{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T16:17:27Z","timestamp":1785428247096,"version":"3.56.0"},"reference-count":120,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T00:00:00Z","timestamp":1782691200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100013209","name":"Hellenic Foundation for Research and Innovation","doi-asserted-by":"publisher","award":["7615"],"award-info":[{"award-number":["7615"]}],"id":[{"id":"10.13039\/501100013209","id-type":"DOI","asserted-by":"publisher"}]},{"award":["7615"],"award-info":[{"award-number":["7615"]}],"id":[{"id":"https:\/\/ror.org\/05v75r592","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biomolecules"],"abstract":"<jats:p>Desiccation, ionizing radiation, ultraviolet exposure, and oxidative stress impose severe physicochemical stress that threatens the integrity of both DNA and RNA. Water loss promotes molecular crowding, protein and membrane destabilization, and the accumulation of reactive oxygen species (ROS), while rehydration can intensify oxidative injury and expose lesions accumulated during metabolic suppression. As a result, stress-tolerant metazoans must do more than survive water loss: they must also protect, monitor, and restore nucleic-acid integrity. Here, we review how tardigrades, bdelloid rotifers, Artemia, nematodes, and selected insect species preserve genomic and transcriptomic integrity under extreme dehydration, oxidative stress, and radiation-related insults. We compare conserved defence systems, including antioxidant enzymes, trehalose, LEA proteins, heat shock proteins, and core DNA repair pathways. These pathways include base excision repair, nucleotide excision repair, homologous recombination, and non-homologous end joining. We then examine how these conserved mechanisms contrast with lineage-specific innovations, such as the tardigrade proteins Dsup, TDR1, and TRID1, as well as the unusual genome plasticity of bdelloid rotifers. We argue that stress biology of these organisms is best understood through a framework that distinguishes damage prevention during drying from repair and recovery during rehydration. In this framework, extremotolerant metazoans provide biologically informative models for understanding oxidative nucleic-acid damage, redox defence and the molecular logic underlying radioprotection and dry-state preservation.<\/jats:p>","DOI":"10.3390\/biom16070958","type":"journal-article","created":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T03:06:34Z","timestamp":1782875194000},"page":"958","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["DNA and RNA Damage, Protection, and Repair in Desiccation-Tolerant Metazoans"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7960-7598","authenticated-orcid":false,"given":"Maria","family":"Kamilari","sequence":"first","affiliation":[{"name":"Department of Plant Protection Patras, Institute of Industrial and Forage Crops, Hellenic Agricultural Organization \u201cDIMITRA\u201d, 26442 Patras, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5845-9047","authenticated-orcid":false,"given":"Nadja","family":"M\u00f8bjerg","sequence":"additional","affiliation":[{"name":"Department of Biology, August Krogh Building, University of Copenhagen, 2100 Copenhagen, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2480-8189","authenticated-orcid":false,"given":"Nikos T.","family":"Papadopoulos","sequence":"additional","affiliation":[{"name":"Department of Agriculture, Crop Production and Rural Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonios","family":"Augustinos","sequence":"additional","affiliation":[{"name":"Department of Plant Protection Patras, Institute of Industrial and Forage Crops, Hellenic Agricultural Organization \u201cDIMITRA\u201d, 26442 Patras, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,6,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"709","DOI":"10.1038\/362709a0","article-title":"Instability and decay of the primary structure of DNA","volume":"362","author":"Lindahl","year":"1993","journal-title":"Nature"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"43","DOI":"10.1146\/annurev.bi.65.070196.000355","article-title":"DNA Excision Repair","volume":"65","author":"Sancar","year":"1996","journal-title":"Annu. 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