Role of MMP 9 in the diagnosis and management of pulmonary tuberculosis and its association with nutritional status
Keywords:MMP9, pulmonary tuberculosis, albumin, iron, DOTS therapy
Introductionand Aim: Etiopathogenesis of Pulmonary tuberculosis(PTB), is well established. Yet, the mechanisms by which a treatment regimen brings about remodelling of the pulmonary tissue during recovery phase is not well understood. The involvement of matrix metalloproteinase in this regard is debated, due to its dual role, either in disseminating the disease due to lung cavitation or reducing the inflammation due to recruitment of macrophages to the lung granulomas. PTB is a disease also driven by undernourishment.This study focuses on the association of nutritional status of PTB patients in restoring healthy lung tissue, monitored by blood levels of albumin, iron and MMP9, during the course of intensive treatment.
Materials and Methods: Serum levels of MMP9, iron, Total protein and albumin were estimated in 30 PTB patients who visited the Directly Observed Treatment Short course (DOTS) Centre at Government Wenlock Hospital, Mangalore, Karnataka,India. Twenty controls were enrolled for comparative statistics. Samples were collected at baseline and after two months of DOTS treatment in case of patients.Pre-treatment and post treatment values were compared by paired t test.Student’s ‘t’ test was used for comparing parameters in controls and patients. Correlation between parameters was done by Pearson’s correlation test.
Results: A significant increase was observed in serum iron (P=0.002) and total protein(P=0.01) levels post treatment but there was no significance in the levels of MMP9. Further, serum MMP9 correlatednegatively with body weight, BMI and serum total protein levels, post treatment, which was statistically significant. No other correlations were significant.
Conclusion: We conclude that MMP9 neither seems to be a diagnostic marker nor a therapeutic target in the treatment of tuberculosis. Although serum iron appears to be a predictor of improved nutritional status post treatment, it probably may have a role in tissue remodelling independent of MMP-9.
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