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SYNDROME D'ACTIVATION MACROPHAGIQUE CHEZ L ... - Toubkal

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Figure 6 : Défaut d’activité cytotoxique des lymphocytes T CD8 et NK [26] :Molecular mechanisms based on the identification of genetic defects associated with the clinicalpicture of familial hemophagocytic lymphohistiocytosis (FHLH), Griscelli syndrome (GS-2) andChédiak-Higashi syndrome (CHS). Perforin is secreted via cytotoxic granules and leads to disruptionof the target cell. Cytotoxic granule processing occurs by means of a complex that contains at least aRab27α/Munc13-4 complex and severalother unknown proteins. The exact functions of LYST and syntaxin 11 are not known. In case ofsyntaxin 11, monocytes or macrophages/dendritic cells may interact with cytotoxic cells by anunknown mechanism.26

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