Differential expression of estrogen receptor alpha in the embryonic adrenal-kidney-gonadal complex of the oviparous lizard, Calotes versicolor (Daud.).

abstract：:Serotonin (5-HT) is well known for modulating the release of GnRH and gonadotropin in teleosts. Reports on increased female:male ratio after the blockade of 5-HT biosynthesis proposed a role for 5-HT in brain sex differentiation. Two types of tryptophan hydroxylase (Tph), rate-limiting enzyme in the biosynthesis of 5-...

journal_title：General and comparative endocrinology

authors： Sudhakumari CC,Senthilkumaran B,Raghuveer K,Wang DS,Kobayashi T,Kagawa H,Krishnaiah Ch,Dutta-Gupta A,Nagahama Y

更新日期：2010-04-01 00:00:00

abstract：:Because of the high degree of primary sequence conservation in neuropeptides and low molecular weight polypeptide hormones, these polypeptides are not useful for constructing phylogenetic trees based on maximum parsimony analysis. This review focuses on the organization of neuropeptide and polypeptide hormone precurso...

journal_title：General and comparative endocrinology

authors： Dores RM,Rubin DA,Quinn TW

更新日期：1996-07-01 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：:We describe the reproductive cycle of Northern Pacific rattlesnakes (Crotalus oreganus) by quantifying steroid hormone concentrations and observing reproductive behaviors in free-ranging individuals. Additionally, we examined reproductive tissues from museum specimens. Plasma steroid hormone concentrations were quanti...

journal_title：General and comparative endocrinology

authors： Lind CM,Husak JF,Eikenaar C,Moore IT,Taylor EN

更新日期：2010-05-01 00:00:00

abstract：:Biologically active recombinant yellowtail kingfish follicle stimulating hormone (rytkFsh) was produced in yeast Pichia pastoris and its biological activity was demonstrated by both in-vitro and in-vivo bioassays. Incubation of ovarian and testicular fragments with the recombinant hormone stimulated E2 and 11-KT secre...

journal_title：General and comparative endocrinology

authors： Sanchís-Benlloch PJ,Nocillado J,Ladisa C,Aizen J,Miller A,Shpilman M,Levavi-Sivan B,Ventura T,Elizur A

更新日期：2017-01-15 00:00:00

abstract：:Dopamine receptors in the pituitary of the African catfish, Clarias gariepinus, were characterized using [3H]spiperone as radioligand. Specific binding of [3H]spiperone to pituitary membranes reached equilibrium within 60 min of incubation. The binding of the radioligand was tissue specific since the amount of binding...

journal_title：General and comparative endocrinology

authors： Van Asselt LA,Goos HJ,De Leeuw R,Peter RE,Hol EM,Wassenberg FP,Van Oordt PG

更新日期：1990-10-01 00:00:00

abstract：:The actions of mammalian insulin-like growth factors (IGF-I and IGF-II) and insulin on skeletal growth of the axolotl, Ambystoma mexicanum, were examined by monitoring the in vitro uptake of [35S]sulfate by cartilage. Both growth factors stimulated sulfate uptake significantly at a concentration of 13 nM. The increase...

journal_title：General and comparative endocrinology

authors： Schneider A,Hanke W

更新日期：1996-10-01 00:00:00

abstract：:Hormones play key, functional roles in mediating the tradeoff between survival and reproduction. Glucocorticoid hormones can inhibit reproduction and improve chances of survival during periods of stress. However, glucocorticoid hormones are, at times, also associated with successfully engaging in energetically costly ...

journal_title：General and comparative endocrinology

authors： Reedy AM,Edwards A,Pendlebury C,Murdaugh L,Avery R,Seidenberg J,Aspbury AS,Gabor CR

更新日期：2014-11-01 00:00:00

abstract：:In this study, we cloned a full-length cDNA encoding vitellogenin (Vg) in the Fujian oyster Crassostrea angulata. The complete Vg cDNA consists of 5160 nucleotides with a long open reading frame encoding 1641 amino acid residues. The deduced amino acid sequence shared high similarity with the Vgs of other mollusc, fis...

journal_title：General and comparative endocrinology

authors： Ni J,Zeng Z,Kong D,Hou L,Huang H,Ke C

更新日期：2014-06-01 00:00:00

abstract：:Selected physiological parameters were monitored over a 4-year period in the Barrow Island euro, Macropus robustus isabellinus, in Western Australia in a study of this species' homeostatic capabilities in an extremely arid habitat where individuals are exposed to high environmental temperatures and a lack of free wate...

journal_title：General and comparative endocrinology

authors： King JM,Bradshaw SD

更新日期：2010-05-15 00:00:00

abstract：:Species differences in the effect of male gonadal androgens on male growth are considered a possible mechanism allowing shifts in magnitude and even direction of sexual size dimorphism (SSD) in squamate reptiles. According to the bipotential growth regulation hypothesis, the androgen testosterone (T) enhances male gro...

journal_title：General and comparative endocrinology

authors： Kubička L,Golinski A,John-Alder H,Kratochvíl L

更新日期：2013-07-01 00:00:00

abstract：:The in vivo actions of human and fish insulin-like growth factor (IGF)-I have been compared to extend the understanding of the metabolism of IGFs in fish and to identify potential differences in their actions. The effects of acute administration of these proteins on the incorporation of glucose into muscle glycogen an...

journal_title：General and comparative endocrinology

authors： Degger B,Upton Z,Soole K,Collet C,Richardson N

更新日期：2000-03-01 00:00:00

abstract：:This study investigated the role of gonadotrophin and steroids in the induction of in vitro oocyte maturation in dab (Limanda limanda) and plaice (Pleuronectes platessa), two marine flatfish (Pleuronectiformes) in which the oocytes mature and ovulate in groups (or batches). Clusters of folliculated oocytes were incuba...

journal_title：General and comparative endocrinology

authors： Canario AV,Scott AP

更新日期：1990-02-01 00:00:00

abstract：:The relationships between testicular and plasma hormone levels and the decline in fertility in aging roosters were examined. Body mass, testicular mass, and fertility were measured in roosters from 20 to 72 weeks of age. Plasma was assayed for LH and testosterone, and estradiol and testicular extracts were assayed for...

journal_title：General and comparative endocrinology

authors： Weil S,Rozenboim I,Degen AA,Dawson A,Friedländer M,Rosenstrauch A

更新日期：1999-07-01 00:00:00

abstract：:Vertebrate reproduction is tightly regulated by conserved glycoprotein hormones produced by the pituitary gland. Follicle-stimulating hormone (FSH) in tetrapods and gonadotropic hormone I (GTH-I) in fishes are orthologous glycoprotein hormones that control the timing of egg production and the number of eggs produced. ...

journal_title：General and comparative endocrinology

authors： Laan M,Richmond H,He C,Campbell RK

更新日期：2002-02-15 00:00:00

abstract：:The effects of serotonin (5-HT) on gonadotropin and growth hormone release from perifused goldfish (Carassius auratus, L.) pituitary glands were studied. Serotonin, at micromolar concentrations, caused a dose-related release of gonadotropin and an inhibition of growth hormone release in pituitaries from goldfish at di...

journal_title：General and comparative endocrinology

authors： Somoza GM,Peter RE

更新日期：1991-04-01 00:00:00

abstract：:The differential impact of stress on brain functions of males and females has been widely observed in vertebrates. Recent evidence suggests that stress-induced glucocorticoid signaling affects sexual differentiation and sex changes in teleost fish. These facts led us to postulate that there were sex differences in glu...

journal_title：General and comparative endocrinology

authors： Kikuchi Y,Hosono K,Yamashita J,Kawabata Y,Okubo K

更新日期：2015-11-01 00:00:00

abstract：:Human and wildlife are exposed at critical periods of development to endocrine disruptor chemicals (EDC) that may be responsible for reproductive disorders. To test the hypothesis that in ovum exposure to EDC at a critical period for gonadal organogenesis alters post-hatching folliculogenesis and steroidogenesis in Ca...

journal_title：General and comparative endocrinology

authors： Stoker C,Beldoménico PM,Bosquiazzo VL,Zayas MA,Rey F,Rodríguez H,Muñoz-de-Toro M,Luque EH

更新日期：2008-05-01 00:00:00

abstract：:Plasma prolactin (PRL) and vitellogenin (VTG) concentrations were determined during the annual reproductive cycle of the newt Triturus carnifex Laur. Plasma PRL was measured by a radioimmunoassay using purified newt (Cynops pyrrogaster) PRL as standard and radioligand and its antibodies. Using ELISA, plasma VTG titers...

journal_title：General and comparative endocrinology

authors： Mosconi G,Yamamoto K,Kikuyama S,Carnevali O,Mancuso A,Vellano C

更新日期：1994-09-01 00:00:00

abstract：:Melatonin is a skin lightening agonist of the toad Bufo ictericus. The hormone also exhibits an autodesensitizing action as well as an inhibitory activity on the darkening response to alpha-MSH. In an attempt to pharmacologically characterize the melatonin receptor of the toad pigment cells, serotonin and N-acetylsero...

journal_title：General and comparative endocrinology

authors： Filadelfi AM,Castrucci AM

更新日期：1996-08-01 00:00:00

abstract：:The concentrations of norepinephrine in hypothalamus and norepinephrine and epinephrine in head kidney were significantly decreased in treated tilapia (Oreochromis aureus) during the time course of cold exposure (12 degrees) as compared to the control (25 degrees). The elevation of norepinephrine and epinephrine in pl...

journal_title：General and comparative endocrinology

authors： Chen WH,Sun LT,Tsai CL,Song YL,Chang CF

更新日期：2002-03-01 00:00:00

abstract：:Attractiveness in adult females of Calliphora vomitoria is correlated with ovarian development and there is a marked increase during the previtellogenic and vitellogenic periods. The development of attractiveness may result from the combined actions of ecdysteroids and juvenile hormone. A rise in total hydrocarbons pa...

journal_title：General and comparative endocrinology

authors： Trabalon M,Campan M,Porcheron P,Clement JL,Baehr JC,Moriniere M,Joulie C

更新日期：1990-11-01 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：:We studied the hepatic in vitro deconjugation and deiodination of glucuronide (G) and sulfate (S) conjugates of the thyroid hormones (TH) thyroxine (T(4)), 3,5,3'-triiodothyronine (T(3)), and 3,3', 5'-triiodothyronine (rT(3)) in trout. These conversions have not been studied in nonmammals. Deconjugation of T(4)G, T(3)...

journal_title：General and comparative endocrinology

authors： Finnson KW,McLeese JM,Eales JG

更新日期：1999-09-01 00:00:00

abstract：:The effects of dopamine administration on the adrenal gland of a lizard, Podarcis sicula, are described. Dopamine (0.7mg/100g body wt/day for 4 consecutive days) raised plasma ACTH and corticosterone levels (ACTH: from the basal level of 4.40+/-0.05-7.30+/-0.08pg/ml 24h after the fourth dopamine injection; corticoster...

journal_title：General and comparative endocrinology

authors： Capaldo A,Laforgia V,Sciarrillo R,De Falco M,Valiante S,Gay F,Virgilio F,Varano L

更新日期：2004-01-01 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：:Reptilia is the only vertebrate class in which cDNA for the gonadotropin beta subunit precursor molecule has not been cloned. We have isolated the full-length cDNA clone encoding the LH beta subunit precursor molecule and a partial cDNA clone encoding the FSH beta subunit precursor molecule from a pituitary cDNA libra...

journal_title：General and comparative endocrinology

authors： Aizawa Y,Ishii S

更新日期：2003-07-01 00:00:00

abstract：:Although present at relatively low number in the testis, spermatogonial stem cells (SSCs) are crucial for the establishment and maintenance of spermatogenesis in eukaryotes and, until recently, those cells were investigated in fish using morphological criteria. The isolation and characterization of these cells in fish...

journal_title：General and comparative endocrinology

authors： Lacerda SM,Costa GM,de França LR

更新日期：2014-10-01 00:00:00

abstract：:Baleen whales are vulnerable to environmental impacts due to low fecundity, capital breeding strategies, and their reliance on a large amount of prey resources over large spatial scales. There has been growing interest in monitoring health and physiological stress in these species but, to date, few measures have been ...

journal_title：General and comparative endocrinology

authors： Mingramm FMJ,Keeley T,Whitworth DJ,Dunlop RA

更新日期：2020-05-15 00:00:00

abstract：:We gave an accurate immunolocalization of CHH (crustacean hyperglycemic hormone) and VIH (vitellogenesis-inhibiting hormone) in the brain and the sinus gland of the woodlouse Armadillidium vulgare. The two immune sera have been respectively raised against HPLC-purified CHH and against a small peptide derived from the ...

journal_title：General and comparative endocrinology

authors： Azzouna A,Philippe M,Jarry T,Grève P,Martin G

更新日期：2003-04-01 00:00:00