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dc.contributor.authorMármol-Sánchez, Emilio
dc.contributor.authorFromm, Bastian
dc.contributor.authorOskolkov, Nikolay
dc.contributor.authorPochon, Zoé
dc.contributor.authorKalogeropoulos, Panagiotis
dc.contributor.authorEriksson, Eli
dc.contributor.authorBiryukova, Inna
dc.contributor.authorSekar, Vaishnovi
dc.contributor.authorErsmark, Erik
dc.contributor.authorAndersson, Björn
dc.contributor.authorDalén, Love
dc.contributor.authorFriedländer, Marc R.
dc.description.abstractPaleogenomics continues to yield valuable insights into the evolution, population dynamics, and ecology of our ancestors and other extinct species. However, DNA sequencing cannot reveal tissue-specific gene expression, cellular identity, or gene regulation, which are only attainable at the transcriptional level. Pioneering studies have shown that useful RNA can be extracted from ancient specimens preserved in permafrost and historical skins from extant canids, but no attempts have been made so far on extinct species. We extract, sequence, and analyze historical RNA from muscle and skin tissue of a ∼130-year-old Tasmanian tiger (Thylacinus cynocephalus) preserved in desiccation at room temperature in a museum collection. The transcriptional profiles closely resemble those of extant species, revealing specific anatomical features such as slow muscle fibers or blood infiltration. Metatranscriptomic analysis, RNA damage, tissue-specific RNA profiles, and expression hotspots genome-wide further confirm the thylacine origin of the sequences. RNA sequences are used to improve proteincoding and noncoding annotations, evidencing missing exonic loci and the location of ribosomal RNA genes while increasing the number of annotated thylacine microRNAs from 62 to 325. We discover a thylacine-specific microRNA isoform that could not have been confirmed without RNA evidence. Finally, we detect traces of RNA viruses, suggesting the possibility of profiling viral evolution. Our results represent the first successful attempt to obtain transcriptional profiles from an extinct animal species, providing thought-to-be-lost information on gene expression dynamics. These findings hold promising implications for the study of RNA molecules across the vast collections of natural history museums and from well-preserved permafrost remains.en_US
dc.identifier.citationMármol-Sánchez, Fromm, Oskolkov, Pochon, Kalogeropoulos, Eriksson, Biryukova, Sekar, Ersmark, Andersson, Dalén, Friedländer. Historical RNA expression profiles from the extinct Tasmanian tiger. Genome Research. 2023;33(8):1299-1316en_US
dc.identifier.cristinIDFRIDAID 2193295
dc.publisherCold Spring Harbor Laboratory Pressen_US
dc.relation.journalGenome Research
dc.rights.holderCopyright 2023 The Author(s)en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleHistorical RNA expression profiles from the extinct Tasmanian tigeren_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US

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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)