Induction of Immune Responses and Immune Evasion by Human Bocavirus
Abstract
Respiratory tract infections are the primary cause of morbidity and mortality globally. Human bocavirus 1 (HBoV1), a member of the Parvoviridae family causes a wide spectrum of respiratory diseases in children, and gastroenteritis in adults. The mechanisms of latency, persistence, and reinfection of Bocavirus are poorly understood at present due to the lack of permissive cell lines and efficient animal models. Moreover, the dual infections of HBoV and other respiratory viruses further complicate the study of the pathogenicity of Bocaviruses. The data on immunological consequences of Bocavirus infection are sparse. However, the existing data have highlighted the role of CD4 T cells in Bocavirus infection. High titres of HBoV-specific antibodies have been detected in different populations suggesting its ubiquitous prevalence. Interestingly, the mechanism employed by Bocavirus to evade the immune system mostly targets type I IFN pathways and cause pyroptotic cell death of host cells. This review summarizes the immune responses evoked in response to Bocavirus infection, escape mechanism employed by the virus, and the vaccination strategies, including antisense technology to combat Bocavirus infections.
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