Distinct patterns of mucosal apoptosis in H pylori-associated gastric ulcer are associated with altered FasL and perforin cytotoxic pathways

Figure 4 Double immunofluorescence analysis. Expression of CD3 (FITC) and Fas (R-PE) in the ulcer margin of a patient with gastric ulcer (A) and a non-infected control (B). Expression of CD68 (FITC) and Fas (R-PE) in the antrum of a patient with gastric ulcer (C) and a patient with H pylori-related gastritis (D). Images obtained by confocal microscopy. Arrows show CD3 or CD68 (FITC)-single-positive cells (green) without correspondent Fas (R-PE)-positive cells in the lamina propria of the same tissue section.