Sci Rep:小龙虾约吗?科学家发现虾青素可抑制结直肠癌转移

2019-07-06 苏煜静 生物探索

夏日炎炎,又到了吃小龙虾的季节了。撇开路边摊地沟油等食品安全因素,龙虾富含较多的蛋白质和微量元素,最重要的是龙虾中的虾青素还能抑制结直肠癌的转移。但它如今已经是最为常见的恶性肿瘤之一。结直肠癌多发于中年以上人群,男女发病比例约为2:1。结直肠癌细胞转移往往是结直肠癌死亡的主要原因。

夏日炎炎,又到了吃小龙虾的季节了。撇开路边摊地沟油等食品安全因素,龙虾富含较多的蛋白质和微量元素,最重要的是龙虾中的虾青素还能抑制直肠癌的转移。

但它如今已经是最为常见的恶性肿瘤之一。直肠癌多发于中年以上人群,男女发病比例约为2:1。结直肠癌细胞转移往往是结直肠癌死亡的主要原因。

癌细胞转移是一个非常复杂的过程,但是对调节CRC转移过程的分子机制的研究很少。近日,韩国嘉泉大学的研究人员在《Scientific Reports》杂志上发表研究称,虾青素可作为一种新型结直肠癌细胞转移抑制剂。

虾青素(AXT)是一种类胡萝卜素,美国食品药品管理局和欧盟委员会批准AXT作为食品染料的颜色添加剂。它常见于虾、蟹、鱼类及植物中具有广泛的抗癌和抗衰老的效果。



虾青素抗癌细胞转移的分子机制

研究人员发现,虾青素能够负向调节致癌转录因子MYC表达。MYC是致癌转录因子,能够阻遏miR-29和miR-200家族基因miR-29a-3p和miR-200a的表达,而后者又分别是MMP2和ZEB1的抑制因子。MMP2和ZEB1的表达导致上皮-间质转化(EMT)从而诱导癌细胞转移。因此,MYC的减少能够恢复miR-29a-3p和miR-200a的表达,进而抑制MMP2和ZEB1相关的结直肠癌转移。

研究人员在进一步展开的动物实验中发现,虾青素在体内小鼠模型中能够有效抑制结肠癌细胞的转移活性。

不过可惜的是,小龙虾的虽然富含虾青素,但虾青素主要集中于龙虾的虾壳中,当然虾肉中也有少量的虾青素。除小龙虾外,各种海水虾和淡水虾的虾青素含量都比较高。希望小龙虾壳中的虾青素能够被更好利用,研发出抑制结直肠癌转移的有效药物。

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    2019-07-10 146573d0m20暂无昵称

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    2019-07-06 小微940490

    虾青素厉害

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    2019-07-06 龙胆草

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