T-bet Knockout Prevents Helicobacter felis-Induced Gastric Cancer

Helicobacter infection is the primary risk factor for gastric cancer, with the cytokine environment within the gastric mucosa the strongest predictor of disease risk. Elevated TNF-alpha, IL-1beta, and low IL-10 are associated with the highest risk. In this study, we used C57BL/6 mice to identify T-b...

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Published inThe Journal of immunology (1950) Vol. 183; no. 1; pp. 642 - 649
Main Authors Stoicov, Calin, Fan, Xueli, Liu, Jian Hua, Bowen, Glennice, Whary, Mark, Kurt-Jones, Evelyn, Houghton, JeanMarie
Format Journal Article
LanguageEnglish
Published United States Am Assoc Immnol 01.07.2009
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Abstract Helicobacter infection is the primary risk factor for gastric cancer, with the cytokine environment within the gastric mucosa the strongest predictor of disease risk. Elevated TNF-alpha, IL-1beta, and low IL-10 are associated with the highest risk. In this study, we used C57BL/6 mice to identify T-bet as a central regulator of the cytokine environment during Helicobacter felis infection. We infected male and female C57BL/6 and C57BL/6-T-bet knockout (KO) litter mates with H. felis and examined the bacterial colonization, immune response, and mucosal damage at varying time points. T-bet KO mice maintained infection for 15 mo at similar levels to wild-type mice. Infection and immune response did not differ between male and female mice. Despite sustained infection, T-bet KO mice respond with a blunted Th1 response associated with preservation of parietal and chief cells and protection from the development of gastric cancer. Unexpectedly, T-bet KO mice develop a gastric environment that would not be expected based on the phenotype of T-bet KO CD4 cells alone. T-bet KO mice respond to H. felis infection with a markedly blunted IL-1beta and TNF-alpha and elevated IL-10 levels. Activity of this one master regulator modulates the expression of the key gastric mucosal cytokines associated with gastric cancer and may be a target for therapy to restore immune balance clinically in patients at risk for gastric cancer.
AbstractList Abstract Helicobacter infection is the primary risk factor for gastric cancer, with the cytokine environment within the gastric mucosa the strongest predictor of disease risk. Elevated TNF-α, IL-1β, and low IL-10 are associated with the highest risk. In this study, we used C57BL/6 mice to identify T-bet as a central regulator of the cytokine environment during Helicobacter felis infection. We infected male and female C57BL/6 and C57BL/6-T-bet knockout (KO) liter mates with H. felis and examined the bacterial colonization, immune response, and mucosal damage at varying time points. T-bet KO mice maintained infection for 15 mo at similar levels to wild-type mice. Infection and immune response did not differ between male and female mice. Despite sustained infection, T-bet KO mice respond with a blunted Th1 response associated with preservation of parietal and chief cells and protection from the development of gastric cancer. Unexpectedly, T-bet KO mice develop a gastric environment that would not be expected based on the phenotype of T-bet KO CD4 cells alone. T-bet KO mice respond to H. felis infection with a markedly blunted IL-1β and TNF-α and elevated IL-10 levels. Activity of this one master regulator modulates the expression of the key gastric mucosal cytokines associated with gastric cancer and may be a target for therapy to restore immune balance clinically in patients at risk for gastric cancer.
Helicobacter infection is the primary risk factor for gastric cancer, with the cytokine environment within the gastric mucosa the strongest predictor of disease risk. Elevated TNF-alpha, IL-1beta, and low IL-10 are associated with the highest risk. In this study, we used C57BL/6 mice to identify T-bet as a central regulator of the cytokine environment during Helicobacter felis infection. We infected male and female C57BL/6 and C57BL/6-T-bet knockout (KO) litter mates with H. felis and examined the bacterial colonization, immune response, and mucosal damage at varying time points. T-bet KO mice maintained infection for 15 mo at similar levels to wild-type mice. Infection and immune response did not differ between male and female mice. Despite sustained infection, T-bet KO mice respond with a blunted Th1 response associated with preservation of parietal and chief cells and protection from the development of gastric cancer. Unexpectedly, T-bet KO mice develop a gastric environment that would not be expected based on the phenotype of T-bet KO CD4 cells alone. T-bet KO mice respond to H. felis infection with a markedly blunted IL-1beta and TNF-alpha and elevated IL-10 levels. Activity of this one master regulator modulates the expression of the key gastric mucosal cytokines associated with gastric cancer and may be a target for therapy to restore immune balance clinically in patients at risk for gastric cancer.
Author Kurt-Jones, Evelyn
Liu, Jian Hua
Stoicov, Calin
Houghton, JeanMarie
Bowen, Glennice
Whary, Mark
Fan, Xueli
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Snippet Helicobacter infection is the primary risk factor for gastric cancer, with the cytokine environment within the gastric mucosa the strongest predictor of...
Abstract Helicobacter infection is the primary risk factor for gastric cancer, with the cytokine environment within the gastric mucosa the strongest predictor...
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SubjectTerms Adenocarcinoma - immunology
Adenocarcinoma - microbiology
Adenocarcinoma - prevention & control
Animals
Female
Gastric Mucosa - immunology
Gastric Mucosa - microbiology
Gastric Mucosa - pathology
Genetic Predisposition to Disease
Helicobacter felis - immunology
Helicobacter Infections - immunology
Helicobacter Infections - pathology
Helicobacter Infections - prevention & control
Interleukin-1beta - physiology
Male
Mice
Mice, Inbred C57BL
Mice, Knockout
Stomach Neoplasms - immunology
Stomach Neoplasms - microbiology
Stomach Neoplasms - prevention & control
T-Box Domain Proteins - deficiency
T-Box Domain Proteins - genetics
T-Box Domain Proteins - physiology
Tumor Necrosis Factor-alpha - physiology
Title T-bet Knockout Prevents Helicobacter felis-Induced Gastric Cancer
URI http://www.jimmunol.org/cgi/content/abstract/183/1/642
https://www.ncbi.nlm.nih.gov/pubmed/19535625
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