Drug resistance-associated genes: A cornerstone for the control and protection against tuberculosis

BGI in collaboration with Institute of Biophysics, Chinese Academy of Sciences, and other Chinese institutes, have completed the genome sequencing of 161 Mycobacterium tuberculosis that can cause an infectious disease tuberculosis (TB). The study published online in Nature Genetics provides an invaluable resource for researchers to better understand the genetic basis underlying drug resistance TB.

TB is one of the deadliest infectious diseases. The World Health Organization estimates that one-third of the world's population is infected with M. tuberculosis. Although TB control efforts have made an encouraging 1.3% decline in TB incidence worldwide each year since 2002, drug-resistant TB is still a serious and growing global challenge for treatment. The drug resistance is particularly acute in China, where 5.7% of new TB cases are multidrug-resistant (MDR), and 8% of MDR cases are extensively drug-resistant (XDR).

To understand the drug resistance mechanism from DNA level, Chinese researchers conducted a comprehensive genome-wide study of 161 M. tuberculosis strains with a broad range of resistance profiles (44 drug-sensitive, 94 MDR and 23 XDR isolates). In total, they discovered 72 novel genes, 28 intergenic regions (IGRs), 11 nonsynonymous SNPs and 10 IGR SNPs with strong, consistent associations with drug resistance.

Researchers found that the genetic basis of drug resistance is more complex than previously expected. The identification of new drug resistance–associated genes, IGRs and SNPs provides a nearly complete gene set for studying drug resistance TB. These findings lay a solid foundation for the in-depth investigation of the drug in both M. tuberculosis and other bacterial pathogens treated with the same antibiotic regimens.

Dongfang Li, Project manager from BGI, said, "The drug resistance of M. tuberculosis is a very serious problem, especially in China. We expect our breakthrough can shed new insights for exploring the mechanisms of , and lay a solid foundation for the control and protection against TB."

add to favorites email to friend print save as pdf

Related Stories

Drug-resistant tuberculosis rife in China

Dec 11, 2008

Levels of drug-resistant tuberculosis (TB) in China are nearly twice the global average. Nationwide research published in the open access journal BMC Infectious Diseases has shown that almost 10% of Chinese TB cases are re ...

Potential new drug for tuberculosis

Aug 05, 2013

A new drug capable of inhibiting growth of Mycobacterium tuberculosis is reported this week in Nature Medicine. The findings may improve therapeutic options for the treatment of drug resistant tuberculosis (TB). ...

Recommended for you

Study reveals gene expression patterns in pancreatic CTCs

18 hours ago

Analysis of circulating tumor cells (CTCs) in a mouse model of pancreatic cancer identified distinct patterns of gene expression in several groups of CTCs, including significant differences from the primary tumor that may ...

Lack of thyroid hormone blocks hearing development

23 hours ago

Fatigue, weight gain, chills, hair loss, anxiety, excessive perspiration—these symptoms are a few of the signs that the thyroid gland, which regulates the body's heart rate and plays a crucial role in its ...

User comments