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Wu X, Song M, Qiu P, Rakariyatham K, Li F, Gao Z, Cai X, Wang M, Xu F, Zheng J, Xiao H. Synergistic chemopreventive effects of nobiletin and atorvastatin on colon carcinogenesis. Carcinogenesis 2017; 38:455-464. [PMID: 28207072 PMCID: PMC6248647 DOI: 10.1093/carcin/bgx018] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 01/12/2017] [Accepted: 01/31/2017] [Indexed: 12/16/2022] Open
Abstract
Different cancer chemopreventive agents may act synergistically and their combination may produce enhanced protective effects against carcinogenesis than each individual agent alone. Herein, we investigated the chemopreventive effects of nobiletin (NBT, a citrus polymethoxyflavone) and atorvastatin (ATST, a lipid-lowering drug) in colon cancer cells/macrophages and an azoxymethane (AOM)-induced colon carcinogenesis rat model. The results demonstrated that co-treatments of NBT/ATST produced enhanced growth inhibitory and anti-inflammatory effects on the colon cancer cells and macrophages, respectively. Isobologram analysis confirmed that these interactions between NBT and ATST were synergistic. NBT/ATST co-treatment also synergistically induced extensive cell cycle arrest and apoptosis in colon cancer cells. Oral administration of NBT (0.1%, w/w in diet) or ATST (0.04%, w/w in diet) significantly decreased colonic tumor incidence and multiplicity in AOM-treated rats. Most importantly, co-treatment of NBT/ATST at their half doses (0.05% NBT + 0.02% ATST, w/w in diet) resulted in even stronger inhibitory effects on colonic tumor incidence and multiplicity than did NBT or ATST alone at higher doses. Statistical analysis confirmed that the enhanced chemopreventive activities against colon carcinogenesis in rats by the NBT/ATST combination were highly synergistic. Our results further demonstrated that NBT/ATST co-treatment profoundly modulated key cellular signaling regulators associated with inflammation, cell proliferation, cell cycle progression, apoptosis, angiogenesis and metastasis in the colon of AOM-treated rats. In conclusion, for the first time, our results demonstrated a strong synergy in inhibiting colon carcinogenesis produced by the co-treatment of NBT and ATST, which provided a scientific basis for using NBT in combination with ATST for colon cancer chemoprevention in humans.
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Affiliation(s)
- Xian Wu
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
| | - Mingyue Song
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
| | - Peiju Qiu
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
- School of Pharmacy, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China and
| | | | - Fang Li
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
| | - Zili Gao
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
| | - Xiaokun Cai
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
| | - Minqi Wang
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
| | - Fei Xu
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
| | - Jinkai Zheng
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100091, People's Republic of China
| | - Hang Xiao
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
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Blishchenko EY, Sazonova OV, Yatskin ON, Kalinina OA, Tolmazova AG, Philippova MM, Karelin AA, Ivanov VT. beta-Actin-derived peptides isolated from acidic extract of rat spleen suppress tumor cell growth. J Pept Sci 2008; 14:811-8. [PMID: 18219705 DOI: 10.1002/psc.1008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Twenty-two fragments of beta-actin and beta-actin-related protein were isolated from the acidic extracts of rat spleen tissue. beta-Actin fragments (75-90), (78-89), and (78-88), 0.01-1 microM, decreased live cell number of L929 murine tumor fibroblasts by 80-90%, with maximal cytotoxic effect of 30-40%. The fragments of (78-90) segment and the fragment of beta-actin-related protein (69-77) were less active (inhibitory effect up to 55%, cytotoxic-up to 25%).
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Affiliation(s)
- Elena Y Blishchenko
- Shemyakin-Ovchinnikov Institute of Bio-organic Chemistry, Russian Academy of Sciences, Moscow, V-437, GSP, Russia
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