Host gene-encoded severe lung TB: From genes to the potential pathways

M. Ganachari, H. Guio, N. Zhao, P. O. Flores-Villanueva

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


We are reporting that the two-locus genotype-2518 macrophage chemoattractant protein (MCP)-1 GG and-1607 matrix metalloproteinase (MMP)-1 2G/2G promotes the expression of hyperinflammation in response to Mycobacterium tuberculosis infection, inducing extensive tissue damage and severe tuberculosis (TB) disease. Carriers of this two-locus genotype have a 13-fold higher chance of developing severe disease and 6.5-fold higher chance of developing permanent lesions, and a 3.864-fold higher chance of delayed response to first-line standardized treatment than carriers of any other relevant combination of genotypes at those two loci. Thus, these persons have an increased likelihood of poor health-related quality of life and of transmitting M. tuberculosis to other members of the community. In addition, through the analysis of human lung tissues, serum/plasma and in vitro experiments, including in vitro infections of THP-1 cells with M. tuberculosis and microarray analysis, we determined that this hyperinflammation state is potentially driven by the MCP-1/MMP-1/PAR-1 pathway. Hence, we are providing markers for the identification of TB cases that may develop severe pulmonary disease and delayed response to treatment, and are providing the basis for development of novel host-targeted clinical interventions to ameliorate the severity of pulmonary TB.

Original languageEnglish (US)
Pages (from-to)605-620
Number of pages16
JournalGenes and Immunity
Issue number8
StatePublished - Dec 2012


  • disease severity
  • genetics
  • MCP-1
  • MMP-1
  • tuberculosis

ASJC Scopus subject areas

  • Genetics(clinical)
  • Immunology
  • Genetics


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