Article(id=1190375274500952551, tenantId=1146029695717560320, journalId=1190317699101192196, issueId=1190375270847710190, articleNumber=1001-2494(2025)03-0244-06, orderNo=null, doi=10.11669/cpj.2025.03.006, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1715011200000, receivedDateStr=2024-05-07, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1761737181544, onlineDateStr=2025-10-29, pubDate=1738944000000, pubDateStr=2025-02-08, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1761737181544, onlineIssueDateStr=2025-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1761737181544, creator=13701087609, updateTime=1761737181544, updator=13701087609, issue=Issue{id=1190375270847710190, tenantId=1146029695717560320, journalId=1190317699101192196, year='2025', volume='60', issue='3', pageStart='209', pageEnd='312', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1761737180673, creator=13701087609, updateTime=1761793989024, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1190613542412890252, tenantId=1146029695717560320, journalId=1190317699101192196, issueId=1190375270847710190, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1190613542412890253, tenantId=1146029695717560320, journalId=1190317699101192196, issueId=1190375270847710190, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=244, endPage=249, ext={EN=ArticleExt(id=1190375274756805096, articleId=1190375274500952551, tenantId=1146029695717560320, journalId=1190317699101192196, language=EN, title=Identification and Analysis of Bacillus Species Contaminating Traditional Chinese Medicine Based on gyrB Gene, columnId=null, journalTitle=Chinese Pharmaceutical Journal, columnName=null, runingTitle=null, highlight=null, articleAbstract=

OBJECTIVE To indentify and analyze Bacillus species and their characteristics contaminating traditional Chinese medicine. METHODS Screening for a reaction system more suitable for gyrB gene amplification conditions and sequencing Bacillus species in contaminated traditional Chinese medicine preparations, medicinal herbal, herbal pieces and extracts. Analyzing the types and homogeneity of contaminating bacteria through comparing gene sequences and constructing a phylogenetic tree. RESULTS The results indicate that the prevalence of Bacillus subtilis as the most common contaminating bacterium across various sample types, followed by Bacillus velezensis, Bacillus megaterium, Bacillus licheniformis and Bacillus amyloliquefaciens. Additionally, pathogenic bacterium Bacillus cereus was also detected in this analysis. The gyrB gene demonstrates good discriminatory power for various Bacillus species and subspecies, effectively distinguishing same contaminating strains relationships among diverse production enterprises, showing relevance of sources. CONCLUSION To ensure the quality and safety of traditional Chinese medicine products, production enterprises must enhance control measures at the source during the production process and select appropriate sterilization processes tailored to the characteristics of traditional Chinese medicine varieties.

, correspAuthors=Manman LU, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, 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=Yongqi GAN, Cheng LIU, Bin ZHU, Lanyan FAN, Jun NONG, Jie HUANG, Wenchao LING, Manman LU), CN=ArticleExt(id=1190375463844418180, articleId=1190375274500952551, tenantId=1146029695717560320, journalId=1190317699101192196, language=CN, title=基于gyrB基因鉴定分析污染中药的芽孢杆菌, columnId=1190352405612040510, journalTitle=中国药学杂志, columnName=论著, runingTitle=null, highlight=null, articleAbstract=

目的 鉴定分析污染中药的芽孢杆菌种类。方法 筛选更适用于gyrB基因扩增条件的反应体系,并对污染中药制剂、中药材、饮片和中药提取物的芽孢杆菌进行测序,通过对比基因序列和构建系统发育树分析污染菌的种类和同源性。结果 枯草芽孢杆菌是各类样品中最常见的污染菌,其次为贝莱斯芽孢杆菌、巨大芽孢杆菌、地衣芽孢杆菌和解淀粉芽孢杆菌等,并检出条件致病菌蜡样芽孢杆菌;gyrB基因对芽孢杆菌各种、亚种具有较好的分辨力,能够有效区分同一种污染菌在不同生产企业间的菌株亲缘关系,并呈现来源的相关性。结论 为保证中药产品的质量和安全性,生产企业需加强从生产过程的源头控制原辅料带来的污染,根据中药品种的特性选择适宜的灭菌工艺。

, correspAuthors=卢曼曼, authorNote=null, correspAuthorsNote=
*卢曼曼,女,硕士,助理研究员 研究方向:生化与分子生物学 Tel:(0771)3899005
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甘永琦,男,硕士,副主任药师 研究方向:生物检验及研究

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甘永琦,男,硕士,副主任药师 研究方向:生物检验及研究

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甘永琦,男,硕士,副主任药师 研究方向:生物检验及研究

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Int J Syst Evol Microbiol, 2020, 70:5753-5798., articleTitle=Robust demarcation of 17 distinct Bacillus species clades, proposed as novel Bacillaceae genera, by phylogenomics and comparative genomic analyses: description of Robertmurraya kyonggiensis sp. nov. and proposal for an emended genus Bacillus limiting it only to the members of the Subtilis and Cereus clades of species, refAbstract=null), Reference(id=1190958864620208598, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1190375274500952551, doi=null, pmid=null, pmcid=null, year=2020, volume=70, issue=1, pageStart=481, pageEnd=486, url=null, language=null, rfNumber=[26], rfOrder=25, authorNames=TUO L, LIU F, YAN X R, journalName=Int J Syst Evol Microbiol, refType=null, unstructuredReference=TUO L, LIU F, YAN X R, et al. Bacillus taxi sp.nov., a novel endophytic bacterium isolated from root of Taxus chinensis (Pilger) Rehd[J]. Int J Syst Evol Microbiol, 2020, 70(1):481-486., articleTitle=a novel endophytic bacterium isolated from root of Taxus chinensis (Pilger) Rehd, refAbstract=null), Reference(id=1190958864670540247, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1190375274500952551, doi=null, pmid=null, pmcid=null, year=2024, volume=59, issue=11, pageStart=1041, pageEnd=1046, url=null, language=null, rfNumber=[27], rfOrder=26, authorNames=YAN Z Y, TAN Y X, LININ J H, journalName=Chin Pharm J (中国药学杂志), refType=null, unstructuredReference=YAN Z Y, TAN Y X, LININ J H, et al. Evaluation of the application value of metagenomic sequencing in identification and tracing of bacteria contaminating drugs[J]. 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DOI: 10.1016/j.tim.2020.09.003, articleTitle=Bacillus cereus: epidemiology, virulence factors, and host-pathogen interactions, refAbstract=null), Reference(id=1190958864808952281, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1190375274500952551, doi=null, pmid=null, pmcid=null, year=1998, volume=null, issue=null, pageStart=133, pageEnd=null, url=null, language=null, rfNumber=[29], rfOrder=28, authorNames=WATSON D H, journalName=Natural Toxicants in Food, refType=null, unstructuredReference=WATSON D H. Natural Toxicants in Food[M]. 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Food Drug(食品与药品), 2022, 24(2): 152-158., articleTitle=Study on effect of 60Co-γ radiation sterilization on effective components of Shaoshangling Tincture based on HPLC fingerprints, refAbstract=null), Reference(id=1190958865056416221, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1190375274500952551, doi=null, pmid=null, pmcid=null, year=2021, volume=23, issue=6, pageStart=1029, pageEnd=1035, url=null, language=null, rfNumber=[33], rfOrder=32, authorNames=DING W, HE J, HUANG D P, journalName=Mod Chin Med (中国现代中药), refType=null, unstructuredReference=DING W, HE J, HUANG D P, et al. Study on effect of 60Co-γ radiation sterilization on active ingredients of Polygoni Cuspidati Rhizoma et Radix based on HPLC fingerprint[J]. 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M-2 000 bp marker; 1-3-TB1, TB2 and negative control using F8 PCR master mix; 4-6-TB1, TB2 and negative control using PrimeSTAR max DNA polymerase; 7-9-TB1, TB2 and negative control using Q5 PCR master mix; 10-12-TB1, TB2 and negative control using platinu Ⅱ PCR master mix; 13-15-Amplification of 16S rRNA genes of TB1, TB2, and negative control using F8 PCR master mix.

, figureFileSmall=FUijvjuPj/XWvqUFqOYflA==, figureFileBig=NJzULRC3TSKoOjeK0qiwoA==, tableContent=null), ArticleFig(id=1190958862221066674, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1190375274500952551, language=CN, label=图1, caption=不同品牌聚合酶链式反应(PCR)预混液扩增gyrB基因的电泳结果

M-2 000 bp marker;1~3-F8预混液的TB1、TB2和阴性对照;4~6-PrimeSTAR预混液的TB1、TB2和阴性对照;7~9-Q5预混液的TB1、TB2和阴性对照;10~12-Platinu Ⅱ预混液的TB1、TB2和阴性对照;13~15-F8预混液扩增TB1、TB2和阴性对照的16S rRNA基因样品。

, figureFileSmall=FUijvjuPj/XWvqUFqOYflA==, figureFileBig=NJzULRC3TSKoOjeK0qiwoA==, tableContent=null), ArticleFig(id=1190958862304952755, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1190375274500952551, language=EN, label=Fig.2, caption=Electrophoretic results of adding Platinum GC Enhancer to amplify gyrB gene

M-2 000 bp marker; 1-3-TB1, TB2 and negative control without GC enhancer; 4-6-TB1, TB2 and negative control containing GC enhancer.

, figureFileSmall=IbTC8Jb2QdkE1UlDD/YXpA==, figureFileBig=AvVIIhMe92V6viVOuFECzA==, tableContent=null), ArticleFig(id=1190958862397227444, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1190375274500952551, language=CN, label=图2, caption=加入Platinum GC enhancer扩增gyrB基因的电泳结果

M-2 000 bp marker;1~3-不含GC增强剂的TB1、TB2和阴性对照;4~6-含GC增强剂的TB1、TB2和阴性对照。

, figureFileSmall=IbTC8Jb2QdkE1UlDD/YXpA==, figureFileBig=AvVIIhMe92V6viVOuFECzA==, tableContent=null), ArticleFig(id=1190958862455947701, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1190375274500952551, language=EN, label=Fig.3, caption=Distribution of Bacillus species contaminating traditional Chinese medicine, figureFileSmall=wNH9//ALVtvphWYInket7g==, figureFileBig=rrNK/Rwjuej5xIbWMGiTbQ==, tableContent=null), ArticleFig(id=1190958862514667958, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1190375274500952551, language=CN, label=图3, caption=污染中药的芽孢杆菌分布, figureFileSmall=wNH9//ALVtvphWYInket7g==, figureFileBig=rrNK/Rwjuej5xIbWMGiTbQ==, tableContent=null), ArticleFig(id=1190958862573388215, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1190375274500952551, language=EN, label=Fig.4, caption=Phylogenetic tree analysis of gyrB gene in different strains

The first letter S in the strain number-Shihu Yeguang Wan, T-Tianwang Buxin Wan, G-Guanmaining Preparation, X-Watermelon frost, and C-Traditional Chinese herbal pieces; The second letter represents the abbreviation of the production enterprise; Numbers represent different strains of bacteria.

, figureFileSmall=exwnqr+R4iLuFH1mN0meIw==, figureFileBig=USNiWlMLVjzBmSC2uHip+w==, tableContent=null), ArticleFig(id=1190958862644691384, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1190375274500952551, language=CN, label=图4, caption=不同菌株的gyrB基因进化树分析

菌株编号中第一个字母S-石斛夜光丸、T-天王补心丸、G-冠脉宁制剂、X-西瓜霜、C-中药饮片;第二个字母代表生产企业简称;数字代表不同菌株。

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基于gyrB基因鉴定分析污染中药的芽孢杆菌
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甘永琦 1 , 刘成 2 , 朱斌 1 , 樊兰艳 1 , 农浚 1 , 黄结 1 , 零文超 1 , 卢曼曼 3, *
中国药学杂志 | 论著 2025,60(3): 244-249
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中国药学杂志 | 论著 2025, 60(3): 244-249
基于gyrB基因鉴定分析污染中药的芽孢杆菌
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甘永琦1, 刘成2, 朱斌1, 樊兰艳1, 农浚1, 黄结1, 零文超1, 卢曼曼3, *
作者信息
  • 1 广西壮族自治区药品检验研究院, 南宁 530021
  • 2 广西医科大学药学院, 南宁 530021
  • 3 广西壮族自治区农业科学院甘蔗研究所, 南宁 530004
  • 甘永琦,男,硕士,副主任药师 研究方向:生物检验及研究

通讯作者:

*卢曼曼,女,硕士,助理研究员 研究方向:生化与分子生物学 Tel:(0771)3899005
Identification and Analysis of Bacillus Species Contaminating Traditional Chinese Medicine Based on gyrB Gene
Yongqi GAN1, Cheng LIU2, Bin ZHU1, Lanyan FAN1, Jun NONG1, Jie HUANG1, Wenchao LING1, Manman LU3, *
Affiliations
  • 1 Guangxi Institute for Drug Control,Nanning 530021, China
  • 2 School of Pharmaceutical, Guangxi Medical University, Nanning 530021, China
  • 3 Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530004, China
出版时间: 2025-02-08 doi: 10.11669/cpj.2025.03.006
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目的 鉴定分析污染中药的芽孢杆菌种类。方法 筛选更适用于gyrB基因扩增条件的反应体系,并对污染中药制剂、中药材、饮片和中药提取物的芽孢杆菌进行测序,通过对比基因序列和构建系统发育树分析污染菌的种类和同源性。结果 枯草芽孢杆菌是各类样品中最常见的污染菌,其次为贝莱斯芽孢杆菌、巨大芽孢杆菌、地衣芽孢杆菌和解淀粉芽孢杆菌等,并检出条件致病菌蜡样芽孢杆菌;gyrB基因对芽孢杆菌各种、亚种具有较好的分辨力,能够有效区分同一种污染菌在不同生产企业间的菌株亲缘关系,并呈现来源的相关性。结论 为保证中药产品的质量和安全性,生产企业需加强从生产过程的源头控制原辅料带来的污染,根据中药品种的特性选择适宜的灭菌工艺。

芽孢杆菌  /  gyrB基因  /  中药  /  微生物鉴定

OBJECTIVE To indentify and analyze Bacillus species and their characteristics contaminating traditional Chinese medicine. METHODS Screening for a reaction system more suitable for gyrB gene amplification conditions and sequencing Bacillus species in contaminated traditional Chinese medicine preparations, medicinal herbal, herbal pieces and extracts. Analyzing the types and homogeneity of contaminating bacteria through comparing gene sequences and constructing a phylogenetic tree. RESULTS The results indicate that the prevalence of Bacillus subtilis as the most common contaminating bacterium across various sample types, followed by Bacillus velezensis, Bacillus megaterium, Bacillus licheniformis and Bacillus amyloliquefaciens. Additionally, pathogenic bacterium Bacillus cereus was also detected in this analysis. The gyrB gene demonstrates good discriminatory power for various Bacillus species and subspecies, effectively distinguishing same contaminating strains relationships among diverse production enterprises, showing relevance of sources. CONCLUSION To ensure the quality and safety of traditional Chinese medicine products, production enterprises must enhance control measures at the source during the production process and select appropriate sterilization processes tailored to the characteristics of traditional Chinese medicine varieties.

Bacillus  /  gyrB gene  /  traditional Chinese medicine  /  microbial identification
甘永琦, 刘成, 朱斌, 樊兰艳, 农浚, 黄结, 零文超, 卢曼曼. 基于gyrB基因鉴定分析污染中药的芽孢杆菌. 中国药学杂志, 2025 , 60 (3) : 244 -249 . DOI: 10.11669/cpj.2025.03.006
Yongqi GAN, Cheng LIU, Bin ZHU, Lanyan FAN, Jun NONG, Jie HUANG, Wenchao LING, Manman LU. Identification and Analysis of Bacillus Species Contaminating Traditional Chinese Medicine Based on gyrB Gene[J]. Chinese Pharmaceutical Journal, 2025 , 60 (3) : 244 -249 . DOI: 10.11669/cpj.2025.03.006
中药制剂的原料以中药饮片、提取物和有效成分或部位等为主。中药材多源于天然植物、动物和矿物等,因其自身营养、基质等容易受到微生物污染,而不同来源的中药材其微生物污染源不同。如根茎类药材带有土壤的微生物较多;叶、花、果实类药材常有空气中的各类微生物。中药材及饮片在其种植、采收、加工等过程会引入微生物污染,虽然通过净选、洗润、干燥、炮制等过程,可降低所携带的微生物负载量,但在适宜的温度和湿度下,若存放不当则会引起微生物再次生长繁殖[1]。研究表明,污染中药饮片的耐热菌[2-3]和中药制剂的微生物[4-5]均以芽孢杆菌为主。
芽孢杆菌属(Bacillus)多数为革兰阳性杆菌,广泛存在于自然界,是土壤和植物微生物的优势种群之一[6],可产生内生孢子,能够抵抗生存环境中由于干燥、加热和辐射所造成的伤害,维持自身能力不受影响,导致它们对环境[7]、药品[8]和食品[9]等造成污染。大部分芽孢杆菌根据《伯杰氏系统细菌学手册》测定菌种的基本特征和16S rRNA基因序列进行鉴定。传统的生化试验法进行微生物鉴定耗时费力,结果易受菌株活性影响,并且对于亲缘关系密切的种群很难区分[10]。而芽孢杆菌种间的16S rRNA序列因同源性太高,通常不能准确分辨群内的各个种[11]。研究表明,芽孢杆菌各种、亚种的gyrB基因比16S rRNA有更好的区分效果[12-13],可作为该种群鉴定的靶基因。本实验筛选了更适用于gyrB基因扩增条件的反应体系,并对污染中药制剂、中药饮片和中药提取物的芽孢杆菌进行测序,通过对比基因序列和构建系统发育树分析污染菌的种类和同源性,为药品微生物污染的风险评估和标准制定提供数据支持。
中药制剂分别来自天王补心丸33家生产企业的193批样品,冠脉宁制剂(片、胶囊)9家生产企业的119批样品,石斛夜光丸18家生产企业的146批样品,桂林西瓜霜1家生产企业的15批样品;中药饮片分别来自1家生产企业的黄芩饮片、黄连饮片和西瓜霜,共15批样品;中药提取物分别来自2家生产企业的大黄提取物和生发片中药提取物,共3批样品。
胰酪大豆胨琼脂培养基(TSA,德国默克密理博公司)、胰酪大豆胨液体培养基(TSB,德国默克密理博公司)、细菌基因组DNA提取试剂盒[货号DP302,天根生化科技(北京)有限公司]、2×F8 FastLong PCR Master Mix(F8,货号PC80-2,北京艾德莱生物科技有限公司)、PrimeSTAR Max DNA Polymerase [PrimeSTAR,货号R045B,TaKaRa宝生物工程(大连)有限公司]、Q5热启动超保真2×预混液[Q5,货号M0494L,NEB(北京)有限公司]、Platinu Ⅱ Hot-Start Green PCR Master Mix(2×)(Platinu Ⅱ,货号14001013,美国Thermo Fisher公司)。
琼脂糖凝胶电泳仪及成像系统(美国Bio-Rad公司)、 聚合酶链式反应(PCR)仪(德国Eppendorf公司)、基质辅助激光解吸电离飞行时间质谱(MALDI-TOF-MS)microfles LT型(美国布鲁克公司)、BD400生化培养箱(德国BINDER公司)、AC2-6S1生物安全柜(新加坡ESCO公司)。
从需氧菌总数检查项中,分离纯化胰酪胨大豆琼脂平板上生长的微生物,采用 MALDI-TOF-MS[14]或染色镜检的方法,对芽孢杆菌进行初步鉴定。将筛查到的芽孢杆菌转接至胰酪大豆胨液体培养基(TSB)中,于33 ℃培养48~72 h增菌。按细菌基因组DNA提取试剂盒说明书操作提取TSB增菌液的DNA,保存至-20 ℃备用。
分别使用通用引物扩增16S rRNA基因[15](引物序列27F:5'-AGAGTTTGATCCTGGCTCAG-3',1492R:5'-GGTTACCTTGTTACGACTT-3')和gyrB基因[16](引物序列gyrB-F:5'-GAAGTCATCATGACCGTTCTGCAYGCNGGNGGNAARTTYGA-3',gyrB-R:5'-AGCAGGGTACGGATGTGCGAGCCRTCNACR TCNGCRTCNGTCAT-3'),并使用测序引物(引物序列Seq-gyrB-F:5'-GAAGTCATCATGACCGTTCTGCA-3',Seq-gyrB-R:5'-AGCAGGGTACGGATGTGCGAGCC-3')对gyrB基因进行测序,委托北京乐八科技有限公司完成。从Genbank下载部分菌株序列,包括枯草芽孢杆菌(Bacillus subtilis)MT119760.1、贝莱斯芽孢杆菌(Bacillus velezensis)CP017775.1、沙福芽孢杆菌(Bacillus safensis)AY167878.1、耐受盐芽孢杆菌(Bacillus halotolerans)MW879358.1、地衣芽孢杆菌(Bacillus licheniformis)MW462193.1、短小芽孢杆菌(Bacillus pumilus)MF784848.1、解淀粉芽孢杆菌(Bacillus amyloliquefaciens)MW418529.1、副地衣芽孢杆菌(Bacillus paralicheniformis)MT949532.1、红豆杉尼尔菌(Niallia taxi)CP102589.1、莫哈韦芽孢杆菌(Bacillus mojavensis)DQ309297.1、高地芽孢杆菌(Bacillus altitudinis)KJ809604.1、深褐芽孢杆菌(Bacillus atrophaeus)GU994861.1、蜡样芽孢杆菌(Bacillus cereus)KX346713.1、巨大芽孢杆菌(Bacillus megaterium)EU711066.1和解淀粉类芽孢杆菌(Paenibacillus amylolyticus)CP107037.1。采用MAGE 6.0软件进行基因序列的比对与系统进化分析,以邻位相连法(neighbor-joining) 绘制系统发育树。
考察4个不同品牌的PCR预混液扩增2株芽孢杆菌(TB1和TB2)gyrB基因的效率,同时用F8预混液扩增样本TB1和TB2的16S rRNA基因作为阳性对照,以纯化水为样本进行PCR扩增作为阴性对照。PCR产物的琼脂糖凝胶电泳结果显示,采用Platinu Ⅱ预混液对2个菌株的gyrB基因进行PCR扩增,得到微弱条带;而其他品牌的预混液,除了Q5预混液在扩增样本TB1有微弱条带外,基本没有清晰可见条带;用F8预混液扩增菌株TB1和TB2的16S rRNA基因,得到清晰明亮的条带(图1)。在Platinu Ⅱ预混液的25 μL反应体系中加入1.25 μL的Platinum GC Enhancer,PCR产物条带的亮度明显提升(图2)。实验表明,由于gyrB基因的扩增引物带有较多的兼并碱基序列,导致部分样本的PCR扩增难度增加,使用含Platinum GC Enhancer的Platinu Ⅱ预混液可提高扩增的特异性和产量,更适用于gyrB基因的扩增条件。
本次通过对目标菌的gyrB基因进行测序,在NCBI上比对分析不同菌株基因序列,从中药制剂、中药饮片和中药提取物中共检出273株芽孢杆菌,分别归属于15个种。其中枯草芽孢杆菌(B. subtilis,占比36.3%)的检出率最高,是各类样品中常见的污染菌;其次为贝莱斯芽孢杆菌(B. velezensis,占比8.8%)和巨大芽孢杆菌(B. megaterium,占比8.4%);还有地衣芽孢杆菌(B. licheniformis,占比7.0%)、耐受盐芽孢杆菌(B. halotolerans,占比6.6%)、莫哈韦芽孢杆菌(B. mojavensis,占比6.6%)、短小芽孢杆菌(B. pumilus,占比6.2%)和解淀粉芽孢杆菌(B. amyloliquefaciens,占比5.1%)等;此外,蜡样芽孢杆菌(B. cereus)在3种中药制剂中被检出(图3)。
gyrB基因的测序引物进行双向核酸序列测定,获得的基因序列进行校核和拼接,通过测序引物定位和截齐基因序列。把序列导入MAGE 6.0分析软件,构建系统进化树。聚类分析结果显示,检出的15种芽孢杆菌均各自聚类为1个分支,说明其核酸序列中存在特异性单核苷酸多态性(SNP)位点,在种的水平具有较高的分辨力;聚类分析不同样本中分离得到的芽孢杆菌基因序列,gyrB基因能够有效区分同一种污染菌在不同生产企业间的菌株亲缘关系,并呈现来源的相关性,提示其核酸序列在亚种水平具有一定的分辨力(图4)。
微生物控制是药品质量体系中不可或缺的组成部分。芽孢杆菌是污染中药的主要微生物之一[2-5]。16S rRNAgyrBgyrArpoB等基因涵盖芽孢杆菌的各个种,为菌株的鉴别提供了多样化选择[11,17]。其中,gyrB基因对芽孢杆菌各种、亚种具有较好的分辨力,可用于鉴定芽孢杆菌不同种。本实验通过筛选适宜的反应体系或利用多基因序列进行综合分析进而避免由于gyrB基因的扩增引物带有兼并碱基序列而造成的非特异扩增,因此,可真实反映本实验样品中芽孢杆菌群各个分类单元的差异[18-19]
本实验芽孢杆菌鉴定结果表明,枯草芽孢杆菌是各类样品中最常见的污染菌,其次为贝莱斯芽孢杆菌、巨大芽孢杆菌、地衣芽孢杆菌和解淀粉芽孢杆菌等,它们广泛分布在土壤或腐败的有机物中,对粮食安全、人体及动植物无危害,可应用于动物饲料、净化水质、医药和植物病害的生物防治[20-24];红豆杉尼尔菌最初分离于红豆杉的根部[25-26],在此次分析中,桂林西瓜霜的多个批次均检出该菌且亲缘关系较近,提示它可能为这类产品的特征污染菌;此外,蜡样芽孢杆菌在3种中药制剂中均有检出,是环境和食品常见污染菌[27],该类菌可引起呕吐、腹泻和肠绞痛等为主要症状的食物中毒[28],其产生的致吐毒素甚至可耐受高温加热[29]。可通过检测与致病性相关的毒素基因,如非溶血性肠毒素的nhe基因、溶血素BL的hbl基因和呕吐型毒素的ces基因等[30],进一步关注该类菌对中药污染的潜在风险。
在药品微生物过程控制中,企业需从源头控制原辅料带来的污染,如严格执行净制工艺、控制产品水分活度等,降低微生物的污染水平;可通过比较净制、烘干等炮制工艺前后的微生物负载情况,建立合理的生产工序。除此之外,包装材料、设备或者环境等带入的污染也不容忽视,每次带入的包装材料应对其进行表面消毒、生产环境也应定期进行消毒,并定期更换消毒剂,关注芽孢菌的消杀。虽然近10年来,辐照灭菌因其效率高、效果好、低成本等优势成为中药灭菌领域的主要手段[31],但该灭菌工艺的广泛使用可能是造成中药制剂总体微生物负载水平低,芽孢杆菌为主要污染菌[5]的重要因素。建议结合辐照灭菌对药材的化学性质改变情况、产品本身芽孢杆菌污染机会以及对芽孢杆菌的清除情况等因素[32-33]综合选择适宜的灭菌工艺,严格控制中药产品的微生物污染水平。
  • 广西食品药品监督管理局科研计划项目资助(桂药监科2020-04)
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2025年第60卷第3期
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doi: 10.11669/cpj.2025.03.006
  • 接收时间:2024-05-07
  • 首发时间:2025-10-29
  • 出版时间:2025-02-08
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  • 收稿日期:2024-05-07
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广西食品药品监督管理局科研计划项目资助(桂药监科2020-04)
作者信息
    1 广西壮族自治区药品检验研究院, 南宁 530021
    2 广西医科大学药学院, 南宁 530021
    3 广西壮族自治区农业科学院甘蔗研究所, 南宁 530004

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*卢曼曼,女,硕士,助理研究员 研究方向:生化与分子生物学 Tel:(0771)3899005
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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