Corticoids augment nuclear binding capacity for triiodothyronine in bullfrog tadpole tail fins.

abstract：:To examine the reproductive endocrinology of a large pleuronectiform fish, barfin flounder, Verasper moseri, a promising candidate for aquaculture and resource enhancement in northern Japan due to its high commercial value, three gonadotropin-releasing hormones (GnRHs) in the brain was identified by isolation of their...

journal_title：General and comparative endocrinology

authors： Amano M,Takahashi A,Yamanome T,Okubo K,Aida K,Yamamori K

更新日期：2002-05-01 00:00:00

abstract：:Gonadotrophin-releasing hormone (GnRH) is primarily related to reproductive processes in vertebrates. However other physiological roles, including functions in food intake regulation and energy status, have been demonstrated for GnRH in animals. The ten amino acid active peptide is relatively conserved throughout chor...

journal_title：General and comparative endocrinology

authors： Tuziak SM,Volkoff H

更新日期：2013-04-01 00:00:00

abstract：:Profiles of testosterone, 11-ketotestosterone, androstenedione, and estradiol were determined by RIA, and immunocytochemical techniques were employed to identify gonadotropin (GTH) I and II and gonadotropin releasing hormone (GnRH) in monosex and mixed sex populations of rainbow trout from 1 to 126 days postfertilizat...

journal_title：General and comparative endocrinology

authors： Feist G,Schreck CB

更新日期：1996-06-01 00:00:00

abstract：:Expression of the tilapia prolactin receptor (tiPRL-R) has been characterized in the intestine of Oreochromis niloticus and the levels of both tiPRL-R transcripts and tiPRL binding sites have been further analyzed in this organ, as well as in gill and kidney, during adaptation of tilapia to a hyperosmotic environment....

journal_title：General and comparative endocrinology

authors： Sandra O,Le Rouzic P,Rentier-Delrue F,Prunet P

更新日期：2001-09-01 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：:Plasma levels of corticosterone and aldosterone were determined by radioimmunoassay in ducks consuming diets containing different concentrations of sodium and potassium. Compared with control diet birds, maintenance on a high-Na+ diet for 5 days caused a 2-fold increase in the basal plasma corticosterone concentration...

journal_title：General and comparative endocrinology

authors： Klingbeil CK

更新日期：1985-04-01 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：:The possum is a seasonally breeding marsupial which gives birth in Queensland from March through to September. To ascertain whether this seasonality in breeding is manifest in the male reproductive system, body weight and plasma testosterone concentrations were examined in five possums. Plasma testosterone concentrati...

journal_title：General and comparative endocrinology

authors： Gemmell RT,Cepon G,Barnes A

更新日期：1986-04-01 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：:The purpose of this study was to examine the effect of the daily infusion of corticosterone on reproductive function in the laying hen and to determine the relationship between the cyclic pattern of plasma concentrations of corticosterone on the open-period for the preovulatory release of LH. An exogenous rhythm of pl...

journal_title：General and comparative endocrinology

authors： Petitte JN,Etches RJ

更新日期：1991-09-01 00:00:00

abstract：:In fish, melatonin is reported to be produced mainly in the pineal organ, but there is also evidence for the presence of melatonin in a number of extrapineal sites where it could act as an intracellular mediator or paracrine signal. The present study use the reverse transcription-polymerase chain reaction (RT-PCR) to ...

journal_title：General and comparative endocrinology

authors： Fernández-Durán B,Ruibal C,Polakof S,Ceinos RM,Soengas JL,Míguez JM

更新日期：2007-06-01 00:00:00

abstract：:The reproductive biology of the Indian major carp Cirrhinus mrigala is tightly synchronized with the seasonal changes in the environment. While the ovaries show growth from February through June, the fish spawn in July-August to coincide with the monsoon; thereafter the fish pass into the postspawning and resting phas...

journal_title：General and comparative endocrinology

authors： Biju KC,Singru PS,Schreibman MP,Subhedar N

更新日期：2003-10-01 00:00:00

abstract：:Yellow catfish (Pelteobagrus fulvidraco) is an important freshwater fish species in China. In particular, an all-male population has been commercially produced for the males grow faster than females. However, the molecular mechanisms underlying sexual dimorphism of body size and sex differentiation are still unclear i...

journal_title：General and comparative endocrinology

authors： Xiong S,Jing J,Wu J,Ma W,Dawar FU,Mei J,Gui JF

更新日期：2015-05-15 00:00:00

abstract：:Isospecific injections of intercerebral commissure (COM) extracts of L. stagnalis, L. palustris, and L. ovata (Lymnaeidae) and of extracts of COM/mediodorsal bodies complexes (COM/DB) of Bulinus truncatus (Bulinidae) and Biomphalaria glabrata (Planorbidae) induced oviposition in a high percentage of the experimental s...

journal_title：General and comparative endocrinology

authors： Dogterom GE,van Loenhout H

更新日期：1983-10-01 00:00:00

abstract：:Several antisera specific to neuropeptides of vertebrates were applied to sections of the earthworm Eisenia fetida Sav. Some of them were able to reveal specific neurones of the supraoesophageal ganglion: h-GHRF, CRF, Leu- and Met-enkephalin, dynorphin, substance P, CCK-8, and CCK-8S. A map of different areas or nucle...

journal_title：General and comparative endocrinology

authors： Lkhider M,Marcel R,Tramu G

更新日期：1987-03-01 00:00:00

abstract：:Vitamin D binding protein (DBP) was isolated from the plasma of the snapping turtle, Chelydra serpentina (mixed sex adult), and compared with the previously characterized dual function binding plasma protein that binds both thyroxine (T4) and vitamin D (tsTDBP) in an emydid turtle, Trachemys scripta. Purification of C...

journal_title：General and comparative endocrinology

authors： Horowitz M,Licht P

更新日期：1996-12-01 00:00:00

abstract：:In anaesthetized young (6 weeks old) and adult (22-30 weeks old) domestic fowl, the administration of thyrotrophin releasing hormone (TRH; 1.0 micrograms/kg in young birds; 10.0 micrograms/kg in adults) or human pancreatic growth hormone-releasing factor (hpGRF(1-44)NH2; 10.0 micrograms/kg in both cases) markedly incr...

journal_title：General and comparative endocrinology

authors： Scanes CG,Harvey S

更新日期：1985-07-01 00:00:00

abstract：:Using morpholino antisense oligonucleotide (MO) technology, we blocked leptin A or leptin receptor expression in embryonic zebrafish, and analyzed consequences of leptin A knock-down on fish development. Embryos injected with leptin A or leptin receptor MOs (leptin A or leptin receptor morphants) had smaller bodies an...

journal_title：General and comparative endocrinology

authors： Liu Q,Dalman M,Chen Y,Akhter M,Brahmandam S,Patel Y,Lowe J,Thakkar M,Gregory AV,Phelps D,Riley C,Londraville RL

更新日期：2012-09-15 00:00:00

abstract：:Growth hormone (GH) regulates essential physiological functions in teleost fishes, including growth, metabolism, and osmoregulation. Recent studies have identified two clades of putative receptors for GH (GHR1 clade and GHR2 clade) in fishes, both of which are highly expressed in the liver. Moreover, the liver is an i...

journal_title：General and comparative endocrinology

authors： Pierce AL,Breves JP,Moriyama S,Uchida K,Grau EG

更新日期：2012-10-01 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：: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：: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：: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：:To study the expression of four estrogen receptor genes (erα1, erα2, erβ1, erβ2) of female rainbow trout (Oncorhynchus mykiss) during first ovarian development, trouts were sampled from different ovarian stages. Serum E2 (estradiol) was measured by ELISA and estrogen receptors mRNA expression were examined by qRT-PCR....

journal_title：General and comparative endocrinology

authors： Hou ZS,Wen HS,Li JF,He F,Li Y,Tao YX

更新日期：2018-04-01 00:00:00

abstract：:In the current study we investigated the interaction of hypothalamic paraventricular nucleus (PVN) glucagon-like peptide-1 (GLP-1) and ghrelin signaling in the control of metabolic function. We first demonstrated that acylated ghrelin injected directly into the PVN reliably altered the respiratory exchange ratio (RER)...

journal_title：General and comparative endocrinology

authors： Abtahi S,Howell E,Salvucci JT,Bastacky JMR,Dunn DP,Currie PJ

更新日期：2019-01-01 00:00:00

abstract：:The skeletal muscles of ectothermic vertebrates possess an elevated glyconeogenic capacity that is responsible for a major portion of lactate removal and glycogen resynthesis following exercise. In lizards, changes in plasma hormone levels and the influence of differing hormone levels on muscle metabolism postexercise...

journal_title：General and comparative endocrinology

authors： Scholnick DA,Weinstein RB,Gleeson TT

更新日期：1997-05-01 00:00:00

abstract：:To better understand the role(s) of progesterone in fish spermatogenesis, we cloned the nuclear progesterone receptor (Pgr) of Atlantic cod. The open-reading frame of the cod pgr consists of 2076 bp, coding for a 691-amino acids-long protein that shows the highest similarity with other piscine Pgr proteins. Functional...

journal_title：General and comparative endocrinology

authors： Chen SX,Almeida FF,Andersson E,Taranger GL,Schmidt R,Schulz RW,Bogerd J

更新日期：2012-10-01 00:00:00

abstract：:Regression of the müllerian ducts in mammals and birds is caused by the testicular hormone, müllerian inhibiting substance (MIS), which is produced for an extended period of time after testicular differentiation. Because it is present long after the ducts regress, it has been proposed to have additional effects other ...

journal_title：General and comparative endocrinology

authors： Austin HB

更新日期：1994-10-01 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：:Seasonal changes in testicular structure and function in three species of Korean frogs (Rana nigromaculata, R. rugosa, and R. dybowskii) having different breeding seasons and habitats were examined throughout the year. R. nigromaculata live in rice fields and breed in early May. Their gonadosomatic index (GSI) and tes...

journal_title：General and comparative endocrinology

authors： Ko SK,Kang HM,Im WB,Kwon HB

更新日期：1998-09-01 00:00:00