abstract：:Anuran amphibians do not drink orally but absorb water osmotically through the highly permeable ventral skin. In this cutaneous water absorption, roles of the putative cerebral osmoreceptors and functions of arginine vasotocin (AVT) were examined in the central nervous system of the Japanese treefrog, Hyla japonica. I...

journal_title：General and comparative endocrinology

authors： Maejima S,Yamada T,Hamada T,Matsuda K,Uchiyama M

更新日期：2008-06-01 00:00:00

abstract：:Development patterns in birds range from precocial species, which hatch chicks largely capable of independent existence, to altricial species, chicks of which are highly dependent on their parents for extended periods. Previous work indicates precocial chicks have a robust corticosterone response from hatching whereas...

journal_title：General and comparative endocrinology

authors： Adams NJ,Cockrem JF,Candy EJ,Taylor GA

更新日期：2008-05-15 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：:The factors influencing prolactin (PRL) variation in birds and in wildlife in general have rarely been investigated with respect to the physiological impacts of exposure to environmental contaminants. We investigated the associations between circulating baseline PRL levels and concentrations of eight persistent organo...

journal_title：General and comparative endocrinology

authors： Verreault J,Verboven N,Gabrielsen GW,Letcher RJ,Chastel O

更新日期：2008-05-01 00:00:00

abstract：:Previous data have shown that regional differences in the presence of anterior pituitary luteinizing hormone (LH) generally correlate with the comparable disparities in distribution of gonadotropes throughout the gland. In female rats, the differences are apparent over the estrous cycle, but are more prominent during ...

journal_title：General and comparative endocrinology

authors： Goldman JM,Stoker TE,Murr AS,McElroy WK,Cooper RL

更新日期：2008-05-01 00:00:00

abstract：:Early maternal effects in the form of substances accumulated in the egg, such as carotenoids and hormones, can be physiologically relevant for a good development of offspring. It has been found in different species that testosterone (T) can be beneficial to offspring by increasing growth rate, but detrimental by reduc...

journal_title：General and comparative endocrinology

authors： Cucco M,Guasco B,Malacarne G,Ottonelli R,Tanvez A

更新日期：2008-04-01 00:00:00

abstract：:Over the last decade, field endocrinologists have explored the efficacy of using plasma corticosterone concentrations of breeding seabirds as an indicator of food availability and predictor of breeding success. However, studies have been predominately confined to adults and the results have been inconsistent. We exami...

journal_title：General and comparative endocrinology

authors： Brewer JH,O'Reilly KM,Dean Kildaw S,Loren Buck C

更新日期：2008-04-01 00:00:00

abstract：:The titer of juvenile hormone (JH), which has wide ranging physiological effects in insects, is regulated in part by JH esterase (JHE). We show that overexpression in Drosophila melanogaster of the JHE binding protein, DmP29 results in a series of apparent anti-JH effects. We hypothesize that DmP29 functions in transp...

journal_title：General and comparative endocrinology

authors： Liu Z,Li X,Prasifka JR,Jurenka R,Bonning BC

更新日期：2008-03-01 00:00:00

abstract：:Plasma concentrations of stress hormones [adrenaline (ADR), noradrenaline (NR)], lactate, glucose and CO2 were monitored during peak nesting period (May-October) at different phases of nesting in the green turtle, Chelonia mydas. These include, emergence from sea, excavating body and nest chambers, oviposition, coveri...

journal_title：General and comparative endocrinology

authors： Alkindi AY,Al-Habsi AA,Mahmoud IY

更新日期：2008-02-01 00:00:00

abstract：:Insects are the most abundant animal group on Earth and have been the subject of genetic and physiological studies since the beginning of the 19th century. The public interest in understanding their biology increased as many insects have proven to exert a severe impact on human welfare and the environment. To trigger ...

journal_title：General and comparative endocrinology

authors： Reumer A,Van Loy T,Clynen E,Schoofs L

更新日期：2008-01-01 00:00:00

abstract：:In mammals ghrelin has a diverse range of effects including stimulation of gut motility but although present in teleost fish its effects on motility have not been investigated. The present study used bioinformatics to search for fish paralogues of the ghrelin receptor and the closely related motilin receptor, and inve...

journal_title：General and comparative endocrinology

authors： Olsson C,Holbrook JD,Bompadre G,Jönsson E,Hoyle CH,Sanger GJ,Holmgren S,Andrews PL

更新日期：2008-01-01 00:00:00

abstract：:During metamorphosis, the tadpole neuroendocrine brain is a major target for the organisational effects of hormones acting via both endocrine feedback mechanisms and local hormone production. While the receptor-mediated actions of thyroid hormones in brain development have been well described, there is evidence that t...

journal_title：General and comparative endocrinology

authors： Hogan NS,Crump KL,Duarte P,Lean DR,Trudeau VL

更新日期：2007-10-01 00:00:00

abstract：:Measurement of fish steroids in water provides a non-invasive alternative to measurement in blood samples, offering the following advantages: zero or minimal intervention (i.e. no anaesthetic, bleeding or handling stress); results not being biased by sampling stress; repeat measurements on the same fish; the possibili...

journal_title：General and comparative endocrinology

authors： Scott AP,Ellis T

更新日期：2007-08-01 00:00:00

abstract：:Insulin is an extensively studied peptide hormone in mammals. However, insulin is not restricted to vertebrates, but has also been identified in invertebrates, among whom several insect species. These insulin-like peptides (ILPs) show structural and-at least some-functional homology with mammalian insulin and act thro...

journal_title：General and comparative endocrinology

authors： Van de Velde S,Badisco L,Claeys I,Verleyen P,Chen X,Vanden Bosch L,Vanden Broeck J,Smagghe G

更新日期：2007-08-01 00:00:00

abstract：:European silver eels are thought to undergo sexual maturation during their oceanic reproductive migration from the European continent to their spawning area in the Sargasso Sea. Tracking data and various anatomical and physiological features suggest that silver eels migrate in deep sea, leading us to hypothesise that ...

journal_title：General and comparative endocrinology

authors： Sébert ME,Amérand A,Vettier A,Weltzien FA,Pasqualini C,Sébert P,Dufour S

更新日期：2007-08-01 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：:We examined the mechanism of amiloride-sensitive Na(+) channels (ENaC) activated by fANP in epithelial cells of frog urinary bladder by using a cell-attached patch-clamp technique. ENaC activities in the epithelial cells were significantly increased following administration of both 10(-9)M fANP and 10(-5)M 8-Br-cGMP. ...

journal_title：General and comparative endocrinology

authors： Yamada T,Matsuda K,Uchiyama M

更新日期：2007-06-01 00:00:00

abstract：:In fish, melatonin is reported to be produced mainly in the pineal organ, but there is also evidence for the presence of melatonin in a number of extrapineal sites where it could act as an intracellular mediator or paracrine signal. The present study use the reverse transcription-polymerase chain reaction (RT-PCR) to ...

journal_title：General and comparative endocrinology

authors： Fernández-Durán B,Ruibal C,Polakof S,Ceinos RM,Soengas JL,Míguez JM

更新日期：2007-06-01 00:00:00

abstract：:A brief description is given of the discovery of PTHrP and the roles of the peptide in mammalian physiology. Next, the occurrence of PTHrP in the earliest vertebrates, sharks, skates and fishes, is reviewed and the calciotropic functions of PTHrP are addressed more specifically in fishes. Parathyroid hormone-related p...

journal_title：General and comparative endocrinology

authors： Abbink W,Flik G

更新日期：2007-06-01 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：:Myostatin (GDF-8) inhibits the activation, proliferation, and differentiation of myogenic satellite cells. The relative importance of this growth factor is demonstrated in myostatin-null mice and cattle possessing defective myostatin genes. These defects result in greatly enhanced musculature. In the present study, th...

journal_title：General and comparative endocrinology

authors： McFarland DC,Velleman SG,Pesall JE,Liu C

更新日期：2007-05-01 00:00:00

abstract：:The phenomenon of musth is a very stressful event, both behaviorally and physiologically. An ACTH stimulation test was conducted in four adult Asian bull elephants to investigate the possibility that the classical hypothalamic-pituitary-adrenal (HPA) axis is active during musth, resulting in an increase in adrenally p...

journal_title：General and comparative endocrinology

authors： Yon L,Kanchanapangka S,Chaiyabutr N,Stanczyk F,Meepan S,Lasley B

更新日期：2007-05-01 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：:Despite their abundance and their enormous significance for various ecological processes, endocrine systems of microcrustaceans have been poorly investigated. Here, we used a highly sensitive radioimmunoassay (RIA) to determine free and conjugated ecdysteroid levels in whole-body extracts of adult Daphnia magna during...

journal_title：General and comparative endocrinology

authors： Martin-Creuzburg D,Westerlund SA,Hoffmann KH

更新日期：2007-03-01 00:00:00

abstract：:We isolated and cloned full-length cDNAs of transthyretin (TTR) from 2 genera of lamprey, Petromyzon marinus and Lampetra appendix. These sequences represent the first report of TTR sequences in vertebrates basal to teleost fishes. The deduced amino acid sequence of lamprey TTR cDNAs showed 36-47% identity with those ...

journal_title：General and comparative endocrinology

authors： Manzon RG,Neuls TM,Manzon LA

更新日期：2007-03-01 00:00:00

abstract：:Seabird productivity is shaped by marine resource availability. We examined the link between seabird productivity and an indirect measure of food availability: baseline plasma corticosterone. We predicted low productivity would coincide with elevated baseline corticosterone levels in Black-legged Kittiwakes (Rissa tri...

journal_title：General and comparative endocrinology

authors： Buck CL,O'Reilly KM,Kildaw SD

更新日期：2007-02-01 00:00:00

abstract：:Like IGF-I, progranulin (pgrn) is a growth factor involved in tumorigenesis and wound healing. We report here the identification and characterization of pgrn cDNA in tilapia and the regulation of its expression by growth hormone (GH). The tilapia pgrn cDNA was cloned by RT-PCR amplification, using gene specific oligon...

journal_title：General and comparative endocrinology

authors： Chen MH,Li YH,Chang Y,Hu SY,Gong HY,Lin GH,Chen TT,Wu JL

更新日期：2007-01-15 00:00:00

abstract：:The golden rabbitfish Siganus guttatus is a reef fish with a restricted lunar-synchronized spawning rhythmicity and releases gametes simultaneously around the first quarter moon period during the spawning season. In order to understand the molecular aspects of the "circa" rhythms in this species, the full-length melat...

journal_title：General and comparative endocrinology

authors： Park YJ,Park JG,Hiyakawa N,Lee YD,Kim SJ,Takemura A

更新日期：2007-01-15 00:00:00

abstract：:Endocrinological research on wild animals inhabiting remote areas has been hampered by the need to store plasma samples at subzero temperatures. In an attempt to remedy this logistical issue, we here investigate the use of ethanol as an alternative to freezing for the preservation of steroid and indoleamine hormones i...

journal_title：General and comparative endocrinology

authors： Goymann W,Schwabl I,Trappschuh M,Hau M

更新日期：2007-01-15 00:00:00

abstract：:The G-protein-coupled receptor 54 (muGPR54) cDNA was cloned from the brain of the grey mullet, and its expression level, as well as those of the gonadotropin-releasing hormones (GnRH1, GnRH2, GnRH3) and dopamine receptor D2 (drd2), in the brain, pituitary and ovary of pubertal fish (early, intermediate, advanced) were...

journal_title：General and comparative endocrinology

authors： Nocillado JN,Levavi-Sivan B,Carrick F,Elizur A

更新日期：2007-01-15 00:00:00

abstract：:Identification of orthologs of vertebrate neuropeptides and hypothalamic hormones in the neural complex of ascidians suggests integral roles of the ascidian neural complex in the endocrine system. In the present study, we investigated endocrine-related genes expressed in the neural complex of Ciona intestinalis. Compr...

journal_title：General and comparative endocrinology

authors： Sekiguchi T,Kawashima T,Satou Y,Satoh N

更新日期：2007-01-15 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：:Although neuropeptide Y (NPY) has been known to influence the release of luteinizing hormone (LH) and growth hormone (GH) from the pituitary gland of teleosts, the NPY receptor subtypes involved in the regulatory processes have not been fully defined. An attempt has been made to study the involvement of NPY Y1 recepto...

journal_title：General and comparative endocrinology

authors： Mazumdar M,Lal B,Sakharkar AJ,Deshmukh M,Singru PS,Subhedar N

更新日期：2006-11-01 00:00:00

abstract：:PCB 77 is a dioxin-like PCB that has been shown to reduce circulating thyroid hormone (TH) levels. This may be an important factor contributing to its neurotoxicity, since THs are essential for normal brain development. In this study, we investigated the changes in TH activating and inactivating iodothyronine deiodina...

journal_title：General and comparative endocrinology

authors： Beck V,Roelens SA,Darras VM

更新日期：2006-09-15 00:00:00

abstract：:Effects of fasting on the growth hormone (GH)--growth hormone receptor (GHR)-insulin-like growth factor-I (IGF-I) axis were characterized in seawater-acclimated tilapia (Oreochromis mossambicus). Fasting for 4 weeks resulted in significant reductions in body weight and specific growth rate. Plasma GH and pituitary GH ...

journal_title：General and comparative endocrinology

authors： Fox BK,Riley LG,Hirano T,Grau EG

更新日期：2006-09-15 00:00:00

abstract：:Sex steroid hormones have been widely detected in molluscs, and experiments have shown the importance of sex steroids in sex determination, gonadal tissue maturation and gametogenesis. Nevertheless, the signaling pathways of sex steroids in invertebrates have not yet been elucidated. In order to gain insights into the...

journal_title：General and comparative endocrinology

authors： Kajiwara M,Kuraku S,Kurokawa T,Kato K,Toda S,Hirose H,Takahashi S,Shibata Y,Iguchi T,Matsumoto T,Miyata T,Miura T,Takahashi Y

更新日期：2006-09-15 00:00:00

abstract：:Cholecystokinin (CCK) and gastrin-releasing peptide (GRP) are gastrointestinal peptides thought to be important regulators of intake and digestion of food in vertebrates. In this study, pre- and postprandial plasma levels of CCK and GRP were measured in rainbow trout (Oncorhynchus mykiss) by the establishment of homol...

journal_title：General and comparative endocrinology

authors： Jönsson E,Forsman A,Einarsdottir IE,Egnér B,Ruohonen K,Björnsson BT

更新日期：2006-09-01 00:00:00

abstract：:Birds may react to the presence of humans with an immediate primary behavioural reaction and with physiological responses, such as the activation of the hypothalamo-pituitary-adrenal axis. This study investigates the suite of behavioural and adrenocortical responses to the presence of humans and to handling in two sub...

journal_title：General and comparative endocrinology

authors： Müller C,Jenni-Eiermann S,Blondel J,Perret P,Caro SP,Lambrechts M,Jenni L

更新日期：2006-09-01 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：:In teleost fish, the predominant brain form of cytochrome P450 aromatase (P450aromB) is a neural marker of estrogen effect, and an entry point for studying the role of hormonal and environmental estrogens on neurodevelopment and neuroplasticity. As part of a project using zebrafish to investigate these issues, we deve...

journal_title：General and comparative endocrinology

authors： Sawyer SJ,Gerstner KA,Callard GV

更新日期：2006-06-01 00:00:00