基于ITS2条形码鉴别南大青叶的PCR-RFLP研究  

Identification of leaves from Baphicacanthus cusia based on ITS2 DNA barcode and PCR-RFLP

作　　者：黄韵璇 朱晓燕[1] 侯惠婵[1] 陈伟盛[1] HUANG Yun-xuan;ZHU Xiao-yan;HOU Hui-chan;CHEN Wei-sheng(Guangzhou Institute for Drug Control,NMPA Key Laboratory of Quality Control of Chinese Patent Medicine,Guangzhou,510000,China)

机构地区：[1]广州市药品检验所国家药品监督管理局中成药质量评价重点实验室,广东广州510000

出　　处：《中草药》2021年第20期6350-6356,共7页Chinese Traditional and Herbal Drugs

基　　金：广州市科技计划项目(20212210005);广州市市场监督管理局科技项目。

摘　　要：目的建立南大青叶马蓝Baphicacanthus cusia的分子鉴别方法。方法分析36批马蓝及其混伪品的ITS2和psbAtrnH基因序列信息,根据关键差异位点建立相应的聚合酶链式反应法-限制性片段长度多态性分析(polymerase chain reactionrestriction fragment length polymorphism,PCR-RFLP)鉴别方法,并考察该方法的专属性和耐用性。结果马蓝的psbA-trnH基因序列与其混伪品的无明显位点差异,ITS2基因序列具有明显的种间差异,其中1个关键差异位点可被限制性内切酶Sma I识别和酶切,以此建立的PCR-RFLP鉴别方法符合《中国药典》2020年版四部中专属性和耐用性的要求。结论建立了有效鉴别南大青叶的PCR-RFLP方法,且该方法适用于基原物种为马蓝的其他中药材鉴别。Objective To establish a molecular identification method for leaves of Baphicacanthus cusia. Method The polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP) identification method was established on sequencing the ITS2 and psbA-trnH with DNA bacording technique from ChP. 2020 Volume Ⅳ, analyzing the variation site of 36 batches leaves of B. cusia and its adulterants, and verifying the specificity and durability. Result There was significant interspecific difference in ITS2 and no available variation site in psbA-trnH of B. cusia and its adulterants. The PCR-RFLP method with recognizing the critical site in ITS2 and digesting the amplicifition product of B. cusia by restriction enzyme Sma I was established and verified. Conclusion The PCRRFLP method based on ITS2 DNA barcode can effectively identify B. cusia and its adulterants.

关 键 词：马蓝 大青 DNA条形码 PCR-RFLP ITS2 

分 类 号：R282.12[医药卫生—中药学]