Downregulation of LOX promotes castration-resistant prostate cancer progression via IGFBP3.

Downregulation of LOX promotes castration-resistant prostate cancer progression via IGFBP3.
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LOX 下调通过 IGFBP3 促进去势抵抗性前列腺癌进展

DOI:
10.7150/jca.61131
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发表时间:
2021
期刊:
影响因子:
3.9
通讯作者:
Shang Z
Shang Z
中科院分区:
医学3区
文献类型:
--
作者:
Chen X;Shao Y;Wei W;Shen H;Li Y;Chen Y;Ma Q;Li H;Yang Z;Niu Y;Shang Z

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赖氨酰氧化酶(LOX)在前列腺癌中的作用仍存在争议。研究表明LOX可能抑制前列腺癌(PCA)的进展,而其他研究表明LOX可能在前列腺癌中起到肿瘤激活剂的作用。在这里,我们报告了低LOX表达通过上调IGFBP3促进CRPC进展。我们发现,与去势敏感型前列腺癌(CSPC)相比,在更晚期和更具侵袭性的去势抵抗前列腺癌(CRPC)中LOX表达减少。我们证明LOX与IGFBP3呈负相关,可能直接与IGFBP3启动子结合,从而降低IGFBP3的表达。SiRNA抑制IGFBP3可抑制CRPC细胞的生长和迁移,提示IGFBP3在CRPC中起关键作用。在小鼠模型上的临床前研究表明,重新引入LOX可以抑制CRPC的进展。综上所述,我们确定了LOX在PCa中的一个新功能,并发现LOX下调通过IGFBP3促进进展,LOX的恢复可能是一种有前景的PCa治疗策略。
The role of lysyl oxidase (LOX) in prostate cancer remains controversial. Studies have shown that LOX may inhibit the progression of prostate cancer (PCa), whereas other studies demonstrate that LOX may act as a tumor activator in PCa. Here, we report that low LOX expression contributes to CRPC progression through upregulation of IGFBP3. We showed that LOX expression decreased in the more advanced and aggressive castration-resistant prostate cancer (CRPC), compared to castration-sensitive prostate cancer (CSPC). We demonstrated that LOX was negatively correlated with IGFBP3 and may directly bind to the promoter of IGFBP3 and thus decrease the expression of IGFBP3. Inhibition of IGFBP3 by siRNA suppressed the growth and migration of CRPC cells, suggesting a critical role for IGFBP3 in CRPC. The preclinical study in a mouse model suggested that introducing back LOX inhibited the progression of CRPC. In summary, we identified a new function of LOX in PCa and discovered that LOX downregulation contributed to progression via IGFBP3, and that the restoration of LOX may be a promising therapeutic strategy for PCa.
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