NPM-ALK-reactive T-cell responses in children and adolescents with NPM-ALK positive anaplastic large cell lymphoma

Journal article


Publication Details

Author(s): Singh VK, Werner S, Schwalm S, Lennerz V, Ruf S, Stadler S, Hackstein H, Reiter A, Wölfel T, Damm-Welk C, Woessmann W
Journal: OncoImmunology
Publication year: 2019
ISSN: 2162-4011
eISSN: 2162-402X


Abstract

The oncoantigen nucleophosmin-anaplastic lymphoma kinase (NPM-ALK) induces cellular and humoral immune responses in patients with NPM-ALK-positive anaplastic large cell lymphoma (ALCL). We characterize the NPM-ALK-specific T-cell responses in a cohort of pediatric and adolescent ALCL-patients in remission without Human Leucocyte Antigen (HLA)-preselection. First, we assessed NPM-ALK-reactive T-cell responses and their HLA-class I restriction in patients by using dendritic cells (DCs) transfected with in vitro transcribed (IVT) NPM-ALK-RNA for CD8 (n = 20) or CD3 (n = 9) T-cell stimulation. NPM-ALK-specific T-cells were detected in twelve of 29 patients (nine of 20 with CD8-selected and three of nine with CD3-selected cells). Recognition of NPM-ALK was restricted by HLA-C alleles in six of eight, and by HLA-B alleles in four of eight analyzed patients. No NPM-ALK-reactivity was detected in 20 healthy individuals. Second, in order to define possible immunogenic NPM-ALK-epitope regions, DCs pulsed with pools of overlapping long NPM-ALK-peptides were used to stimulate T-cells in further 22 patients and ten controls. Responsive T-cells were detected in 15 patients and in five controls. A peptide pool located in the middle of the kinase domain induced ALK-reactive T-cells in 14 of 15 responsive patients. We could narrow to single peptides between p327-p370 of NPM-ALK in four patients. In conclusion, using IVT-RNA, 40% of NPM-ALK-positive ALCL-patients in remission had detectable NPM-ALK-specific T-cell responses which were mainly restricted by HLA-B and -C alleles. Peptide stimulation of T-cells revealed responses in almost 70% of patients and allowed describing an immunogenic region located in the ALK-kinase domain.


FAU Authors / FAU Editors

Hackstein, Holger Prof. Dr. med.
Professur für Transfusionsmedizin und Cell-Engineering


External institutions with authors

Justus-Liebig-Universität Gießen
Universitätsmedizin der Johannes Gutenberg-Universität Mainz


How to cite

APA:
Singh, V.K., Werner, S., Schwalm, S., Lennerz, V., Ruf, S., Stadler, S.,... Woessmann, W. (2019). NPM-ALK-reactive T-cell responses in children and adolescents with NPM-ALK positive anaplastic large cell lymphoma. OncoImmunology. https://dx.doi.org/10.1080/2162402X.2019.1625688

MLA:
Singh, Vijay Kumar, et al. "NPM-ALK-reactive T-cell responses in children and adolescents with NPM-ALK positive anaplastic large cell lymphoma." OncoImmunology (2019).

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Last updated on 2019-09-07 at 22:08