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Is there immune surveillance against chronic myeloid leukaemia? Possibly, but not much

2017; Elsevier BV; Volume: 57; Linguagem: Inglês

10.1016/j.leukres.2017.03.003

1873-5835

Robert Peter Gale, Gerhard Opelz,

Acute Lymphoblastic Leukemia research

The association between cytomegalovirus (CMV) reactivation and relapse risk has not been evaluated in relation to T cell depletion strategies. We evaluated 93 patients who underwent allogeneic hematopoietic stem cell transplantation (HSCT) and analyzed the association between T cell depletion strategies with the cumulative incidence of relapse and CMV reactivation. A total of 33% of patients who received ATG vs. 34% who received alemtuzumab developed CMV reactivation. The cumulative incidence of relapse was 3% at 1 year and 20% at 3 years in patients with CMV reactivation vs. 30% at 1 year and 38% at 3 years in patients without CMV reactivation (p = 0.02). When analyzed separately, this effect persisted in the myeloid, but not the lymphoid group. There was a numerical trend towards increased non-relapse mortality (NRM) in patients with CMV reactivation, especially in the myeloid group. The choice of T cell depleting agent and the rate of CMV reactivation were not associated with different overall survival (OS) rates. These results suggest that the choice of T cell depletion strategy may have similar effects on rates of CMV reactivation, disease relapse, and survival. Further studies examining these variables in patients not exposed to in-vivo T cell depleting agents may be of interest.