/ publications / [2] mRNA quality control

Elucidating the rules of nonsense mediated mRNA decay (NMD) using genomics:

Human genetic diseases differ in whether NMD typically aggravates or alleviates the phenotypic effects of nonsense variants // Failure to trigger NMD is a cause of ineffective gene inactivation by CRISPR–Cas9 gene editing // NMD strongly determines the efficacy of cancer immunotherapy, with only transcripts that escape NMD predicting a response

Matched exome and transcriptome data can systematically elucidate the rules of NMD targeting in human tumors, explaining ¾ of the variance in NMD efficiency. Applying our NMD model identifies signatures of positive and negative selection on nonsense mutations in human tumors, and provides a classification for tumor-suppressor genes.

Transcriptomic signatures for classifying cancer cell lines and tumors:

A joint analysis of genomes, transcriptomes and epigenomes matches human cancer cell lines to tumor (sub)types in TCGA // ~20% of the 614 examined cell lines were not a good match to the cancer type they were meant to represent // ~7% of cell lines are a close match a different cancer type, sometimes representing instances of metastatic skin cancer

Transcriptome analysis suggests that 12% and 8% of tumors and cancer cell lines phenocopy TP53 loss. We identified an additional TP53-loss phenocopying gene, USP28. Deletions in USP28 are associated with a TP53 functional impairment in 2.9-7.6% of breast, bladder, lung, liver and stomach tumors.

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