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- W1598497768 abstract "Abstract : In the current research plan, we proposed to study the mechanism for activation of matriptase, a membrane-bound serine protease. Previously, we showed matriptase is activated via transactivation, where the interactions among latent matriptase molecules, HAI-1, and other unidentified proteins are required for the proceeding of activational cleavage. In non-transformed mammary epithelial cells, matriptase activation can be induced by sphingosine 1-phosphate (S1P), a blood-borne bioactive phospholipid. We further showed that S1P induces matriptase translocation and accumulation at cell-cell contacts where activation occurs, a process depending on the assembly of adherens junctions and formation of subcortical actin belts in response to Sip exposure. In the final year, we showed that both matriptase and HAI-1 are accumulated at activation foci during matriptase activation. The dual roles of HAI-i in matriptase activation and inhibition results in immediate inhibition of matriptase right after the activation of the protease. The close temporal and spatial coupling of matriptase activation with its inhibition suggests that the protealytic activity of this enzyme must be well controlled, and that the proteolysis of matriptase substrates may be tightly regulated by this mechanism." @default.
- W1598497768 created "2016-06-24" @default.
- W1598497768 creator A5077785979 @default.
- W1598497768 date "2003-06-01" @default.
- W1598497768 modified "2023-09-24" @default.
- W1598497768 title "Matriptase Activation in Breast Cancer Progression" @default.
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- W1598497768 doi "https://doi.org/10.21236/ada417787" @default.
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