Characterization of BRCA1-deficient premalignant tissues and cancers identifies Plekha5 as a tumor metastasis suppressor.
Jianlin LiuRagini AdhavKai MiaoSek Man SuLihua MoUn In ChanXin ZhangJun XuJianjie LiXiaodong ShuJianming ZengXu ZhangXueying LyuLakhansing PardeshiKaeling TanHeng SunKoon Ho WongChu-Xia DengXiaoling XuPublished in: Nature communications (2020)
Single-cell whole-exome sequencing (scWES) is a powerful approach for deciphering intratumor heterogeneity and identifying cancer drivers. So far, however, simultaneous analysis of single nucleotide variants (SNVs) and copy number variations (CNVs) of a single cell has been challenging. By analyzing SNVs and CNVs simultaneously in bulk and single cells of premalignant tissues and tumors from mouse and human BRCA1-associated breast cancers, we discover an evolution process through which the tumors initiate from cells with SNVs affecting driver genes in the premalignant stage and malignantly progress later via CNVs acquired in chromosome regions with cancer driver genes. These events occur randomly and hit many putative cancer drivers besides p53 to generate unique genetic and pathological features for each tumor. Upon this, we finally identify a tumor metastasis suppressor Plekha5, whose deficiency promotes cancer metastasis to the liver and/or lung.
Keyphrases
- copy number
- papillary thyroid
- single cell
- genome wide
- squamous cell
- mitochondrial dna
- induced apoptosis
- gene expression
- cell cycle arrest
- dna methylation
- endothelial cells
- lymph node metastasis
- childhood cancer
- rna seq
- oxidative stress
- cell death
- young adults
- smoking cessation
- pi k akt
- replacement therapy
- transcription factor