Mass-spectrometry based minisequencing method for the rapid detection of drug resistance in Mycobacterium tuberculosis

J Microbiol Methods. 2007 Sep;70(3):395-405. doi: 10.1016/j.mimet.2007.05.015. Epub 2007 May 31.

Abstract

A MALDI TOF MS based minisequencing method has been developed and applied for the analysis of rifampin (RIF)- and isoniazid (INH)-resistant M. tuberculosis strains. Eight genetic markers of RIF resistance-nucleotide polymorphisms located in RRDR of rpoB gene, and three of INH resistance including codon 315 of katG gene and -8 and -15 positions of the promoter region of fabG1-inhA operon were worked out. Based on the analysis of 100 M. tuberculosis strains collected from the Moscow region in 1997-2005 we deduced that 91% of RIF-resistant and 94% of INH-resistant strains can be identified using the technique suggested. The approach is rapid, reliable and allows to reveal the drug resistance of M. tuberculosis strains within 12 h after sample isolation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacterial Proteins / genetics
  • Catalase / genetics
  • DNA Probes / genetics
  • DNA-Directed RNA Polymerases
  • Databases, Nucleic Acid*
  • Drug Resistance, Multiple, Bacterial / genetics*
  • Genetic Markers / genetics
  • Humans
  • Isoniazid / pharmacology
  • Mycobacterium tuberculosis / chemistry
  • Mycobacterium tuberculosis / drug effects
  • Mycobacterium tuberculosis / genetics*
  • Point Mutation
  • Polymerase Chain Reaction / methods
  • Promoter Regions, Genetic
  • Rifampin / pharmacology
  • Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / methods*
  • Tuberculosis, Multidrug-Resistant / microbiology

Substances

  • Bacterial Proteins
  • DNA Probes
  • Genetic Markers
  • rpoB protein, Mycobacterium tuberculosis
  • Catalase
  • katG protein, Mycobacterium tuberculosis
  • DNA-Directed RNA Polymerases
  • Isoniazid
  • Rifampin