Article(id=1308817752312349616, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308817633789698171, articleNumber=null, orderNo=null, doi=10.16438/j.0513-4870.2025-0760, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1751472000000, receivedDateStr=2025-07-03, revisedDate=1760112000000, revisedDateStr=2025-10-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1789976068808, onlineDateStr=2026-09-21, pubDate=1770825600000, pubDateStr=2026-02-12, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789976068808, onlineIssueDateStr=2026-09-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789976068808, creator=13701087609, updateTime=1789976068808, updator=13701087609, issue=Issue{id=1308817633789698171, tenantId=1146029695717560320, journalId=1189982191388893191, year='2026', volume='61', issue='2', pageStart='321', pageEnd='676', issueExtLink='null', onlineDate='null', pubDate='1770825600000', pubDateStr='2026-02-12', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1789976040551, creator='13701087609', updateTime=1789984264575, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1308852127921963901, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308817633789698171, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1308852127921963902, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308817633789698171, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=494, endPage=503, ext={EN=ArticleExt(id=1308817753939739570, articleId=1308817752312349616, tenantId=1146029695717560320, journalId=1189982191388893191, language=EN, title=
In vitro selection of modified ribozymes with metal-independent RNA-cleaving activity, columnId=1190335348761793317, journalTitle=Acta Pharmaceutica Sinica, columnName=Original Articles, runingTitle=null, highlight=null, articleAbstract=
Ribozymes and DNAzymes are limited in their applications as nucleic acid therapeutics due to their strong dependence on metal ions. Therefore, the development of novel metal-independent ribozymes has become a key research focus. This study evaluated the fidelity of wild-type Tgo DNA polymerase in simultaneously incorporating sugar backbone-modified 2'-deoxy-2'-fluoroarabinonucleic acid (FANA) along with base-modified DNA, constructed a modified nucleotide library containing four modified nucleotides, and employed systematic evolution of ligands by exponential enrichment (SELEX) technology to select ribozymes with RNA cleavage activity. Unlike conventional methods for selecting modified functional nucleic acids, the modified library here was directly used as templates for PCR amplification, eliminating the reverse transcription step which copies the modified phenotypic functional sequence into unmodified cDNA, and dramatically simplified the screening process. This study employed an RNA substrate region composed of 15 consecutive ribonucleosides for selection. Through sequence homology analysis and secondary structure prediction, we verified the cleavage activity of the top twenty abundant sequences obtained from sequencing the most active round 4 library. A sequence denoted R4-11 with considerably high RNA cleavage activity was successfully identified, and it preferentially cleaves the phosphodiester linkage between the rC-rA dinucleotide. This study provides a method for selecting ribozymes composed of diverse modified nucleotides and offers novel tools for disease-targeted therapy through mRNA silencing.
, authors=Xin LIU
1, 2, Ruo-yi XU
1, 2, You-min YING
1, *, Ya-jun WANG
2, *, authorsList=Xin LIU, Ruo-yi XU, You-min YING, Ya-jun WANG, authorCompany=null, correspAuthors=You-min YING, Ya-jun WANG, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2026 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, fund=null), CN=ArticleExt(id=1308817755726513089, articleId=1308817752312349616, tenantId=1146029695717560320, journalId=1189982191388893191, language=CN, title=具有RNA切割活性且不依赖金属离子的修饰核酶筛选, columnId=1190335348896011050, journalTitle=药学学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
核酶和脱氧核酶因其催化活性高度依赖金属离子, 限制了其在核酸药物领域的应用, 因此开发不依赖金属离子的修饰核酶成为研究热点。本研究测试了野生型Tgo DNA聚合酶同时识别两种糖环修饰的2'-氟代阿拉伯糖核苷酸和两种碱基修饰的脱氧核糖核苷酸的活性和忠实性, 构建了含有这4种修饰核苷酸的修饰文库, 利用指数富集配体的系统进化(systematic evolution of ligands by exponential enrichment, SELEX) 技术筛选出具有RNA切割活性的修饰核酶。与传统方法不同, 本研究以修饰文库为模板直接进行PCR扩增, 减少逆转录反应步骤, 简化了筛选流程。本研究以全RNA底物为靶标进行筛选, 通过对测序结果的同源性分析和二级结构预测, 验证了富集序列中拷贝数前20序列的切割活性。结果表明, 修饰核酶R4-11具有RNA切割活性, 并鉴定了其选择性切割位于rC-rA之间的磷酸二酯键。本研究为修饰核酶的筛选提供了模式和平台, 并为沉默疾病相关mRNA的靶向治疗提供了新型工具。
, authors=刘鑫
1, 2, 徐若毅
1, 2, 应优敏
1, *, 王雅俊
2, *, authorsList=刘鑫, 徐若毅, 应优敏, 王雅俊, authorCompany=null, correspAuthors=应优敏, 王雅俊, authorNote=
作者贡献:
刘鑫负责完成实验、数据整理和论文撰写与修改; 徐若毅提供修饰核苷酸底物; 应优敏指导论文修改; 王雅俊指导实验设计及论文修改。
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, copyrightStatement=版权所有©《药学学报》编辑部2026, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=DPgf1wKL1wQBnEc8xGn0uQ==, magXml=dYSEjXv7VGB7tMFxpasRmA==, pdfUrl=null, pdf=gmKbgWMeONU1rE08fDkcsw==, pdfFileSize=2100084, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=0Cwc6zKtTJ230ifRRfUHQw==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=99wP4Yzn0+j4fl2m0Zcgvw==, mapNumber=null, fund=null)}, authors=[Author(id=1308817958294618508, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1308817958382698895, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, authorId=1308817958294618508, language=EN, stringName=Xin LIU, firstName=Xin, middleName=null, lastName=LIU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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Fidelity assessment of wild-type Tgo DNA polymerase for the simultaneous incorporation of four modified nucleotides. A: The chemical structures of four modified nucleotides; B: Schematic representation of measuring the replication fidelity of wild-type Tgo DNA polymerase for synthesizing modified nucleic acid chains composed fully modified nucleotides, figureFileSmall=Tg6hq6bWxxN2IxKLvO1uCw==, figureFileBig=0Cwc6zKtTJ230ifRRfUHQw==, tableContent=null), ArticleFig(id=1308817960345633197, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=EN, label=null, caption=null, figureFileSmall=IzZNbz83c+hdlynGnJrLHw==, figureFileBig=iY83tRWGYRboMfC0kCgeVg==, tableContent=null), ArticleFig(id=1308817960412742062, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=CN, label=Fig.2, caption=
In vitro selection of modified nucleotides for sequence-specific RNA cleavage. A: 5'-Biotinylated unimolecular constructs used for in vitro selection; B: In vitro selection scheme for RNA-cleaving modified ribozymes, figureFileSmall=IzZNbz83c+hdlynGnJrLHw==, figureFileBig=iY83tRWGYRboMfC0kCgeVg==, tableContent=null), ArticleFig(id=1308817960484045231, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=EN, label=null, caption=null, figureFileSmall=b9mFvH7p/vl6qzGUieQDBg==, figureFileBig=9P1PkH8BAAlUa5K4nEut8w==, tableContent=null), ArticleFig(id=1308817960563737008, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=CN, label=Fig.3, caption=
Fidelity profile observed for four modified nucleotides replication using wild-type Tgo DNA polymerase, figureFileSmall=b9mFvH7p/vl6qzGUieQDBg==, figureFileBig=9P1PkH8BAAlUa5K4nEut8w==, tableContent=null), ArticleFig(id=1308817960635040177, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=EN, label=null, caption=null, figureFileSmall=ox07x13oFlSDm3cZZT5uSw==, figureFileBig=bQKNilryq3NV+2lgao7fIQ==, tableContent=null), ArticleFig(id=1308817960714731954, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=CN, label=Fig.4, caption=
Preparation of modified libraries and optimization of direct PCR conditions. A: Primer extension reactions with different substrates; B: Optimization of extension temperature in direct PCR amplification, figureFileSmall=ox07x13oFlSDm3cZZT5uSw==, figureFileBig=bQKNilryq3NV+2lgao7fIQ==, tableContent=null), ArticleFig(id=1308817960790229427, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=EN, label=null, caption=null, figureFileSmall=qbFEEoSuW7kKY2K80wq6ow==, figureFileBig=IcX2lnG2dWO+w+VKsfE/ug==, tableContent=null), ArticleFig(id=1308817960874115508, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=CN, label=Fig.5, caption=
Confirm cleavage activity of R4-11. A: Representative urea-PAGE showing the RNA cleavage activity of R4-11; B: Secondary structure of R4-11, figureFileSmall=qbFEEoSuW7kKY2K80wq6ow==, figureFileBig=IcX2lnG2dWO+w+VKsfE/ug==, tableContent=null), ArticleFig(id=1308817960937030069, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=EN, label=null, caption=null, figureFileSmall=XwfNrTHy1d4Y7/F02lrqPQ==, figureFileBig=Zrudz3+A1/HbLluMCe7u4A==, tableContent=null), ArticleFig(id=1308817961004138934, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=CN, label=Fig.6, caption=
Divalent metal ions dependency analysis of R4-11. A: Representative urea-PAGE showing the RNA cleavage activity of R4-11 in the presence of 0.5 mmol·L-1 different divalent metal ions; B: Effect of divalent metal ions on the cleavage activity of R4-11. n = 3, x ± s, figureFileSmall=XwfNrTHy1d4Y7/F02lrqPQ==, figureFileBig=Zrudz3+A1/HbLluMCe7u4A==, tableContent=null), ArticleFig(id=1308817961067053495, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=EN, label=null, caption=null, figureFileSmall=BCzHYPQrxbGqcOCmcQ7lpw==, figureFileBig=P85/Q1/q8rY13C9cFpg9fw==, tableContent=null), ArticleFig(id=1308817961138356664, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=CN, label=Fig.7, caption=
pH dependency analysis of R4-11. A: Representative urea-PAGE analysis of R4-11 showing RNA cleavage activity under different pH conditions; B: pH dependent catalytic cleavage activity profile of R4-11. n = 3, x ± s, figureFileSmall=BCzHYPQrxbGqcOCmcQ7lpw==, figureFileBig=P85/Q1/q8rY13C9cFpg9fw==, tableContent=null), ArticleFig(id=1308817961218048441, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| Family | Number | Sequences (5'-3') |
| 1 | R4-1 | GTGATGATCTAAGTCCAGAGGGAGCATGGTTAGA |
| R4-5 | GTGATGATCTAAGGCCAGACGGAGCATGGTTAGA |
| R4-7 | GTGATGATCTAAGGACAGACGGAGCATGGTTAGA |
| R4-14 | GTGATGATCTAAGTCCAGAGGGAGCATGGTTAGA |
| 2 | R4-2 | GTCATAAGTCGACAGTCCAGTCGTTGGGGTGTGC |
| R4-13 | GTCATAAATCGACAGTCCAGTCGTTGGGGTGTGC |
| 3 | R4-3 | ATCATGAGCATATCGTCCGTGGATCTTGGTTAAG |
| R4-4 | TTCATGAGCATATCGTCCGTGGATCTTGGTTAAC |
| R4-8 | GTCATGAGCATATCGTCCGTGGATCTTGGTTAAG |
| R4-9 | TTCATGAGCATATCGTCCGTGGATCTTGGTTAAG |
| R4-10 | GTGATGAGCATATCGTCCGTGGATCTTGGTTAAG |
| R4-12 | CTCATGAGCATATCGTCCGTGGATCTTGGTTAAG |
| R4-15 | ATCATGAGCATATCGTCCGTGGATCTTGGTTAAC |
| R4-16 | TTCATGAGCATACCGTCCGTGGATCTTGGTTAAC |
| R4-19 | TTCATGAGCATATCGTCCATGGATCTTGGTTAAC |
| R4-20 | ATCACGAGCATATCGTCCGTGGATCTTGGTTAAG |
| 4 | R4-6 | GTGATGAAAGGCGTTAAGACGTAGGACGGGTATA |
| R4-11 | ATCATGAAGTGGGATTGCGAGATAGGAGGTTGGA |
| R4-17 | GTGATGAAAGGCGTTAAGATGTAGGACGGGTAGA |
| R4-18 | GTGATGAAAGGCGTTAAGATGTAGGACGGGTATA |
), ArticleFig(id=1308817961289351610, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308817752312349616, language=CN, label=Tab.1, caption=
Next-generation sequencing of four ribozyme families. Note: The underlined sequences are RNA binding arm sequences
, figureFileSmall=null, figureFileBig=null, tableContent=
| Family | Number | Sequences (5'-3') |
| 1 | R4-1 | GTGATGATCTAAGTCCAGAGGGAGCATGGTTAGA |
| R4-5 | GTGATGATCTAAGGCCAGACGGAGCATGGTTAGA |
| R4-7 | GTGATGATCTAAGGACAGACGGAGCATGGTTAGA |
| R4-14 | GTGATGATCTAAGTCCAGAGGGAGCATGGTTAGA |
| 2 | R4-2 | GTCATAAGTCGACAGTCCAGTCGTTGGGGTGTGC |
| R4-13 | GTCATAAATCGACAGTCCAGTCGTTGGGGTGTGC |
| 3 | R4-3 | ATCATGAGCATATCGTCCGTGGATCTTGGTTAAG |
| R4-4 | TTCATGAGCATATCGTCCGTGGATCTTGGTTAAC |
| R4-8 | GTCATGAGCATATCGTCCGTGGATCTTGGTTAAG |
| R4-9 | TTCATGAGCATATCGTCCGTGGATCTTGGTTAAG |
| R4-10 | GTGATGAGCATATCGTCCGTGGATCTTGGTTAAG |
| R4-12 | CTCATGAGCATATCGTCCGTGGATCTTGGTTAAG |
| R4-15 | ATCATGAGCATATCGTCCGTGGATCTTGGTTAAC |
| R4-16 | TTCATGAGCATACCGTCCGTGGATCTTGGTTAAC |
| R4-19 | TTCATGAGCATATCGTCCATGGATCTTGGTTAAC |
| R4-20 | ATCACGAGCATATCGTCCGTGGATCTTGGTTAAG |
| 4 | R4-6 | GTGATGAAAGGCGTTAAGACGTAGGACGGGTATA |
| R4-11 | ATCATGAAGTGGGATTGCGAGATAGGAGGTTGGA |
| R4-17 | GTGATGAAAGGCGTTAAGATGTAGGACGGGTAGA |
| R4-18 | GTGATGAAAGGCGTTAAGATGTAGGACGGGTATA |
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