畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (8): 1471-1476.doi: 10.11843/j.issn.0366-6964.2015.08.025

• 研究简报 • 上一篇    

基于16S rRNA基因的鼠Mycoplasma haemomuris的分子鉴定和种系发育分析

白挨泉1,李高强1.2,郭建超1.2,李欣1,蒲文珺1,李国清2,陈志伟3,张浩吉1*   

  1. (1.佛山科学技术学院,佛山 528231;2.华南农业大学,广州 510642;3.香港大学李嘉诚医学院,香港 999077)
  • 收稿日期:2015-04-08 出版日期:2015-08-23 发布日期:2015-08-23
  • 通讯作者: 张浩吉,E-mail:zhanghaoji@aliyun.com
  • 作者简介:白挨泉(1970-),男,山西兴县人,副教授,硕士,主要从事动物传染病的教学和科研工作
  • 基金资助:

    广东省自然科学基金项目(S2013010012475);广东省教育厅科技创新项目 (2013KJCX0187)

Molecular Identification and Phylogenetic Analysis of Mycoplasma haemomuris Isolates from Wild Rattus edwardsi based on 16S Ribosomal RNA Gene

BAI Ai-quan1,LI Gao-qiang1,2,GUO Jian-chao1,2,LI Xin1,PU Wen-jun1,LI Guo-qing2,CHEN Zhi-wei3,ZHANG Hao-ji1*   

  1. (1.School of Life Sciences,Foshan University,Foshan 528231,China;2.College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China;3.AIDS Institute,Li Ka Shing Faculty of Medicine,The University of Hong Kong,Hong Kong SAR 999077,China)
  • Received:2015-04-08 Online:2015-08-23 Published:2015-08-23

摘要:

为了从分子水平揭示野生鼠类血原体的种类特征和系统发生关系,无菌采集32份野生白腹巨鼠血样,抽提全血基因组DNA,采用真细菌的通用引物进行16S rRNA基因的扩增,对扩增产物进行克隆和测序。结果从其中21只血样中成功地扩增出目的片段大小的核苷酸序列。对阳性产物进行克隆、测序,获得了两条代表性序列(GenBank登录号HQ183731和 HQ183732)。序列分析显示,获得的两条序列与GenBank中收录的鼠Mycoplasma haemomuris 16S rRNA 基因(AB758435)相似性最高,分别为95%和97%。两个样本间16S rRNA 基因序列相似性达98.3%。种系发育分析表明,获得白腹巨鼠血原体的两条序列形成了独立的进化分支,并与来自野鼠的Haemobartonella muris (HMU82963) 和来自家鼠M.haemomuris (AB758435) 所形成的进化分枝为姊妹枝。上述研究证明,白腹巨鼠具有较普遍的M.haemomuris感染,并与已报道的啮齿动物M.haemomuris有一定的遗传差异,是一种新基因型的血原体。对进一步研究人和动物的亲血性支原体的流行病学、种群生物学等研究具有一定价值。

Abstract:

This experiment was conducted to study the species characteristic and phylogenetic relationship of hemoplasmas from the wild rats on molecular level.Thirty-two blood samples collected from wild Rattus edwardsi in Hunan and Guangxi province of China were investigated by PCR aplication based on the 16S rRNA gene sequence.The total infection rate of hemoplasmas was 65.63% (21/32).Genetic variations showed that the inter-specific differences between M.haemomuris isolates and other Mycoplasma species (3.0%-4.5%) were bigger than that (0.8%) between two synonymic species (Haemobartonella muris and M.haemomuris).Phylogenetic analyses indicated that M.haemomuris derived from wild Rattus edwardsi grouped into a solitary clade closely related to H.muris and M.haemomuris. The results suggested that M.haemomuris isolated in the present study should represent a new genotype,and temporarily named M. haemomuris Rattus edwardsi strain.These data may have important implications for researching epidemiology and population biology as well as for studying the taxonomy and status of the genus Mycoplasma.

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