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
中科院分区:
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
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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