alexa Discovery of YB-1 as a new immunological target in neuroblastoma by vaccination in the context of regulatory T cell blockade.
Neurology

Neurology

Brain Disorders & Therapy

Author(s): Zheng J, Jing W, Orentas RJ

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Abstract Neuroblastoma is one of the most common solid tumors in infancy and early childhood. Using the A/J mouse and a syngeneic neuroblastoma cell line AGN2a, we induced a strong anti-neuroblastoma cellular immune response when AGN2a transfected to express costimulatory molecules (CD80/CD86/CD54/CD137L) was used as a vaccine in the context of regulatory T cell blockade. Strong humoral immunity was induced by AGN2a-4p immunization in the context with regulatory T cell blockade. Serum from treated mice was used to screen an AGN2a cDNA expression library that was constructed with lambda ZAP express vector in order to identify tumor-associated antigens by SEREX. Twenty one clones were identified by sequencing and comparative analysis of gene pools. Most transcripts play some roles in the neuronal differentiation, cell metabolism, or have previously been identified as transcripts that are over-expressed in other malignancies. The most commonly identified tumor-associated antigen, using serum from AGN2a-4p immunization with Treg blockade mice, was YB-1 protein that also induced a T cell response. These results indicated that potential neuroblastoma-associated antigens were found by the sera from mice immunized with tumor cells expressing costimulatory molecules with regulatory T cell function blockade. The identification of YB-1 as tumor-associated antigens capable of eliciting a T cell response validates our experimental approach and argues for the antigens we have identified here to be evaluated as targets of effector immunity and as vaccine candidates.
This article was published in Acta Biochim Biophys Sin (Shanghai) and referenced in Brain Disorders & Therapy

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