Control of gonadotropin release in the Atlantic croaker (Micropogonias undulatus): evidence for lack of dopaminergic inhibition.

abstract：:The binding characteristics of sex steroid binding protein (SBP) were investigated in vitellogenic and nonreproductive female rainbow trout (Oncorhynchus mykiss), black bream (Acanthopagrus butcheri), and greenback flounder (Rhombosolea tapirina). The binding capacity of rainbow trout and black bream SBP was significa...

journal_title：General and comparative endocrinology

authors： Hobby AC,Geraghty DP,Pankhurst NW

更新日期：2000-12-01 00:00:00

abstract：:Insulin receptor downregulation in the isolated hepatocytes of lamprey (Lampetra fluviatilis) was studied at the ambient temperature for this species. Preincubation of hepatocytes with 10(-9)-10(-8) M unlabeled insulin decreased insulin binding capacity to 43, 37, and 34% at 4, 15, and 25 degrees, respectively. Preinc...

journal_title：General and comparative endocrinology

authors： Leibush BN,Lappova YL

更新日期：1995-10-01 00:00:00

abstract：:Recently, we reported the cloning of a cDNA fragment from Fundulus heteroclitus liver encoding the open reading frame of type 2 deiodinase (FhD2). We here report the cloning of 14 kb of genomic sequence from F. heteroclitus that includes the previously reported coding region of the F. heteroclitus Dio2 gene (FhDio2), ...

journal_title：General and comparative endocrinology

authors： Orozco A,Jeziorski MC,Linser PJ,Greenberg RM,Valverde-R C

更新日期：2002-09-01 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：:It has been suggested that the functional diversity of growth hormone (GH) is related to its molecular complexity. Here we report a characterization of charge and mass variants of chicken growth hormone (cGH) through a variety of electrophoretic systems [nondenaturing (ND-PAGE), denaturing (SDS-PAGE), under reducing a...

journal_title：General and comparative endocrinology

authors： Arámburo C,Montiel JL,Perera G,Navarrete S,Sánchez R

更新日期：1990-10-01 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：:The neurohypophyseal hormones of the hippopotamus (Hippopotamus amphibius) and collared peccary (Tayassu angulatus) were isolated by molecular sieving and preparative high-pressure liquid chromatography (HPLC). Oxytocin and arginine vasopressin have been identified by their amino acid compositions and their retention ...

journal_title：General and comparative endocrinology

authors： Rouille Y,Chauvet MT,Chauvet J,Acher R,Hadley ME

更新日期：1988-09-01 00:00:00

abstract：:We have examined the effect of ambient water temperature on the ability of juvenile rainbow trout to respond to estradiol (E2) injection with vitellogenin (Vg) synthesis. Vg appeared in serum within 24 hr of E2 injection in fish kept at 15 degrees and rose to 70 mg/ml over a 10-day treatment period during which four i...

journal_title：General and comparative endocrinology

authors： Mackay ME,Lazier CB

更新日期：1993-02-01 00:00:00

abstract：:Natriuretic peptide type C (NPPC) and its receptor, natriuretic peptide receptor 2 (NPR2), have essential roles in maintaining meiotic arrest of oocytes in several mammalian species. However, it is not known if a similar mechanism exists in non-mammalian vertebrates. Using zebrafish as a model, we show that Nppc is ex...

journal_title：General and comparative endocrinology

authors： Pang Y,Thomas P

更新日期：2018-09-01 00:00:00

abstract：:Plasma progesterone concentrations were measured every 2 or 3 days in eastern quoll, Dasyurus viverrinus, during pregnancy (20.5 +/- 0.8 days, n = 6, mean +/- SEM) and the estrous cycle (37.5 +/- 0.7 days, n = 20, mean +/- SEM). The pattern was not apparently different between the two reproductive states. There was a ...

journal_title：General and comparative endocrinology

authors： Hinds LA

更新日期：1989-07-01 00:00:00

abstract：:Arsenic contaminates water surface and groundwater worldwide. Several studies have suggested that arsenic acts as an endocrine disruptor in mammalian and non-mammalian species, although its chronic effect during development remains largely unknown. To address this question, life cycle exposures to 0, 0.3 and 0.8ppm of...

journal_title：General and comparative endocrinology

authors： Gibson LA,Koch I,Reimer KJ,Cullen WR,Langlois VS

更新日期：2016-08-01 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：:Prolactin (PRL) and two variants of growth hormone (GH), purified from pituitaries of striped bass (Morone saxatilis) and its hybrid with white bass (M. saxatilis x M. chrysops) by gel filtration chromatography under alkaline conditions followed by reversed-phase high pressure liquid chromatography, appear similar bet...

journal_title：General and comparative endocrinology

authors： Jackson LF,Swanson P,Duan C,Fruchtman S,Sullivan CV

更新日期：2000-01-01 00:00:00

abstract：:Hagfish, Myxine glutinosa, were used in a series of experiments to determine a possible role for calcitonin in plasma and urine electrolyte balance. Individual animals were anaesthetised and implanted with polythene cannulae for monitoring blood pressure and for infusion/injection. Urine was collected by manual palpat...

journal_title：General and comparative endocrinology

authors： Wales NA

更新日期：1988-07-01 00:00:00

abstract：:Isolated brain-retrocerebral neurohemal complex of the silkworm of Bombyx mori was stimulated electrically and the released bombyxin (an insulin-like neuropeptide) was measured using time-resolved fluoroimmunoassay. The amount of bombyxin release depended on the number of stimulus pulses delivered to the axonal tract ...

journal_title：General and comparative endocrinology

authors： Suenobu A,Mizoguchi A,Ichikawa T

更新日期：2004-07-01 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：:Relaxin 3 (RLN3) is a newly-discovered member of the insulin superfamily. We isolated three RLN3-like cDNAs from the brain of the Japanese eel (Anguilla japonica). The deduced amino acid sequences of the RLN3-like cDNAs contained the two-chain structure common to relaxin including a RXXXRXXI/V motif in the B-chain. Ph...

journal_title：General and comparative endocrinology

authors： Hu GB,Kusakabe M,Takei Y

更新日期：2011-07-01 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：:Ecdysteroid production by the prothoracic glands of the tobacco hornworm, Manduca sexta was found to be under feedback control by the ecdysteroids in hemolymph using both culture in vivo in diapausing pupae lacking the brain-corpora cardiaca-corpora allata complex and the prothoracic glands and culture in vitro. Proth...

journal_title：General and comparative endocrinology

authors： Sakurai S,Williams CM

更新日期：1989-08-01 00:00:00

abstract：:Fish egg yolk is largely derived from vitellogenins, which are synthesized in the liver, taken up from the maternal circulation by growing oocytes via receptor-mediated endocytosis and enzymatically processed into yolk proteins that are stored in the ooplasm. Lipid droplets are another major component of fish egg yolk...

journal_title：General and comparative endocrinology

authors： Hiramatsu N,Todo T,Sullivan CV,Schilling J,Reading BJ,Matsubara T,Ryu YW,Mizuta H,Luo W,Nishimiya O,Wu M,Mushirobira Y,Yilmaz O,Hara A

更新日期：2015-09-15 00:00:00

abstract：:Atlantic salmon (Salmo salar) broodstock were transferred from natural (12-16 degrees C) to controlled temperatures of 14, 18 or 22 degrees C for 3 months during vitellogenesis. Fertility and survival were significantly reduced in eggs from broodstock held at 22 degrees C relative to 14 or 18 degrees C. Endocrine mech...

journal_title：General and comparative endocrinology

authors： Watts M,Pankhurst NW,King HR

更新日期：2004-02-01 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：:Early maternal effects in the form of substances accumulated in the egg, such as carotenoids and hormones, can be physiologically relevant for a good development of offspring. It has been found in different species that testosterone (T) can be beneficial to offspring by increasing growth rate, but detrimental by reduc...

journal_title：General and comparative endocrinology

authors： Cucco M,Guasco B,Malacarne G,Ottonelli R,Tanvez A

更新日期：2008-04-01 00:00:00

abstract：:The chromatographic profile of ecdysteroids (Ecds) from the midgut gland (MG) of juvenile female lobsters, Homarus americanus, was examined using high-performance liquid chromatography (HPLC) and radioimmunoassay (RIA) over four stages of the molt cycle. Upon initial examination, highly polar Ecd conjugates appeared t...

journal_title：General and comparative endocrinology

authors： Snyder MJ,Chang ES

更新日期：1992-02-01 00:00:00

abstract：:Insulin-like growth factor-1 (IGF-1) is a member of the vertebrate insulin/insulin-like growth factor/relaxin gene family necessary for growth, reproduction, and survival at both the cellular and organismal level. Its sequence, protein structure, and function have been characterized in mammals, birds, and fish; howeve...

journal_title：General and comparative endocrinology

authors： Sparkman AM,Schwartz TS,Madden JA,Boyken SE,Ford NB,Serb JM,Bronikowski AM

更新日期：2012-08-01 00:00:00

abstract：:To quantify the renal excretion of arginine vasotocin (AVT) in birds, synthetic AVT was infused into conscious Pekin ducks at rates of 0.03, 0.10, and 0.30 ng/kg/min for 30 min and the relationships between plasma and urine AVT concentrations were monitored by radioimmunoassay. As plasma AVT concentrations increased (...

journal_title：General and comparative endocrinology

authors： Gray DA

更新日期：1995-07-01 00:00:00

abstract：:To characterize the involvement of the aromatase gene during the process of sex determination in the European eel (Anguilla anguilla), the expression of its gonadal form was determined during various developmental stages. The cloned cDNA from the European eel gonad (EeCYP19) contains an open reading frame of 1539 bp, ...

journal_title：General and comparative endocrinology

authors： Tzchori I,Degani G,Hurvitz A,Moav B

更新日期：2004-09-15 00:00:00

abstract：:In lampreys, although gonadotropin (GTH) has not yet been isolated from the pituitary gland, the presence of GTH has been strongly suggested. To detect possible GTH in the sea lamprey (Petromyzon marinus) pituitary, two different cytochemical probes were tested: One was the use of antibodies to GTHs, and the other was...

journal_title：General and comparative endocrinology

authors： Nozaki M,Ominato K,Takahashi A,Kawauchi H,Sower SA

更新日期：1999-01-01 00:00:00

abstract：:Acute stress in vertebrates generally stimulates the hypothalamo-pituitary-adrenal axis and is often associated with multiple metabolic changes, such as increased gluconeogenesis, and with behavioral alterations. Little information is available, especially in free-ranging organisms, on the duration of these reversible...

journal_title：General and comparative endocrinology

authors： Deviche P,Bittner S,Davies S,Valle S,Gao S,Carpentier E

更新日期：2016-08-01 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