Arachidonic acid is involved in the regulation of hCG induced steroidogenesis in rat Leydig cells.

Abstract:

:Phospholipase C (PLC), an enzyme involved in the hydrolysis of membrane phospholipid- phosphatidylinositol-bisphosphate to inositol triphosphate and diacylglycerol, and Phorbol 12, myristate 13, acetate (PMA), a tumor promoting agent, could significantly stimulate testosterone (T) secretion from Leydig cells. Arachidonic acid (AA) stimulated T secretion by about 2 fold. The steroidogenic effect of PLC and AA was biphasic. At low concentrations both PLC and AA (100 mU and 12.5 microM, respectively) augmented hCG induced T secretion, while at higher concentrations (PLC: 500 mU and AA: 200 microM) they inhibited steroid production. AA also had a biphasic effect on hCG induced cyclic AMP secretion. 5, 8, 11, 14 Eicosatetraynoic acid (ETYA), a general inhibitor of AA metabolism, and Nordihydroguaiaretic acid (NDGA), an inhibitor of the lipoxygenase pathway of AA metabolism, inhibited hCG induced T secretion while indomethacin, an inhibitor of cyclo-oxygenase pathway, had no effect on hCG induced T secretion. We conclude from these data that AA plays a role in the regulation of hCG induced steroidogenic responses in rat Leydig cells and that the metabolite(s) of AA that are involved are not cyclooxygenase products.

journal_name

Life Sci

journal_title

Life sciences

authors

Didolkar AK,Sundaram K

doi

10.1016/0024-3205(87)90223-2

subject

Has Abstract

pub_date

1987-07-27 00:00:00

pages

471-7

issue

4

eissn

0024-3205

issn

1879-0631

pii

0024-3205(87)90223-2

journal_volume

41

pub_type

杂志文章
  • Differential effects of short-chain fatty acids on proliferation and production of pro- and anti-inflammatory cytokines by cultured lymphocytes.

    abstract::Short-chain fatty acids (SCFA) are produced by fermentation of water-soluble fiber by anaerobic bacteria in the large bowel. Fiber-rich diets decrease the risk of developing inflammatory bowel disease (IBD) and butyrate enemas are effective as a therapy in some patients. Crohn's disease, one form of IBD, appears to in...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/s0024-3205(03)00490-9

    authors: Cavaglieri CR,Nishiyama A,Fernandes LC,Curi R,Miles EA,Calder PC

    更新日期:2003-08-15 00:00:00

  • Design and characterization of a recombinant immunotoxin for targeted therapy of breast cancer cells: In vitro and in silico analyses.

    abstract:AIMS:GnRH-DFF40 (gonadotropin releasing hormone-DNA fragmentation factor 40) humanized recombinant immunotoxin serves as a prospective candidate for targeted therapy of malignancies with over-expressed gonadotropin releasing hormone receptor (GnRHR). In this study, we attempted to generate a GnRH-based chimeric protein...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/j.lfs.2020.118866

    authors: Barazesh M,Mohammadi S,Jalili S,Kavousipour S,Faraji SN,Mokarram P,Pirhadi S

    更新日期:2021-01-15 00:00:00

  • Hepatic mitochondrial enzyme activity and serum amino acid composition in rats treated with tumor necrosis factor.

    abstract::The biochemical integrity of hepatocellular mitochondria was investigated in rats treated with small doses of human recombinant tumor necrosis factor-alpha (Hur-TNF;50-100 micrograms/kg/d injected intraperitoneally for 5 d) by measuring the activities of three mitochondrial enzymes, glutamate dehydrogenase, succinate ...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/0024-3205(94)00495-e

    authors: Yasmineh WG,Tsai MY,Theologides A

    更新日期:1995-01-01 00:00:00

  • Prostate tumor CXC-chemokine profile correlates with cell adhesion to endothelium and extracellular matrix.

    abstract::Though chemokines of the CXC family are thought to play key roles in neoplastic transformation and tumor invasion, information about CXC chemokines in prostate cancer is sparse. To evaluate the involvement of CXC chemokines in prostate cancer, we analyzed the CXC coding mRNA of both chemokine ligands (CXCL) and chemok...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/j.lfs.2005.08.019

    authors: Engl T,Relja B,Blumenberg C,Müller I,Ringel EM,Beecken WD,Jonas D,Blaheta RA

    更新日期:2006-03-13 00:00:00

  • Effects of subconvulsive and repeated electroconvulsive shock on thyrotropin-releasing hormone in rat brain.

    abstract::Male Sprague-Dawley rats were given a single electroconvulsive shock (ECS) on alternate days and sacrificed 48 hrs after 1, 3, or 5 seizures. The content of TRH in hippocampus, pyriform cortex and amygdala was increased 2.5-fold, 5.4-fold and 4.3-fold respectively, 48 hrs. after 3 alternate-day electroconvulsive shock...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/0024-3205(85)90116-x

    authors: Kubek MJ,Meyerhoff JL,Hill TG,Norton JA,Sattin A

    更新日期:1985-01-28 00:00:00

  • Antagonism of presynaptic dopamine receptors by phenothiazine drug metabolites.

    abstract::Electrically evoked release of dopamine from the caudate nucleus is reduced by the dopamine receptor agonists, apomorphine and bromocriptine, and facilitated by neuroleptic drugs, which act as dopamine autoreceptor antagonists. The potencies of chlorpromazine, fluphenazine, levomepromazine and their hydroxy-metabolite...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/0024-3205(90)90088-9

    authors: Nowak JZ,Arbilla S,Dahl SG,Langer SZ

    更新日期:1990-01-01 00:00:00

  • Dysregulated ion channels and transporters activate endoplasmic reticulum stress in rat kidney of fetal growth restriction.

    abstract:AIMS:The mechanisms underlying the fetal origin of renal disease remains unknown. This study aimed to investigate the profiles of ion channel and transporter proteins in the fetal kidney in fetal growth restriction (FGR)rats, and to explore their association with the fetal origin of renal disease. MAIN METHODS:An FGR ...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/j.lfs.2020.118276

    authors: Guo Y,Lu Y,Wang J,Zhu L,Liu X

    更新日期:2020-10-15 00:00:00

  • Mechanism of antithrombotic effect of heparin and antithrombin in balloon-injured arteries.

    abstract::The mechanism of the antithrombotic effects of heparin and the synthetic antithrombin agent argatroban was evaluated in a dog model. Thrombus formation following balloon injury was evaluated by angioscopy in the right iliac arteries of 20 dogs to serve as a control. After the evaluation of the growth of thrombus on th...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/j.lfs.2004.10.084

    authors: Tomaru T,Kawano HA,Tsujiuchi Y,Suzuki J,Nakajima T,Uchida Y

    更新日期:2005-10-07 00:00:00

  • Effects of ethanol ingestion on glucose transporter-1 protein and mRNA levels in rat brain.

    abstract::In the normal adult brain, glucose provides 90% of the energy requirement, as well as substrate for nucleic acid and lipid synthesis. We have previously observed that ethanol impairs hexose uptake by rat astrocytes in culture. In the present study, male Sprague-Dawley rats, 200-250 g, were fed liquid diet in which 36%...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/0024-3205(93)90489-p

    authors: Singh SP,Srivenugopal KS,Yuan XH,Jiang F,Snyder AK

    更新日期:1993-01-01 00:00:00

  • Molecular modeling of SWR-0342SA, a beta3-selective agonist, with beta1- and beta3-adrenoceptor.

    abstract::The molecular dynamics (MD) simulations study in the formation of the complex between compound SWR-0342SA and beta-ARs suggested that upon binding SWR-0342SA stimulates receptor activation through residues network (Asp104, Leu335 in beta(1)-AR; Asp117, Ser209, Leu303, Ser191 in beta(3)-AR) in an active conformation st...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/j.lfs.2005.09.023

    authors: Ahmed M,Ishiguro M,Nagatomo T

    更新日期:2006-03-20 00:00:00

  • Biomaterial stiffness determines stem cell fate.

    abstract::Stem cells have potential to develop into numerous cell types, thus they are good cell source for tissue engineering. As an external physical signal, material stiffness is capable of regulating stem cell fate. Biomaterial stiffness is an important parameter in tissue engineering. We summarize main measurements of mate...

    journal_title:Life sciences

    pub_type: 杂志文章,评审

    doi:10.1016/j.lfs.2017.04.014

    authors: Lv H,Wang H,Zhang Z,Yang W,Liu W,Li Y,Li L

    更新日期:2017-06-01 00:00:00

  • 23-Hydroxybetulinic acid-mediated apoptosis is accompanied by decreases in bcl-2 expression and telomerase activity in HL-60 Cells.

    abstract::23-Hydroxybetulinic acid, a derivative of betulinic acid, was investigated for its apoptotic effect and the associated telomerase activity in human leukemia HL-60 cells. Apoptosis and bcl-2 were determined by flow cytometry analysis. A PCR-based telomeric repeat amplification protocol assay was used to detect telomera...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/s0024-3205(02)02176-8

    authors: Ji ZN,Ye WC,Liu GG,Hsiao WL

    更新日期:2002-11-22 00:00:00

  • Effect of licorice and glycyrrhizin on murine liver CYP-dependent monooxygenases.

    abstract::This study is aimed to investigate the effect of the prolonged intake of conspicuous amounts of licorice (LE), or its natural constituent glycyrrhizin (G) on murine liver CYP-catalyzed drug metabolism. For this purpose the modulation of the regio- and stereo-selective hydroxylation of testosterone, together with the u...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/s0024-3205(97)01154-5

    authors: Paolini M,Pozzetti L,Sapone A,Cantelli-Forti G

    更新日期:1998-01-01 00:00:00

  • FSH bioactivity is strongly enhanced by kinetic incubation of pre-antral hamster follicles.

    abstract:UNLABELLED:Isolation of meiotic arrested oocytes from mammalian ovaries involves a resumption of the meiosis. Studying the effect of FSH on this process it was found that doses up to of 0.1 IU/ml did not maintain the meiotic arrest in hamster oocytes in pre-antral follicles during static incubation conditions. However,...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/0024-3205(94)90045-0

    authors: Goverde HJ,van de Venne WP

    更新日期:1994-01-01 00:00:00

  • Effects of felbamate, kynurenic acid derivatives and NMDA antagonists on in vitro kainate-induced epileptiform activity.

    abstract::The effects of the novel anticonvulsant felbamate, which binds to the 5-7 dichlorokynurenic binding sites, were tested towards the CA1 epileptiform activity induced in rat hippocampal slices by kainic acid. The effects of the kynurenic acid derivatives 7-chlorokynurenic acid and 5-7 dichlorokynurenic acid and of the N...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/0024-3205(96)00251-2

    authors: Domenici MR,Marinelli S,Sagratella S

    更新日期:1996-05-24 00:00:00

  • Chemopreventive effect of farnesol on DMBA/TPA-induced skin tumorigenesis: involvement of inflammation, Ras-ERK pathway and apoptosis.

    abstract:AIMS:Naturally-derived farnesol has been reported for its chemopreventive and chemotherapeutic efficacy in various cancers. However, the mechanism of action of farnesol is still to be elucidated. The present study demonstrates the chemopreventive potential of farnesol on 9,10-dimethylbenz(a)anthracene (DMBA)-initiated ...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/j.lfs.2009.05.008

    authors: Chaudhary SC,Alam MS,Siddiqui MS,Athar M

    更新日期:2009-07-31 00:00:00

  • Effect of diabetes on aortic nitric oxide synthesis in spontaneously hypertensive rats; does captopril modulate this effect?

    abstract::Nitric oxide (NO) is a potent regulator in the cardiovascular system; it is generated by the nitric oxide synthase (NOS) family of proteins. NO produced in endothelial cells plays a crucial role in vascular functions. The aim of this study was to clarify the effect of diabetes on aortic NO synthesis in a model of gene...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/j.lfs.2005.02.010

    authors: Ibrahim MA,Kanzaki T,Yamagata S,Satoh N,Ueda S

    更新日期:2005-07-15 00:00:00

  • Bisphenol A: What lies beneath its induced diabetes and the epigenetic modulation?

    abstract::Nowadays, endocrine disrupting chemical pollution has become one of the major concerns due to the potential role of these chemicals in provoking endocrine disorders especially type 2 diabetes. As a widespread endocrine disrupting chemical, Bisphenol A, with modest estrogenic activity can exert its detrimental effects ...

    journal_title:Life sciences

    pub_type: 杂志文章,评审

    doi:10.1016/j.lfs.2018.10.044

    authors: Rahmani S,Pour Khalili N,Khan F,Hassani S,Ghafour-Boroujerdi E,Abdollahi M

    更新日期:2018-12-01 00:00:00

  • [11C]S21007, a putative partial agonist for 5-HT3 receptors PET studies. Rat and primate in vivo biological evaluation.

    abstract::We recently labeled with carbon-11, a high affinity, selective, 5-HT3 receptor (5-HT3R) ligand, S21007, for potential positron emission tomography (PET) applications. To evaluate the in vivo binding properties of [11C]S21007, its brain regional distribution, tissue and plasma pharmacokinetics and plasma metabolisation...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/s0024-3205(97)01058-8

    authors: Besret L,Dauphin F,Guillouet S,Dhilly M,Gourand F,Blaizot X,Young AR,Petit-Taboué MC,Mickala P,Barbelivien A,Rault S,Barré L,Baron JC

    更新日期:1998-01-01 00:00:00

  • Dexamethasone inhibits leukocyte migration through endothelial cells towards smooth muscle cells.

    abstract::Leukocyte interactions with endothelial cell monolayers (ECM) and smooth muscle cells (SMC) play an important role during inflammatory processes. Several studies describe an inhibitory effect of dexamethasone on polymorphonuclear leukocytes (PMNL), endothelial cell function, and interleukin-1 (IL-1) release. Aim of th...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/s0024-3205(98)00609-2

    authors: Hofbauer R,Gmeiner B,Handler S,Speiser W,Kapiotis S,Frass M

    更新日期:1999-01-01 00:00:00

  • Mutual stimulation by phosphatidylinositol-4-phosphate and myelin basic protein of their phosphorylation by the kinases solubilized from rat brain myelin.

    abstract::Myelin basic protein and phosphatidylinositol-4-phosphate are phosphorylated in vitro by ATP and solubilized rat brain myelin. When both substrates are present together, the rate of phosphorylation of each is increased about eight-fold. It appears likely that the phosphate turnover of myelin basic protein and of phosp...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/0024-3205(84)90597-6

    authors: Deshmukh DS,Kuizon S,Brockerhoff H

    更新日期:1984-01-16 00:00:00

  • The pharmacokinetics and liver metabolism of N-hydroxy-3,4-methylenedioxyamphetamine (N-OH MDA) in rats.

    abstract::The metabolism and disposition of N-hydroxy-3,4-methylenedioxyamphetamine (N-OH MDA) was studied by utilizing rat liver slices as well as by intravenous pharmacokinetic studies in rats. In the liver slice experiments, N-OH MDA (16 micrograms/ml) was incubated with rat liver slices and the disappearance of N-OH MDA and...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/0024-3205(94)00726-8

    authors: Ravis WR,Valaer AK,Brzozowski D,Clark CR

    更新日期:1994-01-01 00:00:00

  • Vascular smooth muscle cell activation and growth by 4-hydroxynonenal.

    abstract::The present study examines the signal transduction mechanism that is involved in the growth of vascular smooth muscle cells exposed to 4-hydroxynonenal (HNE) in vitro. This aldehyde component of oxidized low-density lipoprotein has been identified in atherosclerotic lesion. Exposure to HNE caused ERK, JNK, and p38 MAP...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/s0024-3205(01)01166-3

    authors: Kakishita H,Hattori Y

    更新日期:2001-06-29 00:00:00

  • The use of intermediate electron acceptors to enhance MTT bioreduction in a microculture tetrazolium assay for human growth hormone.

    abstract::We contrast the effects of three intermediate electron acceptors (IEAs) on the highly quantitative ESTA bioassay for human growth hormone. This is a microculture tetrazolium assay based upon the in vitro reduction of the tetrazolium salt MTT, by Nb2 cells which have been activated with hGH. Each of the IEAs influenced...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/s0024-3205(96)00512-7

    authors: Goodwin CJ,Holt SJ,Downes S,Marshall NJ

    更新日期:1996-01-01 00:00:00

  • The role of melatonin on doxorubicin-induced cardiotoxicity: A systematic review.

    abstract:PURPOSE:Doxorubicin, as an effective chemotherapeutic drug, is commonly used for combating various solid and hematological tumors. However, doxorubicin-induced cardiotoxicity is considered as a serious adverse effect, and it limits the clinical use of this chemotherapeutic drug. The use of melatonin can lead to a decre...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/j.lfs.2019.117173

    authors: Najafi M,Hooshangi Shayesteh MR,Mortezaee K,Farhood B,Haghi-Aminjan H

    更新日期:2020-01-15 00:00:00

  • Characterization and distribution of 3H-(3MeHis2)thyrotropin releasing hormone receptors in rat brain.

    abstract::The characteristics and distribution of putative thyrotropin releasing hormone (TRH) receptors were studied in rat central nervous system using the TRH analogue 3H-(3MeHis2)TRH as a radiolabeled ligand. The analogue had a dissociation constant of 2.3 +/- 0.2 nM and a receptor density of 34 +/- 2 fm/mg protein in whole...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/0024-3205(82)90315-0

    authors: Simasko SM,Horita A

    更新日期:1982-05-24 00:00:00

  • SR 142801, the first potent non-peptide antagonist of the tachykinin NK3 receptor.

    abstract::SR 142801 is the first potent and selective non-peptide antagonist of the tachykinin NK3 receptor. It inhibited [MePhe7]NKB binding to its receptor from various species, including humans. SR 142801 was a competitive antagonist of [MePhe7]NKB-mediated contractions of guinea-pig ileum and inhibited the acetylcholine rel...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/0024-3205(94)00413-m

    authors: Emonds-Alt X,Bichon D,Ducoux JP,Heaulme M,Miloux B,Poncelet M,Proietto V,Van Broeck D,Vilain P,Neliat G

    更新日期:1995-01-01 00:00:00

  • Sleep deprivation reduces the recovery of muscle injury induced by high-intensity exercise in a mouse model.

    abstract::Sleep is crucial to improve athlete performance and their circadian rhythm, but sleep patterns may be disturbed because athletes participate in several competitions. In addition, intensive training programs can cause muscle pain and psychological stress in athletes, resulting in a lack of sleep. Sleep also plays a cri...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/j.lfs.2019.116835

    authors: Yang DF,Shen YL,Wu C,Huang YS,Lee PY,Er NX,Huang WC,Tung YT

    更新日期:2019-10-15 00:00:00

  • Effect of electrical stimulation of the baso-lateral amygdala nucleus on defensive burying shock probe test and elevated plus maze in rats.

    abstract::In the present report, the putative effect of a single electrical stimulation (75, 150 or 300 microA) to the baso-lateral amygdala (BLA) nucleus was assessed in shock probe defensive burying behavior test (DB) and elevated plus maze (EPM). These models have been used for measuring anxiety levels and screening putative...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/s0024-3205(02)02335-4

    authors: Saldívar-González JA,Posadas-Andrews A,Rodríguez R,Gómez C,Hernández-Manjarrez ME,Ortiz-León S,Martínez-Pineda A,Gómez-Laguna D,Salgado V,Manjarrez J,Alvarado R

    更新日期:2003-01-03 00:00:00

  • Increase in brain 125I-cholecystokinin (CCK) receptor binding following chronic haloperidol treatment, intracisternal 6-hydroxydopamine or ventral tegmental lesions.

    abstract::Specific 125I-CCK receptor binding was significantly increased in brain tissue taken from guinea pig or mouse following chronic (2-3 week) daily administration of haloperidol (2-3 mg/kg/day). Scatchard analysis indicated the increase in CCK binding was due to an increased receptor number (B max) with no change in affi...

    journal_title:Life sciences

    pub_type: 杂志文章

    doi:10.1016/0024-3205(83)90224-2

    authors: Chang RS,Lotti VJ,Martin GE,Chen TB

    更新日期:1983-02-21 00:00:00