Article: Helicobacter pylori induces direct activation of the lymphotoxin beta receptor and non-canonical nuclear factor-kappa B signaling.
Biochimica et biophysica acta. Molecular cell research
2018 Volume 1865, Issue 4, Page(s) 545–550
Abstract: ... for a type IV secretion system (T4SS). The T4SS induces fast canonical nuclear factor-kappa B (NF-κB ...
Abstract | The pathogen Helicobacter pylori, which infects half of the world's population, is a major risk factor for the development of gastric diseases including chronic gastritis and gastric cancer. Among H. pylori's virulence factors is the cytotoxin-associated gene pathogenicity island (cagPAI), which encodes for a type IV secretion system (T4SS). The T4SS induces fast canonical nuclear factor-kappa B (NF-κB) signaling, a major factor increasing inflammation, supressing apoptotic cell death and thereby promoting the development of neoplasia. However, H. pylori's capability to mediate fast non-canonical NF-κB signaling is unresolved, despite a contribution of non-canonical NF-κB signaling to gastric cancer has been suggested. We analyzed signaling elements within non-canonical NF-κB in response to H. pylori in epithelial cell lines by immunoprecipitation, immunoblot, electrophoretic mobility shift assay and RNA interference knockdown. In addition, tissue samples of H. pylori-infected patients were investigated by immunohistochemistry. Here, we provide evidence for a T4SS-dependent direct activation of non-canonical NF-κB signaling. We identified the lymphotoxin beta receptor (LTβR) to elicit the fast release of NF-κB inducing kinase (NIK) from the receptor complex leading to non-canonical NF-κB signaling. Further, NIK expression was increased in human biopsies of H. pylori-associated gastritis. Thus, NIK could represent a novel target to reduce Helicobacter pylori-induced gastric inflammation and pathology. |
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MeSH term(s) | Adult ; Aged ; Aged, 80 and over ; Antigens, Bacterial/metabolism ; Bacterial Proteins/metabolism ; Bacterial Secretion Systems ; HeLa Cells ; Helicobacter pylori/metabolism ; Humans ; Lymphotoxin beta Receptor/metabolism ; Middle Aged ; Models, Biological ; Mucous Membrane/metabolism ; NF-kappa B/metabolism ; Protein Serine-Threonine Kinases/metabolism ; Signal Transduction ; Stomach/pathology ; Young Adult ; NF-kappaB-Inducing Kinase |
Chemical Substances | Antigens, Bacterial ; Bacterial Proteins ; Bacterial Secretion Systems ; Lymphotoxin beta Receptor ; NF-kappa B ; cagA protein, Helicobacter pylori ; Protein Serine-Threonine Kinases (EC 2.7.11.1) |
Language | English |
Publishing date | 2018-01-09 |
Publishing country | Netherlands |
Document type | Journal Article ; Research Support, Non-U.S. Gov't |
ZDB-ID | 60-7 |
ISSN | 1879-2596 ; 1879-260X ; 1872-8006 ; 1879-2642 ; 1879-2618 ; 1879-2650 ; 0167-4889 ; 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399 |
ISSN (online) | 1879-2596 ; 1879-260X ; 1872-8006 ; 1879-2642 ; 1879-2618 ; 1879-2650 |
ISSN | 0167-4889 ; 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399 |
DOI | 10.1016/j.bbamcr.2018.01.006 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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