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Disruption of the Tff1 gene in mice using CRISPR/Cas9 promotes body weight reduction and gastric tumorigenesis

 Hyejeong Kim  ;  Haengdueng Jeong  ;  Yejin Cho  ;  Jaehoon Lee  ;  Ki Taek Nam  ;  Han-Woong Lee 
 Laboratory Animal Research, Vol.34(4) : 257-263, 2018 
Journal Title
 Laboratory Animal Research 
Issue Date
CRISPR/Cas9 ; Tff1 ; Tff1-knockout mouse ; gastric cancer
Trefoil factor 1 (TFF1, also known as pS2) is strongly expressed in the gastrointestinal mucosa and plays a critical role in the differentiation of gastric glands. Since approximately 50% of all human gastric cancers are associated with decreased TFF1 expression, it is considered a tumor suppressor gene. TFF1 deficiency in mice results in histological changes in the antral and pyloric gastric mucosa, with severe hyperplasia and dysplasia of epithelial cells, resulting in the development of antropyloric adenoma. Here, we generated TFF1-knockout (KO) mice, without a neomycin resistant (NeoR) cassette, using the clustered regularly interspaced short palindromic repeats/CRISPR-associated nuclease 9 (CRSIPR/Cas9) system. Though our TFF1-KO mice showed phenotypes very similar to the previous embryonic stem (ES)-cell-based KO mice, they differed from the previous reports in that a reduction in body weight was observed in males. These results demonstrate that these newly established TFF1-KO mice are useful tools for investigating genetic and environmental factors influencing gastric cancer, without the effects of artificial gene insertion. Furthermore, these findings suggest a novel hypothesis that TFF1 expression influences gender differences.
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1. College of Medicine (의과대학) > BioMedical Science Institute (의생명과학부) > 1. Journal Papers
Yonsei Authors
Nam, Ki Taek(남기택)
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