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  • Title: Tissue inhibitor of metalloproteinase-2 (TIMP-2) has erythroid-potentiating activity.
    Author: Stetler-Stevenson WG, Bersch N, Golde DW.
    Journal: FEBS Lett; 1992 Jan 20; 296(2):231-4. PubMed ID: 1370805.
    Abstract:
    Tissue inhibitor of metalloproteinase (TIMP) was purified and molecularly cloned on the basis of its erythroid-potentiating activity (EPA). TIMP/EPA appears to be a bifunctional molecule with both growth factor and anti-enzymatic activity. Recently, a second TIMP-related molecule was identified and we have investigated its possible erythroid-potentiating activity. Native, purified human TIMP-2 was assayed for erythroid-potentiating activity using an in vitro erythroid burst formation assay and was compared with that of previously characterized recombinant EPA/TIMP-1. The results demonstrate that both members of the tissue inhibitor of metalloproteinase family, TIMP-1 and TIMP-2, possessed erythroid potentiating activity which was inhibited by antibodies developed to neutralize EPA. These results suggest that TIMP-2 shares a common structural domain with EPA/TIMP-1 that is responsible for the erythroid-potentiating activity of these inhibitors. Therefore, TIMP-1 and TIMP-2, with both anti-protease activity and growth factor activity, join a family of bifunctional molecules such as fibroblast growth factor and thrombin which have both enzymatic and growth factor activity.
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