Abstract:
AIM:To develop a high-throughput real-time assay based on molecular beacons to monitor the integrase 3'-processing reaction in vitro and apply it to inhibitor screening. METHODS:The recombinant human immunodeficiency virus (HIV)-1 integrase (IN) is incubated with a 38 mer oligonucleotide substrate, a sequence identical to the U5 end of HIV-1 long terminal repeats (LTR). Based on the fluorescence properties of molecular beacons, the substrate is designed to form a stem-loop structure labeled with a fluorophore at the 5' end and a quencher at the 3' end. IN cleaves the terminal 3'-dinucleotide containing the quencher, resulting in an increase in fluorescence which can be monitored on a spectrofluorometer. To optimize this assay, tests were performed to investigate the effects of substrates, enzyme and the metal ion concentrations on the IN activity and optimal parameters were obtained. Moreover, 2 IN inhibitors were employed to test the performance of this assay in antiviral compound screening. RESULTS:The fluorescent intensity of the reaction mixture varies linearly with time and is proportional to the velocity of the 3'-processing reaction. Tests were performed and the results showed that the optimal rate was obtained for a reaction mixture containing 50 mg/L recombinant HIV-1 IN, 400 nmol/L substrate, and 10 mmol/L Mn(2+). The IN 3'-processing reaction under the optimal conditions showed a more than 18-fold increase in the fluorescence intensity compared to the enzyme-free control. The IC50 values of the IN inhibitors obtained in our assay were similar to the values obtained from a radiolabeled substrate assay. CONCLUSION:Our results demonstrated that this is a fast, reliable, and sensitive method to monitor HIV IN 3'-processing reaction and that it can be used for inhibitor screening.
journal_name
Acta Pharmacol Sinjournal_title
Acta pharmacologica Sinicaauthors
He HQ,Ma XH,Liu B,Zhang XY,Chen WZ,Wang CX,Cheng SHdoi
10.1111/j.1745-7254.2007.00561.xsubject
Has Abstractpub_date
2007-06-01 00:00:00pages
811-7issue
6eissn
1671-4083issn
1745-7254journal_volume
28pub_type
杂志文章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...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2002-11-01 00:00:00
abstract:AIM:To study the association between APOE polymorphisms and cerebral infarction through a case-control study among the Chinese Han population. METHODS:First-ever cerebral infarction patients (n=226) whose ages ranged from 40 to 60 years old were recruited from Department of Neurology, Zhongshan Hospital, Shanghai, and...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2004-03-01 00:00:00
abstract:AIM:To test the hypothesis that PI3K/Akt/eNOS signaling has a protective role in a murine model of ventilation associated lung injury (VALI) through down-regulation of p38 MAPK signaling. METHODS:Male C57BL/J6 (wild-type, WT) or eNOS knockout mice (eNOS(-/-)) were exposed to mechanical ventilation (MV) with low (LV(T)...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2009.190
更新日期:2010-02-01 00:00:00
abstract::Cerebral edema is a pathological hallmark of various central nervous system (CNS) insults, including traumatic brain injury (TBI) and excitotoxic injury such as stroke. Due to the rigidity of the skull, edema-induced increase of intracranial fluid significantly complicates severe CNS injuries by raising intracranial p...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/s41401-020-00503-5
更新日期:2020-10-01 00:00:00
abstract:AIM:To study the expressions of vascular endothelial growth factor (VEG F), angiopoietin-1 (Ang-1), angiopoietin-2 (Ang-2), Tie-1, and Tie-2 in C57BL/6 mouse brain after permanent focal cerebral ischemia. METHODS:The mRNA levels of VEGF, Ang-1, Ang-2, Tie-1, and Tie-2 were measured by semiquantitative reverse transcri...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2002-05-01 00:00:00
abstract::Androgen and androgen receptor (AR) signaling are crucial for the genesis of prostate cancer (PCa), which can often develop into androgen-ligand-independent diseases that are lethal to the patients. Recent studies show that even these hormone-refractory PCa require ligand-independent AR signaling for survival. As curr...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章,评审
doi:10.1111/j.1745-7254.2007.00683.x
更新日期:2007-09-01 00:00:00
abstract:AIM:The current therapeutic approaches have a limited effect on the dysregulated pulmonary vascular remodeling, which is characteristic of pulmonary arterial hypertension (PAH). In this study we examined whether salvianolic acid A (SAA) extracted from the traditional Chinese medicine 'Dan Shen' attenuated vascular remo...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2016.22
更新日期:2016-06-01 00:00:00
abstract:AIM:To determine propofol concentration in the cerebral spinal fluid (CSF) of neurosurgical patients and carry out a preliminary population pharmacodynamic study. METHODS:Twenty-seven elective neurosurgical patients (12 men and 15 women) aged 17-74 years received propofol in a bolus dose of 2 mg/kg for 5 min and an in...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1111/j.1745-7254.2006.00309.x
更新日期:2006-05-01 00:00:00
abstract:AIM:To determine whether ATP-sensitive potassium channels are altered in VSMC from arotas and mesenteric arteries of obese rat, and their association with obesity-triggered increase in blood pressure. METHODS:Obesity was induced by 24 weeks of high-fat diet feeding in male Sprague-Dawley rats. Control rats were fed wi...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1111/j.1745-7254.2008.00810.x
更新日期:2008-10-01 00:00:00
abstract:AIM:To investigate the effects of the cardiotonic steroid, ouabain, on cardiac differentiation of murine embyronic stem cells (mESCs). METHODS:Cardiac differentiation of murine ESCs was enhanced by standard hanging drop method in the presence of ouabain (20 μmol/L) for 7 d. The dissociated ES derived cardiomyocytes we...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2010.188
更新日期:2011-01-01 00:00:00
abstract:AIM:To investigate the mechanism of brain interleukin-1 beta (IL-1 beta) in reserpine-induced behavioral depression in rats. METHODS:Porsult swim test was used in the measurement of depressive behavior and ELISA was used in measurement of brain IL-1 beta. RESULTS:Intraperitoneal injection of reserpine (0, 4, 6, and 8...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2004-03-01 00:00:00
abstract:AIM:To investigate the effects of different muscarinic receptor (M) subtypes in the spinal cord on the scores of naloxone-precipitated morphine-withdrawal symptoms and the changes of nNOS expression in locus coeruleus (LC). METHODS:nNOS immunohistochemistry, intrathecal injection (it), and antisense oligonucleotides (...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2002-08-01 00:00:00
abstract:AIM:To investigate the blood pressure (BP), baroreflex sensitivity (BRS), and organ damage in hybrids of spontaneously hypertensive rats and Sprague-Dawley rats. METHODS:Spontaneously hypertensive rats and Sprague-Dawley rats were crossbred, and the F1 hybrids were inbred randomly to produce an F2 generation. At the a...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1111/j.1745-7254.2005.00162.x
更新日期:2005-09-01 00:00:00
abstract:AIM:To study the effects of 3-n-butylphthalide (NBP) on the TREK-1 channel expressed in Chinese hamster ovary (CHO) cells. METHODS:Whole-cell patch-clamp recording was used to record TREK-1 channel currents. The effects of varying doses of l-NBP on TREK-1 currents were also observed. Current-clamp recordings were perf...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2010.210
更新日期:2011-02-01 00:00:00
abstract:AIM:To examine the effects of anisomycin on glioma cells and the related mechanisms in vitro. METHODS:The U251 and U87 human glioblastoma cell lines were tested. The growth of the cells was analyzed using a CCK-8 cell viability assay. Apoptosis was detected using a flow cytometry assay. The expression of proteins and ...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2012.46
更新日期:2012-07-01 00:00:00
abstract:AIM:To investigate the effects of trans-cinnamaldehyde (TCA) on the human leukemia K562 cell line and the cytotoxicity of cytokine-induced killer (CIK) cells against K562 cells. METHODS:Apoptosis, Fas expression, and mitochondrial transmembrane potential in K652 cells were analyzed using flow cytometry. K562 cells wer...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2010.76
更新日期:2010-07-01 00:00:00
abstract:AIM:Overexpression of human tissue kallikrein (HK), mediated by recombinant adeno-associated virus (rAAV), decreased blood pressure in spontaneous hypertensive rats (SHRs) and reduced injury to the heart, aorta and kidney. In this study, we used both an in vivo animal model and in vitro cell culture system to investiga...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2009.114
更新日期:2009-09-01 00:00:00
abstract:AIM:To compare high K(+ )-induced contraction and optimal resting tension measured by two commonly used techniques of hypertonic and isotonic K(+ ) in aortas with and without adventitial fat from various age rats. METHODS:Three age groups of rats (15, 25, and 62 weeks) were used to prepare thoracic aortic rings in whi...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1111/j.1745-7254.2007.00548.x
更新日期:2007-05-01 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
abstract:AIM:KCNQ1 and KCNE1 form a complex in human ventricular cardiomyocytes, which are important in maintaining a normal heart rhythm. In the present study we investigated the effects of a homologous series of 1-alkanols on KCNQ1/KCNE1 channels expressed in Xenopus oocytes. METHODS:ECG recording was made in rats injected w...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2015.133
更新日期:2016-01-01 00:00:00
abstract:AIM:To study the effects of tanshinone IIA (TIIA) on lipopolysaccharide (LPS)-induced acute lung injury in mice and the underlying mechanisms. METHODS:Mice were injected with LPS (10 mg/kg, i.p.), then treated with TIIA (10 mg/kg, i.p.). Seven hours after LPS injection, the lungs were collected for histological study....
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2014.112
更新日期:2015-02-01 00:00:00
abstract:AIM:The purpose of this study was to reveal the effects of hepatocyte growth factor (HGF) variants on human breast cancer cells and the differential signaling pathways of the variants in controlling cell proliferation and invasion. METHODS:Four HGF variants (NK1, NK2, NK3, and NK4) were created by gene engineering, an...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1111/j.1745-7254.2008.00799.x
更新日期:2008-06-01 00:00:00
abstract:AIM:HMGB1 (high-mobility group box-1) is a nuclear protein containing a consensus RB (retinoblastoma)-binding LXCXE motif. In this study, we studied the potential association of HMGB1 and RB and the in vitro and in vivo activities of HMGB1 in human breast cancer cells. METHODS:The protein-protein interaction was deter...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1111/j.1745-7254.2007.00669.x
更新日期:2007-12-01 00:00:00
abstract:AIM:Radiation-induced brain injury (RIBI) is the most common and severe adverse effect induced by cranial radiation therapy (CRT). In the present study, we examined the effects of the traditional Chinese medicine Shenqi Fuzheng Injection (SFI) on RIBI in mice, and explored the underlying mechanisms. METHODS:C57BL/6J m...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2015.69
更新日期:2015-11-01 00:00:00
abstract::Human ether-a-go-go related gene (hERG) potassium (K(+)) channels play a critical role in cardiac action potential repolarization. Mutations that reduce hERG conductance or surface expression may cause congenital long QT syndrome (LQTS). However, the channels can be inhibited by structurally diverse small molecules, r...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章,评审
doi:10.1038/aps.2011.70
更新日期:2011-06-01 00:00:00
abstract::Innovative teaching methodologies in different parts of the world are being practiced since last 3 decades. The aim of this review is to report the transition from traditional to innovative self learning process in Ziauddin Medical University, a new medical institute of Pakistan. Various problems encountered have been...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2004-09-01 00:00:00
abstract:AIM:To evaluate the pharmacokinetics of L-threonate after single or multiple oral administrations and its safety profile in healthy Chinese volunteers. METHODS:This was an open-label, single- and multiple-dose study. The subjects were assigned to receive a single dose, 675, 2025, or 4050 mg, of calcium L-threonate (n=...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2011.138
更新日期:2011-12-01 00:00:00
abstract::Recent evidence shows that dopamine D2-like receptor (D2DR) antagonists, such as trifluoperazine and thioridazine, are effective for cancer therapy and inhibition of cancer stem-like cells (CSCs). In this study, we investigated the anti-cancer effects of combination therapy of dexamethasone (DEX) and sulpiride (SUL), ...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1038/aps.2017.24
更新日期:2017-09-01 00:00:00
abstract:AIM:To investigate whether total Panax notoginseng saponins (PNS) could protect endothelium of rabbit iliac artery against balloon endothelial denudation (BED) injury. METHODS:The morphology changes of the endothelium were observed with scanning electron microscope (SEM) and hematoxylin and eosin stain after BED of ra...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:
更新日期:2004-09-01 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...
journal_title:Acta pharmacologica Sinica
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