Abstract:
AIM:Omi is an ATP-independent serine protease that is necessary for neuronal function and survival. The aim of this study was to investigate the role of protease Omi in regulating differentiation of mouse neuroblastoma cells and to identify the substrate of Omi involved in this process. METHODS:Mouse neuroblastoma N2a cells and Omi protease-deficient mnd2 mice were used in this study. To modulate Omi and E2F1 expression, N2a cells were transfected with expression plasmids, shRNA plasmids or siRNA. Protein levels were detected using immunoblot assays. The interaction between Omi and E2F1 was studied using immunoprecipitation, GST pulldown and in vitro cleavage assays. N2a cells were treated with 20 μmol/L retinoic acid (RA) and 1% fetal bovine serum to induce neurite outgrowth, which was measured using Image J software. RESULTS:E2F1 was significantly increased in Omi knockdown cells and in brain lysates of mnd2 mice, and was decreased in cells overexpressing wild-type Omi, but not inactive Omi S276C. In brain lysates of mnd2 mice, endogenous E2F1 was co-immunoprecipitated with endogenous Omi. In vitro cleavage assay demonstrated that Omi directly cleaved E2F1. Treatment of N2a cells with RA induced marked differentiation and neurite outgrowth accompanied by significantly increased Omi and decreased E2F1 levels, which were suppressed by pretreatment with the specific Omi inhibitor UCF-101. Knockdown of Omi in N2a cells suppressed RA-induced neurite outgrowth, which was partially restored by knockdown of E2F1. CONCLUSION:Protease Omi facilitates neurite outgrowth by cleaving the transcription factor E2F1 in differentiated neuroblastoma cells; E2F1 is a substrate of Omi.
journal_name
Acta Pharmacol Sinjournal_title
Acta pharmacologica Sinicaauthors
Ma Q,Hu QS,Xu RJ,Zhen XC,Wang GHdoi
10.1038/aps.2015.48subject
Has Abstractpub_date
2015-08-01 00:00:00pages
966-75issue
8eissn
1671-4083issn
1745-7254pii
aps201548journal_volume
36pub_type
杂志文章abstract:AIM:To prepare neutralizing monoclonal antibody (mAb) against extracellular immunoglobulin (Ig)-like domain III of vascular endothelial growth factor receptor KDR and study its biological activity. METHODS:Soluble KDR Ig domain III (KDR-III) fusion protein was expressed in E Coli and purified from the bacterial peripl...
journal_title:Acta pharmacologica Sinica
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更新日期:2004-10-01 00:00:00
abstract:AIM:The mechanism of tramadol-induced vasodilation was investigated using isolated rabbit thoracic aortic rings. METHODS:Aortic rings from 8 rabbits were placed in organ bath and precontracted with phenylephrine (10(-5) mol/L) before addition of tramadol. Relaxation responses by tramadol were evaluated in the presence...
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abstract:AIM:To evaluate the protective effects of apocynin on "two-hit" injury in rats. METHODS:"Two-hit" injury model of rat was induced by hemorrhagic shock (40 mmHg for 45 min) followed by iv administration of lipopolysaccharide (LPS, 150 microg/kg). Rats were randomized into seven groups: Sham, LPS, hemorrhage, hemorrhage...
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abstract:AIM:To evaluate the efficiency of 3 short hairpin RNA (shRNA) interfering with the herpes simplex virus type 1 (HSV-1) gene coding glycoprotein D (gD) for inhibiting the gD expression and virus replication in vitro. METHODS:Vero cells were selected for an in vitro model of infection. Three shRNA sequences (shRNAgD1, -...
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abstract:AIM:To investigate the effect of a group of novel synthetic dithiolane analogs of lignans and a well characterized platelet-activating factor (PAF) receptor antagonist, L659,989 on PAF-receptor binding, IFN-gamma- and lipopolysaccharide (LPS)-induced NO production, and steady-state inducible nitric-oxide synthase (iNOS...
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abstract::Cycloastragenol (CAG) is the active form of astragaloside IV isolated from Astragalus Radix, which displays multiple pharmacological effects. Silent information regulator 1 (SIRT1), a class III histone deacetylase, has been shown to play an important role in neuroprotection against cerebral ischemia. In this study, we...
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pub_type: 杂志文章,评审
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更新日期:2017-07-01 00:00:00
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pub_type: 杂志文章
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更新日期:2010-07-01 00:00:00
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journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2015.95
更新日期:2015-12-01 00:00:00
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doi:
更新日期:2001-10-01 00:00:00
abstract::The combination of technological advances, genomic sequences and market success is catalyzing rapid development of antibody-based therapeutics. Cell surface receptors and ion channel proteins are well known drug targets, but the latter has seen less success. The availability of crystal structures, better understanding...
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pub_type: 杂志文章
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abstract:AIM:Matrine is an alkaloid from Sophora alopecuroides L, which has shown a variety of pharmacological activities and potential therapeutic value in cardiovascular diseases. In this study we examined the protective effects of matrine against diabetic cardiomyopathy (DCM) in rats. METHODS:Male SD rats were injected with...
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doi:
更新日期:2004-07-01 00:00:00
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更新日期:2018-09-01 00:00:00
abstract:AIM:To investigate the effect and mechanism of morphine on purine nucleotide catabolism. METHODS:The rat model of morphine dependence and withdrawal and rat C6 glioma cells in culture were used. Concentrations of uric acid in the plasma were measured by the uricase-rap method, adenosine deaminase (ADA) and xanthine ox...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
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更新日期:2007-08-01 00:00:00
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pub_type: 杂志文章
doi:
更新日期:2002-02-01 00:00:00
abstract:AIM:To investigate the prevalence of hepatitis B virus (HBV) genotype mixtures among patients with chronic hepatitis B (CHB) in Eastern China. METHODS:A total of 4908 chronic HBV patients from Eastern China were enrolled. HBV genotypes and subgenotypes were determined using a multiplex PCR technique. Serum viral loads...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2012.78
更新日期:2012-10-01 00:00:00
abstract:AIM:To study the synaptic mechanisms involved in the 5-hydroxytryptamine1A/7 (5-HT1A/7) receptor-mediated reflex control of cardiac vagal preganglionic neurons (CVPN). METHODS:CVPN were retrogradely labeled and identified in brain stem slices of newborn rats, and their synaptic activity was examined using whole-cell p...
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pub_type: 杂志文章
doi:10.1111/j.1745-7254.2008.00745.x
更新日期:2008-05-01 00:00:00
abstract:AIM:To study the effect of gum mastic, a natural resin, on the proliferation of androgen-independent prostate cancer PC-3 cells, and further investigate the mechanisms involved in this regulatory system, taking nuclear factor kappaB (NF-kappaB) signal as the target. METHODS:3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltet...
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pub_type: 杂志文章
doi:10.1111/j.1745-7254.2007.00536.x
更新日期:2007-03-01 00:00:00
abstract::An increasing number of cases of herb-induced liver injury (HILI) have been reported, presenting new clinical challenges. In this study, taking Polygonum multiflorum Thunb (PmT) as an example, we proposed a computational systems toxicology approach to explore the molecular mechanisms of HILI. First, the chemical compo...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
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更新日期:2017-05-01 00:00:00
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journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2016.88
更新日期:2016-12-01 00:00:00
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journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2003-09-01 00:00:00
abstract:AIM:To study the alterations of myocardial taurine transport function, taurine transporter (TAUT), and cysteine sulfinate decarboxylase (CSD) mRNA as well as effect of exogenous taurine in rats with isoproterenol (ISO)-induced cardiomegaly. METHODS:[3H]-Taurine uptake and release on myocardium were determined. Binding...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2002-10-01 00:00:00