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Effect of N-Methyl-N-Nitrosourea on Helicobacter-induced Gastric Carcinogenesis in C57BL/6 Mice

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Author(s)
이주엽
Alternative Author(s)
Lee, Ju Yup
Issued Date
2016
Keyword
Helicobacter felisHelicobacter pyloriMethylnitrosoureaGastric neoplasm
Abstract
Background: The aim of this study was to investigate the effect of N-methyl-N-nitrosourea (MNU) treatment followed by chronic
Helicobacter pylori SS1 and H. felis colonization on the stomachs of C57BL/6 mice. The role of MNU and Helicobacter species in gastric
carcinogenesis was also elucidated.
Methods: A total of 69 C57BL/6 mice at 4 weeks of age were divided into 6 groups according to MNU treatment and H. pylori SS1
or H. felis infection. The mice were sacrificed at 21 and 50 weeks. The degree of inflammation was determined by histopathology.
The levels of gastric mucosal myeloperoxidase, TNF-, and interleukin-1 (IL-1) were measured by ELISA.
Results: In the H. felis groups with or without MNU, the incidence of gastric tumors was 21.1% and 35.0% at 21 and 50 weeks,
respectively. No gastric tumors were observed in all control mice. At 50 weeks, 37.5% of gastric adenoma cases were observed in the
H. felis alone and MNU + H. felis groups. Furthermore, 12.5% of gastric adenocarcinoma cases were observed in the MNU alone and
MNU + H. felis groups. The gastric mucosal IL-1 level was significantly higher in the MNU + H. felis group at 21 weeks and H.
felis group at 50 weeks, respectively, than that for control mice (P < 0.05). However, the effect of MNU on H. pylori SS1-induced
gastric carcinogenesis was low compared to that on H. felis.
Conclusions: Administration of MNU before H. felis infection provokes severe inflammation through IL-1, and eventually induces gastric
cancer. However, the role of MNU in H. pylori SS1-induced gastric carcinogenesis model is minor.
Department
Dept. of Internal Medicine (내과학)
Publisher
School of Medicine
Citation
Journal of Cancer Prevention, Vol.21(3) : 182-186, 2016
Type
Article
ISSN
2288-3649
DOI
10.15430/JCP.2016.21.3.182
URI
http://kumel.medlib.dsmc.or.kr/handle/2015.oak/32623
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Internal Medicine (내과학)
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