Abstract:
:To investigate the changes in the FSH receptor and the activin receptor during sexual maturation in rat testes, we examined the mRNA levels of the receptors by Northern blot analysis. With a full length rat activin receptor cRNA probe in this study, Northern blot analysis revealed two activin receptor mRNAs (6Kb and 3Kb) in testes. The large messenger (6Kb) was low on day 7, and gradually increased by day 35. On the other hand, the small messenger (3Kb) was low on day 7, began to increase on day 21, and had increased dramatically by day 35. Therefore, compared with our previous data, developmental changes in the mRNA of the activin receptor of male and female gonads showed certain differences. The expression of 3Kb activin receptor mRNA in rat testis may be relevant to the stimulated spermatogenesis in this period. 2.4Kb and 5.5Kb FSH receptor mRNA were revealed on day 7 and decreased to 80% on day 14 and remained at the same level. The Scatchard plots of FSH binding data showed that the binding affinities of testicular FSH were constant at each stage of development. Changes in the mRNA level in FSH receptor were followed by changes in the concentration of FSH receptor in testis. The rise in the plasma FSH level was concomitant with the decrease in the plasma inhibin level by day 14.
journal_name
Life Scijournal_title
Life sciencesauthors
Ito I,Minegishi T,Hasegawa Y,Shinozaki H,Nakamura K,Igarashi S,Nakamura M,Miyamoto K,Ibuki Ydoi
10.1016/0024-3205(93)90575-nsubject
Has Abstractpub_date
1993-01-01 00:00:00pages
1299-307issue
16eissn
0024-3205issn
1879-0631pii
0024-3205(93)90575-Njournal_volume
53pub_type
杂志文章相关文献
LIFE SCIENCES文献大全abstract::Respiring mitochondria represent the major source of superoxide production in most cells, and superoxide anions function as direct precursors of hydrogen peroxide formation within mitochondria. We use a lucigenen-derived chemiluminescence (LDCL) assay to test the hypothesis that intramitochondrial superoxide productio...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(02)01538-2
更新日期:2002-05-03 00:00:00
abstract::Significant elevation in plasma corticosterone of rats achieved by intraperitoneal (i.p.) administration of corticosterone (2.4 mg/kg) was associated with a rapid (2.5 min) and significant increase in hypothalamic histamine (HA) levels which persisted for 60 min. Midbrain and cortical HA concentrations were not affect...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(83)90115-7
更新日期:1983-03-07 00:00:00
abstract::The present study was performed to determine if the attenuated pressor response to vasopressin in conscious non-estrous female rats is due in part to an enhanced V2-like receptor vasodilator action. In male rats, infusion of vasopressin at a rate of 1 ng.min(-1).kg body weight-1 (wt) resulted in an increase in mean ar...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(96)00351-7
更新日期:1996-01-01 00:00:00
abstract::The risk of atherosclerosis (AS) ascends among post-menopausal women, while current hormone replacement therapy exerts several adverse effects. Alisol B 23-acetate (AB23A), a tetracyclic triterpenoid isolated from the rhizome of Alisma orientale, was reported to show multiple physiological activities, including regula...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2020.118030
更新日期:2020-10-01 00:00:00
abstract::The conversion of beta-carotene to retinal and the succeeding metabolic process of the retinal leading to production of retinol and retinyl esters are the prerequisite for the utilization of beta-carotene as a provitamin A. These processes are participated by beta-carotene cleavage enzyme, retinal reductase and retino...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(99)00311-2
更新日期:1999-01-01 00:00:00
abstract::Although peripheral actions have been shown for the brain-gut peptide, motilin, its localization in the CNS of mammals suggests some physiological role at this site. In the present experiments intracerebroventricular or intrathecal, but not peripheral, administrations of motilin produced a dose-related and naloxone re...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(84)90043-2
更新日期:1984-06-25 00:00:00
abstract::Diabetes Mellitus (DM) can produce an increase in the cardiac action potential duration and QT interval that can be associated with sudden death. These cardiac effects are due to a region-specific decrease in repolarizing outward K(+) currents. Some authors have suggested that the proarrhythmic effects of diabetes can...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2006.03.014
更新日期:2006-07-24 00:00:00
abstract:AIMS:The protein kinase C (PKC) family of enzymes has been implicated in cellular proliferation, differentiation, and apoptosis. However, the distribution of specific PKC isoforms with varying functions in normal and malignant human tissues remains to be determined. The objective of this study was to investigate the ex...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2009.03.007
更新日期:2009-05-22 00:00:00
abstract::Since hypertension may compromise the ability to withstand hypernatremic dehydration, we investigated the impact of two experimental models of hypertension and pharmacologic normalization of blood pressure on the tolerance to chronic hypernatremic dehydration. In DOCA-salt hypertensive animals and the spontaneously-hy...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(90)90450-6
更新日期:1990-01-01 00:00:00
abstract::Uncontrolled recreational drugs are proliferating in number and variety. Effects of long-term use are unknown, and regulation is problematic, as efforts to control one chemical often lead to several other structural analogs. Advanced analytical instrumentation and methods are continuing to be developed to identify dru...
journal_title:Life sciences
pub_type: 杂志文章,评审
doi:10.1016/j.lfs.2012.10.031
更新日期:2013-03-19 00:00:00
abstract::The effects of naloxone or thyrotropin releasing hormone (TRH) upon neurologic outcome were evaluated in gerbil models of cerebral ischemia. Following temporary bilateral carotid occlusion, hypotension was transiently reversed by these endorphin antagonists. However, neither drug altered time to awaken, time to death,...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(82)90419-2
更新日期:1982-07-26 00:00:00
abstract::The effect of cadmium (Cd2+) was studied in vitro on the flavokinase (ATP : riboflavin 5'-phosphotransferase, EC 2.7.1.26) activity purified from rat liver. Cadmium inhibited flavokinase activity in a concentration-dependent manner and the effect was completely reversed by increasing concentration of zinc (Zn2+), indi...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(97)00151-3
更新日期:1997-01-01 00:00:00
abstract::Endothelin-1 (ET-1) has been proposed as one of the possible mediators of the vasoconstriction seen following ischemia and reperfusion. We investigated the effect of ischemia and reperfusion on the contractile response of canine renal and iliac arteries to the dihydropyridine-type calcium channel agonist (+/-)Bay K 86...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(95)00267-a
更新日期:1995-01-01 00:00:00
abstract::Imidazole (IMI) (from 18.7 to 300 mg/Kg) i.p. injected in adult rats induced shaking, which was antagonized by both morphine (MOR) and haloperidol (HALO) but not by methysergide (MET). I.p. IMI pretreatment inhibited the penile erections (PE) and stretching and yawning (SY) typically elicited by N-n-propylnorapomorphi...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(85)90046-3
更新日期:1985-04-08 00:00:00
abstract::The role of FSH in inducing folliculogenesis is well established. Recently, the availability of pure FSH has led to a reevaluation of its role in the process of ovulation. Previously, these functions have been examined separately, usually with pregnant mares' serum gonadotropin (PMSG) followed by FSH for ovulation or ...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(93)90608-6
更新日期:1993-01-01 00:00:00
abstract::The pineal gland hormone melatonin is now considered an important neuroendocrine component of animal physiology. Although the functional status of melatonin has been well described for subhuman species, there is a paucity of data concerning the physiological role of this hormone in man. This paucity of data has much t...
journal_title:Life sciences
pub_type: 杂志文章,评审
doi:10.1016/0024-3205(89)90262-2
更新日期:1989-01-01 00:00:00
abstract::BIM 23014 is a somatostatin analog displaying an increased biological half life due to resistance to enzymatic degradation. This peptide inhibits GH release directly at the level of pituitary somatotrophs. In addition, an action of BIM 23014 at the level of the hypothalamus is possible since somatostatinergic fibers a...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(92)90610-2
更新日期:1992-01-01 00:00:00
abstract:AIMS:Enhanced aerobic glycolysis is an essential hallmark of malignant cancer. Blocking the glycolytic pathway has been suggested as a therapeutic strategy to impair the proliferation of tumor cells. Metformin, a widely used anti-diabetes drug, exhibits anti-tumor properties. However, the underlying molecular mechanism...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2019.116966
更新日期:2019-12-15 00:00:00
abstract::Sodium-dependent transport of D-glucose has been reported only in epithelial cells of small intestine and kidney, and well-differentiated tumors thereof. We observed a two-fold decrease (p < 0.05) in the intracellular distribution volume (Vic, defined as steady-state intracellular uptake divided by extracellular conce...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(96)00114-2
更新日期:1996-01-01 00:00:00
abstract:AIMS:The aim of this study was to investigate the molecular mechanism underlying preterm white matter injury (WMI) via the identification and functional analysis of differentially expressed long non-coding RNAs (lncRNAs) and mRNAs. MAIN METHODS:A neonatal rat model of preterm WMI was established by ligating the common...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2020.117815
更新日期:2020-08-15 00:00:00
abstract::Acyl glucuronides are reactive electrophilic metabolites of carboxylate drugs, capable of undergoing hydrolysis, rearrangement and covalent binding reactions with proteins in vivo. Such covalent drug-protein adducts may be prerequisites for certain idiosyncratic immune and toxic responses in susceptible individuals. T...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(00)00958-9
更新日期:2000-12-22 00:00:00
abstract:AIMS:We performed a systematic review and meta-analysis on the effect of HIV infection and antiretroviral therapy (ART) on carotid intima-media thickness (cIMT) to elucidate the role of HIV infection and ART. Also, an analysis on the role of ethnicity and gender on cIMT in HIV-infected populations was performed. MAIN ...
journal_title:Life sciences
pub_type: 杂志文章,meta分析
doi:10.1016/j.lfs.2019.116851
更新日期:2019-10-15 00:00:00
abstract:AIMS:Enhancing myogenesis has been identified as a possible target to improve insulin sensitivity and protect against metabolic diseases. Catalpol, an iridoid glycoside, has been shown to exert a hypoglycaemic effect by improvement of insulin sensitivity; however, the underlying mechanism remains unknown. In this study...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2018.08.028
更新日期:2018-09-15 00:00:00
abstract::Resveratrol, a polyphenolic phytoaxelin present in red wine, has been suggested to protect against atherosclerosis and cardiovascular disease because of its antioxidant effects. Intercellular adhesion molecule (ICAM-1), induced by cytokines, has been hypothesized to play a role in the early events during atheroscleros...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2005.04.052
更新日期:2005-12-12 00:00:00
abstract::During the myocardial protection induced by ischemic preconditioning a reduction in myocardial metabolism occurs due to activation of the A1 adenosine receptors. This study investigates whether preconditioning changes both resting coronary flow and the magnitude of coronary reactive hyperemia and whether A1 adenosine ...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(99)00034-x
更新日期:1999-01-01 00:00:00
abstract::Palytoxin induced increases in cytosolic Ca2+ and tension, which were dependent on external Ca2+, and depolarized the membrane in endothelium-denuded porcine coronary arteries. When the endothelium was present, however, these effects were greatly inhibited, suggesting that some factors from endothelium inhibited the p...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(96)00682-0
更新日期:1997-01-01 00:00:00
abstract:AIMS:Serotonergic neurons and amino acid neurons are involved in the central nervous control of lower urinary tract function. We investigated the role of the serotonergic system in the central regulation of micturition, as well as the relationship between serotonergic neurons and amino acid neurons in the lumbosacral c...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2009.08.013
更新日期:2009-10-07 00:00:00
abstract::Excessive fibrosis and extracellular matrix deposition resulting from upregulation of target genes expression mediated by transforming growth factor-beta (TGF-β)/SMAD and hypoxia inducible factor-1 (HIF-1) signaling pathways are the main mechanisms that drive keloid formation. Sumoylation is a protein posttranslationa...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2020.117859
更新日期:2020-08-15 00:00:00
abstract::Growth of P. aeruginosa, slowed by the addition of monofluoromethylornithine, difluoromethylarginine and dicyclohexylammonium sulfate, could be restored by addition of 0.1 mM putrescine plus 0.1 muM spermidine, or 0.1 mM spermidine or 5 mM putrescine by themselves. Lower concentrations of putrescine (0.1 mM - 1 mM) al...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(84)90605-2
更新日期:1984-04-16 00:00:00
abstract::Intestinal mucosa, bone marrow hematopoietic cells and brain have limited capacity for the de novo synthesis of nucleosides (NSs) and nucleotides (NTs). Whereas the role of dietary NS and NT in the former two tissues is known, it is not known in the brain. Therefore we studied the effect of dietary NS and NT mixture o...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(96)00526-7
更新日期:1996-01-01 00:00:00