A new DNA vaccine fused with the C3d-p28 induces a Th2 immune response against amyloid-beta*
Wanshu Guo
Sha Sha
Tongzi Jiang
Xiaona Xing
Yunpeng Cao
摘要：To enhance anti-amyloid-beta (Aβ) antibody generation and induce a Th2 immune response, we constructed a new DNA vaccine p(Aβ3-10 )10-C3d-p28.3 encoding ten repeats of Aβ3-10 and three copies of C3d-p28 as a molecular adjuvant. In this study, we administered this adjuvant intramus-cularly to female C57BL/6J mice at 8-10 weeks of age. Enzyme linked immunosorbent assay was used to detect the titer of serum anti-Aβ antibody, isotypes, and cytokines in splenic T cel s. A 3-(4,5-cimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay was used to detect the prolifera-tion rate of splenic T cel s. Brain sections from a 12-month-old APP/PS1 transgenic mouse were used for detecting the binding capacities of anti-Aβ antibodies to Aβ plaques. The p(Aβ3-10)10-C3d-p28.3 vaccine induced high titers of anti-amyloid-βantibodies, which bound to Aβplaques in APP/PS1 transgenic mouse brain tissue, demonstrating that the vaccine is effective against plaques in a mouse model of Alzheimer’s disease. Moreover, the vaccine elicited a pre-dominantly IgG1 humoral response and low levels of interferon-γ in ex vivo cultured splenocytes, indicating that the vaccine could shift the cel ular immune response towards a Th2 phenotype. This indicated that the vaccine did not elicit a detrimental immune response and had a favorable safety profile. Our results indicate that the p(Aβ3-10)10-C3d-p28.3 vaccine is a promising immunothera-peutic option for Aβvaccination in Alzheimer’s disease.
机标关键词：immune responsetransgenic mouselinked immunosorbent assaymouse modelDNA vaccine
资助基金：This study was supported by the National Natural Science Foundation of China, (No.30471927)
论文发表日期：2013-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：10( 2581-2590 )
英文信息