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  • Title: Selective activation of JNK/SAPK by interleukin-1 in rabbit liver is mediated by MKK7.
    Author: Finch A, Holland P, Cooper J, Saklatvala J, Kracht M.
    Journal: FEBS Lett; 1997 Nov 24; 418(1-2):144-8. PubMed ID: 9414114.
    Abstract:
    Activation of jun N-terminal kinase (JNK)/stress-activated protein kinase (SAPK) by interleukin-1 (IL-1) has been reported in many cells and in rabbit liver. Here we report selective activation of JNK/SAPK, without activation of p38 or p42 mitogen-activated protein kinases (MAPKs), by IL-1 in rabbit liver. We identified an IL-1 regulated JNK/SAPK activator present in rabbit liver using S Sepharose chromatography. It was purified and immunoprecipitated by two antisera to MAP kinase kinase 7 (MKK7). It was not recognised by an antibody to MKK4. We conclude that MKK7 is the activator of JNK/SAPK activated by IL-1 in liver and that JNK/SAPK is the only MAPK activated by IL-1 in liver.
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