Cancer Stem Cells in Helicobacter Pylori Infection and Aging: Implications for Gastric Carcinogenesis

Overview

Journal World J Gastrointest Pathophysiol

Publisher Baishideng Publishing Group

Specialty Gastroenterology

Date 2014 Aug 19

PMID 25133037

Citations 23

Authors

Edi Levi

Paula Sochacki

Nabiha Khoury

Bhaumik B Patel

Adhip Pn Majumdar

Affiliations

Soon will be listed here.

Abstract

Aim: To demonstrated the combined effects of aging and carcinogen treatment on cancer stem/stem-like cells (CSCs) of gastric mucosa in an animal model.

Methods: In this study we investigated the effects of aging and Helicobacter pylori (H. pylori) inflammation as a model for inflammation induced carcinogenesis in human and rat gastric mucosa samples. In aging studies, we compared 4-mo old (young) with 22 mo (aged) old Fischer-344 rats. For human studies, gastric biopsies and resection specimens representing normal mucosa or different stages of H. pylori gastritis and gastric adenocarcinomas were used for determining the expression of stem cell markers CD166, ALDH1 and LGR5. In addition we performed immunofluorescent double labeling for B-catenin and Lgr5 in both rat and human gastric tissues to examine the status of Wnt signaling in these cells.

Results: CSC markers ALDH1, LGR5, and CD166 were expressed in very low levels in normal human gastric mucosa or young rat gastric mucosa. In contrast, level of expression for all three markers significantly increased in H. pylori gastritis and gastric adenocarcinomas as well as in normal gastric mucosa in aged rats. We also observed cytoplasmic B-catenin staining in both aged rat and human H. pylori inflamed gastric mucosa, which were found to be colocalized with Lgr5 immunoreactive cells. The increased number of ALDH1, CD166 and LGR5 positive cells in H. pylori gastritis indicates that increased number of stem-like cells in gastric mucosa is an early event, and may constitute an important step in the progression to neoplasia.

Conclusion: Our observation of the age-related increase in cancer stem/stem-like cells in the gastric mucosa may explain the increased incidence of gastric cancer during aging. Combination of aging and H. pylori infection may have additive effects in progression to neoplasia.

Citing Articles

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Shah D, Bentrem D Cancer Treat Res. 2024; 192:1-17.

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induces the expression of Lgr5 and stem cell properties in gastric target cells.

Nascakova Z, He J, Papa G, Francas B, Azizi F, Muller A Life Sci Alliance. 2024; 7(11).

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Factors associated with precancerous stomach lesions and progresion: A 7-year multi-center prospective cohort study on the low incidence of gastric cancer in central Saudi Arabia.

Zacharakis G, Dahale A, Elbary E, Babikir R, Alla M, Mustafa M Saudi J Gastroenterol. 2024; 30(6):389-398.

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Otaegi-Ugartemendia M, Matheu A, Carrasco-Garcia E Cancers (Basel). 2022; 14(6).

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