Tumor necrosis factor-α knockout mitigates intestinal inflammation and tumorigenesis in obese Apc1638N mice

被引:2
|
作者
Li, Jinchao [1 ]
Tang, Ying [1 ]
Lin, Ting-Chun [1 ]
Zeng, Huawei [2 ]
Mason, Joel B. [3 ]
Liu, Zhenhua [1 ,4 ,5 ,6 ]
机构
[1] Univ Massachusetts, Sch Publ Hlth & Hlth Sci, Nutr & Canc Prevent Lab, Amherst, MA 01003 USA
[2] ARS, Grand Forks Human Nutr Res Ctr, USDA, Grand Forks, ND USA
[3] Tufts Univ, Jean Mayer USDA Human Nutr Res Ctr Aging, Vitamins & Carcinogenesis Lab, Boston, MA USA
[4] Univ Massachusetts, UMass Canc Ctr, Chan Med Sch, Worcester, MA USA
[5] Univ Massachusetts, Sch Publ Hlth & Hlth Sci, 100 Holdsworth Way, Amherst, MA 01003 USA
[6] Tongji Univ, Shanghai Yangzhi Rehabil Hosp, Dept Clin Nutr, Sch Med, Shanghai 201619, Peoples R China
来源
JOURNAL OF NUTRITIONAL BIOCHEMISTRY | 2023年 / 117卷
关键词
Colorectal Cancer; Inflammation; Obesity; Tumor Necrosis Factor-alpha; Wnt pathway; NF-KAPPA-B; TNF-ALPHA; SIGNALING PATHWAYS; COLORECTAL-CANCER; LINKING OBESITY; ADIPOSE-TISSUE; CYTOKINES; RISK; PURIFICATION; METAANALYSIS;
D O I
10.1016/j.jnutbio.2023.109355
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Strong evidence from observational studies shows that having body fatness is associated with an individual's risk of developing colorectal cancer (CRC), but the causality between obesity and CRC remains inadequately elucidated. Our previous studies have shown diet-induced obesity is associated with elevated TNF-alpha and enhanced activation of Wnt-signaling, yet the causal role of TNF-alpha on intestinal tumorigenesis has not been precisely studied. The present study aims to examine the functionality of TNF-alpha in the development of CRC associated with obesity. We first examined the extent to which diet-induced obesity elevates intestinal tumorigenesis by comparing Apc(1638N) mice fed a low fat diet (LFD, 10 kcal% fat) with those fed a high fat diet (HFD, 60 kcal% fat), and then investigated the degree that the genetic ablation of TNF-alpha attenuates the effect by crossing the TNF-alpha(-/-) mice with Apc(1638N) mice and feeding them with the same HFD (TNF-alpha KO HFD). After 16-weeks of feeding, the HFD significantly increased intestinal tumorigenesis, whereas the deletion of TNF-alpha attenuated the effect (P < .05). Accompanying the changes in macroscopic tumorigenesis, HFD significantly elevated intestinal inflammation and procarcinogenic Wnt-signaling, whereas abolishment of TNF-alpha mitigated the magnitude of these elevations (P < .05). In summary, our findings demonstrate that the knockout of TNF-alpha attenuates obesity-associated intestinal tumorigenesis by decreasing intestinal inflammation and thereby the Wnt-signaling, indicating that TNF-alpha signaling is a potential target that can be utilized to reduce the risk of CRC associated with obesity. (c) 2023 Elsevier Inc. All rights reserved.
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页数:9
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