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Synergism between upregulation of Rab7 and inhibition of autophagic degradation caused by mycoplasma facilitates intracellular mycoplasma infection

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单位: [1]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Dept Gen Surg,Wuhan 430030,Hubei,Peoples R China [2]First Peoples Hosp Jiujiang City, Jiujiang 330300, Jiangxi, Peoples R China [3]Fifth Hosp Huangshi City, Huangshi 435004, Hubei, Peoples R China [4]Zhengzhou Univ, Affiliated Hosp 1, Dept Oncol, Zhengzhou 450052, Henan, Peoples R China
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关键词: mycoplasma endocytic pathway autophagy Rab7 LC3 p62

摘要:
Following fusion of a mycoplasma with a host cell membrane, the inserted components of mycoplasma may then be transported through the endocytic pathway. However, the effects of mycoplasmas on the host cell endomembrane system are largely unknown. In this study, mycoplasma-induced changes in the dynamics of endocytic and autophagic systems were investigated. Endocytosis and autophagy are two major processes involved in the survival of intracellular prokaryotic pathogens. It was found that, immediately following infection, mycoplasmas induce endocytosis in the host cell; however, in the long term the mycoplasmas suppress turnover of the components of the endocytic pathway. Immunofluorescence microscopy revealed that Rab7 and LC3-II are recruited to the intracellular mycoplasma-containing compartments. Western blot analysis and quantitative reverse transcription-polymerase chain reaction (qPCR) showed that mycoplasmas increase expression of Rab7 by upregulating transcription, but increase levels of LC3-II and p62 by post-translational regulation. Furthermore, it was demonstrated that mycoplasma infection causes inhibition of autophagic degradation of LC3-II and p62. In addition, it was found that upregulation of Rab7 and inhibition of autophagic degradation synergistically contributes to intracellular mycoplasma accumulation. In conclusion, these findings suggest that mycoplasmas may manipulate host cell endosomal and autophagic systems in order to facilitate intracellular infection.

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出版当年[2013]版:
大类 | 4 区 医学
小类 | 4 区 医学:研究与实验 4 区 肿瘤学
最新[2025]版:
大类 | 4 区 医学
小类 | 4 区 医学:研究与实验 4 区 肿瘤学
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出版当年[2012]版:
Q3 MEDICINE, RESEARCH & EXPERIMENTAL Q4 ONCOLOGY
最新[2024]版:
Q2 MEDICINE, RESEARCH & EXPERIMENTAL Q2 ONCOLOGY

影响因子: 最新[2024版] 最新五年平均 出版当年[2012版] 出版当年五年平均 出版前一年[2011版] 出版后一年[2013版]

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第一作者单位: [1]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Dept Gen Surg,Wuhan 430030,Hubei,Peoples R China
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通讯机构: [1]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Dept Gen Surg,Wuhan 430030,Hubei,Peoples R China [*1]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Dept Gen Surg,1095 Jiefang Ave,Wuhan 430030,Hubei,Peoples R China
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