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The biggest bug in gut discomfort

t cell, and was briefly cloaked in the early endosomal marker EEA-1, and then the late endosomal marker Lamp-1. Was C. jejuni trafficking to conventional lysosomes after all" To check, the researchers fed traceable dyes to infected cells. Taken up into the endocytic pathway, the fluorescent dyes co-localized with control bacteria known to traffic to lysosomes, yet surprisingly the dyes were unable to enter vacuoles containing C. jejuni. The bug had left the conventional endocytic pathway.

Watson and Galan also investigated the roles of two Rab GTPases, proteins involved in the maturation of endosomal compartments. These and other experiments provided additional evidence that C. jejuni leaves the normal endocytic pathway early and that the segregated C. jejuni vacuoles move to a perinuclear location where they become closely associated with the Golgi apparatus. The resulting full-scale invasion of millions of cells lining the gut can’t be ignored.
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Source:American Society for Cell Biology


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