Mixed T cell lineage chimerism in acute leukemia/MDS using pre-emptive donor lymphocyte infusion strategy—Is it prognostic?—a single-center retrospective study

Autor: Vipul Sheth, Victoria Potter, Hugues de Lavallade, Shreyans Gandhi, Austin Kulasekararaj, Pramila Krishnamurthy, Varun Mehra, Francesco Dazzi, Ghulam Mufti, Antonio Pagliuca, Donal Mclornan, Kavita Raj
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Blood Cancer Journal, Vol 11, Iss 7, Pp 1-6 (2021)
Druh dokumentu: article
ISSN: 2044-5385
DOI: 10.1038/s41408-021-00519-y
Popis: Abstract Pre-emptive DLI (pDLI) is an effective strategy in lowering the risk of relapse without significantly increasing the risk of graft-versus-host disease (GVHD) in the case of T cell lineage mixed chimerism (MC) post allogeneic transplant in hematological malignancies. Many patients, however, fail to receive timely pDLI and have dismal outcomes, which are not taken into consideration. We compared long-term outcomes of 106 patients having T cell MC after day 60 and undergoing allogeneic stem cell allograft for acute leukemia from an unrelated donor (UD), with 111 patients having complete chimerism (CC). Fifty-three (56%) patients received prophylactic pDLI. Thirty-six patients (67%) had a response (RR), 17 (33%) had no response (NR), and fifty-two (54%) did not receive any pDLI (ND). OS was better in MC group as compared to CC (54% vs 43%, p = 0.04), mainly due to reduction in NRM (14% vs 25%, p = 0.05), and all grade acute and chronic GVHD. Within the MC group, response to pDLI was the only significant factor predicting OS, DFS, and relapses with NR and ND having unfavorable outcomes as compared to RR (p = 0.001). T cell MC in patients undergoing UD allografts with alemtuzumab is no longer an adverse prognostic factor, as compared to patients having CC, after timely implementation of pDLI.
Databáze: Directory of Open Access Journals