Br J Cancer:ITGA6表达下调增强多发性骨髓瘤的侵袭作用并促进其发展为浆细胞白血病

2021-04-02 xiaozeng MedSci原创

多发性骨髓瘤(MM)是一种以骨髓为基础的恶性肿瘤,其特征在于克隆性浆细胞的增殖。

多发性骨髓瘤(MM)是一种以骨髓为基础的恶性肿瘤,其特征在于克隆性浆细胞的增殖。在MM的发展过程中,癌细胞具有在骨髓以外部位增殖的能力,表现为浆细胞白血病。

根据来源,浆细胞白血病可分为两种类型:一种是新诊断的原发性浆细胞白血病(pPCL),而另一种则是复发性MM中出现的继发性浆细胞白血病(sPCL)。

sPCL是MM的一种侵袭性形式,但MM发展成为PCL的相关机制目前仍不清楚。


该研究通过分析MM患者和PCL患者的基因表达谱,鉴定两种疾病之间的分子差异。通过Cox生存曲线和Kaplan-Meier分析,评估ITGA6(整合素亚基α6)对MM患者预后的影响。而侵袭测定可用于评估ITGA6是否调节了MM向PCL发展。

ITGA6或调控MM向PCL发展

结果显示,基因表达谱分析表明,在PCL患者中细胞转移通路被富集,且在PCL和MM患者中发现ITGA6的差异表达。研究人员发现,ITGA6的表达水平是MM患者无事件生存期(EFS)和总体生存期(OS)的一个独立预后因素。


MM当前的预后标志是国际分期系统(ISS),研究人员发现,当ITGA6表达时,MM的ISS分层能力得到了提高。功能研究显示,ITGA6的增加可以减少骨髓瘤细胞的侵袭作用。此外,ITGA6的低表达水平是由于其反义非编码RNA ITGA6-AS1的表观遗传学下调所引起的。

ITGA6介导MM细胞的侵袭作用

总而言之,该研究结果显示,在浆细胞恶性进展过程中,ITGA6的水平逐渐降低,而ITGA6的低表达有助于骨髓瘤的转移。此外,ITGA6的表达水平有助于分析MM患者的预后分层。


原始出处:

Song, S., Zhang, J., Su, Q. et al. Downregulation of ITGA6 confers to the invasion of multiple myeloma and promotes progression to plasma cell leukaemia. Br J Cancer (30 March 2021).

 

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    2021-10-24 jml2009
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    2021-04-03 MedSciZeng

    留言时带有#肿瘤科# 加入肿瘤科圈子,点击#肿瘤科#查看更多肿瘤科精华帖

    0

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Bristol Myers Squibb(BMS)和蓝鸟生物公司(Bluebird Bio)周五宣布,FDA已批准其靶向BCMA的CAR-T细胞疗法Abecma。

FDA批准PEPAXTO(美法仑氟苯甲酰胺)用于治疗复发难治多发性骨髓瘤

PEPAXTO是一款抗癌肽-药物偶联物(PDC),其靶向氨基肽酶并将烷基化剂迅速释放到肿瘤细胞中。

AACR 2021:抗CD47抗体AO-176治疗实体瘤和多发性骨髓瘤,临床前试验取得积极结果

生物技术公司Arch Oncology今天宣布,在美国癌症研究协会(AACR)年会上介绍了AO-176的最新临床前数据。