Effects of the Mycobacterium tuberculosis prokaryotic ubiquitin-like protein-proteasome system on the mono-resistant to rifampin resistance to Mycobacterium tuberculosis
1. Department of Pathophysiology,Shihezi University School of Medicine/The Key Laboratory of Xinjiang Endemic and Ethnic Diseases/Collaborative Innovation Center of High Incidence of Zoonoses Communicable Disease Prevention in the Western Region,Shihezi 832002,China; 2. Emergency Surgery Department,the First Affiliated Hospital of Shihezi University Medical College,Shihezi 832002,China; 3. Department of Neurosurgery,the First Affiliated Hospital of Shihezi University Medical College,Shihezi 832002,China; 4. Department of Critical Medicine,the First Affiliated Hospital of Shihezi University Medical College,Shihezi 832002,China
Abstract:We studied the effect of the Mycobacterium tuberculosis prokaryotic ubiquitin-like protein-proteasome system on mono-resistant to rifampin resistance to M. tuberculosis. A resazurin-based assay was employed to evaluate minimum inhibitory concentration (MIC) and comparative research on mono-resistant to rifampin MTB with Pup,Dop,PafA,Mpa genes expression and deletion of the difference. Above testing strains,respectively,carbonyl cyanide chlorobenzene hydrazone (CCCP),reserpine (RP),verapamil (VP) and chlorpromazine (CPZ) were tested. We compared and analyzed the change of rifampicin MICs on the various strains. Compared with rifampin resistant MTB,overexpression of Pup,Dop,PafA and Mpa genes were able to make mono-rifampicin of M. tuberculosis to enhance resistance to rifampin. Deletion of Pup gene,Mpa gene,Dop gene,PafA gene significantly decreased the resistance to rifampicin alone MTB,and the P value was <0.05. Results indicated that 4 kinds of efflux pump inhibitors can reduce the degree of rifampin MIC in different strains. Through the factorial analysis,there were some interactions between MTB and PPS efflux pump inhibitors,and the P value was <0.05. MTB PPS has influence on mono-rifampin resistance to MTB and it may regulate the efflux pathway related protein to influence its resistance.
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