TIMP-1and TIMP-2 have similar properties, specifically in inhibiting enzymes of matrix metalloproteinase family, and are thought to be of great importance in the maintenance of connective tissue integrity. TIMP-1 forms a complex of 1:1 stoichiometry with activated interstitial collagenase, activated stromelysin, active form of 72kDa Type IV collagenase (also known as MMP-2 or gelatinase A), and latent and active forms of 92kDa Type IV collagenase (also known as MMP-9 or gelatinase B). TIMPs inhibit the proteolytic invasiveness of tumor cells and normal placental trophoblast cells. Applications: Suitable for use in ELISA, Immunohistochemistry and Western Blot. Other applications not tested. Recommended Dilution: Immunohistochemistry: Frozen sections or acetone-fixed tissues. Formalin-fixed, paraffin-embedded sections are usually not reactive. PLP fixation is suggested as an alternative for paraffin-embedded sectons. Western Blot: 1:1,000. Identifies a band of approximately 30KDa. Note TIMP-1 is found in very low concentrations in most cells and tissues. Positive control is HT1080 cells treated with PMA or recombinant TIMP-1 protein. Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
