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Diverse patterns of cyclooxygenase‐independent metalloproteinase gene regulation in human monocytes
Author(s) -
Reel Buket,
SalaNewby Graciela B,
Huang WeiChun,
Newby Andrew C.
Publication year - 2011
Publication title -
british journal of pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.432
H-Index - 211
eISSN - 1476-5381
pISSN - 0007-1188
DOI - 10.1111/j.1476-5381.2011.01298.x
Subject(s) - forskolin , matrix metalloproteinase , monocyte , tissue inhibitor of metalloproteinase , microbiology and biotechnology , fibronectin , biology , inflammation , endocrinology , p38 mitogen activated protein kinases , stimulation , medicine , protein kinase a , kinase , immunology , extracellular matrix , biochemistry
BACKGROUND AND PURPOSE Matrix metalloproteinase (MMP) production from monocyte/macrophages is implicated in matrix remodelling and modulation of inflammation. However, knowledge of the patterns and mechanisms of gene regulation of MMPs and their endogenous tissue inhibitors (TIMPs) is fragmentary. MMP up‐regulation may be a target for cyclooxygenase (COX) and prostaglandin (PG) receptor inhibition, but the extent and mechanisms of COX‐independent MMP up‐regulation are unclear. EXPERIMENTAL APPROACH We studied MMP mRNA expression and selected protein levels in human peripheral blood monocytes before and after adhesion, upon stimulation with bacterial lipopolysaccharide (LPS), PGE 2 or forskolin and after culturing with monocyte colony‐stimulating factor on plastic or human fibronectin for up to 7 days. KEY RESULTS Monocyte adherence for 2 h transiently up‐regulated COX‐2, MMP‐1, MMP‐7 and MMP‐10 mRNAs, and persistently up‐regulated MMP‐2, MMP‐9, MMP‐14 and MMP‐19 mRNAs. LPS, PGE 2 or forskolin selectively increased MMP‐1, MMP‐9, MMP‐10, MMP‐12 and MMP‐14 mRNAs. LPS increased PGE 2 production through COX but up‐regulated MMP levels independently of COX. Differential dependence on inhibition of p42/44 and p38 mitogen‐activated protein kinases, c‐jun N‐terminal kinase and inhibitor of κB kinase2 paralleled the diverse patterns of MMP stimulation by LPS. Differentiation on plastic increased mRNA levels of MMP‐7, MMP‐9, MMP‐12 and MMP‐14 and TIMP‐2 and TIMP‐3 independently of COX; fibronectin accelerated MMP but not TIMP up‐regulation. CONCLUSIONS AND IMPLICATIONS Adhesion, LPS stimulation and maturation of human monocytes lead to selective, COX‐independent MMP and TIMP gene regulation, which is a potential target for selective inhibition by signalling kinase inhibitors.