The role of IL-18 and IL-12 in the modulation of matrix metalloproteinases and their tissue inhibitors in monocytic cells

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Abstract

The matrix metalloproteinases (MMP) are enzymes crucial for the physiological patrol as well as pathological chemotaxis of immune cells to target tissues. The present study examined differential effects of pro-inflammatory [IL-18, IL-12 and tumor necrosis factor (TNF)-α] versus anti-inflammatory (IL-4) cytokines on the modulation of MMP and their endogenous tissue inhibitors (TIMP) expression in the U937 cell line. IL-18 and IL-12 separately and synergistically enhanced MMP-2, while TNF-α led to the elevation of MMP-9. All pro-inflammatory cytokines enhanced MT1-MMP expression and IL-4 suppressed TNF-α-induced MMP-9 expression. This study demonstrated that elevated IL-18 and IL-12, and related pro-inflammatory activity, may be associated with aberrant MMP activity, suggesting modulation of MMP expression using IL-12 and IL-18 antagonists as future therapeutic strategies to attenuate inflammatory and autoimmune disorders.

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Abraham, M., Shapiro, S., Lahat, N., & Miller, A. (2002, December 1). The role of IL-18 and IL-12 in the modulation of matrix metalloproteinases and their tissue inhibitors in monocytic cells. International Immunology. https://doi.org/10.1093/intimm/dxf108

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