Abstract：
:Plasma prolactin (PRL) and vitellogenin (VTG) concentrations were determined during the annual reproductive cycle of the newt Triturus carnifex Laur. Plasma PRL was measured by a radioimmunoassay using purified newt (Cynops pyrrogaster) PRL as standard and radioligand and its antibodies. Using ELISA, plasma VTG titers were related to ovarian weight. The trends in PRL differed in the two sexes: the PRL changes seemed to be related with vitellogenic processes in the female, whereas they were more related to reproductive behavior in the male.
journal_name
Gen Comp Endocrinoljournal_title
General and comparative endocrinologyauthors
Mosconi G,Yamamoto K,Kikuyama S,Carnevali O,Mancuso A,Vellano Cdoi
10.1006/gcen.1994.1132subject
Has Abstractpub_date
1994-09-01 00:00:00pages
342-9issue
3eissn
0016-6480issn
1095-6840pii
S0016-6480(84)71132-4journal_volume
95pub_type
杂志文章abstract：:Vitamin D binding protein (DBP) was isolated from the plasma of the snapping turtle, Chelydra serpentina (mixed sex adult), and compared with the previously characterized dual function binding plasma protein that binds both thyroxine (T4) and vitamin D (tsTDBP) in an emydid turtle, Trachemys scripta. Purification of C...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1996.0182
更新日期：1996-12-01 00:00:00
abstract：:Precise regulation of hormone secretion from endocrine cells is of critical importance for the maintenance of animal homeostasis. This is partly enabled through the ability of endocrine cells to adapt dynamically their secretory activity to the physiological demands through complex functional changes. Such a secretory...
journal_title：General and comparative endocrinology
pub_type： 杂志文章,评审
doi：10.1006/gcen.2002.7778
更新日期：2002-03-01 00:00:00
abstract：:Blood cells of male and female rainbow trout showed 17 beta-hydroxysteroid dehydrogenase (17 beta HSD) activity in vitro, reducing 11 beta-hydroxyandrostenedione and 11-ketoandrostenedione (OA) to 11 beta-hydroxytestosterone and 11-ketotestosterone (OT), respectively. Enzyme activity did not vary with gonadal developm...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(91)90184-8
更新日期：1991-05-01 00:00:00
abstract：:Receptors for vasoactive intestinal peptide (VIP) and pituitary adenylate cyclase-activating polypeptide (PACAP) in turkey cerebral cortex were characterized using two approaches: (1) in vitro radioreceptor binding of [125I]-VIP, and (2) effects of peptides from the PACAP/VIP/secretin family on cyclic AMP formation. T...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2004.03.007
更新日期：2004-06-01 00:00:00
abstract：:The developmental hypothesis proposes that the adrenocortical response to stress during postnatal development in birds should not develop when the benefits of elevated corticosterone do not outweigh the deleterious effects on growth and development. We tested three predictions developed from this hypothesis in free-li...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2010.06.009
更新日期：2010-09-15 00:00:00
abstract：:To examine the reproductive endocrinology of a large pleuronectiform fish, barfin flounder, Verasper moseri, a promising candidate for aquaculture and resource enhancement in northern Japan due to its high commercial value, three gonadotropin-releasing hormones (GnRHs) in the brain was identified by isolation of their...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/s0016-6480(02)00008-4
更新日期：2002-05-01 00:00:00
abstract：:Only recently have the cardiac actions of parathyroid hormone and its N-terminal (1-34) fragment (bPTH(1-34] been examined. Parathyroid hormone was found to exert a positive chronotropic effect on the heart tissue of several mammals and one amphibian in vivo and/or in vitro. The purpose of the present study was to exa...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(84)90037-6
更新日期：1984-11-01 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
pub_type： 杂志文章
doi：10.1016/j.ygcen.2006.04.003
更新日期：2006-09-15 00:00:00
abstract：:The control of oocyte growth and its final maturation is multifactorial and involves a number of hypothalamic, hypophyseal, and peripheral hormones. In this study, we investigated the direct actions of the gonadotropin-releasing hormone (GnRH) and the gonadotropin-inhibitory hormone (GnIH), which are expressed in the ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2020.113619
更新日期：2020-12-01 00:00:00
abstract：:This study aimed at investigating the role of sexual steroids in the regulation of the expression of the single aromatase gene and steroid receptor subtypes in the brain-pituitary-ovarian axis of the Japanese eel. Unlike other teleosts, which possess duplicated genes for aromatase, cyp19a1a and cyp19a1b, expressed in ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2011.11.005
更新日期：2012-01-01 00:00:00
abstract：:Farnesylacetone, a molecule isolated from the androgenic glands of Carcinus maenas, inhibits vitellogenesis in the ovaries. Here the effect of farnesylacetone on protein and RNA synthesis in cultured organs is described. Both leucine and uridine incorporation in ovaries were inhibited with low concentration of farnesy...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(84)90163-1
更新日期：1984-06-01 00:00:00
abstract：:It is known that in goldfish Carassius auratus, a non-sex changing fish, prostaglandin (PG) treatment can induce female-typical sex behavior in males, and androgen treatment can induce male-typical sex behavior in females. These facts suggest that goldfish have a sexually bipotential brain even after attaining sexual ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2012.08.022
更新日期：2013-01-15 00:00:00
abstract：:The possum is a seasonally breeding marsupial which gives birth in Queensland from March through to September. To ascertain whether this seasonality in breeding is manifest in the male reproductive system, body weight and plasma testosterone concentrations were examined in five possums. Plasma testosterone concentrati...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(86)90087-0
更新日期：1986-04-01 00:00:00
abstract：:Effects of Al on estradiol-induced vitellogenin (VTG) induction were electrophoretically examined in primary hepatocyte cultures in rainbow trout. Hepatocytes were precultured for 2 days and then estradiol-17 beta (E2, 6 x 10(-6) M) and Al (10(-6)-10(-4) M) were added to the incubation medium. The hepatocytes were cul...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1997.6996
更新日期：1998-01-01 00:00:00
abstract：:Ovaprim (OVP) is used as an effective spawning inducer for artificial breeding of fishes and contains a salmon gonadotropin-releasing hormone analogue and a dopamine receptor-2 antagonist, domperidone. Previously, we have shown that vasotocin (VT) stimulates ovarian final oocyte maturation, hydration, and ovulation th...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2013.11.009
更新日期：2014-01-01 00:00:00
abstract：:Plasma levels of testosterone and corticosterone were measured in free-living male bush warblers captured on their breeding ground at different times of the breeding season. Their territoriality was also estimated from their singing response to song playbacks. The pattern of change detected in the levels of plasma tes...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1999.7381
更新日期：1999-12-01 00:00:00
abstract：:Pineal photoreceptor cells produce the neurohormone melatonin, a major "Zeitgeber" of the organism. This compound is involved in the control of development, growth, sexual maturation, and seasonal reproductive cycles. The present study reports that the photosensitive pineal organ and the retina of the trout express a ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1994.1008
更新日期：1994-01-01 00:00:00
abstract：:Many vertebrates have more than one molecular form of gonadotropin-releasing hormone (GnRH) present in brain. In all cases documented to date, GnRH neurons located in the forebrain are critical players in the brain-pituitary-gonadal feedback axis although the details of how steroids regulate GnRH remain elusive. The f...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1998.7135
更新日期：1998-12-01 00:00:00
abstract：:This study directly tested the hypothesis that 17 alpha,20 beta-dihydroxy-4-pregnen-3-one (17,20 beta-P) is a goldfish preovulatory pheromone (pheromone released at peak levels during oocyte final maturation) which increases blood gonadotropin (GtH) and milt volume in males. During spontaneous ovulation, GtH and 17,20...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(89)90008-7
更新日期：1989-07-01 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
pub_type： 杂志文章
doi：10.1016/j.ygcen.2016.05.005
更新日期：2016-07-01 00:00:00
abstract：:We demonstrated the presence of specific binding sites for bullfrog luteinizing hormone (LH) and follicle-stimulating hormone (FSH) in a testicular crude plasma membrane fraction of the bullfrog, Rana catesbeiana. The equilibrium analysis of the binding showed that a straight line was fitted to the Scatchard plot of L...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(86)90207-8
更新日期：1986-02-01 00:00:00
abstract：:Neurotransmitters such as serotonin (5-hydroxytryptamine; 5-HT) in the central nervous system regulate diverse physiological functions, including reproduction, feeding, learning, and memory, in diverse animal phyla. 5-HT and the 5-HT1 subtype receptor play important roles in sexual maturation and in the initiation of ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2019.03.001
更新日期：2019-05-15 00:00:00
abstract：:Since an extrapancreatic source of insulin has been postulated in the chick embryo, insulin was sought by immunohistochemistry in the embryo before and after development of the pancreas and other tissues. Using for the first time an antiserum specific for chicken insulin, localization of insulin was investigated in wh...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(89)90102-0
更新日期：1989-02-01 00:00:00
abstract：:The present study in seasonally breeding spotted snakehead Channa punctatus, for the first time in nonmammalian vertebrates, demonstrated correlation between reproductive phase-dependent testicular expression of ligand Jag1/receptor Notch1 and spermatogenic events. Testicular transcriptome sequencing data from our ear...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2018.05.014
更新日期：2018-09-15 00:00:00
abstract：:Tadpoles of Rana catesbeiana at TK stages X-XII, about 9 months old, were laparotomized, and the males were implanted intraperitoneally with silastic tubes containing estradiol (E2) for various periods. Male tadpoles implanted with empty tubes served as the controls. Histology, secretions of E2, and testosterone (T) i...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1996.0073
更新日期：1996-06-01 00:00:00
abstract：:Reverse-phase HPLC employing five different solvent systems was used to determine the 125I-labeled products formed in rainbow trout by in vitro incubation at 12 degrees of the hepatic microsome fraction with L-thyroxine (T4) labeled with 125I in the outer phenyl ring. Trout were starved for 2 weeks or fed a 2% ration....
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(92)90081-t
更新日期：1992-03-01 00:00:00
abstract：:Age-related changes in the concentration of factors like TGF-1β, DHEA-S and IGF-1 may increase the risk of disease and illnesses in advanced life. A better understanding of these changes would aid in the development of more appropriate treatments and/or preventative care for many conditions associated with age. Due to...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2013.10.004
更新日期：2014-01-01 00:00:00
abstract：:The effect of a gonadotropin-releasing hormone analog (GnRHA, HOE766) was studied in hypophysectomized elasmobranch fish Torpedo marmorata and T. ocellata. In addition, estradiol (E2) effects were studied in intact and hypophysectomized (HPX) animals. Plasma androgen concentrations were measured 2 or 6 hr after GnRHA ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(89)90169-x
更新日期：1989-09-01 00:00:00
abstract：:The aim of the present study was to determine the relationship between seasonal variation in levels of insulin, cortisol, and corticosterone and body mass in a natural population of golden-mantled ground squirrels (Spermophilus saturatus) over the active season, from April to August. The body mass of females is at an ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1994.1189
更新日期：1994-12-01 00:00:00
abstract：:Experimental data demonstrated the negative impact of maternal protein malnutrition (MPM) on rat prostate development, but the mechanism behind the impairment of prostate growth has not been well understood. Male Sprague Dawley rats, borned to dams fed a normal protein diet (CTR group, 17% protein diet), were compared...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2016.12.016
更新日期：2017-05-15 00:00:00
