Article(id=1200394160558698732, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1200394147019477416, articleNumber=null, orderNo=null, doi=10.16438/j.0513-4870.2024-0156, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1708617600000, receivedDateStr=2024-02-23, revisedDate=1713974400000, revisedDateStr=2024-04-25, acceptedDate=null, acceptedDateStr=null, onlineDate=1764125870121, onlineDateStr=2025-11-26, pubDate=1720713600000, pubDateStr=2024-07-12, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1764125870121, onlineIssueDateStr=2025-11-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1764125870121, creator=13701087609, updateTime=1764125870121, updator=13701087609, issue=Issue{id=1200394147019477416, tenantId=1146029695717560320, journalId=1189982191388893191, year='2024', volume='59', issue='7', pageStart='1897', pageEnd='2182', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1764125866894, creator=13701087609, updateTime=1764225115484, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200810425920115296, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1200394147019477416, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200810425920115297, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1200394147019477416, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=2002, endPage=2011, ext={EN=ArticleExt(id=1200394161213010198, articleId=1200394160558698732, tenantId=1146029695717560320, journalId=1189982191388893191, language=EN, title=Establishment and optimization of drug screening model for N-type voltage-gated calcium channels in
Xenopus laevis oocyte expression system, columnId=1190335348761793317, journalTitle=Acta Pharmaceutica Sinica, columnName=Original Articles, runingTitle=null, highlight=null, articleAbstract=
N-type voltage-gated calcium (Ca2+) channels (N-type VGCC, CaV2.2) mediate Ca2+ influx in response to action potential at the presynaptic terminal, and play an important role in synaptogenesis, neurotransmitter release and nociceptive signal transduction. It is a new target for the development of drugs for the treatment of neuralgia (chronic pain) and other major diseases. Due to the difficulty of calcium channel expression in vitro and the detection of channel current, there is a great lack of new drug screening models. In this study, we established and optimized the electrophysiological drug screening model using Xenopus laevis oocytes for the recombinant expression of CaV2.2 in vitro (this study were reviewed and approved by the Ethics Committee of Guangxi University, approval number: GXU-2023-0249). Firstly, the linear plasmids encoding cDNA of major subunit α1B and auxiliary subunits α2δ1 and β3 of rat CaV2.2 were used as templates for in vitro transcription to generate their related mRNA (cRNA), after which three kinds of cRNA were injected into Xenopus laevis oocytes at the mass ratio of 2∶1∶1 for expression. The two-electrode voltage clamp (TEVC) technique was used to detect the inward current produced by CaV2.2. At the same time, the expression conditions of CaV2.2 were optimized, and its gating function was characterized from the aspects of channel activation and inactivation. The results showed that 3-5 days after cRNA microinjection, stable CaV2.2-mediated barium ion (Ba2+) currents were successfully detected. The interference of endogenous potassium channels and Ca2+-activated chloride channels can be eliminated by tetraethylammonium hydroxide (TEAOH) and 1, 2-bis(2-aminophenoxy)ethane-N, N, N', N'-tetraacetic acid tetrakis (BAPTA-AM) treatment. The maximum potential for CaV2.2 activation is 0 mV, and the current reverses to be outward when the membrane potential is greater than +50 mV. By fitting the steady-state activation and inactivation curves, the half-maximal activation potential and half-maximal inactivation potential of CaV2.2 are identified as -15.9 and -60.2 mV. In this study, a stable CaV2.2 expression system was established based on Xenopus laevis oocytes. The in vitro expression system can provide a new way for the screening of CaV2.2 active compounds or lead drugs.
, correspAuthors=Jin-peng YU, Su-lan LUO, 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=Yuan QIN, Cheng CUI, Xiao-peng ZHU, Dong-ting ZHANGSUN, Jin-peng YU, Su-lan LUO), CN=ArticleExt(id=1200394166359421514, articleId=1200394160558698732, tenantId=1146029695717560320, journalId=1189982191388893191, language=CN, title=非洲爪蟾卵母细胞表达系统中N-型电压门控钙离子通道新药筛选模型的建立与优化, columnId=1190335348896011050, journalTitle=药学学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
N-型电压门控钙离子(Ca2+) 通道(N-type voltage-gated calcium channel, N-type VGCC, CaV2.2) 在突触前末端响应动作电位介导Ca2+内流, 并在突触发生、神经递质释放和伤害性信号传递中发挥重要作用, 是神经痛(慢性痛) 等重大疾病治疗药物研发的关键靶点。由于钙离子通道体外表达困难, 通道电流检测技术复杂, 其新药筛选模型极其缺乏。因此, 本研究利用非洲爪蟾卵母细胞表达系统, 进行CaV2.2体外重组表达, 建立电生理学技术药物筛选模型, 并对该表达技术体系进行了优化(本研究获得广西大学伦理委员会审查批准, 批准号: GXU-2023-0249)。首先, 以大鼠CaV2.2的主亚基α1B及其辅助亚基α2δ1和β3的cDNA基因为模板, 分别在体外进行转录, 人工合成了CaV2.2 3个亚基的mRNA (cRNA), 按照2∶1∶1的质量比混合, 将3种cRNA注射到非洲爪蟾卵母细胞中进行表达。随后使用双电极电压钳技术检测CaV2.2离子通道是否产生细胞膜内向电流, 同时对各个表达条件进行了优化, 从通道的激活、失活等方面表征了其门控功能。结果显示, 在cRNA显微注射后的第3~5天, 使用四乙基氢氧化铵(TEAOH) 和1, 2-双(2-氨基苯氧基)乙烷-N, N, N', N'-四乙酸四酯(BAPTA-AM) 处理, 可分别消除内源性钾离子通道和Ca2+激活的氯离子通道干扰, 成功检测到稳定的CaV2.2介导的钡离子电流。CaV2.2的最大激活膜电位为0 mV, 当膜电位大于+50 mV时会出现电流方向反转。通过拟合稳态激活和失活曲线获知CaV2.2的半激活电位和半失活电位分别为-15.9和-60.2 mV。本研究基于非洲爪蟾卵母细胞, 通过条件优化, 建立了稳定的CaV2.2表达系统。该体外表达系统可以为靶向CaV2.2活性化合物或先导药物的筛选提供新的途径。
, correspAuthors=于津鹏, 罗素兰, authorNote=null, correspAuthorsNote=
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α-conotoxin Vt1.27 inhibits N-type calcium channels with potent anti-allodynic effect [J]. Front Pharmacol, 2022, 13: 881732., articleTitle=null, refAbstract=null)], funds=[Fund(id=1200470900828140118, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, awardId=2022YFE0132700, language=CN, fundingSource=国家重点研发计划项目(2022YFE0132700), fundOrder=null, country=null), Fund(id=1200470900970746462, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, awardId=2022GXNSFBA035662, language=CN, fundingSource=广西自然科学基金资助项目(2022GXNSFBA035662), fundOrder=null, country=null), Fund(id=1200470901117547107, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, awardId=82104059, language=CN, fundingSource=国家自然科学基金资助项目(82104059), fundOrder=null, country=null), Fund(id=1200470901218210409, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, awardId=桂科AD22035948, language=CN, fundingSource=广西科技基地和人才专项(桂科AD22035948), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1200470894226305197, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, xref=null, ext=[AuthorCompanyExt(id=1200470894238888112, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, companyId=1200470894226305197, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Guangxi Key Laboratory of Special Biomedicine, School of Medicine, Guangxi University, Nanning 530004, China), AuthorCompanyExt(id=1200470894243082416, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, companyId=1200470894226305197, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=广西大学医学院, 广西特色生物医药重点实验室, 广西 南宁 530004)])], figs=[ArticleFig(id=1200470898647101944, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=EN, label=null, caption=null, figureFileSmall=IeLdp9VLOuTiUI12lhJNsw==, figureFileBig=y+1nnmMhbFDFjnLeJCcikw==, tableContent=null), ArticleFig(id=1200470898831651327, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=CN, label=Figure 1, caption=
Classification and nomenclature of voltage-gated calcium channels (VGCCs). VGCCs were historically first divided into high voltage-activated (HVA) and low voltage-activated (LVA) calcium channels according to their activation threshold. Based on the types of Ca2+ current, VGCCs are categorized into 5 members (L-, P/Q-, N-, R- and T-types VGCCs). The latest research indicated that VGCCs could be further classified into three sub families based on α1 subunit homology (CaV1, CaV2, and CaV3) , figureFileSmall=IeLdp9VLOuTiUI12lhJNsw==, figureFileBig=y+1nnmMhbFDFjnLeJCcikw==, tableContent=null), ArticleFig(id=1200470899024589321, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=EN, label=null, caption=null, figureFileSmall=rr3F7t2Crh0aum+iPaIdMA==, figureFileBig=ZWrGxJ7TICE6x/yOlTS8PA==, tableContent=null), ArticleFig(id=1200470899158807057, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=CN, label=Figure 2, caption=
Identification of plasmids, linearized products and cRNAs of rα1B, rα2δ1 and rβ3 subunits by agarose gel electrophoresis. A: M: DL10 000 DNA marker; 1: Plasmid encoding rα1B subunit; 2: Linearized plasmid encoding rα1B subunit; 3: Plasmid encoding rα2δ1 subunit; 4: Linearized plasmid encoding rα2δ1 subunit; 5: Plasmid encoding rβ3 subunit; 6: Linearized plasmid encoding rβ3 subunit; B: M: 500-9 000 bases ssRNA ladder; 1: cRNA of rα1B subunit; 2: cRNA of rα2δ1 subunit; 3: cRNA of rβ3 subunit; C: 1: rα1B subunit cRNA obtained by transcription for 7 h; 2: rα1B subunit cRNA obtained by transcription for 16 h; 3: rα1B subunit cRNA obtained by transcription for 10 h; M: 500-9 000 bases ssRNA ladder , figureFileSmall=rr3F7t2Crh0aum+iPaIdMA==, figureFileBig=ZWrGxJ7TICE6x/yOlTS8PA==, tableContent=null), ArticleFig(id=1200470899318190618, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=EN, label=null, caption=null, figureFileSmall=wyghDdozarTobvE3DgBwSA==, figureFileBig=qDgsxV1HeVJJdz2GUBX5yA==, tableContent=null), ArticleFig(id=1200470899431436831, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=CN, label=Figure 3, caption=
Electrophysiological evaluation of CaV2.2 expressed in oocytes. A, B: The steady-state activation current of CaV2.2 induced by a series of 200 ms depolarizing pulses from -60 mV to +60 mV in 10 mV increments after incubation with 100 μmol·L-1 BAPTA-AM for 4 h (A) or 2 h (B); C: The current of CaV2.2 induced by 0 mV depolarizing pulse after incubation with 100 μmol·L-1 BAPTA-AM for 4 h , figureFileSmall=wyghDdozarTobvE3DgBwSA==, figureFileBig=qDgsxV1HeVJJdz2GUBX5yA==, tableContent=null), ArticleFig(id=1200470899553071652, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=EN, label=null, caption=null, figureFileSmall=ev2WvGkD5EUKo/lMUH/Gfg==, figureFileBig=1KoTD/E1wp4UVn+OBKKZJQ==, tableContent=null), ArticleFig(id=1200470899670512168, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=CN, label=Figure 4, caption=
Voltage dependence analysis of steady-state activation of CaV2.2. A: The I-V curve of CaV2.2 obtained by fitting the activation currents induced by different test potentials; B: Steady-state activation curve of CaV2.2. The results were normalized to the conductance-voltage (G/V) relationship, and the curve fits to Boltzman equation. n = 8, x ± SEM , figureFileSmall=ev2WvGkD5EUKo/lMUH/Gfg==, figureFileBig=1KoTD/E1wp4UVn+OBKKZJQ==, tableContent=null), ArticleFig(id=1200470899779564079, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=EN, label=null, caption=null, figureFileSmall=WsV8A+J2ev+j4GdebzYR9g==, figureFileBig=CmZFyBos/TKpZTGm/kicPA==, tableContent=null), ArticleFig(id=1200470899901198899, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=CN, label=Figure 5, caption=
Voltage dependence analysis of steady-state inactivation of CaV2.2. A: Steady-state inactivation current traces of CaV2.2 elicited by a 0 mV test potential after a series of 10 s prepulses ranging from -100 mV to -10 mV in 5 mV increments; B: Steady-state inactivation curve of CaV2.2. The electrophysiological results were fitted by Boltzman equation. n = 6, x ± SEM , figureFileSmall=WsV8A+J2ev+j4GdebzYR9g==, figureFileBig=CmZFyBos/TKpZTGm/kicPA==, tableContent=null), ArticleFig(id=1200470900035416636, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=EN, label=null, caption=null, figureFileSmall=9wkA1U41HRwepRYkIu2Aag==, figureFileBig=LhJJWKmUaCFUbN3UeziHUw==, tableContent=null), ArticleFig(id=1200470900203188799, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=CN, label=Figure 6, caption=
Kinetic analysis of CaV2.2 inactivation. A: Inactivation time course of CaV2.2 during 5 s depolarizing pulses to 0 mV starting from a holding potential of -100 mV; B: Analysis of inactivation process of CaV2.2. The results were fitted by a double exponential function. n = 7, x ± SEM , figureFileSmall=9wkA1U41HRwepRYkIu2Aag==, figureFileBig=LhJJWKmUaCFUbN3UeziHUw==, tableContent=null), ArticleFig(id=1200470900329017928, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=EN, label=null, caption=null, figureFileSmall=0+snMZU7DUUdNZPs96D92w==, figureFileBig=2bw+VAra0/jsmiKp/Xv0QA==, tableContent=null), ArticleFig(id=1200470900475818571, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1200394160558698732, language=CN, label=Figure 7, caption=
Time-dependent analysis of CaV2.2 recovery from steady-state inactivation. A: The current of CaV2.2 showing recovery from inactivation caused by 5 s pre-stimulation. Red: Current obtained by different recovery time; Black: Current without pre-stimulation inactivation; B: The CaV2.2 recovery time course was fitted to a double exponential function. n = 7, x ± SEM , figureFileSmall=0+snMZU7DUUdNZPs96D92w==, figureFileBig=2bw+VAra0/jsmiKp/Xv0QA==, 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, 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