Abstract:
AIM:The aim of the present study was to explore the mechanism for the Ca2+- dependent inactivation of the canonical transient receptor potential (TRPC) 7 channel expressed in human embryonic kidney 293 cells. METHOD:The whole-cell patch-clamp technique was used in the study. RESULTS:With Ca2+-free external solution, the perfusion of 100 micromol/L carbachol to, or dialysis of the cell with 100 micromol/L guanosine 5'-3-O-(thio)triphosphate (GTPgammaS), induced large inward currents, respectively. These currents were rapidly inhibited by the addition of 1 mmol/L Ca2+ into the bath, and recovery from this inhibition was only partial after the Ca2+ removal, unless vigorous intracellular Ca2+ buffering with 10 mmol/L 1,2 bis(2- aminophenoxy)ethane-N,N,No,No-tetraacetic acid (BAPTA) (plus 4 mmol/L Ca2+) was employed. In contrast, the current induced by a membrane-permeable analog of diacylglycerol (DAG), 1-oleoyl-2-acetyl-sn-glycerol (OAG; 100 micromol/L) did not undergo the inhibition persisting after Ca2+ removal. Interestingly, the inclusion of inositol 1,4,5 trisphosphate (IP3; 100 micromol/L) in the patch pipette rendered the OAG-induced current susceptible to the persistent Ca2+-mediated inhibition independent of the IP3 receptor in the majority of the tested cells, as evidenced by the inability of heparin and thapsigargin in reversing the effect of IP3. CONCLUSION:The present results suggest that Ca2+ entry via the activated TRPC7 channel plays a critical role in inactivating the channel where the cooperative actions of DAG and IP3 are essentially involved.
journal_name
Acta Pharmacol Sinjournal_title
Acta pharmacologica Sinicaauthors
Zhang H,Inoue R,Shi J,Jin XH,Li YQdoi
10.1111/j.1745-7254.2008.00721.xsubject
Has Abstractpub_date
2008-01-01 00:00:00pages
90-7issue
1eissn
1671-4083issn
1745-7254journal_volume
29pub_type
杂志文章abstract:AIM:To investigate the effect of incorporation of an isoleucine zipper (IZ) motif into CD40 on binding activity of CD40 for the CD40 ligand (CD40L). METHODS:Prokaryotic expression vectors for 2 soluble CD40 derivatives, shCD40His and shCD40IZ containing an IZ domain, were constructed and expressed in Escherichia coli....
journal_title:Acta pharmacologica Sinica
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abstract::The serum and glucocorticoid-regulated kinase (SGK) family has been implicated in the regulation of many cellular processes downstream of the PI3K pathway. It plays a crucial role in PI3K-mediated tumorigenesis, making it a potential therapeutic target for cancer. SGK family consists of three isoforms (SGK1, SGK2, and...
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abstract::The pandemic of coronavirus disease 2019 (COVID-19) and its pathogen, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have become the greatest current threat to global public health. The highly infectious SARS-CoV-2 virus primarily attacks pulmonary tissues and impairs gas exchange leading to acute respir...
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abstract:AIM:To evaluate single-dose and multiple-dose pharmacokinetics of cytotoxic T-lymphocyte-associated antigen 4 fusion protein (CTLA4Ig) in healthy volunteers and patients with rheumatoid arthritis (RA). METHODS:The clinical trials included two phase I open studies: study 1 was an open-label dose-escalation study in 27 ...
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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, -...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章
doi:10.1111/j.1745-7254.2008.00828.x
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abstract:AIM:The role of caveolin-1 (Cav-1) in angiogenesis remains poorly understood. The endothelial nitric oxide (NO) synthase (eNOS), a caveolin-interacting protein, was demonstrated to play a predominant role in vascular endothelial growth factor (VEGF) -induced angiogenesis. The purpose of our study was to examine the rol...
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abstract::Lappaconitine (LA) has been widely used for postoperative and cancer pain control. LA exhibits excellent analgesic activity with a longer effective time than common local anesthetics such as tetracaine and bupivacaine. However, the mechanisms underlying the featured analgesic activity of LA remain largely unknown. Her...
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abstract::The revolutionary induced pluripotent stem cell (iPSC) technology provides a new path for cell replacement therapies and drug screening. Patient-specific iPSCs and subsequent differentiated cells manifesting disease phenotypes will finally position human disease pathology at the core of drug discovery. Cells used to t...
journal_title:Acta pharmacologica Sinica
pub_type: 杂志文章,评审
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更新日期:2013-06-01 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
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pub_type: 杂志文章
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更新日期:2010-12-01 00:00:00
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doi:
更新日期:2000-08-01 00:00:00
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更新日期:2004-08-01 00:00:00
abstract:AIM:Gemcitabine has been increasingly prescribed for the treatment of gallbladder cancer. However, the response rate is low. The aim of this study is to determine whether icariin, a flavonoid isolated from Epimedi herba, could potentiate the antitumor activity of gemcitabine in gallbladder cancer. METHODS:Human gallbl...
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abstract:AIM:To investigate the immunoregulatory functions of water extracts of Hericium erinaceum (WEHE) focusing on natural killer (NK) cell-based anticancer activities. METHODS:Mouse splenocytes or purely isolated NK cells were stimulated with 1-100 mg/L WEHE for 24 h followed by co-culture with (51)Cr-labeled Yac-1 cells f...
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abstract:AIM:To study and establish a proteome reference map and regulation network of neonatal rat cardiomyocyte. METHODS:Cultured cardiomyocytes of neonatal rats were used. All proteins expressed in the cardiomyocytes were separated and identified by two-dimensional polyacrylamide gel electrophoresis (2-DE) and matrix-assist...
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pub_type: 杂志文章,收录出版
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doi:
更新日期:2003-09-01 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...
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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::Type capital I, Ukrainian natural killer T cells (NKT cells), a subset of CD1d-restricted T cells with invariant Valphabeta TCR, are characterized by prompt production of large amounts of Th1 and/or Th2 cytokines upon primary stimulation through the TCR complex. The rapid release of cytokines implies that type capital...
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pub_type: 杂志文章,评审
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更新日期:2010-09-01 00:00:00
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更新日期:2013-06-01 00:00:00
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doi:
更新日期:2004-12-01 00:00:00
abstract:AIM:To investigate the blocking effects of methylflavonolamine (MFA) on human Na(V)1.5 channels expressed in Xenopus laevis oocytes and on sodium currents (I(Na)) in rabbit ventricular myocytes. METHODS:Human Na(V)1.5 channels were expressed in Xenopus oocytes and studied using the two-electrode voltage-clamp techniqu...
journal_title:Acta pharmacologica Sinica
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doi:10.1038/aps.2010.8
更新日期:2010-03-01 00:00:00
abstract:AIM:To investigate the effects of rapamycin on glutamate uptake in cultured rat astrocytes expressing N-terminal 552 residues of mutant huntingtin (Htt-552). METHODS:Primary astrocyte cultures were prepared from the cortex of postnatal rat pups. An astrocytes model of Huntington's disease was established using the ast...
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pub_type: 杂志文章
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更新日期:2012-03-01 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...
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doi:
更新日期:2004-09-01 00:00:00
abstract:AIM:Toxicity of retinol (vitamin A) has been previously associated with apoptosis and/or cell malignant transformation. Thus, we investigated the pathways involved in the induction of proliferation, deformation and proliferative focus formation by retinol in cultured Sertoli cells of rats. METHODS:Sertoli cells were i...
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pub_type: 杂志文章
doi:10.1038/aps.2011.202
更新日期:2012-04-01 00:00:00
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更新日期:2002-04-01 00:00:00