NAT COMMUN:佘青柏/刘思德合作发现,精氨酸合成酶和MYC共同促进结直肠癌

2020-07-04 MedSci原创 MedSci原创

佘青柏/刘思德团队合作报导,多胺生物合成酶中的精胺合成酶(SMS)在CRC中过度表达。

已有的研究显示,多胺代谢失调与结直肠癌(CRC)的发展有关,但其基本机制尚未完全确定。

在此,佘青柏/刘思德团队合作报导,多胺生物合成酶中的精胺合成酶(SMS)在CRC中过度表达。靶向破坏CRC细胞中的SMS会导致精胺积累,从而抑制FOXO3a乙酰化,并允许其随后转移到细胞核,转录诱导促凋亡蛋白Bim的表达。

然而,这种诱导被MYC驱动的miR-19a和miR-19b的表达所钝化,它们抑制了Bim的产生。在SMS缺失的CRC细胞中,MYC活性的药物或基因抑制可显著诱导Bim的表达和细胞凋亡,并导致肿瘤的退行,但这些效应被Bim敲除所减弱。

这些发现揭示了CRC中一个关键的生存信号,通过SMS和MYC介导的不同的信号通路对Bim表达的趋同抑制。因此,联合抑制SMS和MYC信号传导可能是治疗CRC的有效方法。

 

 

原始出处:

Yubin Guo et al. Spermine synthase and MYC cooperate to maintain colorectal cancer cell survival by repressing Bim expression, Nature Communications (2020). 

 

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    2020-12-30 liuli5079
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    2020-10-14 liye789132251
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    2020-07-06 guihongzh
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    2020-07-04 ms9000000476168523

    这是事实还是

    0

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曲美替尼于2013年获FDA批准用于BRAF V600E或V600K突变的不可切除或转移性黑色素瘤。此外,曲美替尼也已获批用于非小细胞肺癌和甲状腺癌。曲美替尼是否也可用于治疗结直肠癌?

Nat Cancer:阻断TNF修正肠道微生物群,可减轻结直肠癌发展

肠道炎症和微生物群是结直肠癌(CRC)病因的两个重要组成部分。然而,目前,我们尚不清楚使用临床相关的抗炎治疗调整炎症是如何影响微生物群的,或者这是否可以影响CRC的结果。

盘点:结直肠癌近期重要原始研究汇总

【1】年轻人中结直肠癌的发病率上升与肥胖患者手术切除的增加相关

Nat Commu:结直肠癌近端淋巴结转移,由近到远?

Nature Communications发表了北京大学生物医学前沿创新中心(BIOPIC)、生命科学学院白凡课题组的研究论文:Mapping the spreading routes of lymp

Nature Cancer:结直肠癌的发病与肠道微生物密不可分

到目前为止,结直肠癌的具体病因还尚未明确。临床医生们普遍认为结直肠癌是由环境、饮食习惯、遗传等多种因素协同作用的结果。但最近比利时的研究人员有了新发现,证明了结直肠癌的发病与肠道上皮细胞中的一种Zeb