Molecular characterization stratifies VQ myeloma cells into two clusters with distinct risk signatures and drug responses.

Molecular characterization stratifies VQ myeloma cells into two clusters with distinct risk signatures and drug responses.
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DOI:
10.1038/s41388-023-02684-9
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发表时间:
2023-05
期刊:
影响因子:
8
通讯作者:
Zhang, Jing
Zhang, Jing
中科院分区:
医学1区
文献类型:
--
作者:
Flietner, Evan;Yu, Mei;Poudel, Govinda;Veltri, Anthony J. J.;Zhou, Yun;Rajagopalan, Adhithi;Feng, Yubin;Lasho, Terra;Wen, Zhi;Sun, Yuqian;Patnaik, Mrinal M. M.;Callander, Natalie S. S.;Asimakopoulos, Fotis;Wang, Demin;Zhang, Jing

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多发性骨髓瘤 (MM) 是骨髓和髓外部位恶性浆细胞的癌症。我们之前描述了人类高风险 MM 的 VQ 模型。不同的 VQ 系表现出不同的疾病表型和存活率,表明模型内存在显着的差异。在这里,我们使用全外显子组测序和拷贝数变异(CNV)分析与RNA-Seq相结合,将VQ系分层到相应的簇中:A组细胞具有单体染色体(chr)5,并过表达与人类MM患者对硼替佐米(Btz)治疗敏感性相关的基因和通路。相比之下,B 组 VQ 细胞携带 chr3 反复扩增 (Amp),并表现出高风险 MM 特征,包括 Fam46c 下调、与功能性高风险 MM 相关的癌症生长途径上调,以及 Amp1q 和高风险 UAMS-70 和 EMC-92 基因特征的表达。与A组VQ细胞对Btz表现出短期反应形成鲜明对比的是,B组VQ细胞在体内对Btz从头产生耐药性。我们的研究强调 B 组 VQ 系高度代表具有超高风险的人类 MM 子集。
Multiple myeloma (MM) is a cancer of malignant plasma cells in the bone marrow and extramedullary sites. We previously characterized a VQ model for human high-risk MM. The various VQ lines display different disease phenotypes and survival rates, suggesting significant intra-model variation. Here, we use whole exome sequencing and copy number variation (CNV) analysis coupled with RNA-Seq to stratify the VQ lines into corresponding clusters: Group A cells had monosomy chromosome (chr) 5 and overexpressed genes and pathways associated with sensitivity to bortezomib (Btz) treatment in human MM patients. By contrast, Group B VQ cells carried recurrent amplification (Amp) of chr3 and displayed high-risk MM features, including downregulation of Fam46c, upregulation of cancer growth pathways associated with functional high-risk MM, and expression of Amp1q and high-risk UAMS-70 and EMC-92 gene signatures. Consistently, in sharp contrast to Group A VQ cells that showed short-term response to Btz, Group B VQ cells were de novo resistant to Btz in vivo. Our study highlights Group B VQ lines as highly representative of the human MM subset with ultrahigh risk.
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