Variations of vitamin D-like reactivity in the crustacean Orchestia cavimana during the molt cycle.

abstract：:Circannual and circadian variations in plasma levels of steroids were estimated by radioimmunoassay in the female and male catfish, Heteropneustes fossilis, over two consecutive annual reproductive cycles. In the female catfish, testosterone (T), estradiol-17 beta (E2), and estrone (E1) were detectable in the plasma o...

journal_title：General and comparative endocrinology

authors： Lamba VJ,Goswami SV,Sundararaj BI

更新日期：1983-05-01 00:00:00

abstract：:The effects of PGE1, PGE2, PGF2 alpha (2 micrograms/ml), and forskolin (10 microM) on follicle contraction of brook trout (salvelinus fontinalis) were studied by measuring the weight loss of punctured follicles during in vitro incubation. PGE1, PGE2, and forskolin significantly inhibited spontaneous contraction of fol...

journal_title：General and comparative endocrinology

authors： Hsu SY,Goetz FW

更新日期：1992-12-01 00:00:00

abstract：:A protein with insulin-like effects was isolated from the hepatopancreas of the lobster Panulirus argus following a classic method for mammalian insulin purification from the pancreas. After acid-alcoholic extraction and ethanol-ether precipitation followed by molecular filtration chromatography, a protein with an app...

journal_title：General and comparative endocrinology

authors： Gallardo N,Carrillo O,Moltó E,Deás M,González-Suárez R,Carrascosa JM,Ros M,Andrés A

更新日期：2003-05-01 00:00:00

abstract：:The rostral pars distalis (RPD), containing mainly prolactin (PRL)-secreting cells, of the pituitary from immature and mature tilapia was incubated for 16 hr at 27 degrees in hypoosmotic medium (300 mOsm/kg) in the presence (10(-8) and 10(-11) M) or absence of the human GnRH-associated peptide (GAP) molecule, a potent...

journal_title：General and comparative endocrinology

authors： Planas J,Bern HA,Millar RP

更新日期：1990-03-01 00:00:00

abstract：:The aim of our study was to confirm the role of tidal pattern on the coordination of oocyte maturation and spawning in common snook Centropomus undecimalis. To do so, we studied oocyte maturation during the spawning season in relation to the tidal pattern in both males and females by means of histology and hormonal pr...

journal_title：General and comparative endocrinology

authors： Rhody NR,Davie A,Zmora N,Zohar Y,Main KL,Migaud H

更新日期：2015-12-01 00:00:00

abstract：:We have previously shown that the somatic growth of barfin flounder, Verasper moseri, was promoted by green light. The present study was undertaken to elucidate whether growth-promoting effect of green light can be observed in other flatfishes and to understand the roles of endocrine systems in green light-induced gro...

journal_title：General and comparative endocrinology

authors： Shimizu D,Kasagi S,Takeuchi R,Maeda T,Furufuji S,Mizusawa K,Andoh T,Takahashi A

更新日期：2019-01-15 00:00:00

abstract：:The penultimate instar larvae of Mamestra brassicae have one ecdysteroid peak 2 days after ecdysis which induces larval ecdysis. Allatectomy deleted this peak and caused a larger peak 7 days later just before precocious pupation, in a pattern similar to the ecdysteroid titer of the last instar. Application of juvenile...

journal_title：General and comparative endocrinology

authors： Hiruma K

更新日期：1986-08-01 00:00:00

abstract：:We investigated post-natal development of the adrenocortical stress-response system in captive American kestrels (Falco sparverius) by measurements of baseline and stress-induced levels of corticosterone at ages 10, 16, 22, and 28 days post-hatching. Baseline levels of corticosterone increased significantly during pos...

journal_title：General and comparative endocrinology

authors： Love OP,Bird DM,Shutt LJ

更新日期：2003-02-01 00:00:00

abstract：:The peroxidase-antiperoxidase (PAP) immunocytochemical technique and rabbit antihuman prolactin (PRL) antiserum were used to localize and identify PRL-producing cells in the pars distalis of Bufo calamita, Hyla meridionalis, Alytes cisternasii, Pelobates cultripes, and Rana perezi tadpoles at different stages of devel...

journal_title：General and comparative endocrinology

authors： Garcia-Navarro S,Malagon MM,Garcia-Herdugo G,Gracia-Navarro F

更新日期：1988-02-01 00:00:00

abstract：:Arginine vasotocin (AVT) and isotocin (IT) are fish nonapeptides synthesized in separate hypothalamic neurons from where they are transported to the neurohypophysis for storage and release into circulation. AVT is known to modulate aggression, courtship and parental care or social communication in many species, includ...

journal_title：General and comparative endocrinology

authors： Kleszczyńska A,Sokołowska E,Kulczykowska E

更新日期：2012-01-15 00:00:00

abstract：:In crustaceans, vitellogenin (VTG, the precursor of major yolk protein) is synthesized in the ovary and/or hepatopancreas, and its synthesis is considered to be under the negative control of the vitellogenesis-inhibiting hormone (VIH), a neuropeptide secreted from the X-organ/sinus gland complex in the eyestalks. In t...

journal_title：General and comparative endocrinology

authors： Okumura T

更新日期：2006-09-01 00:00:00

abstract：:Organophosphorus pesticides are known to disturb glucose homeostasis and increase incidence of metabolic disorders and diabetes via insulin resistance. The current study investigates the influence of malathion on insulin signaling pathways and the protective effects of N-acetylcysteine (NAC). Malathion (200 mg/kg) and...

journal_title：General and comparative endocrinology

authors： Lasram MM,El-Golli N,Lamine AJ,Douib IB,Bouzid K,Annabi A,El Fazaa S,Abdelmoula J,Gharbi N

更新日期：2015-05-01 00:00:00

abstract：:Follicular development and oocyte recruitment were studied in the ovaries of long-term (2 months) hypophysectomized frogs Rana cyanophlyctis during the postbreeding season (October/November). The effects of homoplastic pituitary pars distalis homogenate (PDH) (1 pituitary per frog), 40 IU pregnant mare serum gonadotro...

journal_title：General and comparative endocrinology

authors： Pancharatna M,Saidapur SK

更新日期：1985-02-01 00:00:00

abstract：:Subcutaneous daily injections of ovine prolactin (PRL) inhibit photoperiodic induction of gonads and fattening in the female redheaded bunting (Emberiza bruniceps). However, birds respond to the same photoperiod (15L:9D) after withdrawal of the exogenous PRL. Further, PRL injections given in late hours during the subj...

journal_title：General and comparative endocrinology

authors： Tewary PD,Tripathi BK,Kumar V

更新日期：1983-11-01 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：:Transthyretin (TTR) is responsible for a major part of the binding of thyroid hormone to proteins in the plasma in amphibian tadpoles. To characterize the binding properties of amphibian TTRs, the effects of 17 hydrophobic signaling molecules, including 6 endocrine disruptors, on 3,5,3'-l-[(125)I]triiodothyronine ([(1...

journal_title：General and comparative endocrinology

authors： Yamauchi K,Prapunpoj P,Richardson SJ

更新日期：2000-09-01 00:00:00

abstract：:Plasma concentrations and stored levels of the neuroendocrine peptides arginine vasotocin (AVT) and urotensin II (UII) were measured in the euryhaline flounder (Platichthys flesus) following the acute hypo-osmotic challenge of direct seawater (SW) to fresh water (FW) transfer. Hormone measures, plasma osmolality, and ...

journal_title：General and comparative endocrinology

authors： Bond H,Winter MJ,Warne JM,McCrohan CR,Balment RJ

更新日期：2002-01-01 00:00:00

abstract：:Insulin-like growth factor I (IGF-I) plays a key role in the complex system that regulates bony fish growth, differentiation, and reproduction. The major source of circulating IGF-I is liver, but IGF-I-producing cells also occur in other organs, including the gonads. Because no data are available on the potential prod...

journal_title：General and comparative endocrinology

authors： Berishvili G,D'Cotta H,Baroiller JF,Segner H,Reinecke M

更新日期：2006-05-01 00:00:00

abstract：:In recent years, invertebrate peptides have been identified which share substantial homologies with vertebrate insulin and insulin-like growth factors (IGFs), indicating a high degree of conservation of insulin/IGF systems through animal evolution. In a previous study, we provided evidence for the presence of IGF-I-li...

journal_title：General and comparative endocrinology

authors： Richardson NA,Anderson AJ,Sara VR

更新日期：1997-03-01 00:00:00

abstract：:The objective of this study was to examine if RU486, a corticosteroid antagonist, modified hepatocyte metabolism and blocked the metabolic effects of exogenously administered cortisol in rainbow trout (Oncorhynchus mykiss). The fish were given a single intraperitoneal implant of either coconut oil alone or coconut oil...

journal_title：General and comparative endocrinology

authors： Vijayan MM,Reddy PK,Leatherland JF,Moon TW

更新日期：1994-10-01 00:00:00

abstract：:Vasotocin (VT) and vasopressin control many endocrine and neuroendocrine functions, including the regulation of reproductive behaviors. In the roughskin newt (Taricha granulosa), VT administration can enhance courtship behaviors in males and egg-laying behaviors in females. This study used immunohistochemistry to inve...

journal_title：General and comparative endocrinology

authors： Moore FL,Richardson C,Lowry CA

更新日期：2000-02-01 00:00:00

abstract：:A biochemical analysis was made of the crustacean hyperglycemic hormone (CHH) of the crayfish Astacus leptodactylus, as present in the CHH-producing perikarya, in the axonal tract and in the sinus gland, respectively. Hyperglycemic material was analyzed by polyacrylamide gel electrophoresis (PAGE and SDS-PAGE) and hig...

journal_title：General and comparative endocrinology

authors： Kallen JL,Reijntjens FM,Peters DJ,Van Herp F

更新日期：1986-02-01 00:00:00

abstract：:Rhythmicity of thyroid follicle structure, cell division, and T4 secretion in vitro was studied in anuran tadpoles on a 12L:12D cycle with light onset at 0800 hr. Stage XIII Rana pipiens larvae had a significant circadian rhythm of follicle lumen diameter (acrophase 1052 hr). Follicle cell height was higher at 0900 hr...

journal_title：General and comparative endocrinology

authors： Wright ML,Blanchard LS,Pikula A,Labieniec KE

更新日期：1995-07-01 00:00:00

abstract：:Gonads are the main source of sex steroids, which have been implicated in the regulation of sexually differentiated behavior, such as reproductive and aggressive displays. In the Mozambique tilapia (Oreochromis mossambicus) territorial males have higher androgen levels than non-territorials, express reproductive behav...

journal_title：General and comparative endocrinology

authors： Almeida O,Canário AV,Oliveira RF

更新日期：2014-10-01 00:00:00

abstract：:Growth hormones (GHs) and prolactins (Prls) purified from representatives of each vertebrate class from bony fish onwards were tested for their ability to stimulate in vivo peripheral deiodination of labeled thyroxine (T4*) into triiodo-L-thyronine (T3*) in the eel. Plasma T3*/T4* ratio was used as parameter. All GHs ...

journal_title：General and comparative endocrinology

authors： de Luze A,Leloup J,Papkoff H,Kikuyama S,Kawauchi H

更新日期：1989-02-01 00:00:00

abstract：:In 1974, a lack of 5α-dihydrotestosterone (5α-DHT), the most potent androgen across species except for fish, was shown to be the origin of a type of pseudohermaphrodism in which boys have female-like external genitalia. This human intersex condition is linked to a mutation in the steroid-5α-reductase type 2 (SRD5α2) g...

journal_title：General and comparative endocrinology

authors： Robitaille J,Langlois VS

更新日期：2020-05-01 00:00:00

abstract：:In gravid female goldfish held at 10-12 degrees, a single injection of des Gly10,[D-Ala6]luteinizing hormone-releasing hormone ethylamide (LHRH-A), or 2 injections of LHRH-A given 12 hr apart, increased serum gonadotropin (GtH) concentrations, but did not stimulate germinal vesicle migration or ovulation. Injection of...

journal_title：General and comparative endocrinology

authors： Chang JP,Peter RE

更新日期：1983-10-01 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：: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：:Feather coloration in chickens mainly depends on melanin produced by melanocytes located in the feather follicles. The melanocortin 1 receptor (MC1R) on follicular melanocytes regulates melanin synthesis; however, the source of the melanocortins that interact with the receptors remains unclear. In this study, we exami...

journal_title：General and comparative endocrinology

authors： Yoshihara C,Tashiro Y,Taniuchi S,Katayama H,Takahashi S,Takeuchi S

更新日期：2011-03-01 00:00:00