Growth hormone binding sites in tilapia (Oreochromis mossambicus) liver.

abstract：:Gonadotropin-releasing hormones (GnRH) constitute a family of neuropeptides which are important regulators of reproduction in vertebrates. The effect of mammalian GnRH (mGnRH), salmon GnRH, chicken GnRH-I, chicken GnRH-II, and lamprey GnRH-I on [3H]thymidine incorporation into DNA of dissociated gonadal cells of marin...

journal_title：General and comparative endocrinology

authors： Pazos AJ,Mathieu M

更新日期：1999-01-01 00:00:00

abstract：:Plasma concentrations of growth hormone (GH) were decreased following the intravenous administration of morphine sulfate. Maximum inhibition of GH secretion was observed 40 min after morphine sulfate challenge. At this time, doses of morphine sulfate (at 5 mg and 50 mg/kg) reduced the GH concentrations by 86 and 90%, ...

journal_title：General and comparative endocrinology

authors： Harvey S,Scanes CG

更新日期：1987-01-01 00:00:00

abstract：:Interrenal activity in relation to sexual maturity in male rainbow trout, and the effects of in vivo treatment with 11-ketotestosterone (11-KT) were investigated. Silastic pellets containing either 11-KT or no steroid were implanted in maturing male and immature male and female rainbow trout for a total of 11 weeks. T...

journal_title：General and comparative endocrinology

authors： Young G,Thorarensen H,Davie PS

更新日期：1996-09-01 00:00:00

abstract：:PACAP (pituitary adenylate cyclase activating polypeptide) is widely distributed neuropeptide acting via three subtypes of receptors, PAC(1), VPAC(1) and VPAC(2). Here we examined the localisation and nature of PACAP-immunoreactive nerves in the rat thyroid and parathyroid glands and defined the distribution of PAC(1)...

journal_title：General and comparative endocrinology

authors： Fahrenkrug J,Hannibal J

更新日期：2011-03-01 00:00:00

abstract：:Cardueline finches (canaries, goldfinches, and rosefinches, etc.) vary widely in the degree to which their natural reproductive schedules track seasonal changes in photoperiod. In this study, we tested for photo-induction of reproductive development and photorefractoriness in males of three cardueline finch species: p...

journal_title：General and comparative endocrinology

authors： Hahn TP,Pereyra ME,Sharbaugh SM,Bentley GE

更新日期：2004-05-15 00:00:00

abstract：:Fecal steroid analysis is an increasingly common non-invasive technique used in both captive and field studies to measure an animal's approximate hormonal levels and corresponding physiological state. Fecal collection in the field necessitates storage and transportation methods that will prevent the degradation of hor...

journal_title：General and comparative endocrinology

authors： Pettitt BA,Wheaton CJ,Waterman JM

更新日期：2007-01-01 00:00:00

abstract：:This study characterizes the seasonal reproductive cycle of female round stingrays (Urobatis halleri) in an open coastal site at Seal Beach, CA and a protected estuary at the Seal Beach National Wildlife Refuge (SBNWR). Female round stingrays were sampled from August 2004 to July 2006, and assessed for reproductive pa...

journal_title：General and comparative endocrinology

authors： Mull CG,Lowe CG,Young KA

更新日期：2010-04-01 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：:The insulin/PI3K/Akt signaling pathway is strongly involved in the differentiation of C2C12 cells, as has been demonstrated by the addition of IGFs and insulin to culture media. In this study, we have characterized the role of insulin in chick myoblast proliferation and differentiation in vitro and in vivo, and have r...

journal_title：General and comparative endocrinology

authors： Sato K,Aoki M,Kondo R,Matsushita K,Akiba Y,Kamada T

更新日期：2012-02-01 00:00:00

abstract：:Using DNA-cellulose affinity chromatography, an estrogen-binding component having the properties of a classical estrogen receptor was characterized from testicular cytosol of the freshwater turtle, Chrysemys picta. This putative cytoplasmic receptor exhibited high affinity (Kd = 7.0 X 10(-10) M), low capacity (1-4 fmo...

journal_title：General and comparative endocrinology

authors： Mak P,Ho SM,Callard IP

更新日期：1983-11-01 00:00:00

abstract：:It is known that in goldfish Carassius auratus, a non-sex changing fish, prostaglandin (PG) treatment can induce female-typical sex behavior in males, and androgen treatment can induce male-typical sex behavior in females. These facts suggest that goldfish have a sexually bipotential brain even after attaining sexual ...

journal_title：General and comparative endocrinology

authors： Saoshiro S,Kawaguchi Y,Hayakawa Y,Kobayashi M

更新日期：2013-01-15 00:00:00

abstract：:Extrapituitary expression of the growth hormone (GH) gene has been reported for the immune system of various vertebrates. In the rainbow trout (Oncorhynchus mykiss), GH mRNA could be detected in several lymphoid organs and leucocytes by reverse transcriptase-polymerase chain reaction (RT-PCR). To understand the contro...

journal_title：General and comparative endocrinology

authors： Yada T,Muto K,Azuma T,Hyodo S,Schreck CB

更新日期：2005-05-15 00:00:00

abstract：:The neuropeptide gonadotropin-releasing hormone (GnRH) plays an important role in the control of reproductive functions. Vertebrates possess multiple GnRH isoforms that are classified into three main groups, namely GnRH1, GnRH2 and GnRH3. In the present study, we show that the chromosomal organization of the three GnR...

journal_title：General and comparative endocrinology

authors： Tostivint H

更新日期：2011-02-01 00:00:00

abstract：UNLABELLED:Melatonin (MT) release from explanted pineal glands of 3- to 20-week-old chicken was investigated in a 5-day perifusion system. Both the chicken and the explanted glands were exposed to various environmental lighting regimens. OBSERVATIONS:(1) The explanted chicken pineal is sensitive to direct light. Conti...

journal_title：General and comparative endocrinology

authors： Csernus V,Ghosh M,Mess B

更新日期：1998-04-01 00:00:00

abstract：:The presence of binding sites for nonecdysteroid steroids was investigated in the cytosol of several tissues of the migratory locust, Locusta migratoria migratorioides. Binding of androgens was not observed. Most tissues, however, showed nonsaturable binding of estrogens and in some tissues saturable progestin binding...

journal_title：General and comparative endocrinology

authors： Paesen G,Novak F,Swevers L,De Clerck D,De Loof A

更新日期：1988-12-01 00:00:00

abstract：:The somatotropic axis, or growth hormone-insulin-like growth factor-1 (GH-IGF-1) axis, of fish is involved in numerous physiological process including regulation of ionic and osmotic balance, lipid, carbohydrate and protein metabolism, growth, reproduction, immune function and behavior. It is thought that GH plays a r...

journal_title：General and comparative endocrinology

authors： Besseau L,Fuentès M,Sauzet S,Beauchaud M,Chatain B,Covès D,Boeuf G,Falcón J

更新日期：2013-12-01 00:00:00

abstract：:How nestling birds respond to stressful situations may constitute an important survival component that has lasting developmental effects on the hypothalamic pituitary adrenal (HPA) axis. As birds are exposed to increasing amounts of potential anthropogenic stressors through land use change, understanding how these fac...

journal_title：General and comparative endocrinology

authors： Strasser EH,Heath JA

更新日期：2011-08-01 00:00:00

abstract：:Effects of epidermal growth factor (EGF) and possible mechanisms of EGF-mediated signal transduction were investigated in isolated cells of the digestive gland of the mussel (Mytilus galloprovincialis Lam. ). EGF induced a cytosolic Ca2+ transient and subsequently stimulated DNA synthesis; both effects were dose-depen...

journal_title：General and comparative endocrinology

authors： Canesi L,Ciacci C,Orunesu M,Gallo G

更新日期：1997-08-01 00:00:00

abstract：:Maintaining energy balance and reproducing are important for fitness, yet animals have evolved mechanisms by which the hypothalamus-pituitary-adrenal/interrenal (HPA/HPI) axis can shut these activities off. While HPA/HPI axis inhibition of feeding and reproduction may have evolved as a predator defense, to date there ...

journal_title：General and comparative endocrinology

authors： Harris BN,Carr JA

更新日期：2016-05-01 00:00:00

abstract：:The Harderian gland of the lizard Podarcis sicula sicula (Raf) contains connective tissue type mast cells whose numbers vary during the year showing two peaks, one in spring the other in winter. No sex differences are found throughout the year. Thermal and photoperiodic manipulations indicate that only temperature inf...

journal_title：General and comparative endocrinology

authors： Vitiello II,Baccari GC,Di Matteo L,Rusciani A,Chieffi P,Minucci S

更新日期：1997-09-01 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：:Flatfishes with more body height after metamorphosis should be better adapted to a benthic lifestyle. In this study, we quantified the changes in body height during metamorphosis in two flatfish species, Paralichthys olivaceus and Platichthys stellatus. The specific pattern of cell proliferation along the dorsal and v...

journal_title：General and comparative endocrinology

authors： Xu J,Ke Z,Xia J,He F,Bao B

更新日期：2016-09-15 00:00:00

abstract：:Abnormalities in calcium (Ca(2+)) homeostasis are reported in horses with several pathological conditions; however, there is little information on Ca(2+) regulation in horses. The objectives of the present study were to determine the Ca(2+) set-point in healthy horses, to determine whether the Ca(2+)/parathyroid hormo...

journal_title：General and comparative endocrinology

authors： Toribio RE,Kohn CW,Sams RA,Capen CC,Rosol TJ

更新日期：2003-02-15 00:00:00

abstract：:Four monoclonal antibodies (MA-5, MA-10, MA-20, and MA-51) and one polyclonal antibody (ARS-2) against human insulin receptor were used to immunoprecipitate the insulin receptor from several species which had been photolabeled with N epsilon B29-monoazido-benzoyl-[125I]iodoinsulin. All four monoclonal antibodies immun...

journal_title：General and comparative endocrinology

authors： Tong ZQ,Jack E,Moule M,Goldfine ID,Yip CC

更新日期：1994-06-01 00:00:00

abstract：:Galanin is a multi-functional neuropeptide that is widely distributed in the mammalian central nervous system and peripheral tissues. It exerts multiple physiological functions through interaction with 3 known G protein-coupled receptors (GPCR), namely, galanin type I, II and III (GalR1, 2 and 3) receptors, which have...

journal_title：General and comparative endocrinology

authors： Ho JC,Kwok AH,Zhao D,Wang Y,Leung FC

更新日期：2011-01-15 00:00:00

abstract：:A triacetyl form of α-melanocyte-stimulating hormone (MSH) was found in carp (Cyprinus carpio) and goldfish (Carassius auratus), by selective detection of mass profile for cell secretory granules using direct tissue matrix-assisted laser desorption ionization with time-of-flight mass spectrometry (MALDI-TOF MS) analys...

journal_title：General and comparative endocrinology

authors： Yasuda A,Tatsu Y,Shigeri Y

更新日期：2012-01-15 00:00:00

abstract：:Many vertebrates have more than one molecular form of gonadotropin-releasing hormone (GnRH) present in brain. In all cases documented to date, GnRH neurons located in the forebrain are critical players in the brain-pituitary-gonadal feedback axis although the details of how steroids regulate GnRH remain elusive. The f...

journal_title：General and comparative endocrinology

authors： Rissman EF,Li X

更新日期：1998-12-01 00:00:00

abstract：:The effects of a long term partial food restriction were studied in chickens and rats. In chickens the treatment resulted in increased plasma T4 levels while T4 levels in rats remained unchanged. Plasma T3 decreased in both species. In vitro hepatic outer ring deiodinating type I (ORD-I) activity was not influenced by...

journal_title：General and comparative endocrinology

authors： Darras VM,Cokelaere M,Dewil E,Arnouts S,Decuypere E,Kühn ER

更新日期：1995-12-01 00:00:00

abstract：:Homogenates of ovaria as well as testes from the locust Locusta migratoria were analyzed for the presence of pregnenolone, testosterone, and estradiol by gas chromatography followed by mass spectrometry. Selected ion monitoring analyses revealed that the molecular ion and two characteristic fragment ions of pregnenolo...

journal_title：General and comparative endocrinology

authors： Novak FJ,Lambert JG

更新日期：1989-10-01 00:00:00

abstract：:Kisspeptin is a potent regulator of the hypothalamo-pituitary-gonadal axis. The activation of several vernal and pubertal behaviors involves the action of locally synthesized estradiol by hypothalamic aromatase-expressing neurons. Little is known about kisspeptin in non-mammalian systems, and its interaction with arom...

journal_title：General and comparative endocrinology

authors： Saldanha CJ,Walters BJ,Fraley GS

更新日期：2010-05-01 00:00:00