Article(id=1322190370901966932, tenantId=1146029695717560320, journalId=1319373162502258839, issueId=1322190358751069178, articleNumber=null, orderNo=null, doi=10.16016/j.2097-0927.202505056, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1747929600000, receivedDateStr=2025-05-23, revisedDate=1750608000000, revisedDateStr=2025-06-23, acceptedDate=null, acceptedDateStr=null, onlineDate=1793164349531, onlineDateStr=2026-10-28, pubDate=1757865600000, pubDateStr=2025-09-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793164349531, onlineIssueDateStr=2026-10-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793164349531, creator=13701087609, updateTime=1793164349531, updator=13701087609, issue=Issue{id=1322190358751069178, tenantId=1146029695717560320, journalId=1319373162502258839, year='2025', volume='47', issue='17', pageStart='1981', pageEnd='2144', issueExtLink='null', onlineDate='null', pubDate='1757865600000', pubDateStr='2025-09-15', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1793164346635, creator='13701087609', updateTime=1793164560388, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322191255602319722, tenantId=1146029695717560320, journalId=1319373162502258839, issueId=1322190358751069178, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322191255602319723, tenantId=1146029695717560320, journalId=1319373162502258839, issueId=1322190358751069178, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=2088, endPage=2096, ext={EN=ArticleExt(id=1322190371090710613, articleId=1322190370901966932, tenantId=1146029695717560320, journalId=1319373162502258839, language=EN, title=Effects of meropenem and amikacin on gut microbiota diversity and structure in a neonatal rat model of necrotizing enterocolitis, columnId=1320434418116837551, journalTitle=Journal of Army Medical University, columnName=Basic Medicine, runingTitle=null, highlight=null, articleAbstract=
Objective To investigate the effects of meropenem and amikacin on gut microbiota diversity and composition in a neonatal rat model of necrotizing enterocolitis (NEC).
Methods Neonatal SD rats (1~2 d, weighing 5~10 g, both sexes) were subjected to establish a NEC model through artificial formula feeding, hypoxic-cold stress, and lipopolysaccharide (LPS) gavage. The rats were randomly divided into normal control group (Group C, n=12), NEC group (Group N, n=20), meropenem intervention group (Group M, n=20), and amikacin intervention group (Group A, n=20). Following modeling, Group M and Group A received intraperitoneal injections of meropenem (125 mg/kg) or amikacin (468 mg/kg), twice daily for 3 consecutive days. Groups C and N were administered an equal volume of normal saline. At the end of the intervention, colonic contents or fecal samples were collected. The gut microbiota structure was analyzed using 16S rDNA high-throughput sequencing. Bioinformatics analysis was performed using the QIIME2 platform. Alpha diversity was evaluated using Chao1, Shannon, and Simpson indices. Beta diversity was assessed based on Bray-Curtis distance through principal coordinate analysis (PCoA) and non-metric multidimensional scaling (NMDS). Venn and UpSet plots were generated to visualize the composition and overlap of operational taxonomic units (OTUs). Linear discriminant analysis effect size (LEfSe) was applied to identify differentially abundant taxa across groups.
Results High-throughput 16S rDNA sequencing showed that the N group had significantly lower 3 indices of α diversity than the C group (P<0.01), that is, a Chao1 index from 230 to 40, a Shannon index from 1.65 to 0.85, and a Simpson index from 0.65 to 0.42. After antibiotic intervention, both the M group and A group obtained obvious increases in the Chao1 index than the N group (P<0.001), with a greater increase observed in the M group than in the A group (P<0.05). However, neither antibiotic group exhibited notable improvements in the Shannon index or Simpson index compared with the N group (P>0.05). Venn and UpSet analyses revealed that the M group had the highest number of unique OTUs (283), while the A group shared the most OTUs (63) with the C group. PCoA and NMDS analyses indicated that the microbial structure of the A group was closer to that of the C group, with better clustering. Taxonomic composition and LEfSe analysis demonstrated that the N group was enriched with potentially pathogenic taxa such as Escherichia coli B2 and Klebsiella under the phylum Proteobacteria, while beneficial bacteria including Lactobacillaceae and Bifidobacteriaceae (phylum Firmicutes) were significantly reduced, indicating severe dysbiosis. In contrast, the A group exhibited a significant increase in beneficial bacteria and a structural tendency toward ecological recovery. The M group, however, was enriched with various conditionally pathogenic and environmentally associated genera, displaying a microbial configuration notably deviating from a healthy state.
Conclusion Meropenem and amikacin exhibit differential regulatory effects on the intestinal microbiota in the context of NEC. Amikacin demonstrates superior efficacy in restoring microbial stability and levels of beneficial bacteria, whereas meropenem, although effective for early infection control, warrants caution due to its potential long-term impact on the gut microbiome.
, authors=Chenghuan ZHANG, Haiyan CHENG, Leilei SHEN, Xianyuan YIN, Min TAO, Hedan XU, Sheng CHEN, authorsList=Chenghuan ZHANG, Haiyan CHENG, Leilei SHEN, Xianyuan YIN, Min TAO, Hedan XU, Sheng CHEN, authorCompany=null, correspAuthors=Sheng CHEN, authorNote=null, correspAuthorsNote=null, copyrightStatement=© 2025 Journal of Army Medical University, copyrightOwner=Editorial Office of Journal of Army Medical University, 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=1322190372546134114, articleId=1322190370901966932, tenantId=1146029695717560320, journalId=1319373162502258839, language=CN, title=美罗培南与阿米卡星对新生鼠NEC模型肠道菌群多样性与结构的影响, columnId=1322185528879993170, journalTitle=陆军军医大学学报, columnName=基础医学, runingTitle=null, highlight=null, articleAbstract=
目的 探究美罗培南与阿米卡星对新生鼠坏死性小肠结肠炎(necrotizing enterocolitis,NEC)模型肠道菌群多样性与结构的影响。
方法 采用新生(出生后1~2 d)SD大鼠(体质量5~10 g,雌雄不限)构建NEC模型。按随机数字表法将大鼠分为4组:对照组(C组,n=12)、NEC组(N组,n=20)、美罗培南干预组(M组,n=20)及阿米卡星干预组(A组,n=20)。NEC模型通过人工配方奶喂养、缺氧冷刺激及脂多糖灌胃联合诱导。M组与A组分别于造模后腹腔注射美罗培南(125 mg/kg)或阿米卡星(468 mg/kg),每日2次,连续3 d;C组与N组给予等体积生理盐水。于干预结束后采集粪便样本,采用16S rDNA高通量测序技术分析肠道菌群结构。使用QIIME2平台进行生物信息学分析,采用Chao1、Shannon及Simpson指数评估菌群α多样性,采用Bray-Curtis距离进行主坐标分析(principal coordinates analysis,PCoA)与非度量多维尺度分析(Non-metric multidimensional scaling analysis,NMDS)以评估β多样性,通过Venn图与UpSet图展示操作分类单元(operational taxonomic unit,OTU)组成与重叠情况。采用线性判别分析效应大小法(linear discriminant analysis effect size,LEfSe)分析识别组间差异显著的特征菌群。
结果 采用16S rDNA高通量测序技术评估肠道菌群α多样性,与C组比较,N组的3个多样性指标均显著下降(P<0.01):Chao1指数从230降至40,Shannon指数从1.65降至0.85,Simpson指数从0.65降至0.42。经两种抗生素干预后,M组与A组的Chao1指数较N组均显著回升(P<0.001),且M组升幅大于A组(P<0.05)。然而,2组的Shannon与Simpson指数相较于N组改善不显著。Venn与UpSet分析显示,M组OTU特异性最高(283个),而A组与C组共享OTU最多(63个)。PCoA与NMDS分析中,A组结构趋近C组,聚集性更好。分类组成、关键菌群及LEfSe分析显示,N组富集Proteobacteria门(如 Escherichia coli B2、Klebsiella)等致病菌属,Firmicutes门及益生菌属(如 Lactobacillaceae、Bifidobacteriaceae)显著减少,肠道菌群显著失衡;A组益生菌水平显著上升,微生态结构趋于恢复;M组富集多种条件致病菌及环境相关菌属,菌群构型与健康状态存在明显偏离。
结论 美罗培南与阿米卡星在NEC背景下对肠道菌群调节作用存在差异,阿米卡星在恢复菌群稳定性和益生菌水平方面效果更佳,美罗培南虽适用于早期感染控制但对微生态长期影响需警惕。
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63(Suppl 2):8-15., articleTitle=Initial intestinal colonization in the human infant and immune homeostasis, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1322190372760043619, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322190370901966932, xref=1, ext=[AuthorCompanyExt(id=1322190372768432228, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322190370901966932, companyId=1322190372760043619, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1陆军军医大学(第三军医大学)第一附属医院儿科,重庆)])], figs=[ArticleFig(id=1322190375494729875, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322190370901966932, language=EN, label=Figure 1, caption=
Comparison of alpha diversity of gut microbiota among different groups, figureFileSmall=c0T8bkQNXZA2OLc/J6ANqw==, figureFileBig=zxnqQBl6fB0Q9Mu6NlQRuw==, tableContent=null), ArticleFig(id=1322190375561838740, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322190370901966932, language=CN, label=图1, caption=
各组肠道菌群α多样性比较a:P<0.05,b:P<0.01,c:P<0.001 A:Box plot of the Chao1 index based on 16S rDNA sequencing data evaluating gut microbiota richness among groups; B:Box plot of the Shannon index based on 16S rDNA sequencing data evaluating gut microbiota evenness among groups; C:Box plot of the Simpson index based on 16S rDNA sequencing data evaluating gut microbiota diversity among groups
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Analysis of shared and unique OTUs among groups, figureFileSmall=c13Un0P8GdWr8RiJWgbnSA==, figureFileBig=95LI5fZ+VSlc7EYl7icEGg==, tableContent=null), ArticleFig(id=1322190375826079894, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322190370901966932, language=CN, label=图2, caption=
各组间OTU共享性与特异性分析A:Venn diagram showing shared and unique OTUs among groups; B:UpSet plot displaying the distribution of OTU intersections across different group combinations
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Beta diversity of gut microbiota among different groups, figureFileSmall=BH4+d6MJht2FC/ECqlPHlg==, figureFileBig=Kcmvx1LJ3NMPb1dq/jUAzw==, tableContent=null), ArticleFig(id=1322190375951909016, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322190370901966932, language=CN, label=图3, caption=
各组肠道菌群β多样性分析A:Scatter plot of PCoA based on Bray-Curtis distance displaying β-diversity of gut microbiota among groups; B:Scatter plot of NMDS based on Bray-Curtis distance displaying β-diversity of gut microbiota among groups
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Analysis of changes in gut microbiota composition among groups, figureFileSmall=X5Yy6E1OAKg5H67sXdnI5Q==, figureFileBig=/zpQ90ajTn3OmLOdgJM0cA==, tableContent=null), ArticleFig(id=1322190376107098266, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322190370901966932, language=CN, label=图4, caption=
各组肠道菌群组成变化分析A:stacked bar chart of mean phylum-level abundance among groups using 16S rDNA sequencing;B:Stacked bar chart of phylum-level abundance per sample using 16S rDNA sequencing;C:Stacked bar chart of mean family-level abundance among groups using 16S rDNA sequencing;D:Stacked bar chart of family-level abundance per sample using 16S rDNA sequencing
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Relative abundance changes of key genera across groups, figureFileSmall=gNU/Po680i/0EaA7KjoIcA==, figureFileBig=PPjcS4yj76i5hmZVWRlVRg==, tableContent=null), ArticleFig(id=1322190376283259036, tenantId=1146029695717560320, journalId=1319373162502258839, articleId=1322190370901966932, language=CN, label=图5, caption=
各组关键菌属相对丰度变化a:P<0.01; b:P<0.001 A:Relative abundance of Enterobacteriaceae; B:Relative abundance of Lactobacillus; C:Relative abundance of Escherichia; D:Relative abundance of Clostridium
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各组特征菌属的LEfSe分析结果, figureFileSmall=jrYURR7YnW8CIO9+7m9rSg==, figureFileBig=Ua479oR5vjC3U1L3YT6iRw==, tableContent=null)], attaches=null, journal=Journal(id=1319372634082869396, delFlag=0, nameCn=陆军军医大学学报, nameEn=Journal of Army Medical University, nameHistory1=null, nameHistory2=null, issn=2097-0927, eissn=null, cn=50-1223/R, coden=null, periodic=3, 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=zdiTazv9TbsMJqLaCJ/k7A==, journalPrice=null, startedYear=null, abbrevIsoEn=Journal of Army Medical University, journalRemark=null, publicationField=null, createdTime=1792492548725, updatedTime=1792745216517, createdBy=18614031015, updatedBy=13701087609, firstLetterCn=L, 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