PMID- 31703320 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200928 IS - 2077-0383 (Print) IS - 2077-0383 (Electronic) IS - 2077-0383 (Linking) VI - 8 IP - 11 DP - 2019 Nov 7 TI - NK Cell Reconstitution in Paediatric Leukemic Patients after T-Cell-Depleted HLA-Haploidentical Haematopoietic Stem Cell Transplantation Followed by the Reinfusion of iCasp9-Modified Donor T Cells. LID - 10.3390/jcm8111904 [doi] LID - 1904 AB - T-cell-depleted (TCD) human leukocyte antigen (HLA) haploidentical (haplo) hematopoietic stem cell transplantation (HSCT) (TCD-haplo-HSCT) has had a huge impact on the treatment of many haematological diseases. The adoptive transfer of a titrated number of T cells genetically modified with a gene suicide can improve immune reconstitution and represents an interesting strategy to enhance the success of haplo-HSCT. Natural killer (NK) cells are the first donor-derived lymphocyte population to reconstitute following transplantation, and play a pivotal role in mediating graft-versus-leukaemia (GvL). We recently described a CD56(low)CD16(low) NK cell subset that mediates both cytotoxic activity and cytokine production. Given the multifunctional properties of this subset, we studied its functional recovery in a cohort of children given alpha/betaT-cell-depleted haplo-HSCT followed by the infusion of a titrated number of iCasp-9-modified T cells (iCasp-9 HSCT). The data obtained indicate that multifunctional CD56(low)CD16(low) NK cell frequency is similar to that of healthy donors (HD) at all time points analysed, showing enrichment in the bone marrow (BM). Interestingly, with regard to functional acquisition, we identified two groups of patients, namely those whose NK cells did (responder) or did not (non responder) degranulate or produce cytokines. Moreover, in patients analysed for both functions, we observed that the acquisition of degranulation capacity was not associated with the ability to produce interferon-gamma (IFN-gamma Intriguingly, we found a higher BM and peripheral blood (PB) frequency of iCas9 donor T cells only in patients characterized by the ability of CD56(low)CD16(low) NK cells to degranulate. Collectively, these findings suggest that donor iCasp9-T lymphocytes do not have a significant influence on NK cell reconstitution, even if they may positively affect the acquisition of target-induced degranulation of CD56(low)CD16(low) NK cells in the T-cell-depleted haplo-HSC transplanted patients. FAU - Stabile, Helena AU - Stabile H AD - Department of Molecular Medicine, Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, 00161 Rome, Italy. FAU - Nisti, Paolo AU - Nisti P AD - Department of Molecular Medicine, Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, 00161 Rome, Italy. FAU - Fionda, Cinzia AU - Fionda C AD - Department of Molecular Medicine, Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, 00161 Rome, Italy. FAU - Pagliara, Daria AU - Pagliara D AD - Department of Pediatric Hematology/Oncology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale Pediatrico Bambino Gesu, 00165 Rome, Italy. FAU - Gaspari, Stefania AU - Gaspari S AD - Department of Pediatric Hematology/Oncology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale Pediatrico Bambino Gesu, 00165 Rome, Italy. FAU - Locatelli, Franco AU - Locatelli F AD - Department of Pediatric Hematology/Oncology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale Pediatrico Bambino Gesu, 00165 Rome, Italy. AD - Department of Pediatrics, Sapienza, University of Rome, 00161 Rome, Italy. FAU - Santoni, Angela AU - Santoni A AD - Department of Molecular Medicine, Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, 00161 Rome, Italy. FAU - Gismondi, Angela AU - Gismondi A AD - Department of Molecular Medicine, Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, 00161 Rome, Italy. LA - eng GR - code. 9962/Associazione Italiana per la Ricerca sul Cancro/ GR - code. 20174T7NXL_003/Ministero dell'Istruzione, dell'Universita e della Ricerca/ PT - Journal Article DEP - 20191107 PL - Switzerland TA - J Clin Med JT - Journal of clinical medicine JID - 101606588 PMC - PMC6912839 OTO - NOTNLM OT - Bone marrow transplantation OT - NK cell subsets OT - haematological disease OT - iCasp-9 HSCT COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could represent a potential conflict of interest. EDAT- 2019/11/11 06:00 MHDA- 2019/11/11 06:01 PMCR- 2019/11/07 CRDT- 2019/11/10 06:00 PHST- 2019/09/19 00:00 [received] PHST- 2019/10/29 00:00 [revised] PHST- 2019/11/05 00:00 [accepted] PHST- 2019/11/10 06:00 [entrez] PHST- 2019/11/11 06:00 [pubmed] PHST- 2019/11/11 06:01 [medline] PHST- 2019/11/07 00:00 [pmc-release] AID - jcm8111904 [pii] AID - jcm-08-01904 [pii] AID - 10.3390/jcm8111904 [doi] PST - epublish SO - J Clin Med. 2019 Nov 7;8(11):1904. doi: 10.3390/jcm8111904.