Pyrosequencing 분석법을 이용한 Rifampicin과 Isoniazid 결핵약제내성의 빠른 검사법
Pyrosequencing Based Detection of Rifampicin or Isoniazid Resistant in Mycobacterium tuberculosis
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Abstract
Rifampicin (RIF) and isoniazid (INH) are the most important drug for the treatment of Mycobacterium tuberculosis. Mutations correlated to rifampicin and isoniazid-resistance have been detected in rpoB gene and katG gene, respectively. Of the rifampicin-resistant isolates, 90% showed mutations in rpoB gene at codon 507 to 533. Isoniazid-resistant isolates analysed had a mutation in katG at codon 315. The aim of this study is to develop a pyrosequencing-based approach for rapid detection of ripampin or isoniazid resistant M. tuberculosis based on characterization of all possible mutation in the target region. For this study, the DNA selected from 35 cases of MTB PCR positive clinical sample such as bronchial washing, sputum, and pleural fluid. RIF or INH resistant was analyzed by pyrosequencing data of rpoB and katG gene. 28 (80%) and 7 (20%) of 35 MTB PCR positive DNAs were occured rifampicin-sensitivity and resistant, respectively. For INH, 30 (85.7%) and 5 (14.5%) cases were detected isoniazid-sensitivity and resistant, respectively. When pyrosequencing analysis was compared with ABI sequencing analysis, both analysis were presented same result, but pyrosequencing analysis was more rapid than ABI sequencing analysis. In conclusion, we found that pyrosequencing technology offers high accuracy, specificity, short turn around time and a high throughput in detection of rifampicin or isoniazid resistance in M. tuberculosis.
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