Применение инфузий T-клеток памяти с целью профилактики вирусных инфекций у пациентов с гемобластозами, перенесших аллогенную трансплантацию гемопоэтических стволовых клеток с деплецией альфа/бета-Т-лимфоцитов

Viral infections are frequent complications in the recipients of the HSCT with TCRαβ and CD19-graft depletion. Adoptive transfer of memory T cells may improve immune response to common pathogens. The work reflects the retrospective safety analysis of using the infusions of CD45RA-depleted donor lymphocytes. Data from 80 patients were analyzed. Up to 3 doses of donor lymphocytes were administered at monthly intervals, escalating to 100 × 103/kg in haploidentical transplants and 300 × 103/kg in MUD transplants. Median follow-up for alive patients was 18 (8–44) months. We did not observe any allergic reactions, septic complications after infusion of donor lymphocytes (DLI). The cumulative incidence of a de novo acute GVHD after DLI was 5% (95% CI: 2–13). In 64% patients (n = 51) was detected CMV in the blood. There were no cases of resistant CMV disease on the background of drug therapy. In patients who received DLI, 70% (n = 56) had documented appearance of virus-specific lymphocytes in peripheral blood (Elispot assay). Thus, the introduction of memory T cells at a dose of 25–100 × 103/kg body weight of the recipient for CD3+ in the case of HSCT from a haploidentical donor and 100–300 × 103/kg for an unrelated HSCT. Infusions of low dose memory T-lymphocytes after transplant engraftment are safe, potentially effective and constitute a simple measure to prevent infections in the setting of alpha/beta T-cell-depleted transplantation.