Abstract
Single-cell RNA sequencing studies have suggested that total mRNA content correlates with tumor phenotypes. Technical and analytical challenges, however, have so far impeded at-scale pan-cancer examination of total mRNA content. Here we present a method to quantify tumor-specific total mRNA expression (TmS) from bulk sequencing data, taking into account tumor transcript proportion, purity and ploidy, which are estimated through transcriptomic/genomic deconvolution. We estimate and validate TmS in 6,590 patient tumors across 15 cancer types, identifying significant inter-tumor variability. Across cancers, high TmS is associated with increased risk of disease progression and death. TmS is influenced by cancer-specific patterns of gene alteration and intra-tumor genetic heterogeneity as well as by pan-cancer trends in metabolic dysregulation. Taken together, our results indicate that measuring cell-type-specific total mRNA expression in tumor cells predicts tumor phenotypes and clinical outcomes.
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Citation
@article{cao2022estimation,
title={Estimation of tumor cell total mRNA expression in 15 cancer types predicts disease progression},
author={Cao, Shaolong and Wang, Jennifer R and Ji, Shuangxi and Yang, Peng and Dai, Yaoyi and Guo, Shuai and Montierth, Matthew D and Shen, John Paul and Zhao, Xiao and Chen, Jingxiao and others},
journal={Nature biotechnology},
volume={40},
number={11},
pages={1624--1633},
year={2022},
publisher={Nature Publishing Group US New York}
}