The effects of death and post-mortem cold ischemia on human tissue transcriptomes
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hdl:2117/115587
Tipus de documentArticle
Data publicació2018-02-13
Condicions d'accésAccés obert
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Reconeixement 3.0 Espanya
ProjecteRNA-MAPS - Uncovering and understanding RNA through Massively Parallel Sequencing (EC-FP7-294653)
ELIXIR-EXCELERATE - ELIXIR-EXCELERATE: Fast-track ELIXIR implementation and drive early user exploitation across the life-sciences. (EC-H2020-676559)
ELIXIR-EXCELERATE - ELIXIR-EXCELERATE: Fast-track ELIXIR implementation and drive early user exploitation across the life-sciences. (EC-H2020-676559)
Abstract
Post-mortem tissues samples are a key resource for investigating patterns of gene expression. However, the processes triggered by death and the post-mortem interval (PMI) can significantly alter physiologically normal RNA levels. We investigate the impact of PMI on gene expression using data from multiple tissues of post-mortem donors obtained from the GTEx project. We find that many genes change expression over relatively short PMIs in a tissue-specific manner, but this potentially confounding effect in a biological analysis can be minimized by taking into account appropriate covariates. By comparing ante- and post-mortem blood samples, we identify the cascade of transcriptional events triggered by death of the organism. These events do not appear to simply reflect stochastic variation resulting from mRNA degradation, but active and ongoing regulation of transcription. Finally, we develop a model to predict the time since death from the analysis of the transcriptome of a few readily accessible tissues.
CitacióFerreira, P., Muñoz, M., Reverter Comes, F. The effects of death and post-mortem cold ischemia on human tissue transcriptomes. "Nature communications", 13 Febrer 2018, vol. 9, p. 1-15.
ISSN2041-1723
Versió de l'editorhttps://www.nature.com/articles/s41467-017-02772-x
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