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轴介导的炎症相关糖酵解代谢改变与结直肠癌发生有关。

Axis-Mediated Metabolism Alternations of Inflammation-Related Glycolysis Involve with Colorectal Carcinogenesis.

机构信息

1 Department of Basic Medicine, Shaanxi University of Chinese Medicine, Xian yang, People's Republic of China.

2 Second Clinical Medical College, Shaanxi University of Chinese Medicine, Xian yang, People's Republic of China.

出版信息

Rejuvenation Res. 2019 Apr;22(2):138-145. doi: 10.1089/rej.2018.2089. Epub 2018 Sep 4.

Abstract

Chronic inflammation is a major driving factor for the development of colitis-associated cancer (CAC). It is extensively acknowledged that patients who have long-standing inflammation bowel disease are at high risk for developing CAC. However, the metabolic alteration by which chronic intestinal inflammation promotes colorectal cancer is unclear. In the present study, we constructed dextran sulfate sodium (DSS)-induced colitis mouse model to uncover possible alterations in the metabolism indexes. Interestingly, after DSS diet administration, the expression of metabolism indexes and c-Myc increased. Moreover, , we treated cells with IL-6 to simulate inflammatory microenvironment and found that glucose uptake, lactate production, and lactate dehydrogenase activity increased dramatically, mirroring what were observed . In addition, the associative inhibition of STAT3 and c-Myc could significantly block the expression of metabolic enzymes. With the inhibition of signaling, meanwhile, the upregulation of both cell glucose uptake and lactate production by IL-6 pretreatment was reduced simultaneously. Thus, our study indicates that inflammation could induce metabolic disorder by promoting signaling and activity. Collectively, we find that metabolic disruptions triggered by inflammatory signaling are associated with tumorigenesis via the axis.

摘要

慢性炎症是结肠炎相关癌症(CAC)发展的主要驱动因素。广泛认为,患有长期炎症性肠病的患者发生 CAC 的风险很高。然而,慢性肠道炎症促进结直肠癌的代谢改变尚不清楚。在本研究中,我们构建了葡聚糖硫酸钠(DSS)诱导的结肠炎小鼠模型,以揭示代谢指标可能发生的变化。有趣的是,在 DSS 饮食给药后,代谢指标和 c-Myc 的表达增加。此外,我们用 IL-6 处理细胞模拟炎症微环境,发现葡萄糖摄取、乳酸生成和乳酸脱氢酶活性显著增加,与观察到的一致。此外,STAT3 和 c-Myc 的联合抑制可显著阻断代谢酶的表达。同时,抑制信号通路可同时降低 IL-6 预处理引起的细胞葡萄糖摄取和乳酸生成的上调。因此,我们的研究表明,炎症可通过促进信号通路和活性诱导代谢紊乱。综上所述,我们发现炎症信号引发的代谢紊乱与通过轴导致的肿瘤发生有关。

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