Transl Oncol:BTYNB或是黑色素瘤和卵巢癌新的治疗靶点

2017-09-09 MedSci MedSci原创

癌胚胎mRNA结合蛋白IMP1或胰岛素样生长因子-2 mRNA结合蛋白2(IGF2BP1),可与c-Myc、β-TrCP1及其他致癌基因稳定结合,导致其靶mRNAs编码的蛋白表达增加。癌组织中IMP1经常过表达,且与预后不良密切相关,降低患者的生存率,如黑色素瘤、卵巢癌、乳腺癌、结肠癌和肺癌。虽然IMP1是一个很有吸引力的抗癌药物靶标,但是目前并没有IMP1小分子抑制剂。本研究中,研究人员采用荧光

癌胚胎mRNA结合蛋白IMP1或胰岛素样生长因子-2 mRNA结合蛋白2(IGF2BP1),可与c-Myc、β-TrCP1及其他致癌基因稳定结合,导致其靶mRNAs编码的蛋白表达增加。癌组织中IMP1经常过表达,且与预后不良密切相关,降低患者的生存率,如黑色素瘤、卵巢癌乳腺癌结肠癌肺癌。虽然IMP1是一个很有吸引力的抗癌药物靶标,但是目前并没有IMP1小分子抑制剂。

本研究中,研究人员采用荧光各向异性法筛选可抑制IMP1与荧光素标记的c-Myc mRNA结合的160000个小分子。最终确定小分子BTYNB是一个可有效且有选择性与c-Myc mRNA结合的IMP1抑制。在细胞中,BTYNB下调几种IMP1调节的mRNA。BTYNB破坏c-Myc mRNA的表达,导致c-Myc mRNA及蛋白表达水平的下调。


c-Myc mRNA下调β-TrCP1 mRNA的表达水平,并降低核转录因子κB(NF-κB)的水平。作为一种新的IMP1靶向mRNA,可使得BTYNB抑制肿瘤细胞蛋白质的合成。BTYNB可有效抑制含有IMP1的卵巢癌和黑色素瘤细胞的增殖而不会影响不含IMP1的细胞。IMP1过表达可逆转BTYNB对细胞增殖的作用。BTYNB可完全阻断黑色素瘤和卵巢癌细胞的不依赖支持物生长。


总之,该研究发现表明,BTYNB可靶向c-Myc,并可抑制黑色素瘤和卵巢癌细胞的增殖,作用方式独特,或是未来上述疾病治疗的新靶点,值得进一步研究。

原始出处:

Lily Mahapatra, Neal Andruska, et al., A Novel IMP1 Inhibitor, BTYNB, Targets c-Myc and Inhibits Melanoma and Ovarian Cancer Cell Proliferation. Transl Oncol. 2017 Oct; 10(5): 818–827. Published online 2017 Aug 29. doi: 10.1016/j.tranon.2017.07.008

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    2018-05-06 bsmagic9140
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    2018-03-13 minlingfeng
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    2017-10-11 sunylz
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