steroid-sensitive processes....

journal_title：General and comparative endocrinology

authors： Paitz RT,Bowden RM

更新日期：2009-04-01 00:00:00

abstract：:The avian neurohypophyseal hormone arginine vasotocin (AVT) is known to be involved in the regulation of adrenocorticotropin (ACTH) release by interacting with the VT2 receptor (VT2R), which is homologous to the mammalian vasopressin V1b receptor (V1bR). To study the role of glucocorticoid in the expression and regula...

journal_title：General and comparative endocrinology

authors： Sharma D,Cornett LE,Chaturvedi CM

更新日期：2009-04-01 00:00:00

abstract：:Full-length complementary deoxyribonucleic acid as well as genomic sequences encoding for two gastrointestinal appetite-related peptides, ghrelin and for gastrin-releasing peptide (GRP) were cloned from Atlantic cod (Gadus morhua) stomach using reverse transcription and rapid amplification of complementary deoxyribonu...

journal_title：General and comparative endocrinology

authors： Xu M,Volkoff H

更新日期：2009-02-01 00:00:00

abstract：:Myostatin is a TGF-beta family member that plays a key role in regulating skeletal muscle growth. Previous studies in mammals have demonstrated that myostatin is capable of binding the two activin type II receptors. Additionally, activin type II receptors have been shown to be capable of binding a number of other TGF-...

journal_title：General and comparative endocrinology

authors： Carpio Y,Acosta J,Morales R,Santisteban Y,Sanchéz A,Estrada MP

更新日期：2009-01-15 00:00:00

abstract：:Recently, zebrafish has quickly risen as a model species for functional analysis of the brain-pituitary-gonad axis. However, one of the hurdles for such work in this popular model organism is the small size of its pituitary gland, which makes it difficult to investigate the regulation of pituitary hormone expression a...

journal_title：General and comparative endocrinology

authors： Lin SW,Ge W

更新日期：2009-01-15 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：:Immunocytochemical distribution and dynamics of vasotocin (VT) were studied in the air-breathing catfish Heteropneustes fossilis in relation to the reproductive cycle. Vasotocin was localized in the brain and ovary by streptavidin-biotin immunocytochemistry. The immunoreactivity was found throughout the hypothalamo-hy...

journal_title：General and comparative endocrinology

authors： Singh V,Joy KP

更新日期：2008-11-01 00:00:00

abstract：:Three distinct thyroid hormone receptor (TR) cDNAs (gTRalphaA, gTRalphaB and gTRbeta) were cloned and sequenced in orange-spotted grouper (Epinephelus coioides). The cDNA of gTRalphaA consisted of 1555-bp and encoded a putative protein of 416 amino acids, while the cDNA of gTRalphaB consisted of 1459-bp and encoded 39...

journal_title：General and comparative endocrinology

authors： Tang X,Liu X,Zhang Y,Zhu P,Lin H

更新日期：2008-11-01 00:00:00

abstract：:In goldfish, two endogenous gonadotropin-releasing hormones (GnRH), salmon GnRH (sGnRH) and chicken GnRH-II (cGnRH-II), are thought to stimulate growth hormone (GH) release via protein kinase C (PKC) and subsequent increases in intracellular Ca(2+) levels ([Ca(2+)](i)). In contrast, the signaling mechanism for seroton...

journal_title：General and comparative endocrinology

authors： Yu Y,Wong AO,Chang JP

更新日期：2008-10-01 00:00:00

abstract：:Dopamine (DA) has a pivotal role in avian prolactin (PRL) secretion, acting centrally through D(1) DA receptors to stimulate PRL secretion by operating through vasoactive intestinal peptide (VIP). DA also inhibits PRL secretion by activating D(2) DA receptors at the pituitary level. This study was designed to investig...

journal_title：General and comparative endocrinology

authors： Sartsoongnoen N,Kosonsiriluk S,Prakobsaeng N,Songserm T,Rozenboim I,Halawani ME,Chaiseha Y

更新日期：2008-10-01 00:00:00

abstract：:As an alternative to radioimmunoassays, a simple, highly sensitive and quick enzymeimmunoassay (EIA) for determination of testosterone in blood plasma of yaks on microtitreplates using second antibody coating technique and testosterone-horseradish peroxidase as a label has been developed for the first time. The wells ...

journal_title：General and comparative endocrinology

authors： Sarkar M,Dutta Borah BK,Meyer HH,Prakash BS

更新日期：2008-09-15 00:00:00

abstract：:Effects of adrenal corticosteroids on reproductive and endocrine functions of the gonads are well known, but reciprocal effects of gonadal hormones on the hypothalamo-pituitary-adrenal (HPA) axis and on adrenocortical steroidogenesis in particular have received much less attention. We investigated effects of gonadecto...

journal_title：General and comparative endocrinology

authors： Carsia RV,McIlroy PJ,Cox RM,Barrett M,John-Alder HB

更新日期：2008-09-01 00:00:00

abstract：:Fecal glucocorticoid metabolite (FGM) analysis has received considerable attention in conservation biology because it has potential to be used as a noninvasive measure of stress in animals. There has been a recent and extensive literature describing the importance of technical, physiological, and biological validation...

journal_title：General and comparative endocrinology

authors： Cyr NE,Romero LM

更新日期：2008-08-01 00:00:00

abstract：:Stress is a known inhibitor of reproductive function. The mechanisms by which stress acts to influence the reproductive axis have been intensely studied and appear to be extremely varied. Gonadotropin-releasing hormone (GnRH) is a critical component of the vertebrate reproductive axis and directly causes pituitary gon...

journal_title：General and comparative endocrinology

authors： Calisi RM,Rizzo NO,Bentley GE

更新日期：2008-07-01 00:00:00

abstract：:Considerable research has been conducted on the interrelationships of the steroid hormone testosterone and reproductive behavior in seasonally breeding birds. In species in which males provide paternal care, males experience a peak in testosterone secretion that coincides with territory establishment and pair bonding,...

journal_title：General and comparative endocrinology

authors： Lynn SE

更新日期：2008-07-01 00:00:00

abstract：:The aim of this work was to investigate in situ biometric (condition index, hepato-somatic index, gonado-somatic index), biochemical (glycogen, lipids, sexual steroids) and histological (sex, sexual maturation stage) variables in the infaunal bivalve Scrobicularia plana. First, the reproductive cycle of S. plana was a...

journal_title：General and comparative endocrinology

authors： Mouneyrac C,Linot S,Amiard JC,Amiard-Triquet C,Métais I,Durou C,Minier C,Pellerin J

更新日期：2008-06-01 00:00:00