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- Title
Relationship between Helicobacter pylori Infection and Plasmacytoid and Myeloid Dendritic Cells in Peripheral Blood and Gastric Mucosa of Children.
- Authors
Helmin-Basa, Anna; Wiese-Szadkowska, Małgorzata; Szaflarska-Popławska, Anna; Kłosowski, Maciej; Januszewska, Milena; Bodnar, Magdalena; Marszałek, Andrzej; Gackowska, Lidia; Michalkiewicz, Jacek
- Abstract
Purpose. To investigate the frequency and activation status of peripheral plasmacytoid DCs (pDCs) and myeloid DCs (mDCs) as well as gastric mucosa DC subset distribution in Helicobacter pylori- (H. pylori-) infected and noninfected children. Materials and Methods. Thirty-six children were studied; twenty-one had H. pylori. The frequencies of circulating pDCs (lineage-HLA-DR+CD123+) and mDCs (lineage-HLA-DR+CD11c+) and their activation status (CD83, CD86, and HLA-DR expression) were assessed by flow cytometry. Additionally, the densities of CD11c+, CD123+, CD83+, CD86+, and LAMP3+ cells in the gastric mucosa were determined by immunohistochemistry. Results. The frequency of circulating CD83+ mDCs was higher in H. pylori-infected children than in the noninfected controls. The pDCs demonstrated upregulated HLA-DR surface expression, but no change in CD86 expression. Additionally, the densities of gastric lamina propria CD11c+ cells and epithelial pDCs were increased. There was a significant association between frequency of circulating CD83+ mDCs and gastric lamina propria mDC infiltration. Conclusion. This study shows that although H. pylori-infected children had an increased population of mature mDCs bearing CD83 in the peripheral blood, they lack mature CD83+ mDCs in the gastric mucosa, which may promote tolerance to local antigens rather than immunity. In addition, this may reduce excessive inflammatory activity as reported for children compared to adults.
- Subjects
GASTRIC mucosa; HELICOBACTER pylori infections; DENDRITIC cells; BLOOD cells; EPITHELIAL cells
- Publication
Mediators of Inflammation, 2019, p1
- ISSN
0962-9351
- Publication type
Article
- DOI
10.1155/2019/7190596