克罗恩病患者肠道菌群多样性变化研究初探

被引：16

作者：

沈海燕 ^{[1
]}

阮水良 ^{[1
]}

徐水凌 ^{[2
]}

陆其明 ^{[1
]}

杨志宏 ^{[1
]}

罗鼎天 ^{[1
]}

陈春晓 ^{[3
]}

机构：

[1] 嘉兴学院医学院附属第二医院消化内科

[2] 嘉兴学院医学院

[3] 浙江大学医学院附属第一医院消化内科

来源：

中国微生态学杂志 | 2016年 / 28卷 / 06期

关键词：

克罗恩病; 肠道菌群; 16SrRNA高通量测序; 多样性;

D O I：

暂无

中图分类号：

R574.62 [结肠疾病];

学科分类号：

100201 [内科学];

摘要：

目的探讨克罗恩病(CD)患者肠道菌群多样性变化。方法收集8例确诊CD患者的粪便标本(CD组),以同期8例健康人群粪便作为对照组(CN组)。收集新鲜粪便样本提取DNA,并将样本进行PCR扩增,最终进行16SrRNA数据分析。结果测序共获得990 890条高质量序列,CD组和CN组多样性指数Shannon和Simpson比较差异有统计学意义(t=-3.802和t=-2.886,P<0.05)。OTUs(可操作分类学单位)比较韦恩图显示CD组共有7 437株菌种,而CN组共有7 744株菌种,其中3 438株菌种重叠。LDA差异贡献分析图提示CD患者肠道菌群以芽胞杆菌、变形菌、乳杆菌目、放线菌目、异常球菌纲、栖热菌目、假单胞菌目和交替单胞菌目等为主要特征差异细菌菌类,而CN组则以双歧杆菌目及双歧杆菌科,Odoribacteraceae、Christensenellaceae、弧菌目及弧菌科等为主要特征差异细菌菌类。据物种进化树的样本菌落分布图显示:两组样本厚壁菌门、放线菌门、拟杆菌门、变形菌门、疣微菌门、酸杆菌门和螺旋菌门占主要门类分布。CD组及CN组细菌科类分析结果:毛螺菌科、韦荣球菌科、瘤胃菌科、丹毒丝菌科、红蝽菌科、紫单胞菌科、双歧杆菌科、普雷沃菌科、拟杆菌科、产碱菌科和链球菌科在两组样本中共同存在。同时从该进化树可发现,CD组中红蝽菌科、产碱菌科、丹毒丝菌科和链球菌科相对于CN组优势丰度分布,而普雷沃菌科、拟杆菌科和双歧杆菌科比CN组丰度明显减少。此外,Dethiosulfovibrionaceae、丙酸杆菌科、盐单胞菌科、希万菌科等为CD组特有菌种。结论 CD组的菌群多样性明显少于CN组,CD组有其特有优势菌群。

引用

页码：662 / 666

页数：5

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