Protein kinase-C mediates chicken vasoactive intestinal peptide stimulated prolactin secretion and gene expression in turkey primary pituitary cells.

abstract：:Relaxin-like gonad-stimulating peptide (RGP) of starfish Patiria (= Asterina) pectinifera is the first identified invertebrate gonadotropin to trigger final gamete maturation. Recently, chemical structures of RGP were identified in several species of starfish. Three kinds of RGP molecules are found in the class Astero...

journal_title：General and comparative endocrinology

authors： Mita M

更新日期：2016-05-01 00:00:00

abstract：:Melatonin and arylalkylamine N-acetyltransferase (AANAT), the rate-limiting enzyme in melatonin synthesis, have taken on special importance in vertebrate circadian biology. Recent identification of genes encoding two AANAT (AANAT(1) and AANAT(2)) and two subtypes of melatonin receptor (Mel-R; Mel(1a) and Mel(1b)) in s...

journal_title：General and comparative endocrinology

authors： Shi Q,Ando H,Coon SL,Sato S,Ban M,Urano A

更新日期：2004-05-01 00:00:00

abstract：:Fish have provided essential information about the structure, biosynthesis, evolution, and function of insulin (INS) as well as about the structure, evolution, and mechanism of action of insulin receptors (IR). INS, insulin-like growth factor (IGF)-1, and IGF-2 share a common ancestor; INS and a single IGF occur in Ag...

journal_title：General and comparative endocrinology

authors： Caruso MA,Sheridan MA

更新日期：2011-09-01 00:00:00

abstract：:We developed and validated a noninvasive method to quantify fecal estrogens and progestins as a tool for monitoring long-term ovarian activity in free-ranging African elephants. The lag times between iv injection of [(3)H]estradiol and [(14)C]progesterone and peak excretion of radioactivity in urine and feces were app...

journal_title：General and comparative endocrinology

authors： Wasser SK,Papageorge S,Foley C,Brown JL

更新日期：1996-05-01 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：:This experiment was performed on two groups of male Japanese quail. One had been maintained in our laboratory as a closed colony (S-group), and the other had been obtained from a commercial source (R-group). Different responses of gonadal function were found between two groups following either testosterone treatment o...

journal_title：General and comparative endocrinology

authors： Konishi H,Wada M,Homma K

更新日期：1985-09-01 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：:Avian reproduction entails complex endocrine interactions at the hypothalamic and ovarian levels. The initiation of the reproductive season is due to the reduction in melatonin and GnIH production as day length increases. The decline in GnIH permits GnRH and gonadotropin secretion starting follicle growth. Follicular ...

journal_title：General and comparative endocrinology

authors： Rangel PL,Gutierrez CG

更新日期：2014-07-01 00:00:00

abstract：:The serotonin system has been implicated in the modulation of endocrine and behavioral components of reproduction. In this study, we examined endogenous hypothalamic indolamines during sexual differentiation and long-term effects of exogenous steroids during this time. In Experiment 1, Japanese quail were studied duri...

journal_title：General and comparative endocrinology

authors： Abdelnabi MA,Ottinger MA

更新日期：2003-01-01 00:00:00

abstract：:Insulin-like growth factor I (IGF-I) plays a key role in the complex system that regulates bony fish growth, differentiation, and reproduction. The major source of circulating IGF-I is liver, but IGF-I-producing cells also occur in other organs, including the gonads. Because no data are available on the potential prod...

journal_title：General and comparative endocrinology

authors： Berishvili G,D'Cotta H,Baroiller JF,Segner H,Reinecke M

更新日期：2006-05-01 00:00:00

abstract：:Several lines of evidence suggest reproduction in the ranid frogs is potently regulated by the gonadal steroids, in particular 5alpha-dihydrotestosterone (DHT) and 17beta-estradiol (E(2)), and a non-gonadal steroid, the stress hormone corticosterone (Cort). Little is known about how these steroid hormones act upon the...

journal_title：General and comparative endocrinology

authors： Tsai PS,Lunden JB,Jones JT

更新日期：2003-12-01 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：:Bicuspid teeth are a morphological characteristic in adult metamorphosed urodeles. However, during the mating season the males of many species of plethodontid salamanders (Urodela, Plethodontidae) from northern America bear large monocuspid teeth on their jaws. Since androgen levels are elevated during the mating seas...

journal_title：General and comparative endocrinology

authors： Ehmcke J,Wistuba J,Clemen G,Schlatt S

更新日期：2003-10-15 00:00:00

abstract：:The neuroendocrine light green cells (LGCs), 4 clusters of together approximately 150 giant neurons in the cerebral ganglia of the freshwater gastropod, Lymnaea stagnalis, have been suggested to be involved in the control of growth. The present study examines in greater detail this role and possible actions on energy ...

journal_title：General and comparative endocrinology

authors： Geraerts WP

更新日期：1992-06-01 00:00:00

abstract：:Cytochalasin B (CB) and the more specific cytochalasin D (CD), disruptors of microfilament polymerization, and colchicine, an inhibitor of microtubule polymerization, were studied for their effects on cAMP and steroid production in granulosa cells of domestic fowl. Each agent was incubated with freshly dispersed cells...

journal_title：General and comparative endocrinology

authors： Iczkowski KA,Hertelendy F

更新日期：1991-06-01 00:00:00

abstract：:The effects of thyroid hormone on the production of vitamin A(2) retinoids from vitamin A(1) precursor were investigated in retinal pigmented epithelial (RPE) cells obtained from juvenile coho salmon. Specifically, changes in the production of both the storage and the free forms of radiolabeled 3,4-didehydroretinoids ...

journal_title：General and comparative endocrinology

authors： Alexander G,Sweeting R,McKeown BA

更新日期：2001-08-01 00:00:00

abstract：:The expression of the preproglucagon gene in vertebrates is markedly species- and tissue-dependent. Three peptides derived from the posttranslational processing of preproglucagon were isolated from an extract of the pancreas of the urodele Amphiuma tridactylum (threetoed amphiuma). The primary structures of the peptid...

journal_title：General and comparative endocrinology

authors： Cavanaugh ES,Nielsen PF,Conlon JM

更新日期：1996-01-01 00:00:00

abstract：:Renal actions of arginine vasotocin (AVT) and atrial natriuretic peptide (ANP) in teleosts are poorly defined. Administration of these hormones changes renal function, largely explained by systemic vascular effects. The present experiments examine the potential direct action of these hormones on the teleost nephron. T...

journal_title：General and comparative endocrinology

authors： Perrott MN,Sainsbury RJ,Balment RJ

更新日期：1993-03-01 00:00:00

abstract：:Pregnancy and lactation are key times in the life of female mammals when energetic resources must be brought to bear to produce and nurture offspring. Changes in glucocorticoid (GC) levels are central to this objective, due to their roles in modulating development and physiology and in mediating energetic tradeoffs. W...

journal_title：General and comparative endocrinology

authors： Edwards PD,Boonstra R

更新日期：2016-06-01 00:00:00

abstract：:By use of the indirect immunofluorescence method in conjunction with an elution-restaining technique, cells in the caudal neurosecretory system of the big skate (Raja binoculata) and the plainfin midshipman (Porichthys notatus) were shown to contain both urotensin I (UI)/corticotropin-releasing factor (CRF) and uroten...

journal_title：General and comparative endocrinology

authors： Onstott D,Elde R

更新日期：1986-08-01 00:00:00

abstract：:In teleost fish, the predominant brain form of cytochrome P450 aromatase (P450aromB) is a neural marker of estrogen effect, and an entry point for studying the role of hormonal and environmental estrogens on neurodevelopment and neuroplasticity. As part of a project using zebrafish to investigate these issues, we deve...

journal_title：General and comparative endocrinology

authors： Sawyer SJ,Gerstner KA,Callard GV

更新日期：2006-06-01 00:00:00

abstract：:Salmonids have four subtypes of insulin-like growth factor binding protein (IGFBP)-1, termed -1a1, -1a2, -1b1 and 1b2, owing to teleost- and a lineage-specific whole-genome duplications. We have previously produced recombinant proteins of masu salmon IGFBP-1a1 and -1b2 and conducted functional analysis. To further cha...

journal_title：General and comparative endocrinology

authors： Hasegawa R,Miura T,Kaneko N,Kizaki R,Oishi G,Tanaka H,Sato M,Shimizu M

更新日期：2020-12-01 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：:Fecal glucocorticoid metabolite analysis is a useful tool for monitoring adrenocortical activity in captive and free-ranging wildlife. Glucocorticoid metabolites may not be evenly distributed within fecal samples and this variability could affect the interpretation of glucocorticoid metabolite measurements. Furthermor...

journal_title：General and comparative endocrinology

authors： Millspaugh JJ,Washburn BE

更新日期：2003-06-01 00:00:00

abstract：:Rapid progestin effects on sperm physiology have been described in a variety of vertebrate species. Here, we briefly review the signaling pathways mediating rapid progestin induction of sperm hypermotility and increased fertility in two teleost species, Atlantic croaker and southern flounder. Acute in vitro treatment ...

journal_title：General and comparative endocrinology

authors： Tan W,Pang Y,Tubbs C,Thomas P

更新日期：2019-08-01 00:00:00

abstract：:Gene duplication is a recurring theme in the evolution of vertebrate polypeptide hormones and neuropeptides. These duplication events can lead to the formation of gene families in which divergence of function is the usual outcome. In the case of the opioid/orphanin family of genes, duplication events have proceeded al...

journal_title：General and comparative endocrinology

authors： Danielson PB,Dores RM

更新日期：1999-02-01 00:00:00

abstract：:Gonadotropin-inhibitory hormone (GnIH) is a hypothalamic neuropeptide that was isolated from the brains of Japanese quail in 2000, which inhibited luteinizing hormone release from the anterior pituitary gland. Here, we summarize the following fifteen years of researches that investigated on the mechanism of GnIH actio...

journal_title：General and comparative endocrinology

authors： Ubuka T,Son YL,Tsutsui K

更新日期：2016-02-01 00:00:00

abstract：:The aim of our study was to confirm the role of tidal pattern on the coordination of oocyte maturation and spawning in common snook Centropomus undecimalis. To do so, we studied oocyte maturation during the spawning season in relation to the tidal pattern in both males and females by means of histology and hormonal pr...

journal_title：General and comparative endocrinology

authors： Rhody NR,Davie A,Zmora N,Zohar Y,Main KL,Migaud H

更新日期：2015-12-01 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：:The present work describes the neuroanatomical distribution of the immunoreactive luteinizing hormone-releasing hormone (ir-LHRH) system in the brain of adult male and female, castrated male and developing Rana esculenta. No obvious sex differences in the distribution pattern of ir-LHRH were observed. Immunoreactive n...

journal_title：General and comparative endocrinology

authors： Rastogi RK,Di Meglio M,Iela L

更新日期：1990-06-01 00:00:00