Journal
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
Volume 6, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fcimb.2016.00121
Keywords
Helicobacter pylori; persistent infection; children; SLC5A8; cancer suppressor gene; qPCR detection
Categories
Funding
- Fondo Nacional de Desarrollo Cientifico y Tecnologico [1061079, 1100514, 1130387, 11140232]
- Comision Nacional de Investigacion Cientifica y Tecnologica [21140520]
- Fondo de Financiamiento de Centros de Investigation en Areas Prioritarias [15130011]
- Secretarial de Educacion Superior, Ciencia, Tecnologia e Innovacion
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Background: Helicobacter pylori infects half of the world's population and causes gastric cancer in a subset of infected adults. Previous blood microarray findings showed that apparently healthy children, persistently infected with H. pylori have differential gene expression compared to age-matched, non-infected children. SLC5A8, a cancer suppressor gene with decreased expression among infected children, was chosen for further study based on bioinformatics analysis. Methods: A pilot study was conducted using specific qRT-PCR amplification of SLC5A8 in blood samples from H. pylori infected and non-infected children, followed by a larger, blinded, case-control study. We then analyzed gastric tissue from H. pylori infected and non-infected children undergoing endoscopy for clinical purposes. Results: Demographics, clinical findings, and family history were similar between groups. SLC5A8 expression was decreased in infected vs. non infected children in blood, 0.12 (IQR: 0-0.89) vs. 1.86 (IQR: 0-8.94, P = 0.002), and in gastric tissue, 0.08 (IQR: 0.04-0.15) vs. 1.88 (IQR: 0.55-2.56; P = 0.001). Children who were both stool positive and seropositive for H. pylori had the lowest SLC5A8 expression levels. Conclusions: H. pylori infection is associated with suppression of SCL5A8, a cancer suppressor gene, in both blood and tissue samples from young children.
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