[Relation between gastric dendritic cells and H pylori-associated gastritis].

Aim: To investigate the effects of gastric dendritic cells(DCs) in H.pylori-associated gastritis.

Methods: Mononuclear cells were isolated from gastric samples of endoscoped healthy subjects or patients with gastritis by Ficoll-hypaquetechnique. HLA-DR(+);DCs were further isolated by MACS. Rapid urease test, warthin-starry dyer and C(14);-urea breath test were used to detect H.pylori. The relationship between the quantity of gastric DCs and H.pylori density or inflammatory background were analysed.

Results: The gastric mononuclear cells from H.pylori-infected normal gastric mucosa contained more HLA-DR(+);DCs (17.93 % ) than that from noninfected subjects (4.93%).The quantity of gastric DCs is positively correlated with H.pylori density. The quantity of gastric DCs were significantly higher in moderate and high inflammatory gastric mucosa than that in low inflammatory gastric mucosa. There was no difference in the quantity of gastric DCs between moderate and high inflammatory gastric mucosa.

Conclusion: Successfully isolated gastric DCs. DCs may play a role in the early stage of H.pylori-associated gastritis.