Are gastric mucosal mast cells increased in Helicobacter pylori-negative functional dyspepsia?
Mast cells are increased in functional dyspepsia, independently of inflammation. This might contribute to the pathogenesis of functional dyspepsia by altering signaling in the brain-gut axis.
In the present study, we show that, in human cells, after heterologous expression of GFP-Ypt11 (where GFP stands for green fluorescent protein), the protein is targeted to transferrin-positive recycling endosomes. This compartment has been shown to form extensive tubular networks on applying the drug Brefeldin A. We also show, by confocal fluorescent microscopy, that these networks also contain Rab11 in cells expressing CFP-Rab11a (where CFP stands for cyan fluorescent protein) fusion protein and that these structures are identical with those targeted by GFP-Ypt11.