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LPS resistance in monocytic cells caused by reverse signaling through transmembrane TNF (mTNF) is mediated by the MAPK/ERK pathway

Kirchner, Silvia ; Boldt, Simone ; Kolch, Walter ; Haffner, Silvia ; Kazak, Seran ; Janosch, Petra ; Holler, Ernst ; Andreesen, Reinhard ; Eissner, Günther


The transmembrane form of tumor necrosis factor (mTNF), expressed on activated monocytes (MO) and macrophages (MPhi), is able to induce apoptosis in human endothelial cells (EC). Apoptosis is mediated by two distinct mechanisms: direct cell contact and a yet-unidentified soluble protein, death factor X. In addition, mTNF acts as a receptor that transduces a "reverse signal" into MO/MPhi when ...


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