Locust diuretic hormone-stimulated synthesis and excretion of cyclic-AMP: a novel Malpighian tubule bioassay.

abstract：:A clone encoding thyroid hormone receptor-beta (TR-beta) was isolated from a sea bream (Sparus aurata) ovary cDNA library. Sea bream (sb)TR-beta is closely related to its counterparts from other vertebrates and, like them, preferentially binds T3 rather than T4. However, the putative sbTR-beta protein contains a nine-...

journal_title：General and comparative endocrinology

authors： Nowell MA,Power DM,Canario AV,Llewellyn L,Sweeney GE

更新日期：2001-07-01 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：:The hypothalamic-pituitary-adrenal (HPA) axis releases glucocorticoids (GCs), or stress hormones, during the vertebrate stress response. GCs can both enhance and suppress the immune system depending on whether the experienced stressor is acute or chronic and what aspect of immune function is measured. More research is...

journal_title：General and comparative endocrinology

authors： Brooks KC,Mateo JM

更新日期：2013-11-01 00:00:00

abstract：:Previous studies have provided evidence that D-Asp plays a role in steroid-mediated reproductive biology in amphibians, reptiles, birds and mammals. To examine the molecular involvement of D-Asp on steroidogenic pathway regulation, we analysed the expression of StAR, P450 aromatase and 5αRed2 mRNAs in Pelophylax escul...

journal_title：General and comparative endocrinology

authors： Burrone L,Raucci F,Di Fiore MM

更新日期：2012-01-01 00:00:00

abstract：:Our previous study demonstrated that recombinant goldfish activin B stimulated goldfish FSHbeta but inhibited LHbeta expression. Similar to activin B, activin A also exhibited the inverse effects on the expression of the two gonadotropins. The novel dual effects of activins on FSH and LH in the goldfish raise an inter...

journal_title：General and comparative endocrinology

authors： Yuen CW,Ge W

更新日期：2004-01-01 00:00:00

abstract：:The skin of Xenopus laevis, because of its high concentrations of amidated peptides, is an excellent model for the study of neuropeptide biosynthesis. In this paper we determined levels of the mRNAs which encode cerulin and characterized the enzymatic activity which likely produces the carboxyl terminal alpha-amide mo...

journal_title：General and comparative endocrinology

authors： Spindel ER,Eipper BA,Zilberberg MD,Mains RE,Chin WW

更新日期：1987-07-01 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：:The aim of this study was to identify the major C21 steroids produced in vivo during artificially induced final oocyte maturation and spawning in female common dentex (Dentex dentex). During the spawning season, mature females were treated with a gonadotropin-releasing hormone agonist (GnRHa)-loaded delivery system, w...

journal_title：General and comparative endocrinology

authors： Greenwood LN,Scott AP,Vermeirssen EL,Mylonas CC,Pavlidis M

更新日期：2001-07-01 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：:Endocrine cells were detected at premetamorphosis, prometamorphosis, climax, and juvenile stages using an amine-inducing fluorescence technique with or without previous L-3,4-dihydroxyphenylalanine (L-DOPA) treatment. At premetamorphosis, serotonin cells exhibited yellow fluorescence in the gut primary epithelium of t...

journal_title：General and comparative endocrinology

authors： L'Hermite A,Hourdry J,Ferrand R

更新日期：1988-03-01 00:00:00

abstract：:The activity of the enzyme steroid 5 alpha-reductase in Harderian glands of adult syrian hamsters was assessed by measuring the conversion of testosterone (T) to 5 alpha-dihydrotestosterone (DHT). The optimal conditions for this reaction were determined in vitro using whole gland homogenates and [3H]testosterone as su...

journal_title：General and comparative endocrinology

authors： Vilchis F,Enriquez J,Queipo G,Pérez-Palacios G,Chávez B

更新日期：1994-11-01 00:00:00

abstract：:Components of the renin angiotensin system have been identified in many nonmammalian vertebrates. However, in many of these animals, including reptiles, the physiological functions and importance of the system remain unclear. To aid in the study of the system in a reptile we modified a commercially available radioimmu...

journal_title：General and comparative endocrinology

authors： Stephens GA,Caron B

更新日期：1988-06-01 00:00:00

abstract：:This study was designed to examine the relationship among ovulation rate, inhibin alpha-subunit gene expression, and plasma immunoreactive inhibin levels between hens laying at a high ovulation rate and hens laying at a low ovulation rate. A porcine inhibin alpha-subunit cDNA was used to examine the expression of inhi...

journal_title：General and comparative endocrinology

authors： Wang SY,Johnson PA

更新日期：1993-07-01 00:00:00

abstract：:In the present study, we have localized for the first time beta-endorphin (beta-EP)-like material in the adult and larval urodele and anuran tissues using immunohistochemical techniques. In the adult Notophthalmus viridescens and Ambystoma mexicanum, strong immunoreactivity to beta-EP antisera was observed in the regi...

journal_title：General and comparative endocrinology

authors： Vethamany-Globus S

更新日期：1989-08-01 00:00:00

abstract：:The neurohypophysial hormones of the eastern gray kangaroo (Macropus giganteus) have been isolated through molecular sieving and paper chromatoelectrophoresis. One oxytocin-like and two vasopressin-like peptides have been found. These peptides have been characterized by amino acid analysis. Mesotocin ([Ile8]-oxytocin)...

journal_title：General and comparative endocrinology

authors： Chauvet MT,Hurpet D,Chauvet J,Acher R

更新日期：1983-01-01 00:00:00

abstract：:Although neuropeptide Y (NPY) has been known to influence the release of luteinizing hormone (LH) and growth hormone (GH) from the pituitary gland of teleosts, the NPY receptor subtypes involved in the regulatory processes have not been fully defined. An attempt has been made to study the involvement of NPY Y1 recepto...

journal_title：General and comparative endocrinology

authors： Mazumdar M,Lal B,Sakharkar AJ,Deshmukh M,Singru PS,Subhedar N

更新日期：2006-11-01 00:00:00

abstract：:This study directly tested the hypothesis that 17 alpha,20 beta-dihydroxy-4-pregnen-3-one (17,20 beta-P) is a goldfish preovulatory pheromone (pheromone released at peak levels during oocyte final maturation) which increases blood gonadotropin (GtH) and milt volume in males. During spontaneous ovulation, GtH and 17,20...

journal_title：General and comparative endocrinology

authors： Stacey NE,Sorensen PW,Van der Kraak GJ,Dulka JG

更新日期：1989-07-01 00:00:00

abstract：:Growth hormone (GH) and insulin-like growth factor-I (IGF-I) play major roles in the endocrine regulation of fish growth, but their interdependency and mode of action has not been well elucidated. The GH-IGF-I system is essential for normal vertebral growth in mouse, but this has not been studied in fish. To study the...

journal_title：General and comparative endocrinology

authors： Wargelius A,Fjelldal PG,Benedet S,Hansen T,Björnsson BT,Nordgarden U

更新日期：2005-05-15 00:00:00

abstract：:Stress has long lasting effects on physiology, development, behavior, reproductive success and the survival of an individual. These effects are mediated by glucocorticoids, such as corticosterone, via glucocorticoid receptors (GR), however the exact mechanisms underlying these effects are unknown. GR have been widely ...

journal_title：General and comparative endocrinology

authors： Shahbazi M,Schmidt M,Carruth LL

更新日期：2011-12-01 00:00:00

abstract：:The possible involvement of calcium in the regulation of steroidogenesis in the goldfish was investigated using preovulatory ovarian follicles incubated in vitro. Incubation of follicles in media deficient in calcium impaired testosterone production in response to human chorionic gonadotropin (hCG) in both the presenc...

journal_title：General and comparative endocrinology

authors： Van der Kraak G

更新日期：1991-02-01 00:00:00

abstract：:Since an extrapancreatic source of insulin has been postulated in the chick embryo, insulin was sought by immunohistochemistry in the embryo before and after development of the pancreas and other tissues. Using for the first time an antiserum specific for chicken insulin, localization of insulin was investigated in wh...

journal_title：General and comparative endocrinology

authors： Bagnell CA,Baker NK,McMurtry JP

更新日期：1989-02-01 00:00:00

abstract：:Estrogen signalling is critical for ovarian differentiation in reptiles with temperature-dependent sex determination (TSD). To elucidate the involvement of estrogen in this process, adrenal-kidney-gonadal (AKG) expression of estrogen receptor (ERα) was studied at female-producing temperature (FPT) in the developing em...

journal_title：General and comparative endocrinology

authors： Inamdar LS,Khodnapur BS,Nindi RS,Dasari S,Seshagiri PB

更新日期：2015-09-01 00:00:00

abstract：:In goldfish, plasma gonadotropin levels increase during spawning in both males and females (GTH surge). A female-typical GTH surge induces ovulation (ovulatory surge), and a male-typical surge triggers milt production in response to sex pheromones released from ovulatory females. This study examined whether the male-t...

journal_title：General and comparative endocrinology

authors： Kobayashi M,Furukawa K,Kim MH,Aida K

更新日期：1997-12-01 00:00:00

abstract：:In order to elucidate details on the development of the circadian clock, the effects of light on the in vitro melatonin (MT) release and the presence of mRNAs of several clock genes in the embryonic chicken pineal gland were investigated. Chicken embryos of various developmental stages were exposed to stimuli of light...

journal_title：General and comparative endocrinology

authors： Csernus VJ,Nagy AD,Faluhelyi N

更新日期：2007-06-01 00:00:00

abstract：:Thyroidectomy of starlings (Sturnus vulgaris) prevents the decrease in hypothalamic gonadotrophin-releasing hormone (GnRH) which normally occurs at the onset of photorefractoriness. To extend this observation to another species, changes in testicular mass, bill colour, moult, and hypothalamic GnRH content were monitor...

journal_title：General and comparative endocrinology

authors： Dawson A

更新日期：1998-05-01 00:00:00

abstract：:The messenger RNA expression for the inhibin/activin subunits in the granulosa layer of avian follicles of different developmental stages has previously been reported. In the present study, we examined the pattern of secretion of these protein subunits from cultured granulosa cells (GC) of avian follicles of defined m...

journal_title：General and comparative endocrinology

authors： Johnson PA,Brooks CF,Davis AJ

更新日期：2005-05-01 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：: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：:A gonadotropin-releasing hormone (GnRH) agonist, d-Trp6-LHRH, was evaluated for its effectiveness in reducing circulating testosterone concentrations in wild Hawaiian monk seals (Monachus schauinslandi). Twenty-eight adult male seals were randomly divided into three groups: 10 were captured and treated with 7.5 mg of ...

journal_title：General and comparative endocrinology

authors： Atkinson S,Ragen TJ,Gilmartin WG,Becker BL,Johanos TC

更新日期：1998-11-01 00:00:00

abstract：:Testosterone has been suggested to be involved in the regulation of male territorial behavior. For example, seasonal peaks in testosterone typically coincide with periods of intense competition between males for territories and mating partners. However, some species also express territorial behavior outside a breeding...

journal_title：General and comparative endocrinology

authors： Apfelbeck B,Mortega K,Kiefer S,Kipper S,Vellema M,Villavicencio CP,Gahr M,Goymann W

更新日期：2013-04-01 00:00:00