• Hemant Vira, Vandana Pradhan, Vinod Umare, Ajay Chaudhary, Anjali Rajadhyksha, Milind Nadkar, Kanjaksha Ghosh, and Anita Nadkarni.
• Department of Clinical & Experimental Immunology, National Institute of Immunohaematology, Indian Council of Medical Research, Mumbai, 400012, India.
• Biomark Med. 2019 Jan 1; 13 (1): 33-43.

AimTo investigate the possible association between MMP-9 (-1562 C/T) and TIMP-1 (372 T/C) polymorphism and inflammatory markers with disease activity in systemic lupus erythematosus (SLE) patients.Materials & Methods150 SLE patients were recruited. Disease severity was assessed by SLEDAI (SLE disease activity index). The polymorphisms were detected by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and serum levels by ELISA.ResultsAmong patients mean MMP-9 serum levels and mRNA expression were significantly decreased with increase in TIMP-1 levels (p < 0.0001). Concomitant presence of both MMP-9 1562 T and TIMP-1 372 C alleles synergistically increased risk of SLE by 7.89-fold (p < 0.0001). The mRNA expression of MMP-9 and TIMP-1 correlated with SLEDAI score.ConclusionMMP-9, TIMP-1 and MMP-9/TIMP-1 ratios may act as biomarkers for susceptibility to SLE.

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