Coexistence of urotensin I/corticotropin-releasing factor and urotensin II immunoreactivities in cells of the caudal neurosecretory system of a teleost and an elasmobranch fish.

abstract：:The distribution and properties of nonapeptide binding sites in the kidney of the anuran Xenopus laevis were investigated using quantitative in vitro autoradiography. The binding studies were performed with [3H]arginine vasopressin (AVP) as ligand because [125I]arginine vasotocin (AVT) lacks biological activity. Speci...

journal_title：General and comparative endocrinology

authors： Kloas W,Hanke W

更新日期：1992-01-01 00:00:00

abstract：:Serum levels of 17 beta-hydroxy-4-androstene-3,11-dione (11-KT) and testosterone in the protogynous black sea bass, Centropristis striatus fluctuate annually, correlated with the breeding season. Although serum 11-KT levels in both males and females exhibit seasonality, serum estradiol-17 beta concentrations cycle ann...

journal_title：General and comparative endocrinology

authors： Cochran RC,Grier HJ

更新日期：1991-04-01 00:00:00

abstract：:The thyroid stimulating hormone receptor gene (TSHR) has been suggested to be a "domestication locus" in the chicken. A strong selective sweep over TSHR in domestic breeds together with significant effects of a mutation in the gene on several domestication related traits, indicate that the gene has been important for ...

journal_title：General and comparative endocrinology

authors： Karlsson AC,Fallahshahroudi A,Johnsen H,Hagenblad J,Wright D,Andersson L,Jensen P

更新日期：2016-03-01 00:00:00

abstract：:In rainbow trout, a variable in vivo pituitary sensitivity to GnRH has been previously observed, depending on the stage of oogenesis. The purpose of the present work was to study, in vitro, the role of oestradiol (E2) and 17 alpha-hydroxy,20 beta-dihydroprogesterone (17 alpha 20 beta P), respectively, involved in vite...

journal_title：General and comparative endocrinology

authors： Weil C,Marcuzzi O

更新日期：1990-09-01 00:00:00

abstract：:Increasing evidence shows that growth hormone (GH) expression is not limited to the pituitary, as it can be produced in many other tissues. It is known that growth hormone (GH) plays a role in the control of reproductive tract development. Acting as an endocrine, paracrine and/or autocrine regulator, GH influences pro...

journal_title：General and comparative endocrinology

authors： Luna M,Martínez-Moreno CG,Ahumada-Solórzano MS,Harvey S,Carranza M,Arámburo C

更新日期：2014-07-01 00:00:00

abstract：:Bovine thyroid-stimulating hormone (TSH) was microinjected (0.2 microliter/fish) into prometamorphic flounder larvae and the effects on metamorphosis as well as the tissue thyroxine (T4) and triiodothyronine (T3) levels were studied. After a single injection of TSH (5 mIU/g), the tissue T4 concentration increased mark...

journal_title：General and comparative endocrinology

authors： Inui Y,Tagawa M,Miwa S,Hirano T

更新日期：1989-06-01 00:00:00

abstract：:Adrenomedullin (AM) is a multifunctional evolutionarily highly conserved peptide. Although its genomic and amino acid (aa) sequences are known in several mammalian species and in fish, the structure of the AM gene remains unknown in intermediate phyla, including birds. Here, we report the structure and aa sequence of ...

journal_title：General and comparative endocrinology

authors： Zudaire E,Cuesta N,Martínez A,Cuttitta F

更新日期：2005-08-01 00:00:00

abstract：:In vertebrates, the ontogeny of several crucial organismal systems is known to occur early in life. Developmental conditions can ultimately have important consequences on adult fitness by affecting individual phenotype. These developmental effects are thought to be primarily mediated by endocrine systems, and especial...

journal_title：General and comparative endocrinology

authors： Dupont SM,Grace JK,Brischoux F,Angelier F

更新日期：2019-05-15 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 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：: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：:In insects, especially phytophagous insects, feeding behavior occurs at a regular frequency. Although a number of physiological studies have revealed various causal factors leading to feeding behavior in insects, little has been demonstrated regarding the regulatory mechanisms underlying insect feeding behavior. To co...

journal_title：General and comparative endocrinology

authors： Nagata S,Morooka N,Matsumoto S,Kawai T,Nagasawa H

更新日期：2011-05-15 00:00:00

abstract：:Experiments were carried out to test the efficiency of cryopreservation of whole testicular tissue in tench Tinca tinca and goldfish Carassius auratus and compare it to cryopreservation of isolated testicular cells. Additionally, effects of three cryoprotectants (dimethyl sulphoxyde - Me2SO, methanol - MeOH and ethyle...

journal_title：General and comparative endocrinology

authors： Marinović Z,Lujić J,Kása E,Bernáth G,Urbányi B,Horváth Á

更新日期：2017-05-01 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：:In the hypothalamus, endocannabinoids affect neuroendocrine activity by means of Gonadotropin-Releasing-Hormone-I (GnRH-I) inhibition. Since most vertebrates, human included, possess at least two GnRH molecular forms, the aim of this work was to investigate the effect of endocannabinoids on GnRH molecular forms other ...

journal_title：General and comparative endocrinology

authors： Chianese R,Ciaramella V,Fasano S,Pierantoni R,Meccariello R

更新日期：2011-09-15 00:00:00

abstract：:Y-Organs and control tissues from intact (intermolt) and 48-hr de-eyestalked Cancer antennarius donors were cultured for 12 and 24 hr in crustacean saline supplemented 10% with crab serum and containing [14C]cholesterol. Under these conditions, Y-organs took up significantly more [14C]cholesterol than ovary or muscle,...

journal_title：General and comparative endocrinology

authors： Watson RD,Spaziani E

更新日期：1985-03-01 00:00:00

abstract：:To maximize fitness, females should invest optimally in the siblings within a litter or brood and adapt this investment to environmental conditions. Chick mass and yolk androgens have been shown to influence the outcome of sibling competition. In birds, asynchronous hatching plays a major role in this process and ofte...

journal_title：General and comparative endocrinology

authors： Poisbleau M,Demongin L,Chastel O,Eens M,Quillfeldt P

更新日期：2011-02-01 00:00:00

abstract：:We investigated the development of thyroid function during the transition to endothermy in red-winged blackbirds (Agelaius phoeniceus). Thermoregulatory capabilities of blackbirds improve markedly over their relatively short nestling period (10-12 days), with the most striking improvements occurring between days 6 and...

journal_title：General and comparative endocrinology

authors： Olson JM,McNabb FM,Jablonski MS,Ferris DV

更新日期：1999-11-01 00:00:00

abstract：:The effect of salmon calcitonin (0.25 MRC mU/g body wt) was investigated on the serum calcium and inorganic phosphate levels of the frog. Rana tigrina. The hormone evokes hypocalcemia (on Day 1 and Day 3) which is followed by a significant hypercalcemia on Day 10. Thereafter, the level of calcium decreases again on Da...

journal_title：General and comparative endocrinology

authors： Srivastav AK,Rani L

更新日期：1989-04-01 00:00:00

abstract：:The maternal control directing the very first hours of life is of pivotal importance for ensuring proper development to the growing embryo. Thanks to the finely regulated inheritance of maternal factors including mRNAs and proteins produced during oogenesis and stored into the mature oocyte, the embryo is sustained th...

journal_title：General and comparative endocrinology

authors： Miccoli A,Dalla Valle L,Carnevali O

更新日期：2017-05-01 00:00:00

abstract：:Ghrelin, and nesfatin-1 (encoded by nucleobindin2/nucb2) are two metabolic peptides with multiple biological effects in vertebrates. While sex steroids are known to regulate endogenous ghrelin and NUCB2 in mammals, such actions by steroids in fish remain unknown. This study aimed to determine whether estradiol (E2) an...

journal_title：General and comparative endocrinology

authors： Bertucci JI,Blanco AM,Canosa LF,Unniappan S

更新日期：2016-03-01 00:00:00

abstract：:Studies of the ontogeny of IGF-I mRNA during embryonic and larval development of the gilthead sea bream Sparus aurata showed its expression during these early developmental stages. The present study applies in situ hybridization to localize IGF-I and IGF receptor mRNAs in 16-day larvae of S. aurata. Paraffin sections ...

journal_title：General and comparative endocrinology

authors： Funkenstein B,Almuly R,Chan SJ

更新日期：1997-09-01 00:00:00

abstract：:Hypothalamic kisspeptin plays a pivotal role in the regulation of the hypothalamic-pituitary-gonadal axis by stimulating gonadotropin-releasing hormone (GnRH) release into the portal circulation, with the subsequent release of gonadotropins. Kisspeptin and its receptor, the kisspeptin 1 receptor (Kiss1R), are also exp...

journal_title：General and comparative endocrinology

authors： Mijiddorj T,Kanasaki H,Sukhbaatar U,Oride A,Hara T,Kyo S

更新日期：2017-05-15 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：:Growth hormone (GH) is a key factor controlling postnatal growth and development. Despite growth-promoting effects in mammals, GH is not associated with muscle growth in the chicken. Janus kinase 2 (JAK2) has been identified as the first intracellular step in GH receptor (GHR) signaling in many species, however, there...

journal_title：General and comparative endocrinology

authors： Zhou Y,Wang X,Hadley J,Corey SJ,Vasilatos-Younken R

更新日期：2005-11-01 00:00:00

abstract：:The capacity for early life environmental stressors to induce programming effects on the endocrine stress response in fish is largely unknown. In this study we determined the effects of high environmental ammonia (HEA) exposure on the stress response in larval zebrafish, assessed the tolerance of embryonic and larval ...

journal_title：General and comparative endocrinology

authors： Williams TA,Bonham LA,Bernier NJ

更新日期：2017-12-01 00:00:00

abstract：:Changes in plasma luteinizing hormone (LH), testosterone, thyroxine (T4), and triiodothyronine (T3) and the height of supraorbital combs were compared in captive willow ptarmigan (Lagopus lagopus lagopus) and Svalbard ptarmigan (Lagopus mutus hyperboreus) exposed to an artificial annual cycle of daylength simulating t...

journal_title：General and comparative endocrinology

authors： Stokkan KA,Sharp PJ,Dunn IC,Lea RW

更新日期：1988-04-01 00:00:00

abstract：:Oligonucleotide probes were synthesized for the mRNAs of a pair of tilapia prolactins (tPRL177 and tPRL188) and growth hormone (tGH) based on cDNAs for the hormones of Oreochromis niloticus and amino acid sequences for the hormones of O. mossambicus. The three 45mer probes were labeled with 35S for hybridization studi...

journal_title：General and comparative endocrinology

authors： Nishioka RS,de Jesus EG,Hyodo S

更新日期：1993-01-01 00:00:00

abstract：:The pattern and kinetics of degradation of native salmon gonadotropin-releasing hormone (sGnRH) and mammalian leuteinizing hormone-releasing hormone (LHRH) by pituitary bound enzymes were studied in the gilthead seabream, Sparus aurata. sGnRH and LHRH were incubated for different periods of time with membrane or cytos...

journal_title：General and comparative endocrinology

authors： Goren A,Zohar Y,Fridkin M,Elhanati E,Koch Y

更新日期：1990-08-01 00:00:00

abstract：:Human pro-IGF-I Eb-peptide (hEb) and rainbow trout pro-IGF-I Ea-4-peptide (rtEa-4) have recently been shown to share unique biological activities [Gen. Comp. Endocrinol. 126 (2002) 342; Cell. Exp. Cell. Res. 280 (2002) 75]. To further understand the action mechanism of these proteins, we studied the binding properties...

journal_title：General and comparative endocrinology

authors： Kuo YH,Chen TT

更新日期：2003-06-15 00:00:00