Article(id=1201177213510049908, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1201177206518145841, articleNumber=null, orderNo=null, doi=10.16438/j.0513-4870.2023-0601, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1683648000000, receivedDateStr=2023-05-10, revisedDate=1687104000000, revisedDateStr=2023-06-19, acceptedDate=null, acceptedDateStr=null, onlineDate=1764312564493, onlineDateStr=2025-11-28, pubDate=1704988800000, pubDateStr=2024-01-12, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1764312564493, onlineIssueDateStr=2025-11-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1764312564493, creator=13701087609, updateTime=1764312564493, updator=13701087609, issue=Issue{id=1201177206518145841, tenantId=1146029695717560320, journalId=1189982191388893191, year='2024', volume='59', issue='1', pageStart='1', pageEnd='268', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1764312562826, creator=13701087609, updateTime=1764312760268, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1201178034725417827, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1201177206518145841, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1201178034725417828, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1201177206518145841, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=143, endPage=151, ext={EN=ArticleExt(id=1201177213954646177, articleId=1201177213510049908, tenantId=1146029695717560320, journalId=1189982191388893191, language=EN, title=Melatonin inhibits arrhythmias induced by increased late sodium currents in ventricular myocytes, columnId=1190335348761793317, journalTitle=Acta Pharmaceutica Sinica, columnName=Original Articles, runingTitle=null, highlight=null, articleAbstract=
Melatonin (Mel) has been shown to have cardioprotective effects, but its action on ion channels is unclear. In this experiment, we investigated the inhibitory effect of Mel on late sodium currents (INa.L) in mouse ventricular myocytes and the anti-arrhythmic effect at the organ level as well as its mechanism. The whole-cell patch clamp technique was applied to record the ionic currents and action potential (AP) in mouse ventricular myocytes while the electrocardiogram (ECG) and monophasic action potential (MAP) were recorded simultaneously in mouse hearts using a multichannel acquisition and analysis system. The results demonstrated that the half maximal inhibitory concentration (IC50) values of Mel on transient sodium current (INa.T) and specific INa.L opener 2 nmol·L-1 sea anemone toxins Ⅱ (ATX Ⅱ) increased INa.L were 686.615 and 7.37 μmol·L-1, respectively. Mel did not affect L-type calcium current (ICa.L), transient outward current (Ito), and AP. In addition, 16 μmol·L-1 Mel shortened ATX Ⅱ-prolonged action potential duration (APD), suppressed ATX Ⅱ-induced early afterdepolarizations (EADs), and significantly reduced the incidence of ventricular tachycardia (VT) and ventricular fibrillation (VF) in Langendorff-perfused mouse hearts. In conclusion, Mel exerted its antiarrhythmic effects principally by blocking INa.L, thus providing a significant theoretical basis for new clinical applications of Mel. Animal welfare and experimental process are in accordance with the regulations of the Experimental Animal Ethics Committee of Wuhan University of Science and Technology (2023130).
, correspAuthors=Ji-hua MA, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2024 Acta Pharmaceutica Sinica. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Jie WEN, Han-feng LIU, Yan-yan YANG, Ze-fu ZHANG, An-tao LUO, Zhen-zhen CAO, Ji-hua MA), CN=ArticleExt(id=1201177215754002758, articleId=1201177213510049908, tenantId=1146029695717560320, journalId=1189982191388893191, language=CN, title=褪黑激素抑制心室肌细胞晚钠电流增大所诱发的心律失常, columnId=1190335348896011050, journalTitle=药学学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
褪黑激素(melatonin, Mel) 已有研究表明其具有心脏保护作用, 但对离子通道作用尚不清楚。本实验探究了Mel对小鼠心室肌细胞晚钠电流(late-sodium current, INa.L) 的抑制作用、在器官水平上的抗心律失常作用及其机制。采用膜片钳技术全细胞模式记录离子电流和动作电位(action potential, AP), 利用多通道采集分析系统同步记录小鼠心电图(electrocardiogram, ECG) 和单相动作电位(monophasic action potential, MAP)。结果显示, Mel抑制瞬时钠电流(transient-sodium current, INa.T) 和特异性INa.L开放剂2 nmol·L-1海葵毒素Ⅱ (anemone toxins Ⅱ, ATX Ⅱ) 诱导增大的INa.L, 其IC50值分别为686.615和7.37 μmol·L-1, 且Mel不影响L型钙电流(L-type calcium current, ICa.L)、瞬时外向钾电流(transient outward current, Ito) 和AP。此外, 16 μmol·L-1 Mel可缩短ATX Ⅱ延长的动作电位时程(action potential duration, APD), 并消除了由ATX Ⅱ诱导的早发后除极(early afterdepolarizations, EADs)。在Langendorff灌流的小鼠心脏上, 16 μmol·L-1 Mel显著降低了室速(ventricular tachycardia, VT) 和室颤(ventricular fibrillation, VF) 的发生率。综上所述, Mel主要通过阻断INa.L发挥抗心律失常作用, 为Mel的临床新应用提供了重要的理论基础。本研究动物福利和实验过程均遵循武汉科技大学实验动物伦理委员会的规定(批准号: 2023130)。
, correspAuthors=马季骅, authorNote=null, correspAuthorsNote=
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College of Life Science and Health, Wuhan University of Science and Technology, Wuhan 430070, China), AuthorCompanyExt(id=1201189468842713834, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, companyId=1201189468825936616, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2.武汉科技大学生命科学与健康学院, 湖北 武汉 430070)])], figs=[ArticleFig(id=1201189471447376667, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=EN, label=null, caption=null, figureFileSmall=bvR6PtIfq5OgRH+1fc9XiQ==, figureFileBig=ivuu2O6SxwnQQNCDQCMgGg==, tableContent=null), ArticleFig(id=1201189471510291228, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=CN, label=Figure 1, caption=
The effects of melatonin (Mel) on late sodium current (INa.T) in mouse ventricular myocytes. A: Example records of the single INa.T of control group and Mel (250, 500, 750 and 1 000 µmol·L-1) groups; B: Transient-sodium current (INa.T) in the control group and at different concentrations (250, 500, 750, 1 000 μmol·L-1) under the effect of Mel; C: The I-V relationship curves of melatonin action on INa.T. n = 6, $\overline{x}\pm s$. *P < 0.05 vs control; D: The concentration-effect curves fitted by Hill's equation using the percentage inhibition of INa.T by Mel; E: The comparison of INa.T percentile values among the control, 1 000 µmol·L-1 Mel, wash out group. n = 10, x ± s. *P < 0.05, **P < 0.01 , figureFileSmall=bvR6PtIfq5OgRH+1fc9XiQ==, figureFileBig=ivuu2O6SxwnQQNCDQCMgGg==, tableContent=null), ArticleFig(id=1201189471615148829, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=EN, label=null, caption=null, figureFileSmall=3vhKmSFqDeac3s9/6yuOeg==, figureFileBig=qVl+BVP3wRIeliw/YyLcQg==, tableContent=null), ArticleFig(id=1201189471682257694, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=CN, label=Figure 2, caption=
The effects of Mel on INa.L in mouse ventricular myocytes. A: Example records of anemone toxins Ⅱ (ATX Ⅱ) increased-INa.L at membrane potentials of -80, -60, -50, -40, and -20 mV from the same cell for the control group, ATX Ⅱ group, and Mel groups (2, 4, and 8 µmol·L-1); B: The I-V relationships curves for the effects of Mel on ATX Ⅱ-increased INa.L. n = 11, $\overline{x}\pm s$. *P < 0.05 vs control; C: The concentration-response relationship curve of Mel on the single basal ATX Ⅱ-increased INa.L; D: Example plots of the inhibitory effect of Mel at different concentrations (2, 4, 8, 16 μmol·L-1) on ATX Ⅱ-increased INa.L in the same ventricular myocytes; E: Example records of INa.L of control, 2 nmol·L-1 ATX Ⅱ, and 2 μmol·L-1 TTX group; F: The comparison of INa.L percentile values among the 2 nmol·L-1 ATX Ⅱ, and 2 nmol·L-1 ATX Ⅱ + 2 μmol·L-1 TTX group. n = 8, $\overline{x}\pm s$. G: Example plots of 16 μmol·L-1 Mel on 2 nmol·L-1 ATX Ⅱ-increased INa.L before and after intervention and reperfusion; H: The comparison of INa.L percentile values among the 2 nmol·L-1 ATX Ⅱ, 2 nmol·L-1 ATX Ⅱ + 16 μmol·L-1 Mel, wash out group. n = 9, $\overline{x}\pm s$. *P < 0.05; ***P < 0.001 , figureFileSmall=3vhKmSFqDeac3s9/6yuOeg==, figureFileBig=qVl+BVP3wRIeliw/YyLcQg==, tableContent=null), ArticleFig(id=1201189471753560863, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=EN, label=null, caption=null, figureFileSmall=3BuW7RzWoIsWGXSva2xFKQ==, figureFileBig=OHb3co6bYmU7kZPpHefHeg==, tableContent=null), ArticleFig(id=1201189471816475424, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=CN, label=Figure 3, caption=
The effects of Mel on L-type calcium current (ICa.L), transient outward current (Ito) and action potential (AP) in mouse ventricular myocytes. A, B: The representative traces of ICa.L, Ito in the absence and presence of Mel 50 μmol·L-1; C: Example records of APs from the control group, Mel group, and wash out group in the same ventricular myocyte; D, E: The comparisons of the average action potential duration at 50% (APD50) and action potential duration at 90% (APD90) percentage values of the control group, Mel group at 20 and 50 μmol·L-1. n = 7, x ± s , figureFileSmall=3BuW7RzWoIsWGXSva2xFKQ==, figureFileBig=OHb3co6bYmU7kZPpHefHeg==, tableContent=null), ArticleFig(id=1201189471883584289, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=EN, label=null, caption=null, figureFileSmall=c7lIJWNFo5Kp5HhHtdDfLw==, figureFileBig=AEKfzCj6X7quWZbBFlZy9g==, tableContent=null), ArticleFig(id=1201189471980053282, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=CN, label=Figure 4, caption=
The effects of Mel on the prolonged APD and early afterdepolarizations (EADs) in mouse ventricular myocytes. A-D: Example records of APs from the control group, 2 nmol·L-1 ATX Ⅱ group, 16 μmol·L-1 Mel treated group, and wash out group in the same ventricular myocyte, respectively; E: The comparison of average APD90 values of the control, 2 nmol·L-1 ATX Ⅱ, 2 nmol·L-1 ATX Ⅱ+ 16 μmol·L-1 Mel, wash out group. n = 10, $\overline{x}\pm s$. ***P < 0.001; F: Example records of single APs at a frequency of 1 Hz on the control, 2 nmol·L-1 ATX Ⅱ, 2 nmol·L-1 ATX Ⅱ + 16 μmol·L-1 Mel, wash out group , figureFileSmall=c7lIJWNFo5Kp5HhHtdDfLw==, figureFileBig=AEKfzCj6X7quWZbBFlZy9g==, tableContent=null), ArticleFig(id=1201189472042967843, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=EN, label=null, caption=null, figureFileSmall=MwuUmq+k75iUqNvztN/5xQ==, figureFileBig=S7siAPPbG3LodogK2Slf4g==, tableContent=null), ArticleFig(id=1201189472101688100, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=CN, label=Figure 5, caption=
The effect of Mel on ATX Ⅱ-induced arrhythmia in isolated mouse hearts. Representative recordings of monophasic action potential (MAP) and electrocardiogram (ECG) of the isolated hearts in the 5 nmol·L-1 ATX Ⅱ group (A) and 5 nmol·L-1 ATX Ⅱ + 16 μmol·L-1 Mel group (B); C: The comparison of the incidence of ventricular fibrillation (VF) and ventricular tachycardia (VT) in the 5 nmol·L-1 ATX Ⅱ group and the 5 nmol·L-1 ATX Ⅱ + 16 μmol·L-1 Mel group. n =10, $\overline{x}\pm s$. *P < 0.05, **P < 0.01; D: The comparison of average duration of VF and VT after reperfusion in the 5 nmol·L-1 ATX Ⅱ group and the 5 nmol·L-1 ATX Ⅱ + 16 μmol·L-1 Mel group , figureFileSmall=MwuUmq+k75iUqNvztN/5xQ==, figureFileBig=S7siAPPbG3LodogK2Slf4g==, tableContent=null), ArticleFig(id=1201189472164602661, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=EN, label=null, caption=null, figureFileSmall=Rt8EZ3IVNhHauW4NDmt8Ng==, figureFileBig=Dk7cJfoXQROpMDrhO27wuw==, tableContent=null), ArticleFig(id=1201189472248488742, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1201177213510049908, language=CN, label=Figure 6, caption=
Effect of inhibitors of calmodulin-dependent protein kinases Ⅱ (CaMKII) (KN-93) and Mel on INa.L in mouse ventricular myocytes. A: INa.L in cells treated with Mel (16 μmol·L-1) first and then treated with KN-93 (10 μmol·L-1) and Mel (16 μmol·L-1) at 1 μmol·L-1 [Ca2+]I; B: INa.L in cells treated with KN-93 (10 μmol·L-1) first and then treated with Mel (16 μmol·L-1) at 1 μmol·L-1 [Ca2+]I; C, D: The mean current densities of INa.L at 1 μmol·L-1 [Ca2+]i before and after drug treatment. n = 8, $\overline{x}\pm s$. *P < 0.05. KN-93: N-[2-(N-(4-Chlorine cinnamon)-N-methyl amino methyl)phenyl]-N-(2-hydroxyethyl)-4-methoxy benzene sulfonamide phosphate , figureFileSmall=Rt8EZ3IVNhHauW4NDmt8Ng==, figureFileBig=Dk7cJfoXQROpMDrhO27wuw==, tableContent=null)], attaches=null, journal=Journal(id=1189982048455397383, delFlag=0, nameCn=药学学报, nameEn=Acta Pharmaceutica Sinica, nameHistory1=null, nameHistory2=null, issn=0513-4870, eissn=null, cn=11-2163/R, coden=null, periodic=0, language=CN, oaType=null, ccby=null, superviseOffice=null, ownerOffice=null, pubOffice=null, editorOffice=null, officeType=null, aims=null, clcCode=null, officeProv=null, officeCity=null, officeAddr=null, officeZip=null, officeEmail=null, officePhone=null, editDirector=null, officeDirector=null, officeDirectorPhone=null, officeStaffNum=null, officeEmpNum=null, coverPicUrl=BTxjudbJDVO4PqdBR6On6Q==, journalPrice=null, startedYear=null, abbrevIsoEn=null, journalRemark=null, publicationField=null, createdTime=1761643429151, updatedTime=1761735768113, 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