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Related Concept Videos

DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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Related Experiment Video

Updated: Jul 4, 2026

Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray
07:35

Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray

Published on: April 25, 2014

Five-antituberculosis Drug-resistance Genes Detection Using Array System.

Yasuo Shimizu1, Kunio Dobashi, Yoko Yoshikawa

  • 1Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan.

Journal of Clinical Biochemistry and Nutrition
|June 12, 2008
PubMed
Summary
This summary is machine-generated.

A DNA microarray offers a rapid method for detecting drug resistance in Mycobacterium tuberculosis, showing high sensitivity for five key drugs. However, specificity for some drugs like isoniazid requires further improvement for clinical use.

Keywords:
DNA microarrayMycobacterium tuberculosismultidrug resistancerapid diagnosis

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Related Experiment Videos

Last Updated: Jul 4, 2026

Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray
07:35

Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray

Published on: April 25, 2014

Matrix-based DNA Extraction for Targeted Next-Generation Sequencing on Decontaminated Sputum Samples
06:07

Matrix-based DNA Extraction for Targeted Next-Generation Sequencing on Decontaminated Sputum Samples

Published on: June 6, 2025

Area of Science:

  • Microbiology
  • Molecular Biology
  • Genetics

Background:

  • Culture-based methods for detecting drug resistance in Mycobacterium tuberculosis are time-consuming, often taking up to two months.
  • Rapid and accurate detection of drug resistance is crucial for effective tuberculosis treatment and management.

Purpose of the Study:

  • To evaluate a DNA microarray as a rapid method for detecting resistance to five antituberculosis drugs.
  • To assess the potential clinical utility of DNA microarray analysis for Mycobacterium tuberculosis drug resistance.

Main Methods:

  • DNA was isolated from sputum samples of patients with Mycobacterium tuberculosis.
  • A DNA microarray was used to detect seven specific gene mutations associated with resistance to five antituberculosis drugs.
  • Microarray results were compared against the standard Lowenstein-Jensen drug sensitivity testing (DST) culture method.

Main Results:

  • The DNA microarray demonstrated high sensitivity (>90%) for all five antituberculosis drugs tested.
  • Specificities for rifampicin and ethambutol were approximately 90%, while isoniazid (60%) and kanamycin (67%) showed lower specificity.
  • The method requires a minimum bacterial load equivalent to 1-9 Acid-Fast Bacilli per 10 fields.

Conclusions:

  • DNA microarray analysis shows promise as a rapid tool for estimating drug resistance in Mycobacterium tuberculosis.
  • Limitations in specificity for certain drugs and the need for adequate bacterial load necessitate further refinement.
  • Confirmation of bacillary load and potential use of culture methods for comparison are recommended for PCR-based array systems.