Transcriptome signatures in Helicobacter pylori-infected mucosa identifies acidic mammalian chitinase loss as a corpus atrophy marker

BMC Medical Genomics

Samuel B Lundin¹  Jens Nielsen⁵  Sven Pettersson³  Henrik Sjövall⁴  Martin Lloyd Hibberd²  Shugui Wang³  Kuntal Worah¹  Kaisa Thorell¹  Intawat Nookaew⁵ 

[1] Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;Genome Institute of Singapore, Singapore, Singapore;Department of Microbiology and Tumor and Cell Biology, Karolinska Institute, Stockholm, Sweden;Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden

关键词: Acidic mammalian chitinase;    Integrated analysis;    Gastric cancer;    Corpus gastritis;   

Others  :  1091754
DOI  :  10.1186/1755-8794-6-41

 received in 2013-04-19, accepted in 2013-10-01,  发布年份 2013

【 摘 要 】

Background

The majority of gastric cancer cases are believed to be caused by chronic infection with the bacterium Helicobacter pylori, and atrophic corpus gastritis is a predisposing condition to gastric cancer development. We aimed to increase understanding of the molecular details of atrophy by performing a global transcriptome analysis of stomach tissue.

Methods

Biopsies from patients with different stages of H. pylori infection were taken from both the antrum and corpus mucosa and analyzed on microarrays. The stages included patients without current H. pylori infection, H. pylori-infected without corpus atrophy and patients with current or past H. pylori-infection with corpus-predominant atrophic gastritis.

Results

Using clustering and integrated analysis, we found firm evidence for antralization of the corpus mucosa of atrophy patients. This antralization harbored gain of gastrin expression, as well as loss of expression of corpus-related genes, such as genes associated with acid production, energy metabolism and blood clotting. The analyses provided detailed molecular evidence for simultaneous intestinal metaplasia (IM) and spasmolytic polypeptide expressing metaplasia (SPEM) in atrophic corpus tissue. Finally, acidic mammalian chitinase, a chitin-degrading enzyme produced by chief cells, was shown to be strongly down-regulated in corpus atrophy.

Conclusions

Transcriptome analysis revealed several gene groups which are related to development of corpus atrophy, some of which were increased also in H. pylori-infected non-atrophic patients. Furthermore, loss of acidic chitinase expression is a promising marker for corpus atrophy.

【 授权许可】

   
2013 Nookaew et al.; licensee BioMed Central Ltd.

【 图 表 】

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