PURPOSE To evaluate human corneal epithelial culture supernatant and tear fluid for the presence of activators and inhibitors of matrix metalloproteinase (MMP)-9, MMP-3, and tissue inhibitor of metalloproteinase (TIMP)-1, respectively, and to evaluate the effect of MMP-3 on the activation of MMP-9 in these specimens. METHODS Unstimulated tear fluid was collected from patients with ocular rosa...

Matrix metalloproteinases (MMP) play a crucial role in numerous pathological processes. Because cellular changes may be reflected in body fluids, measurements of MMP in blood have been recommended as noninvasive tools in diagnosis and monitoring of diseases (1 ). MMP measurements can be affected by the blood sampling procedures, as shown for gelatinase B (EC 3.4.24.25; MMP-9), for which higher ...

The cyclic growth, differentiation, and cell death of endometrium represents the most dynamic example of steroid-driven tissue turnover in human adults. Key effectors in these processes-matrix metalloproteinases (MMPs) and their specific inhibitors (TIMPs)-are regulated by ovarian steroids and, locally, by cytokines. We used reverse transcription-polymerase chain reaction to evaluate the expres...

Downlo rix metalloproteinase-9 (MMP-9) expression is known to enhance the invasion and metastasis of tumor n previous work based on a proteomic screen, we identified the serpin protease nexin-1 (PN-1) as a ial target of MMP-9. Here, we show that PN-1 is a substrate for MMP-9 and establish a link between egradation by MMP-9 and regulation of invasion. PN-1 levels increased in prostate carcinoma ...

Membrane type 1-matrix metalloproteinase (MT1-MMP/MMP-14) is a major collagenolytic enzyme that plays a vital role in development and morphogenesis. To elucidate further the structure-function relationship between the human MT1-MMP active site and the influence of the haemopexin domain on catalysis, substrate specificity and inhibition kinetics of the cdMT1-MMP (catalytic domain of MT1-MMP) and...

Recent studies suggest that interstitial collagenase (MMP-1) is an essential enzyme in the early events leading to menstruation. This study analyses its cellular origin, regulation and relation to extracellular matrix breakdown in the human endometrium, both in cultured and non-cultured samples. The source of MMP-1 was identified by in situ hybridization and by immunohistochemistry on serial se...

Regulated on activation, normal T expressed, and secreted (RANTES)/CC ligand 5 (CCL5) participates in rheumatoid arthritis (RA) pathogenesis by facilitating leukocyte infiltration, however, its other pathological functions are not fully defined in RA. In the present study, we evaluated the effect of RANTES/CCL5 on tissue degrading enzymes matrix metalloproteinase-1 (MMP-1) and MMP-13 expression...

OBJECTIVE Platelets are increasingly implicated in processes beyond hemostasis and thrombosis, such as vascular remodeling. Members of the matrix metalloproteinase (MMP) family not only remodel the extracellular matrix but also modulate platelet function. Here, we made a systematic comparison of the roles of MMP family members in acute thrombus formation under flow conditions and assessed plate...