Autophagy:星形胶质细胞通过KISS1调节自噬促进乳腺癌转移到大脑的进展。

2017-10-10 fengxiangxin MedSci原创

转移灶的形成,是乳腺癌(BrCa)进展中的一个重要阶段。KISS1 的表达与转移进展受到抑制相关。最近,作者的研究表明,BrCa 转移到大脑时在mRNA和蛋白水平都只有低水平的KISS1表达。

转移灶的形成,是乳腺癌(BrCa)进展中的一个重要阶段。KISS1 的表达与转移进展受到抑制相关。最近,作者的研究表明,BrCa 转移到大脑时在mRNA和蛋白水平都只有低水平的KISS1表达。

通过多色免疫荧光和共培养技术,我们发现正常星形胶质细胞在大脑中能够通过分泌趋化因子CXCL12促进循环乳腺癌细胞种植于大脑从而促进转移形成。在本研究中发现CXCL12可通过诱导microRNA-345(mir345)下调KISS1在后转录水平的表达。

此外,作者的研究还表明,KISS1的异位表达可下调 ATG5 和 ATG7(调节细胞自噬的2个关键基因),并且和自噬抑制剂具有协同作用。从而暗示了自噬参与了KISS1调节BrCa转移的机制。作者还发现,KISS1在人类乳腺肿瘤标本中的表达与MMP9、IL8的表达呈负相关。从而支持了KISS1对BrCa在大脑中转移侵袭的调节作用。

KISS1通过腺病毒载体在内源基因沉默表达的MDA-MB-231Br细胞中异位过表达,能够恢复细胞的侵袭表型,这进一步支持了以上结论。

总之,研究结果强烈表明,成人星形胶质细胞可通过调节CXCL12-MIR345- KISS1 轴上调自噬信号通路而促进脑局部循环乳腺癌细胞的侵袭性。

原始出处:

Kaverina N, Borovjagin AV.et al.Astrocytes promote progression of breast cancer metastases to the brain via a KISS1-mediated autophagy.Autophagy. 2017 Oct 5:1-19. doi: 10.1080/15548627.2017.1360466.

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    2017-10-10 天涯183

    非常好的文章.学习了

    0

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    2017-10-10 1e0e5697m83(暂无匿称)

    henhao

    0

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循环RNA(circRNA RNA)是人类癌症发生及发展的关键调节因子,但其在乳腺癌肿瘤发生中的作用尚不清楚。本研究旨在研究circRNA对乳腺癌致癌作用的表达谱及其潜在的调控机制。使用人circRNA微阵列筛选乳腺癌组织中异常表达的circRNA。结果发现circBBB10在乳腺癌组织中明显上调。且扩大样本量进行筛查结果亦是如此。体外功能丧失实验显示,敲除circ-ABCB10可抑制乳腺癌细胞的

Radiology:雌激素受体阳性乳腺癌复发风险?定性放射基因学组来说道说道!

乳腺癌Breast Cancer是目前全球女性中发病最高的恶性肿瘤,是一种全身性疾病,乳腺位置及乳腺癌示意图在早期即可发生腋淋巴结转移,因此在治疗策略上早期发现并阻断其转移对乳腺癌的治疗及预后具有重大的临床意义。而浸润性乳腺癌是乳腺癌的主要类型严重危害着女性的身心健康。本研究旨在评价雌激素受体阳性乳腺癌患者乳腺影像学报告和数据系统(BI-RADS)乳腺X线摄影和磁共振(MR)成像特征与乳腺复发风险

Oncotarget:乳腺癌患者具有不同的乳腺微生物群

乳腺癌是在全球妇女中最常见的癌症,但是至今为止,至少有一半的患病妇女没有已知的危险因素。只有一部分患者因为乳腺癌遗传倾向,或是暴露于已知的环境危险因素而患病。因此,我们还需要进一步确定其他的乳腺癌危险因素。