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DSAs are unavoidable for some patients who have no alternative donor. Effective interventions to reduce DSAs are still needed, and the cost of the current therapies is relatively high. In this study, we retrospectively analyzed the data of 11 DSA-positive patients who received haplo-HSCT at our center and evaluated the therapeutic efficacy of the combination of intravenous immunoglobulin (IVIG), dexamethasone and high dose of transfused mononuclear cells (MNCs) for DSA desensitization. The kinetics of DSAs at different times and the engraftment and transplantation outcomes were also observed. We found that all patients had successful donor-cell engraftment and that no patient developed poor graft function. The median engraftment times of neutrophils and platelets were 14 days (range, 11\u201324 days) and 13 days (range, 11\u2013123 days), respectively. The DSA levels of all patients became negative or dropped under 2000 within 22 days after HSCT. A total of 36.4% of patients developed grade II\u2013IV acute graft-versus-host disease (aGVHD), and 9.1% of patients died of severe gastrointestinal aGVHD. Of the 7 surviving patients, four were diagnosed with chronic GVHD. After a median follow-up of 28.9 months (2.0\u201352.1 months), four patients died: of relapse (two), aGVHD (one), and multiple-organ failure (one). The 2-year OS, DFS, and NRM were 63.6%, 45.4%, and 18.2%, respectively. Combination therapy with IVIG, dexamethasone, and a high dose of MNCs transfusion, a simple and efficient procedure, was safe and effective for DSA desensitization and peripheral blood stem cell (PBSC) engraftment.<\/jats:p>","DOI":"10.1177\/09636897241303292","type":"journal-article","created":{"date-parts":[[2025,1,29]],"date-time":"2025-01-29T13:46:35Z","timestamp":1738158395000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["The Combination of Intravenous Immunoglobulin, Dexamethasone, and a High Dose of Mononuclear Cells Transfusion: An Effective Strategy for Decreasing Donor-Specific Antibodies During Haploidentical Hematopoietic Stem Cell Transplantation"],"prefix":"10.1177","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9215-9611","authenticated-orcid":false,"given":"Xiaoping","family":"Li","sequence":"first","affiliation":[{"name":"Department of Hematology, 920th Hospital of Joint Logistics Support Force, Kunming, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yu","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Hematology, 920th Hospital of Joint Logistics Support Force, Kunming, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dingsong","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Hematology, 920th Hospital of Joint Logistics Support Force, Kunming, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaozhuang","family":"Hu","sequence":"additional","affiliation":[{"name":"Shanghai Tissuebank Biotechnology Co., Ltd, Shanghai, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lin","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Hematology, 920th Hospital of Joint Logistics Support Force, Kunming, 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China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sanbin","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Hematology, 920th Hospital of Joint Logistics Support Force, Kunming, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2025,1,28]]},"reference":[{"key":"bibr1-09636897241303292","doi-asserted-by":"publisher","DOI":"10.1182\/blood.V74.5.1477.1477"},{"key":"bibr2-09636897241303292","doi-asserted-by":"publisher","DOI":"10.1182\/blood-2014-03-563130"},{"key":"bibr3-09636897241303292","doi-asserted-by":"publisher","DOI":"10.1097\/TP.0b013e3181b9d710"},{"key":"bibr4-09636897241303292","doi-asserted-by":"publisher","DOI":"10.3324\/haematol.2012.077685"},{"key":"bibr5-09636897241303292","doi-asserted-by":"publisher","DOI":"10.1038\/s41409-022-01578-w"},{"issue":"6","key":"bibr6-09636897241303292","volume":"62","author":"Morin-Papunen L","year":"1984","journal-title":"Med 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