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Fang X, Liu CX, Zeng XR, Huang XM, Chen WL, Wang Y, Ai F. Orphan nuclear receptor COUP-TFII is an oncogenic gene in renal cell carcinoma. Clin Transl Oncol 2019; 22:772-781. [PMID: 31368079 DOI: 10.1007/s12094-019-02190-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Accepted: 07/17/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Chicken ovalbumin upstream promoter-transcription factor II (COUP-TFII) may be an oncogenic gene in renal cell carcinoma (RCC). However, the direct association between COUP-TFII expression and patient survival has not been investigated in patients with RCC, and the molecular oncogenesis of COUP-TFII in RCC remains unclear. METHODS The mRNA expression levels of COUP-TFII in the tumors of 283 patients with RCC were determined by RT-qPCR. The remaining 266 patients were categorized into low- and high-expression groups according to the cut off value generated by receiver operating curve (ROC) analysis. The function of COUP-TFII in RCC cells was tested by knockdown experiments in vitro. RESULTS In the present study, it was revealed that the mRNA expression levels of COUP-TFII were significantly higher in tumors compared with those in adjacent non-cancerous tissues, and that the overexpression of COUP-TFII was strongly associated with poor patient survival. It was further demonstrated that knockdown of COUP-TFII suppressed proliferation, and induced apoptosis and cell cycle arrest in RCC cells in vitro. This also resulted in the activation of the mitochondria-mediated apoptosis pathway, impaired migration and invasion of RCC cells through epithelial-mesenchymal transition in vitro, and suppressed tumor growth in vivo. In addition, it was revealed that the induction of cell migration and invasion by COUP-TFII was mediated, at least in part, by integrin subunit β1. CONCLUSIONS In summary, the present study indicated that COUP-TFII is an oncogenic gene in RCC, and a potential therapeutic target for the treatment of the disease.
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Affiliation(s)
- X Fang
- Department of Nephrology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, People's Republic of China
| | - C-X Liu
- Department of Nephrology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, People's Republic of China
| | - X-R Zeng
- Department of Nephrology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, People's Republic of China
| | - X-M Huang
- Department of Nephrology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, People's Republic of China
| | - W-L Chen
- Department of Nephrology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, People's Republic of China
| | - Y Wang
- Department of Nephrology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, People's Republic of China.
| | - F Ai
- Department of Emergency, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, People's Republic of China.
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Lan H, Xu Q, El-Battrawy I, Li X, Zhao Z, Lang S, Cyganek L, Zimmermann WH, Wieland T, Zeng XR, Dang XT, Borggrefe M, Zhou XB, Akin I. P3822Esophageal cancer related gene-4 affects multiple ion channel expression in human-induced stem cell-derived cardiomyocytes. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- H Lan
- First Department of Medicine, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Q Xu
- First Department of Medicine, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - I El-Battrawy
- First Department of Medicine, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - X Li
- First Department of Medicine, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Z Zhao
- First Department of Medicine, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - S Lang
- First Department of Medicine, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - L Cyganek
- Stem Cell Unit, Clinic for Cardiology and Pneumology, University Medical Center Göttingen,, Göttingen, Germany
| | - W H Zimmermann
- Institute of Pharmacology and Toxicology, University of Göttingen,, Göttingen, Germany
| | - T Wieland
- Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - X R Zeng
- Southwest Medical University, Institute of Cardiovascular Research, Luzhou, China People's Republic of
| | - X T Dang
- Southwest Medical University, Institute of Cardiovascular Research, Luzhou, China People's Republic of
| | - M Borggrefe
- First Department of Medicine, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - X B Zhou
- First Department of Medicine, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - I Akin
- First Department of Medicine, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
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Zhong H, Duan SH, Hong YP, Li ML, Liu YQ, Luo CJ, Luo QY, Xiao SZ, Xie HL, Xu YP, Yang XM, Zeng XR, Zhong QY. Retraction of articles by H. Zhong et al. Acta Crystallogr Sect E Struct Rep Online 2009; 66:e11-2. [PMID: 21579903 PMCID: PMC2980006 DOI: 10.1107/s1600536809049964] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Accepted: 12/15/2009] [Indexed: 11/27/2022]
Abstract
Retraction of 41 articles by H. Zhong et al.. A series of 41 papers by H. Zhong et al. are retracted.
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4
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Zhong H, Zeng XR, Yang XM, Luo QY. Bis(4,4'-bipyridine-κN)tetra-kis(nitrato-κO,O')tin(IV). Retraction. Acta Crystallogr Sect E Struct Rep Online 2008; 64:e29. [PMID: 21580806 PMCID: PMC2959706 DOI: 10.1107/s1600536808031267] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2008] [Accepted: 09/26/2008] [Indexed: 11/11/2022]
Abstract
Retraction of Acta Cryst. (2007), E63, m1566. The paper by Zhong, Zeng, Yang & Luo [Acta Cryst. (2007), E63, m1566] is retracted.
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5
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Abstract
The Bcl-2 family of proteins are key regulators of apoptosis. Bcl-xL, is an anti-apoptotic protein with a high degree of homology to Bcl-2; however, the signals that regulate Bcl-xL and Bcl-2 appear to be different. Levels of Bcl-xL, but not Bcl-2, are increased in response to various survival signals. Furthermore, an inverse correlation between the levels of Bcl-2 and Bcl-xL has been reported for a number of cancers. Although the precise molecules that control Bcl-xL activity are unclear, the STAT, Rel/NF-kappaB, and Ets transcription factor families have recently been reported to directly regulate the bcl-x gene. Activated Ras, integrin, vitronectin, and hepatocyte growth factor signaling cascades have also been linked to changes in Bcl-xL expression. Bcl-xL can also be affected by post-translational mechanisms. Here we review recent advances in identifying the signaling pathways and factors involved in regulation of the bcl-x gene.
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Affiliation(s)
- J M Grad
- Sylvester Comprehensive Cancer Center, Department of Microbiology and Immunology, University of Miami School of Medicine, Florida, USA
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6
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Zeng XR, Xiong RG, Xu Y, Liu YJ, You XZ. Tetraaquabis[2-(4-pyridyl)ethanesulfonato-N]zinc(II). Acta Crystallogr C 2000; 56 ( Pt 8):943-4. [PMID: 10944282 DOI: 10.1107/s0108270100007964] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2000] [Accepted: 05/30/2000] [Indexed: 11/10/2022] Open
Abstract
The title compound, [Zn(C(7)H(8)NO(3)S)(2)(H(2)O)(4)], has an octahedral coordination around the central Zn atom composed of two axial N atoms from the pyridine ligands and four equatorial O atoms of water molecules, forming a monomeric centrosymmetric complex. The two Zn-N bond distances are 2.102 (3) A, while the four Zn-O bond distances range from 2.114 (2) to 2.167 (2) A. Packing is determined by hydrogen bonds formed by the water molecules. The sulfonate group does not take part in coordination to the Zn atom.
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Affiliation(s)
- X R Zeng
- Department of Chemistry, Jian Normal College, 343009 Jian, Jiangxi, People's Republic of China.
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Wu SM, Zhang P, Zeng XR, Zhang SJ, Mo J, Li BQ, Lee MY. Characterization of the p125 subunit of human DNA polymerase delta and its deletion mutants. Interaction with cyclin-dependent kinase-cyclins. J Biol Chem 1998; 273:9561-9. [PMID: 9545286 DOI: 10.1074/jbc.273.16.9561] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The catalytic subunit of human DNA polymerase (pol) delta was overexpressed in an active, soluble form by the use of a baculovirus system in insect cells. The recombinant enzyme was separated from endogenous DNA polymerases by phosphocellulose, Mono Q-Sepharose, and single-stranded DNA-cellulose chromatography. Recombinant DNA pol delta was also purified by immunoaffinity chromatography. The enzymatic properties of the purified catalytic subunit were characterized. The enzyme was active and possessed both DNA polymerase and associated 3' to 5' exonuclease activities. NH2-terminal deletion mutants retained polymerase activity, whereas the core and COOH-terminal deletion mutants were devoid of any measurable activities. Coinfection of Sf9 cells with recombinant baculovirus vectors for pol delta and cyclin-dependent kinase (cdk)-cyclins followed by metabolic labeling with 32Pi showed that the recombinant catalytic subunit of pol delta could be hyperphosphorylated by G1 phase-specific cdk-cyclins. When cdk2 was coexpressed with pol delta in Sf9 cells, pol delta was found to coimmunoprecipitate with antibodies against cdk2. Experiments with deletion mutants of pol delta showed that the NH2-terminal region was essential for this interaction. Coimmunoprecipitation and Western blot experiments in Molt 4 cells confirmed the interaction in vivo. Preliminary experiments showed that phosphorylation of the catalytic subunit of pol delta by cdk2-cyclins had little or no effect on the specific activity of the enzyme.
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Affiliation(s)
- S M Wu
- Department of Biochemistry and Molecular Biology, University of Miami, Miami, Florida 33101, USA
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8
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Chai Q, Zeng XR. [Effect of cGMP on calcium-activated potassium channels in primary cultured porcine coronary artery smooth muscle cells]. Sheng Li Xue Bao 1998; 50:115-9. [PMID: 11324512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Guanosine 3',5'-cyclic monophosphate (cGMP) is capable of relaxing vascular smooth muscle through activating calcium-activated potassium channels (KCa channel) in the vascular smooth muscle cell membrane. But regarding the mechanism it is still under debate. In the present work the mechanism of the effect of cGMP on KCa channel in primary cultured porcine coronary artery smooth muscle cells using patch clamp technique was investigated. Experimental results showed that (1) different concentrations of 8-bromo-cGMP (0.25 mmol/L, 0.50 mmol/L, 1.00 mmol/L), serving as a membrane permeable analogue, could activate KCa channels, and (2) 1.00 mmol/L 8-bromo-cGMP could not activate such kind of channels in inside-out patch under the same condition. These results suggested that the activating effect of cGMP on KCa channels was indirect, being mediated by some intracellular process.
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Affiliation(s)
- Q Chai
- Department of Physiology, Shandong Academy of Medical Science, Jinan 250062
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Zhang SJ, Zeng XR, Zhang P, Toomey NL, Chuang RY, Chang LS, Lee MY. A conserved region in the amino terminus of DNA polymerase delta is involved in proliferating cell nuclear antigen binding. J Biol Chem 1995; 270:7988-92. [PMID: 7713898 DOI: 10.1074/jbc.270.14.7988] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Synthetic peptides to selected sequences in human DNA polymerase delta (pol delta) were used to identify the region involved in the interaction of pol delta to proliferating cell nuclear antigen. Peptides corresponding to sequences in five regions in the amino terminus of human pol delta and three in the carboxyl terminus, which are conserved with the yeast homologs of pol delta, were tested. These studies showed that the peptide corresponding to the N2 region (residues 129-149) selectively and specifically inhibited the PCNA stimulation of pol delta. This inhibition was relieved by titration with excess PCNA. The identification of the N-2 region as being involved in PCNA binding was supported by studies that demonstrated that the N2 peptide could bind PCNA. Deletion mutants of pol delta expressed in Sf9 cells provided evidence that the binding region for PCNA was located in the first 182 residues of the amino terminus. These studies provide reasonable evidence that residues within the region 129-149 of pol delta are involved in the binding site for PCNA.
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Affiliation(s)
- S J Zhang
- Department of Medicine, University of Miami School of Medicine, Florida 33101, USA
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10
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Zeng XR, Hao H, Jiang Y, Lee MY. Regulation of human DNA polymerase delta during the cell cycle. J Biol Chem 1994; 269:24027-33. [PMID: 7929054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The expression of polymerase delta (pol delta) during the cell cycle was studied in Molt 4 cells separated by counter-flow centrifugal elutriation. Northern blotting showed that pol delta mRNA levels increased by 3-fold at the G1/S border. Levels of pol delta protein determined by Western blotting also peaked at the G1/S border with qualitatively similar changes as the mRNA levels. Thus, pol delta gene expression appears to be regulated during the cell cycle at the transcriptional level. The mRNA half-life for pol delta was determined to be about 8 h and the protein half-life about 10 h. Parallel examination of the expression of proliferating cell nuclear antigen showed that the mRNA levels also increased about 2-fold at the G1/S border, while the protein levels of proliferating cell nuclear antigen increased steadily through the whole cell cycle period, and remained high at G2/M. Analysis of pol alpha expression showed qualitatively similar behavior as pol delta, but the magnitude of the changes were higher. Pulse labeling of cells metabolically arrested in G1,S, or G2/M with 32Pi showed that pol delta is a phosphoprotein and that it is most actively phosphorylated during the S phase.
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Affiliation(s)
- X R Zeng
- Department of Medicine, University of Miami School of Medicine, Florida 33101
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11
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Zeng XR, Jiang Y, Zhang SJ, Hao H, Lee MY. DNA polymerase delta is involved in the cellular response to UV damage in human cells. J Biol Chem 1994; 269:13748-51. [PMID: 7910606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
We have used antibodies specific for either polymerase delta (pol delta) or its accessory protein, proliferating cell nuclear antigen (PCNA), to demonstrate that they can markedly inhibit the capacity of HeLa nuclear extracts to effect repair of UV-damaged plasmid DNA. This provides the first unambiguous evidence for the involvement of pol delta in DNA repair synthesis. The mRNA levels of both pol delta and PCNA were significantly stimulated subsequent to UV irradiation of cultured cells, providing the first evidence that the cellular response to UV damage may involve regulation of pol delta and PCNA at the gene level. Thus, DNA polymerase delta and its accessory proteins, in addition to their function in replicative DNA synthesis, also function in DNA repair synthesis.
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Affiliation(s)
- X R Zeng
- Department of Medicine, University of Miami School of Medicine, Florida 33101
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12
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You WC, Blot WJ, Li JY, Chang YS, Jin ML, Kneller R, Zhang L, Han ZX, Zeng XR, Liu WD. Precancerous gastric lesions in a population at high risk of stomach cancer. Cancer Res 1993; 53:1317-21. [PMID: 8443811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A population-based screening for detection of early cancers evaluated the prevalence of precancerous gastric lesions in an area in Shandong province, China, with one of the world's highest rates of stomach cancer. A total of 3433 residents aged 35 to 64 yr received gastroscopical examinations with biopsies taken from standard locations. Chronic atrophic gastritis was nearly universal; less than 2% of the population had biopsies showing entirely normal mucosa or only superficial gastritis. Intestinal metaplasia was the most advanced lesion for 33% and gastric dysplasia for 20%, although the prevalence of each increased significantly with age. Intestinal metaplasia and gastric dysplasia were detected throughout the stomach, but the lesions were more pronounced along the lesser curvature, especially in the angulus and antrum. There was no sex difference in rates of chronic atrophic gastritis, but males had a slightly higher prevalence of intestinal metaplasia, a 1.6-fold increase in dysplasia, and a 3-fold excess of gastric cancer. The data quantify the extensiveness of gastric lesions likely to be involved in the natural history of stomach cancer in this high-risk population.
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Affiliation(s)
- W C You
- Beijing Institute for Cancer Research, China
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13
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You WC, Blot WJ, Zhang L, Kneller RW, Li JY, Jin ML, Chang YS, Zeng XR, Zhao L, Fraumeni JF. Serum pepsinogens in relation to precancerous gastric lesions in a population at high risk for gastric cancer. Cancer Epidemiol Biomarkers Prev 1993; 2:113-7. [PMID: 8467245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Concentrations of serum pepsinogens (PG) I and II were determined for 3252 randomly selected adults who participated in a population-based gastroscopic screening in an area of China with one of the world's highest rates of gastric cancer. PG I and II concentrations in both sexes tended to be higher than reported in other countries, with levels generally higher among males than females. PG I tended to decrease and PG II to increase with age, but the most pronounced associations were between PG I:II ratios and gastric histology. Median PG I:II ratios monotonically declined from 9.1 to 7.2 to 5.7 to 5.4 to 3.8 among those with superficial gastritis, chronic atrophic gastritis, intestinal metaplasia, dysplasia, and stomach cancer, respectively. The prevalence of dysplasia was nearly 3 times greater among those with PG I:II ratios less than 3 compared with those whose PG I:II ratios were greater than 10. While average levels differed significantly among the histologic groups, the PG I:II ratios were neither sensitive nor specific markers of an individual's likelihood of advanced gastric lesions in this population.
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Affiliation(s)
- W C You
- Beijing Institute for Cancer Research, China
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Minami K, Fukuzawa K, Nakaya Y, Zeng XR, Inoue I. Mechanism of activation of the Ca(2+)-activated K+ channel by cyclic AMP in cultured porcine coronary artery smooth muscle cells. Life Sci 1993; 53:1129-35. [PMID: 8396704 DOI: 10.1016/0024-3205(93)90549-i] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Activation of the Ca(2+)-activated K+ channel (KCa-channel) by adenosine 3', 5'-cyclic monophosphate (cAMP) and cAMP-dependent protein kinase (A-kinase) in cultured smooth muscle cells from porcine coronary artery was investigated using the patch-clamp technique. In cell-attached patches, the KCa-channel was activated when forskolin (10 microM) was applied to the bath. In excised inside-out patches, application of 50 microM cAMP to the bath activated the KCa-channel in the presence of A-kinase (10 units/ml) and ATP (1 mM). In addition, the KCa-channel was activated directly by application of cAMP to the cytoplasmic side of the membrane in the absence of A-kinase. The activation by cAMP or by A-kinase required intracellular Ca2+, and was enhanced by increase of intracellular Ca2+. At a low concentration (3 x 10(-7) M) of Ca2+, more than 2 mM cAMP was required for activation of the KCa-channel, but with 10(-6) M Ca2+, 100 microM cAMP was sufficient for activation. These results suggest that there are two mechanisms of activation of the KCa-channel by cAMP: direct activation, and indirect activation via phosphorylation of the channel by A-kinase.
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Affiliation(s)
- K Minami
- Faculty of Pharmaceutical Sciences, Tokushima University, Japan
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Tang M, Zhang GI, Zeng XR, Zhong JY, Zhang Y, Li SR. Relationship between action potential duration of ventricular cells and heart rate in dog under natural breathing. J Tongji Med Univ 1987; 7:148-52. [PMID: 3448239 DOI: 10.1007/bf02888208] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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