RRC ID 82495
Author Zhang N, Liu C, Jin L, Zhang R, Wang T, Wang Q, Chen J, Yang F, Siebert HC, Zheng X.
Title Ketogenic Diet Elicits Antitumor Properties through Inducing Oxidative Stress, Inhibiting MMP-9 Expression, and Rebalancing M1/M2 Tumor-Associated Macrophage Phenotype in a Mouse Model of Colon Cancer.
Journal J Agric Food Chem
Abstract Many advanced cancers are characterized by metabolic disorders. A dietary therapeutic strategy was proposed to inhibit tumor growth through administration of low-carbohydrate, average-protein, and high-fat diet, which is also known as ketogenic diet (KD). In vivo antitumor efficacy of KD on transplanted CT26+ tumor cells in BALB/c mice was investigated. The results showed that the KD group had significantly higher blood β-hydroxybutyrate and lower blood glucose levels when compared with the normal diet group. Meanwhile, KD increased intratumor oxidative stress, and TUNEL staining showed KD-induced apoptosis against tumor cells. Interestingly, the distribution of CD16/32+ and iNOS+ M1 tumor-associated macrophages (TAMs) increased in the KD-treated group, with concomitantly less arginase-1+ M2 TAMs. Moreover, KD treatment downregulated the protein expression of matrix metalloproteinase-9 in CT26+ tumor-bearing mice. Western blot analysis demonstrated that the expression levels of HDAC3/PKM2/NF-κB 65/p-Stat3 proteins were reduced in the KD-treated group. Taken together, our results indicated that KD can prevent the progression of colon tumor via inducing intratumor oxidative stress, inhibiting the expression of the MMP-9, and enhancing M2 to M1 TAM polarization. A novel potential mechanism was identified that KD can prevent the progression of colon cancer by regulating the expression of HDAC3/PKM2/NF-κB65/p-Stat3 axis.
Volume 68(40)
Pages 11182-11196
Published 2020-10-7
DOI 10.1021/acs.jafc.0c04041
PMID 32786841
MeSH Animals Cell Line, Tumor Colonic Neoplasms / diet therapy* Colonic Neoplasms / genetics Colonic Neoplasms / immunology* Diet, Ketogenic* Disease Models, Animal Humans Male Matrix Metalloproteinase 9 / genetics Matrix Metalloproteinase 9 / immunology* Mice Mice, Inbred BALB C NF-kappa B / genetics NF-kappa B / immunology Oxidative Stress* STAT3 Transcription Factor / genetics STAT3 Transcription Factor / immunology Tumor-Associated Macrophages / immunology*
Resource
Human and Animal Cells Colon-26(RCB2657)