{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,20]],"date-time":"2026-07-20T10:18:02Z","timestamp":1784542682911,"version":"3.55.0"},"reference-count":51,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2025,3,18]],"date-time":"2025-03-18T00:00:00Z","timestamp":1742256000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,3,27]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Patients with hematologic diseases have experienced coronavirus disease 2019 (COVID-19) with a prolonged, progressive course. Here, we present clinical, pathological, and virological analyses of three cases of prolonged COVID-19 among patients undergoing treatment for B-cell lymphoma. These patients had all been treated with anti-CD20 antibody and bendamustine. Despite various antiviral treatments, high severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) levels persisted for &amp;gt;4 weeks, and two of them succumbed to COVID-19. The autopsy showed bronchopneumonia, interstitial pneumonia, alveolar hemorrhage, and fibrosis. Overlapping cytomegalovirus, fungal and\/or bacterial infections were also confirmed. Sequencing of SARS-CoV-2 showed accumulation of mutations and changes in variant allele frequencies over time. NSP12 mutations V792I and M794I appeared independently in two cases as COVID-19 progressed. In vitro drug susceptibility analysis and an animal experiment using recombinant SARS-CoV-2 demonstrated that each mutation, V792 and M794I, was independently responsible for remdesivir resistance and attenuated pathogenicity. E340A, E340D, and F342INS mutations in the spike protein were found in one case, which may account for the sotrovimab resistance. Analysis of autopsy specimens indicated heterogeneous distribution of these mutations. In summary, we demonstrated temporal and spatial diversity in SARS-CoV-2 that evolved resistance to various antiviral agents in malignant lymphoma patients under immunodeficient conditions caused by certain types of immunochemotherapies. Strategies may be necessary to prevent the acquisition of drug resistance and improve outcomes, such as the selection of appropriate treatment strategies for lymphoma considering patients\u2019 immune status and the institution of early intensive antiviral therapy.<\/jats:p>","DOI":"10.1093\/pnasnexus\/pgaf085","type":"journal-article","created":{"date-parts":[[2025,3,18]],"date-time":"2025-03-18T07:44:05Z","timestamp":1742283845000},"source":"Crossref","is-referenced-by-count":11,"title":["Clinical and molecular landscape of prolonged SARS-CoV-2 infection with resistance to remdesivir in immunocompromised patients"],"prefix":"10.1093","volume":"4","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1709-7588","authenticated-orcid":false,"given":"Chisako","family":"Iriyama","sequence":"first","affiliation":[{"name":"Department of Hematology, Fujita Health University School of Medicine , 1-98 Dengakugakubo, Kutsukake-cho, Toyoake 470-1192 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Research and Development (IVReD), Hokkaido University , Sapporo 001-0021 ,","place":["Japan"]},{"name":"One Health Research Center, Hokkaido University , Sapporo 060-0818 ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mutsumi","family":"Takahata","sequence":"additional","affiliation":[{"name":"Department of Hematology, Sapporo-Kosei General Hospital , Sapporo 060-0033 ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takashi","family":"Ishio","sequence":"additional","affiliation":[{"name":"Department of Hematology, Sapporo-Kosei General Hospital , Sapporo 060-0033 ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Makoto","family":"Ibata","sequence":"additional","affiliation":[{"name":"Department of Hematology, Sapporo-Kosei General Hospital , Sapporo 060-0033 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