Abstract：
:An in vitro investigation has clarified the neuroendocrine mechanism responsible for the differentiation of the female gonad in the protandrous hermaphrodite Crepidula fornicata. The male gonads were used as target organs; in some experiments they were brought to a uniform resting state by prior decerebration of donor animals. When isolated in culture, most of the male gonad degenerates, leaving only the stem cells lining the wall of the acini. No ovarian autodifferentiation has been observed. A masculinizing factor, released by the nervous ganglia during the male phase, controls spermatogonial mitosis and maintenance of male differentiation. A feminizing factor, secreted by the nervous ganglia during sex inversion and the female phase and present in the hemolymph, initiates oogonial mitosis and female differentiation in the male phase gonad.
journal_name
Gen Comp Endocrinoljournal_title
General and comparative endocrinologyauthors
Feral C,Le Gall S,Martin MC,Lengronne Cdoi
10.1016/0016-6480(87)90129-8subject
Has Abstractpub_date
1987-03-01 00:00:00pages
432-8issue
3eissn
0016-6480issn
1095-6840journal_volume
65pub_type
杂志文章abstract：:The hypothalamic-pituitary-adrenal (HPA) axis releases glucocorticoids (GCs), or stress hormones, during the vertebrate stress response. GCs can both enhance and suppress the immune system depending on whether the experienced stressor is acute or chronic and what aspect of immune function is measured. More research is...
journal_title：General and comparative endocrinology
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更新日期：2013-11-01 00:00:00
abstract：:In the present study, four full-length cDNAs of somatostatin receptor (sstr) were cloned from the forebrain and pituitary of red-spotted grouper. The four full-length cDNAs were designated 2292, 1522, 1873 and 1789 bp and identified as sstr1, sstr2, sstr3, and sstr5 by BLAST analysis; the corresponding sizes of the op...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2019.01.007
更新日期：2019-04-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(90)90035-k
更新日期：1990-06-01 00:00:00
abstract：:Plasma concentrations of growth hormone (GH) were decreased following the intravenous administration of morphine sulfate. Maximum inhibition of GH secretion was observed 40 min after morphine sulfate challenge. At this time, doses of morphine sulfate (at 5 mg and 50 mg/kg) reduced the GH concentrations by 86 and 90%, ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(87)90219-x
更新日期：1987-01-01 00:00:00
abstract：:This study investigates the effects of exogenous thyroxine (T4) on running endurance, tissue masses, and the activities of citrate synthase (CS), pyruvate kinase (PK), cytosolic alpha-glycerophosphate dehydrogenase (alpha-GPDH), and beta-hydroxyacyl Coenzyme A dehydrogenase (HOAD) in Sceloporus undulatus (eastern fenc...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(91)90132-p
更新日期：1991-01-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2009.08.008
更新日期：2010-03-01 00:00:00
abstract：:It has been suggested that the functional diversity of growth hormone (GH) is related to its molecular complexity. Here we report a characterization of charge and mass variants of chicken growth hormone (cGH) through a variety of electrophoretic systems [nondenaturing (ND-PAGE), denaturing (SDS-PAGE), under reducing a...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(90)90148-f
更新日期：1990-10-01 00:00:00
abstract：:A triacetyl form of α-melanocyte-stimulating hormone (MSH) was found in carp (Cyprinus carpio) and goldfish (Carassius auratus), by selective detection of mass profile for cell secretory granules using direct tissue matrix-assisted laser desorption ionization with time-of-flight mass spectrometry (MALDI-TOF MS) analys...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2011.11.009
更新日期：2012-01-15 00:00:00
abstract：:Fishes have evolved physiological mechanisms to exhibit stress response, where hormonal signals interact with an array of ion transporters and regulate homeostasis. As major ion transport regulators in fish, cortisol and thyroid hormones have been shown to interact and fine-tune the stress response. Likewise, in fishe...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2016.11.009
更新日期：2017-09-15 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1995.1090
更新日期：1995-07-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2011.09.007
更新日期：2011-12-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1993.1019
更新日期：1993-01-01 00:00:00
abstract：:More and more evidence indicates that the insulin-like androgenic gland hormone (IAG) plays an important role in male sexual differentiation in crustaceans. In the present study, two IAG isoforms (Fc-IAG1 and Fc-IAG2) were identified from the penaeid shrimp Fenneropenaeus chinensis. Sequence analysis of IAG gene (Fc-I...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2012.04.010
更新日期：2012-06-01 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
pub_type： 杂志文章
doi：10.1016/j.ygcen.2006.02.012
更新日期：2006-09-01 00:00:00
abstract：:Red deer stags have a seasonal pattern of growth, alternating between periods of summer weight gain and winter weight loss that are influenced by photoperiod and by exogenous melatonin. A seasonal pattern of plasma insulin-like growth factor 1, also influenced by photoperiod, underlies the seasonal growth pattern. The...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(92)90156-e
更新日期：1992-07-01 00:00:00
abstract：:By mapping the distribution of cholecystokinin (CCK) receptor types onto an established phylogenetic hypothesis of vertebrate relationships, we tested two hypothesis about the evolution of CCK receptors: (1) A single CCK receptor type, CCK-X, is the ancestral receptor, while CCK-A and CCK-B receptors represent derived...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1996.0047
更新日期：1996-04-01 00:00:00
abstract：:Ovaries from the leopard frog, Rana pipiens, and bullfrog, R. catesbeiana, were used to study potential direct extrapituitary effects of gonadotropin-releasing hormone (GnRH). GnRH alone did not alter steroid secretion from ovaries in either species. Ovarian fragments containing mature follicles from R. pipiens were i...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(85)90309-0
更新日期：1985-11-01 00:00:00
abstract：:Considerable research has been conducted on the interrelationships of the steroid hormone testosterone and reproductive behavior in seasonally breeding birds. In species in which males provide paternal care, males experience a peak in testosterone secretion that coincides with territory establishment and pair bonding,...
journal_title：General and comparative endocrinology
pub_type： 杂志文章,评审
doi：10.1016/j.ygcen.2008.05.009
更新日期：2008-07-01 00:00:00
abstract：:This paper presents a first-time report on the localization, structure and seasonal secretory activity of the Y-organ of a grapsid brachyuran crab (Metopograpsus messor). Having exhibited discrete seasonality with reference to the programming of molt and reproduction, this brachyuran crab has offered us an excellent m...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2013.11.016
更新日期：2014-01-15 00:00:00
abstract：:Plasma concentrations and stored levels of the neuroendocrine peptides arginine vasotocin (AVT) and urotensin II (UII) were measured in the euryhaline flounder (Platichthys flesus) following the acute hypo-osmotic challenge of direct seawater (SW) to fresh water (FW) transfer. Hormone measures, plasma osmolality, and ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.2001.7736
更新日期：2002-01-01 00:00:00
abstract：:In gravid female goldfish held at 10-12 degrees, a single injection of des Gly10,[D-Ala6]luteinizing hormone-releasing hormone ethylamide (LHRH-A), or 2 injections of LHRH-A given 12 hr apart, increased serum gonadotropin (GtH) concentrations, but did not stimulate germinal vesicle migration or ovulation. Injection of...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(83)90155-7
更新日期：1983-10-01 00:00:00
abstract：:The activity of the enzyme steroid 5 alpha-reductase in Harderian glands of adult syrian hamsters was assessed by measuring the conversion of testosterone (T) to 5 alpha-dihydrotestosterone (DHT). The optimal conditions for this reaction were determined in vitro using whole gland homogenates and [3H]testosterone as su...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1994.1185
更新日期：1994-11-01 00:00:00
abstract：:We analyzed the participation of sympathetic ovarian innervation in the prepubertal female guinea pig on regulation of compensatory ovarian hypertrophy (COH) and compensatory ovulation at puberty. The COH of the left ovary was significantly higher that of the right one (left ovary: 41.5+/-5.2 vs. 27.5+/-5.6%, p<0.05, ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/s0016-6480(02)00061-8
更新日期：2002-07-01 00:00:00
abstract：:Insect kinins modulate aspects of diuresis, digestion, development, and sugar taste perception in tarsi and labellar sensilla in mosquitoes. They are, however, subject to rapid biological degradation by endogenous invertebrate peptidases. A series of α-aminoisobutyric (Aib) acid-containing insect kinin analogs incorpo...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2018.08.002
更新日期：2019-07-01 00:00:00
abstract：:The arginine vasotocin/vasopressin (AVT/AVP) and gonadotropin releasing hormone (GnRH) systems are known to control sexual behaviors and reproduction, respectively, in different vertebrate groups. However, a direct functional connection between these two neuroendocrine systems has not been demonstrated for any vertebr...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2015.07.013
更新日期：2016-01-01 00:00:00
abstract：:We developed and validated a noninvasive method to quantify fecal estrogens and progestins as a tool for monitoring long-term ovarian activity in free-ranging African elephants. The lag times between iv injection of [(3)H]estradiol and [(14)C]progesterone and peak excretion of radioactivity in urine and feces were app...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1996.0067
更新日期：1996-05-01 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
pub_type： 杂志文章
doi：10.1016/j.ygcen.2019.02.021
更新日期：2019-05-15 00:00:00
abstract：:Using combined nicotinamide adenine dinucleotide phosphate-diaphorase (NADPHd) histochemistry and salmon gonadotropin-releasing hormone (sGnRH) immunocytochemistry, it is reported for the first time that possible potential contacts occur between the nitric oxide (NO)- and the GnRH-containing neurons in the brain of a ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.2000.7541
更新日期：2000-10-01 00:00:00
abstract：:Androgens take part in the regulation of puberty and promote growth and development. They play their biological role by binding to a specific androgen receptor (AR). The aim of this study was to evaluate the expression of AR mRNA and protein in the pituitary and adrenal glands, to localize AR protein in luteinizing ho...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2015.03.001
更新日期：2015-06-01 00:00:00
abstract：:Molecular cloning of thyrotropin-releasing hormone receptors (TRHR) was performed in a teleost, the sockeye salmon (Oncorhynchus nerka). Four different TRHR cDNAs were cloned and named TRHR1, TRHR2a, TRHR2b and TRHR3 based on their similarity to known TRHR subtypes in vertebrates. Important residues for TRH binding we...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2011.07.011
更新日期：2011-11-01 00:00:00
