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Updated: Dec 27, 2025

A Genetically Engineered Mouse Model of Sporadic Colorectal Cancer
Published on: July 6, 2017
NUDT7 Loss Promotes Kras CRC Development
Jinsoo Song1,2, Sujeong Park1, Jinjoo Oh1
1Department of Biological Sciences, College of Natural Sciences, Wonkwang University, Iksan, Chunbuk 54538, Korea.
Abstract:
Studies have suggested that dysregulation of peroxisomal lipid metabolism might play an important role in colorectal cancer (CRC) development. Here, we found that Kras-driven CRC tumors demonstrate dysfunctional peroxisomal b-oxidation and identified Nudt7 (peroxisomal coenzyme A diphosphatase NUDT7) as one of responsible peroxisomal genes. In Kras-driven CRC tumors, the expression level of Nudt7 was significantly decreased. Treatment of azoxymethane/dextran sulfate sodium (AOM/DSS) into Nudt7 knockout (Nudt7) mice significantly induced lipid accumulation and the expression levels of CRC-related genes whereas xenografting of Nudt7-overexpressed LS-174T cells into mice significantly reduced lipid accumulation and the expression levels of CRC-related genes. Ingenuity pathway analysis of microarray using the colon of Nudt7 and Nudt7 mice treated with AOM/DSS suggested Wnt signaling as one of activated signaling pathways in Nudt7 colons. Upregulated levels of β-catenin were observed in the colons of Kras and AOM/DSS-treated Nudt7 mice and downstream targets of β-catenin such as Myc, Ccdn1, and Nos2, were also significantly increased in the colon of Nudt7 mice. We observed an increased level of palmitic acid in the colon of Nudt7 mice and attachment of palmitic acid-conjugated chitosan patch into the colon of mice induced the expression levels of b-catenin and CRC-related genes. Overall, our data reveal a novel role for peroxisomal NUDT7 in Kras-driven CRC development.
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