{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"institution":[{"name":"bioRxiv"}],"indexed":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T02:15:14Z","timestamp":1768529714154,"version":"3.49.0"},"posted":{"date-parts":[[2025,11,14]]},"group-title":"Cancer Biology","reference-count":57,"publisher":"openRxiv","license":[{"start":{"date-parts":[[2025,11,14]],"date-time":"2025-11-14T00:00:00Z","timestamp":1763078400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.biorxiv.org\/about\/FAQ#license"}],"funder":[{"DOI":"10.13039\/100016394","name":"Ludwig Center at Harvard","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100016394","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/100008552","name":"Brigham Research Institute","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100008552","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/100007427","name":"MPN Research Foundation","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100007427","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"accepted":{"date-parts":[[2025,11,14]]},"abstract":"<jats:title>SUMMARY<\/jats:title>\n                <jats:p>\n                  Hematopoietic stem cell transplantation (HSCT) offers the best curative option for acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS), yet relapse remains common. Current relapse detection methods are often too late for effective intervention. To identify earlier predictors and therapeutic targets, we performed longitudinal single-cell RNA and T cell receptor (TCR) sequencing of bone marrow from 33 AML\/MDS patients during post-transplant immune reconstitution, comparing those who relapsed to those who remained in remission. Persistence of recipient hematopoietic stem and progenitor cells (HSPCs) in the marrow was associated with relapse months later. These residual recipient HSPCs harbored copy number variations (CNVs), supporting their leukemic origin, and overexpressed\n                  <jats:italic>PRAME<\/jats:italic>\n                  and\n                  <jats:italic>CALCRL<\/jats:italic>\n                  compared to coexisting donor HSPCs. Further, in a subset of\n                  <jats:italic>TP53<\/jats:italic>\n                  -mutant disease, low TCR diversity with skewing toward dominant clonotypes foreshadowed relapse. These findings lay the groundwork for improved relapse prediction and nominate therapeutic targets for early post-transplant intervention.\n                <\/jats:p>","DOI":"10.1101\/2025.11.13.688350","type":"posted-content","created":{"date-parts":[[2025,11,15]],"date-time":"2025-11-15T01:00:14Z","timestamp":1763168414000},"source":"Crossref","is-referenced-by-count":0,"title":["Early persistence of recipient stem-cells and T-cell dysregulation are associated with relapse after transplant in AML\/MDS"],"prefix":"10.64898","author":[{"given":"Nurefsan E.","family":"Sariipek","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ksenia R.","family":"Safina","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wesley S.","family":"Lu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shuqiang","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"suffix":"III","given":"J. 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