Immunocytochemical and histological differences in the interrenal axis of feral brown trout, Salmo trutta, in metal-contaminated waters.

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：:Measuring hair cortisol has attracted interest as a long term parameter for chronic stress evaluation. However, some studies support the hypothesis that locally produced cortisol, originating from the hair follicle or skin cells, affects concentrations in the hair. In an animal model the influence of different treatme...

journal_title：General and comparative endocrinology

authors： Salaberger T,Millard M,Makarem SE,Möstl E,Grünberger V,Krametter-Frötscher R,Wittek T,Palme R

更新日期：2016-07-01 00:00:00

abstract：:The doublesex and mab-3 related transcription factor (Dmrt) gene family is known to be related to the sexual regulators doublesex of arthropods and mab-3 of annelids and to hold highly conserved functions in sexual determination and differentiation across phyla. Here, we report a study of the Dmrt gene family in the f...

journal_title：General and comparative endocrinology

authors： Amterat Abu Abayed F,Manor R,Aflalo ED,Sagi A

更新日期：2019-10-01 00:00:00

abstract：:Previous investigations have shown that the release of PRL and GH from the tilapia pituitary is directly sensitive to osmotic pressure and a variety of endocrine and neuroendocrine factors. The present studies were aimed at determining whether the spontaneous release of PRL and GH, in vitro, is: (1) sensitive to the n...

journal_title：General and comparative endocrinology

authors： Rodgers BD,Helms LM,Grau EG

更新日期：1992-06-01 00:00:00

abstract：:Melatonin binding sites were examined in the quail eye using 2-[125]iodomelatonin. Radioreceptor assays indicated similar binding sites in membrane preparations of neural retina (NR) and choroid-retinal pigment epithelium (C-RPE) eye components. In both tissues binding of the radioligand was specific, saturable, and o...

journal_title：General and comparative endocrinology

authors： James K,Skene DJ,Lucini V,Stankov B,Arendt J

更新日期：1995-11-01 00:00:00

abstract：:Long-term administration of L-thyroxine (T4) in the wax bill (lal munia) inhibited the current gonad development cycle, and the increase in gonadal volume in the second cycle was suppressed only by higher concentrations. Gonadal inhibition by high but not by low doses of L-T4 was associated with a failure in the devel...

journal_title：General and comparative endocrinology

authors： Thapliyal JP,Gupta BB

更新日期：1984-07-01 00:00:00

abstract：:The developmental expression of gonadotropin-releasing hormone receptor (GnRH-R) and its splice variants was examined in the gonads of tammar wallaby pouch young in order to elucidate the functional role of GnRH-R in the developing testis and ovary. Wallaby GnRH-R, like eutherian GnRH-Rs, contains three exons and two ...

journal_title：General and comparative endocrinology

authors： Cheung TC,Hearn JP

更新日期：2003-08-01 00:00:00

abstract：:Insulin-like growth factor-1 (IGF-1) is a member of the vertebrate insulin/insulin-like growth factor/relaxin gene family necessary for growth, reproduction, and survival at both the cellular and organismal level. Its sequence, protein structure, and function have been characterized in mammals, birds, and fish; howeve...

journal_title：General and comparative endocrinology

authors： Sparkman AM,Schwartz TS,Madden JA,Boyken SE,Ford NB,Serb JM,Bronikowski AM

更新日期：2012-08-01 00:00:00

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：:Faecal glucocorticoid metabolite (fGCM) concentrations have been used to evaluate adrenal activity in a variety of species; including as an indicator of the physiological response to social stress. However, across studies, the relationships between dominance rank, social behaviours and adrenal responses can be inconsi...

journal_title：General and comparative endocrinology

authors： Edwards KL,Walker SL,Bodenham RF,Ritchie H,Shultz S

更新日期：2013-06-01 00:00:00

abstract：:Twelve male edible dormice, captured in the autumn of 1979, were studied for 2 years under natural lighting in an animal enclosure with permanently open windows, at Montpellier, in Southern France (latitude 43 degrees 50' N). Ambient temperature fluctuated annually between +4 and 27 degrees, and the photoperiod betwee...

journal_title：General and comparative endocrinology

authors： Jallageas M,Assenmacher I

更新日期：1983-06-01 00:00:00

abstract：:Prostaglandin F2 alpha (PGF2 alpha), progesterone, androgens (testosterone + dihydrotestosterone), and 17 beta-estradiol were measured in the plasma of male frogs, Rana esculenta, by radioimmunoassays. Plasma concentrations of PGF2 alpha were higher from October to December and peaked in March (prereproduction) and in...

journal_title：General and comparative endocrinology

authors： Gobbetti A,Zerani M,Bolelli GF,Botte V

更新日期：1991-06-01 00:00:00

abstract：:Gonadotropin-releasing hormone (GnRH) plays a central role in vertebrate reproduction. The evolutionary origin of this neuropeptide and its receptor is not obvious, but the advent of genomics makes it possible to examine the roots of GnRH and delve deeper into its ancestral relationships. New peptide sequences identif...

journal_title：General and comparative endocrinology

authors： Roch GJ,Busby ER,Sherwood NM

更新日期：2011-03-01 00:00:00

abstract：:Naked mole rats seem to be naturally deficient in cholecalciferol yet exhibit net calcium and inorganic phosphorus absorption efficiencies that approach a physiological maximum (i.e., exceed 94%). Oral supplementation with cholecalciferol therefore does not markedly enhance the efficiency of gastrointestinal absorptio...

journal_title：General and comparative endocrinology

authors： Yahav S,Buffenstein R,Pettifor JM

更新日期：1993-01-01 00:00:00

abstract：:The distribution of the cannabinoid CB1 receptor and its relationships with individual endocrine cell types were investigated by immunohistochemistry in the anterior lobe of the Xenopus adenohypophysis. By use of a specific primary antibody raised in rabbit against the amino terminus of the rat CB1, we have found nume...

journal_title：General and comparative endocrinology

authors： Cesa R,Guastalla A,Cottone E,Mackie K,Beltramo M,Franzoni MF

更新日期：2002-01-01 00:00:00

abstract：:Three types of cDNA encoding the arginine vasotocin (AVT) receptors from the newt, Cynops pyrrhogaster were cloned and the gene expression of each receptor analyzed in the organs and tissues of the newt. The deduced amino acid sequence of one type of AVT receptor, consisting of 418 amino acid residues, showed a high d...

journal_title：General and comparative endocrinology

authors： Hasunuma I,Sakai T,Nakada T,Toyoda F,Namiki H,Kikuyama S

更新日期：2007-05-01 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：:Insulin, glucagon, somatostatin-14, and three structurally related molecular forms of peptide tyrosine-tyrosine (PYY) were isolated from an extract of the combined pancreas and gastrointestinal tract of the pallid sturgeon, Scaphirhynchus albus. Pallid sturgeon insulin was identical to insulin from the Russian sturgeo...

journal_title：General and comparative endocrinology

authors： Kim JB,Gadsbøll V,Whittaker J,Barton BA,Conlon JM

更新日期：2000-12-01 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：:The thyroid hormone plays an essential role in the metamorphosis in flatfish, during which external asymmetry (for example, eye relocation and pigmentation) is established. However, no information is available on the expression mechanisms of metamorphic asymmetry. Since the presence of malformed juveniles (having eith...

journal_title：General and comparative endocrinology

authors： Tagawa M,Aritaki M

更新日期：2005-04-01 00:00:00

abstract：:Growth hormone (GH) has many actions in vertebrates, including the regulation of two disparate metabolic processes: growth promotion (anabolic) and the mobilization of stored lipids (catabolic). Our previous studies showed that GH stimulated IGF-1 production in hepatocytes from fed rainbow trout, but in cells from fas...

journal_title：General and comparative endocrinology

authors： Bergan-Roller HE,Ickstadt AT,Kittilson JD,Sheridan MA

更新日期：2017-07-01 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：:In the summer of 1991 (late May to early September), I measured seasonal levels of plasma androgens in two species of plethodontid salamanders to assess the temporal relationship of elevated plasma androgen levels with spermatogenic events and with sexual behavior. In both species, spermatogenesis occurs in the spring...

journal_title：General and comparative endocrinology

authors： Woodley SK

更新日期：1994-11-01 00:00:00

abstract：:The vasoconstrictive and cardiovascular actions of a recently identified bradykinin (BK)-related peptide (Gly-Ile-Thr-Ser-Trp-Leu-Pro-Phe) from the little skate, Leucoraja erinacea were examined in the unanesthetised little skate. Intra-arterial administration of a skate BK (0.1-1 nmolkg(-1)) produced a hypertensive r...

journal_title：General and comparative endocrinology

authors： Dasiewicz PJ,Conlon JM,Anderson WG

更新日期：2011-11-01 00:00:00

abstract：:The effects of estradiol (E2) on growth hormone (GH) production was investigated in gonad-intact female goldfish. It was first necessary to generate a specific antibody for use in immunocytochemistry, Western, and dot-blot analyses of GH production. To accomplish this, grass carp GH (gcGH) cDNA was cloned by the rever...

journal_title：General and comparative endocrinology

authors： Zou JJ,Trudeau VL,Cui Z,Brechin J,Mackenzie K,Zhu Z,Houlihan DF,Peter RE

更新日期：1997-04-01 00:00:00

abstract：:This study examines the regulation of thyroid activity in adult rough-skinned newts, Taricha granulosa. Aquatic, breeding-condition newts were hypophysectomized and were injected for 23 days with the mammalian adenohypophysial hormones: ACTH, PRL, and GH. During a fourth week of treatment, these newts also received TS...

journal_title：General and comparative endocrinology

authors： Specker JL,Brown PS,Brown SC

更新日期：1985-08-01 00:00:00

abstract：:In higher animals, it is now generally accepted that neurosteroids are steroids that are synthesized in the brain itself, but it remains unclear where, in terms of the phylogeny of chordates, such neurosteroids are first synthesized? We have tried to detect progesterone immunohistochemically in the central nervous sys...

journal_title：General and comparative endocrinology

authors： Takeda N,Kubokawa K,Matsumoto G

更新日期：2003-07-01 00:00:00

abstract：:The social environment of reproducing females can cause physiological changes, with consequences for reproductive investment and offspring development. These prenatal maternal effects are often found to be sex-specific and may have evolved as adaptations, maximizing fitness of male and female offspring for their futur...

journal_title：General and comparative endocrinology

authors： Langen EMA,von Engelhardt N,Goerlich-Jansson VC

更新日期：2018-07-01 00:00:00

abstract：:The discovery of novel members of the CRF neuropeptide family, urocortin 1 (Ucn1), urocortin 2 and 3 has provided important insights into stress adaptation pathways, and predicted that stress adaptation involves more systems than the HPA-axis alone. This mini-review aims to summarize our recent data and research by ot...

journal_title：General and comparative endocrinology

authors： Kozicz T

更新日期：2007-08-01 00:00:00

abstract：:The majority of birds use environmental cues to time their reproduction. Photoperiod is the most dominant cue, but other environmental factors may play a critical role in successful reproduction. Some previous studies show the effect of temperature on the timing of nest building and reproduction. Here we tested if the...

journal_title：General and comparative endocrinology

authors： Renthlei Z,Hmar L,Kumar Trivedi A

更新日期：2021-01-15 00:00:00