@phdthesis{Jensen2019, author = {Christian Jensen}, title = {Impact of FCGR Polymorphisms and KIR/HLA Mismatch on outcome following Immunotherapy of Neuroblastoma patients with ch14.18/CHO combination with IL-2}, journal = {Einfluss von FCGR-Polymorphismen und KIR/HLA-Mismatch auf das Ansprechen von Neuroblastom-Patienten nach einer Immuntherapie mit ch14.18/CHO in Kombination mit IL-2}, url = {https://nbn-resolving.org/urn:nbn:de:gbv:9-opus-25328}, pages = {135}, year = {2019}, abstract = {Neuroblastoma (NB) is an aggressive, poorly immunogenic tumor in childhood. Therapy for high-risk NB remains challenging. Immunotherapy with anti-GD 2 antibody ch14.18/CHO effectively prolongs the survival of NB patients. Killer-immunoglobulin-like receptor (KIR)/human leucocyte antigen (HLA) mismatch and Fc gamma receptor (FCGR) polymorphisms are reported to affect antibody-dependent cellular cytotoxicity (ADCC) induced by monoclonal antibodies. To determine whether FCGR polymorphisms and KIR/HLA mismatch are associated with the survival following ch14.18-based immunotherapy, genotyping methods that allow for genotype determination of FCGR2A, -3A, -3B, KIR2DL1, 2DL2, 2DL3, and 3DL1 have been established and applied to the analysis of 53 NB patients treated with ch14.18/CHO. High-affinity polymorphisms of FCGR2A (H131) and FCGR3A (V158) were associated with improved survival. Importantly, patients displaying both the FCGR3A-V158 and FCGR2A-H131 alleles exhibited significantly improved event-free survival. No association was found between KIR/HLA genotypes or FCGR3B alleles and patients’ survival in our patient cohort. In conclusion, impact of FCGR2A and -3A genotypes in response to ch14.18/CHO immunotherapy in combination with IL2 was demonstrated. FCGR2A and -3A might therefore provide a prognostic marker when conducting ch14.18/CHO-based immunotherapy.}, language = {en} }