Affiliation:
1. College of Veterinary Medicine Yangzhou University Yangzhou Jiangsu 225000 China
2. Jiangsu Co‐innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses Yangzhou 225000 China
3. Department of Infectious Diseases and Immunology College of Veterinary Medicine University of Florida Gainesville FL 32611‐0880 USA
4. Joint International Research Laboratory of Agriculture and Agri‐Product Safety Yangzhou University (JIRLAAPS) Yangzhou 225000 China
Abstract
AbstractEngineered vector‐based in vivo protein delivery platforms have made significant progress for both prophylactic and therapeutic applications. However, the lack of effective release strategies results in foreign cargo being trapped within the vector, restricting the provision of significant performance benefits and enhanced therapeutic results compared to traditional vaccines. Herein, the development of a Salmonella mRNA interferase regulation vector (SIRV) system is reported to overcome this challenge. The genetic circuits are engineered that (1) induce self‐lysis to release foreign antigens into target cells and (2) activate the cytosolic surveillance cGAS‐STING axis by releasing DNA into the cytoplasm. Delayed synthesis of the MazF interferase regulates differential mRNA cleavage, resulting in a 36‐fold increase in the delivery of foreign antigens and modest activation of the inflammasome, which collectively contribute to the marked maturation of antigen‐presenting cells (APCs). Bacteria delivering the protective antigen SaoA exhibits excellent immunogenicity and safety in mouse and pig models, significantly improving the survival rate of animals challenged with multiple serotypes of Streptococcus suis. Thus, the SIRV system enables the effective integration of various modular components and antigen cargos, allowing for the generation of an extensive range of intracellular protein delivery systems using multiple bacterial species in a highly efficient manner.
Funder
National Natural Science Foundation of China
Higher Education Discipline Innovation Project
Subject
General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)