HLA-E inhibitor enhances the killing of neuroblastoma stem cells by co-cultured dendritic cells and cytokine-induced killer cells loaded with membrane-based microparticles.
Neuroblastoma stem cells (NSCs) can cause drug resistance and tumor recurrence. This study aimed to enhance the lytic effect of dendritic cells (DCs) co-cultured with cytokine-induced killer (CIK) cells. NSCs were obtained by suspension culture, and DC-CIK cells were loaded with extracted NSC membrane-based microparticles (MMPs) before evaluating the lytic effect of DC-CIK cells on NSCs. After inhibiting the function or expression of human leukocyte antigen-E (HLA-E) in NSCs by anti-HLA-E monoclonal antibody or siRNA, the DC-CIK cell lytic effect on NSCs was re-assessed. NSC nestin expression was high, but glial fibrillary acid protein expression and class IIIβ-tubulin-1 expression were low. Moreover, NSCs exhibited strong tumorigenic ability in nude mice. Loading DCs with NSC-derived MMPs induced the differentiation of DCs and CIK cells and enhanced the killing of NSCs by DC-CIK cells. Inhibiting the function or expression of HLA-E in NSCs further enhanced the cytolytic capability of DC-CIK cells loaded with NSC-derived MMPs. HLA-E inhibitor can enhance the killing of NSC by DC-CIK cells loaded with NSC-derived MMPs.
State Key Laboratory of Oncology in South ChinaGuangzhou, China; Department of Pediatric Oncology, Sun Yat-sen University Cancer CenterGuangzhou, China; Collaborative Innovation Center of Cancer MedicineGuangzhou, China.
Zijun
Z
Zhen
State Key Laboratory of Oncology in South ChinaGuangzhou, China; Sun Yat-sen University Zhongshan School of MedicineGuangzhou, China.
Kaibin
K
Yang
State Key Laboratory of Oncology in South ChinaGuangzhou, China; Sun Yat-sen University Zhongshan School of MedicineGuangzhou, China.
Litong
L
Ye
State Key Laboratory of Oncology in South ChinaGuangzhou, China; Sun Yat-sen University Zhongshan School of MedicineGuangzhou, China.
Zhiyao
Z
You
State Key Laboratory of Oncology in South ChinaGuangzhou, China; Sun Yat-sen University Zhongshan School of MedicineGuangzhou, China.
Rirong
R
Chen
State Key Laboratory of Oncology in South ChinaGuangzhou, China; Sun Yat-sen University Zhongshan School of MedicineGuangzhou, China.
Ying
Y
Liu
State Key Laboratory of Oncology in South ChinaGuangzhou, China; Collaborative Innovation Center of Cancer MedicineGuangzhou, China; Department of Medical Oncology, Sun Yat-sen University Cancer CenterGuangzhou, China.
Youjian
Y
He
Neuroblastoma; human leukocyte antigen; immunotherapy; monoclonal antibody; stem cell