Truncated Chicken MDA5 Enhances the Immune Response to Inactivated NDV Vaccine

Publication date: Available online 18 December 2018Source: Veterinary Immunology and ImmunopathologyAuthor(s): Qingsong Han, Xiaolong Gao, Zhili Chu, Xiangwei Wang, Fathalrhman Eisa Addoma Adam, Shuxia Zhang, Yanqing Jia, Xinxin Qiu, Xinglong Wang, Zengqi YangAbstractMelanoma Differentiation-Associated protein 5 (MDA5) is a cytoplasmic sensor for viral invasion and plays an important role in regulation of the immune response against Newcastle disease virus (NDV) in chickens. MDA5 was used as an adjuvant to enhance the humoral immune response against influenza virus. In the current study, truncated chicken MDA5 [1 - 483 aa, chMDA5(483aa)] expressed by recombinant adenovirus was administered to specific-pathogen-free (SPF) chickens to improve the immune response induced by inactivated NDV vaccine. A total of 156 SPF chickens were divided into six groups, and after two rounds of immunization, the humoral immune response, cell-mediated immune (CMI) response and the protective efficacy of the vaccines against NDV challenge were evaluated. The results showed that co-administration of chMDA5(483aa) expressed by adenovirus increased the NDV-specific antibody response by 1.7 times and chickens received chMDA5(483aa) also gained a higher level of CMI response. Consistently, the protective efficacy of the inactivated NDV vaccine against virulent NDV (vNDV) challenge was improved by co-administrate with chMDA5(483aa), as indicated by the reduced morbidity and pathological lesions, lower ...
Source: Veterinary Immunology and Immunopathology - Category: Veterinary Research Source Type: research