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Sphingosine-1-Phosphate Links Persistent STAT3 Activation, Chronic Intestinal Inflammation, and Development of Colitis-Associated Cancer

机译:鞘氨醇-1-磷酸链接持久的STAT3激活,慢性肠道炎症和结肠炎相关的癌症的发展。

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摘要

Inflammatory bowel disease is an important risk factor for colorectal cancer. We show that sphingosine-1-phosphate (S1P) produced by upregulation of sphingosine kinase 1 (SphK1) links chronic intestinal inflammation to colitis-associated cancer (CAC) and both are exacerbated by deletion of Sphk2. S1P is essential for production of the multifunctional NF-κB-regulated cytokine IL-6, persistent activation of the transcription factor STAT3, and consequent upregulation of the S1P receptor, S1PR1. The prodrug FTY720 decreased SphK1 and S1PR1 expression and eliminated the NF-κB/IL-6/STAT3 amplification cascade and development of CAC, even in Sphk2-/- mice, and may be useful in treating colon cancer in individuals with ulcerative colitis. Thus, the SphK1/S1P/S1PR1 axis is at the nexus between NF-κB and STAT3 and connects chronic inflammation and CAC.
机译:炎症性肠病是结直肠癌的重要危险因素。我们显示鞘氨醇激酶1(SphK1)的上调产生的鞘氨醇-1-磷酸(S1P)链接慢性肠炎与结肠炎相关的癌症(CAC),并且都通过删除Sphk2加剧。 S1P对于多功能NF-κB调节的细胞因子IL-6的产生,转录因子STAT3的持续激活以及随后的S1P受体S1PR1的上调至关重要。前药FTY720降低了SphK1和S1PR1的表达,并消除了NF-κB/ IL-6 / STAT3扩增级联和CAC的形成,甚至在Sphk2-/-小鼠中也可能有用,可用于治疗溃疡性结肠炎患者的结肠癌。因此,SphK1 / S1P / S1PR1轴位于NF-κB和STAT3之间,并连接慢性炎症和CAC。

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