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Interleukin-13 and Its Signaling Pathway Is Associated With Obesity-Related Colorectal Tumorigenesis

Interleukin-13 and Its Signaling Pathway Is Associated With Obesity-Related Colorectal Tumorigenesis

Shimpei Matsui, Koji Okabayashi, Masashi Tsuruta, Kohei Shigeta, Ryo Seishima, Takashi Ishida, Takayuki Kondo, Yoshiyuki Suzuki, Hirotoshi Hasegawa, Masayuki Shimoda, Shinya Sugimoto, Toshiro Sato, Yuko Kitagawa

Cancer Sci. 2019 Jul;110(7):2156-2165.

PMID: 31099450

Abstract:

The incidence of colorectal cancer (CRC) has been on the rise, which is linked to the increasing prevalence of obesity, based on global epidemiological evidence. Although chronic inflammation is implicated in tumor development, the mechanisms underlying obesity-associated CRC remain unknown. Here, we sought to identify the inflammatory cytokines and their roles in obesity-related colorectal tumorigenesis using cytokine array analyses in a mouse model. Colorectal tumorigenesis was induced through i.p. injection of azoxymethane once a week for 6 weeks in 6-week-old female WT C57Black/6J mice and the obesity diabetes model mouse KK/TaJcl, KK-Ay/TaJcl. The formation of aberrant crypt foci and colorectal tumors were more frequent in obese mice compared with WT mice, and both serum interleukin (IL)-13 and IL-13 receptor (R) expression in the normal intestinal mucosal epithelium were significantly increased in the obese mice. Furthermore, addition of IL-13 to a human CRC cell line and a human colon organoid culture altered the phenotype of intestinal epithelial cells. Knockdown experiments further revealed that IL-13Rα1 dominantly induced mucosal proliferation. Collectively, These results suggest an association between anti-inflammatory cytokines and colorectal carcinogenesis, and provide new research directions for cancer prevention strategies. In particular, inflammation provoked by obesity, notably by increased expression of the cytokine IL-13, could play an important role in the carcinogenesis of obesity-related CRC.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
IAR42413347	Interleukin-13 from mouse			Price

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