Abstract：
:In the present study, we have localized for the first time beta-endorphin (beta-EP)-like material in the adult and larval urodele and anuran tissues using immunohistochemical techniques. In the adult Notophthalmus viridescens and Ambystoma mexicanum, strong immunoreactivity to beta-EP antisera was observed in the region of the intermediate lobe, the latter fluorescing as a discrete body. The fluorescence was confined to the periphery of the cells, while the nuclei and the immediately surrounding cytoplasmic regions of the cells remained unstained. A few scattered cells in the anterior pituitary gland as well as the tracts in the posterior lobe also exhibited positive staining, although not as strong as the intermediate lobe. In the larval urodele, A. maculatum, beta-EP-like material was localized for the first time in the sensory ganglia and their emerging nerve fibers, in the Leydig cells of the skin, as well as in a few discrete cells scattered among stomach epithelial cells. In addition to the above, immunoreactivity to beta-EP antisera was observed in the cellular intermediate part of the neurointermediate lobe of the pituitary gland in young Xenopus laevis, the neural part of the lobe remaining nonreactive.
journal_name
Gen Comp Endocrinoljournal_title
General and comparative endocrinologyauthors
Vethamany-Globus Sdoi
10.1016/0016-6480(89)90080-4subject
Has Abstractpub_date
1989-08-01 00:00:00pages
271-9issue
2eissn
0016-6480issn
1095-6840journal_volume
75pub_type
杂志文章abstract：:Isospecific injections of intercerebral commissure (COM) extracts of L. stagnalis, L. palustris, and L. ovata (Lymnaeidae) and of extracts of COM/mediodorsal bodies complexes (COM/DB) of Bulinus truncatus (Bulinidae) and Biomphalaria glabrata (Planorbidae) induced oviposition in a high percentage of the experimental s...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(83)90164-8
更新日期：1983-10-01 00:00:00
abstract：:The role of the pituitary in regulating interrenal activity in coho salmon (Oncorhynchus kisutch) was examined using short- (1 week) or long- (10 week) term hypophysectomized (Hx) animals. In experiments in which Hx animals were injected with ovine growth hormone (oGH), triiodothyronine, or vehicle, plasma cortisol wa...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1993.1179
更新日期：1993-12-01 00:00:00
abstract：:The role of ovarian hormones in the expression of parental behavior and in the regulation of LH secretion was investigated in incubating commercial meat-type hens. After ovariectomy, incubating hens continued to incubate eggs normally and brooded day-old chicks given to replace eggs, in a manner similar to sham-ovarie...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1996.0013
更新日期：1996-01-01 00:00:00
abstract：:During normal pupal-adult development, programmed cell death of the prothoracic gland of Manduca sexta proceeds via apoptosis. By employing the DNA laddering technique, the earliest sign of DNA fragmentation in the cells comprising the gland occurred on Day 5 of pupal-adult development and DNA fragmentation peaked 1 d...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1997.7022
更新日期：1998-02-01 00:00:00
abstract：:Ghrelin, a peptide hormone produced by the stomach in mammals, stimulates growth hormone release and food intake. Recently, ghrelin was identified and characterized in chicken proventriculus and shown to stimulate growth hormone release but inhibit feed intake. The purpose of this work was to identify and further char...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2005.09.013
更新日期：2006-02-01 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
pub_type： 杂志文章
doi：10.1016/j.ygcen.2006.03.005
更新日期：2006-09-01 00:00:00
abstract：:The effects of starvation and feeding on the release of bombyxin, a peptide of insulin superfamily in insects, from the larval brain of the silkworm Bombyx mori were investigated. Following starvation, the bombyxin titer in the hemolymph of larvae decreased, whereas its content in the brain increased. On the other han...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1999.7438
更新日期：2000-06-01 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
pub_type： 杂志文章
doi：10.1016/j.ygcen.2006.08.011
更新日期：2007-01-15 00:00:00
abstract：:Thyroidectomy of starlings (Sturnus vulgaris) prevents the decrease in hypothalamic gonadotrophin-releasing hormone (GnRH) which normally occurs at the onset of photorefractoriness. To extend this observation to another species, changes in testicular mass, bill colour, moult, and hypothalamic GnRH content were monitor...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1998.7065
更新日期：1998-05-01 00:00:00
abstract：:In mammals, downstream function of the nuclear progestin receptor (PGR) can be differentially regulated in each target tissue by altering the expression levels of PGR mRNA variants. Such PGR isoforms have also been identified in birds and reptiles, but not in non-amniote vertebrates. Based upon extensive phylogenetic,...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2012.11.015
更新日期：2013-02-01 00:00:00
abstract：:The neurohypophysial hormones of the eastern gray kangaroo (Macropus giganteus) have been isolated through molecular sieving and paper chromatoelectrophoresis. One oxytocin-like and two vasopressin-like peptides have been found. These peptides have been characterized by amino acid analysis. Mesotocin ([Ile8]-oxytocin)...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(83)90008-4
更新日期：1983-01-01 00:00:00
abstract：:Skin pigmentation pattern is a species-specific characteristic that depends on the number and the spatial combination of several types of chromatophores. This feature can change during life, for example in the metamorphosis or reproductive cycle, or as a response to biotic and/or abiotic environmental cues (nutrition,...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2020.113662
更新日期：2021-01-15 00:00:00
abstract：:Comparative hormone studies can reveal how physiology underlies life history variation. Here, we examined seasonal variation in plasma testosterone concentration between populations of male orange-crowned warblers (Vermivora celata) breeding in Fairbanks, Alaska (V. c. celata) and on Santa Catalina Island, California ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2010.04.019
更新日期：2010-09-15 00:00:00
abstract：:In vertebrates, the peptide cholecystokinin (CCK) is one of the most important neuroregulatory digestive hormones. CCK acts via CCK receptors that are classified into two subtypes, CCK-1 receptor (CCK-1R; formally CCK-A) and CCK-2 receptor (formally CCK-B). In particular, the CCK-1R is involved in digestion and is reg...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2013.02.003
更新日期：2013-06-01 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
pub_type： 杂志文章
doi：10.1016/0016-6480(90)90115-3
更新日期：1990-08-01 00:00:00
abstract：:Melanin-concentrating hormone (MCH) mainly regulates feeding in mammals and pigmentation in teleosts. It acts via two G-protein-coupled receptors, MCH receptor 1 (MCHR1) and MCHR2. Although many studies exploring the MCH system in teleosts and mammals have been carried out, studies on other organisms are limited. In t...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2014.03.005
更新日期：2015-02-01 00:00:00
abstract：:The secretory response of the nasal salt gland of the north African agamid lizard Uromastix acanthinurus to injections of 1 M KCl and NaCl is correlated with changes in circulating levels of the corticosteroids aldosterone and corticosterone. KCl loading led to a progressive rise in plasma aldosterone levels, and NaCl...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(84)90186-2
更新日期：1984-05-01 00:00:00
abstract：:Genetic sex determination leads to gonadal differentiation and ultimately the differences between the sexes in steroid hormone secretion. Gonadal steroidogenesis is critical for the development of a sexually dimorphic phenotype and adult reproductive function. Control of gonadal development and steroidogenesis is unde...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/s0016-6480(02)00019-9
更新日期：2002-06-01 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
pub_type： 杂志文章
doi：10.1016/j.ygcen.2010.12.018
更新日期：2011-03-01 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
pub_type： 杂志文章
doi：10.1016/j.ygcen.2010.11.027
更新日期：2011-02-01 00:00:00
abstract：:Despite its occurrence in most vertebrate species, the function of the hypophysial pars tuberalis (PT) remains obscure. Recent immunocytochemical studies have demonstrated the presence of hormone-containing cells in the few species studied. In the present study the secretory cell composition of the PT was characterize...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(84)90043-1
更新日期：1984-11-01 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
pub_type： 杂志文章,评审
doi：10.1016/j.ygcen.2007.04.005
更新日期：2007-08-01 00:00:00
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
pub_type： 杂志文章
doi：10.1016/0016-6480(83)90221-6
更新日期：1983-05-01 00:00:00
abstract：:Profiles of testosterone, 11-ketotestosterone, androstenedione, and estradiol were determined by RIA, and immunocytochemical techniques were employed to identify gonadotropin (GTH) I and II and gonadotropin releasing hormone (GnRH) in monosex and mixed sex populations of rainbow trout from 1 to 126 days postfertilizat...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1996.0083
更新日期：1996-06-01 00:00:00
abstract：:Several of the song control nuclei of songbirds, including HVc (higher vocal center) and Area X, contain melatonin receptor (MelR). In laboratory-housed male starlings, the densities of MelR in Area X change markedly according to reproductive state. MelR are down-regulated when starlings are photostimulated (in full b...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/s0016-6480(03)00261-2
更新日期：2003-11-01 00:00:00
abstract：:Application of alpha-MSH immunohistochemistry to the brain of elasmobranchs (Scyliorhinus torazame and Etmopterus brachyurus) demonstrated a marked species difference concerning the distribution of the alpha-MSH-like molecule in the brain. In S. torazame, alpha-MSH-like immunoreactive cells were present in the hypotha...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.2001.7628
更新日期：2001-06-01 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
pub_type： 杂志文章
doi：10.1016/j.ygcen.2007.05.016
更新日期：2008-01-01 00:00:00
abstract：:The chromatographic profile of ecdysteroids (Ecds) from the midgut gland (MG) of juvenile female lobsters, Homarus americanus, was examined using high-performance liquid chromatography (HPLC) and radioimmunoassay (RIA) over four stages of the molt cycle. Upon initial examination, highly polar Ecd conjugates appeared t...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(92)90013-a
更新日期：1992-02-01 00:00:00
abstract：:The occurrence of myoendocrine-like cells investing the ampullar draining region of Malpighian tubules and neighboring midgut and hindgut regions of the ant Formica polyctena is reported. These striated muscle cells show small electron-dense endocrine-like granules (130 +/- 0.95 nm) in addition to myofilaments and ord...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1994.1110
更新日期：1994-07-01 00:00:00
abstract：:The effect of aldosterone and corticosterone on T3 binding to the nuclear fraction of the tail fin of bullfrog tadpoles was investigated in vitro. Both corticoids (10(-7) - 10(-5) M) added to the incubation medium increased T3 binding in a dose-dependent manner. The aldosterone-induced increase in T3-binding was block...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(83)90122-3
更新日期：1983-11-01 00:00:00
