Oral Presentation Lorne Infection and Immunity 2021

Pulmonary vaccines against Tuberculosis - effective and feasible (#19)

Warwick Britton 1
  1. NHMRC Centre of Research Excellence in Tuberculosis Control, Centenary Institute and University of Sydney, Sydney, NSW, Australia

More effective vaccines are essential to control the continuing pandemic of Tuberculosis (TB) globally. Two new developments in pulmonary TB vaccines will be presented. First, we have synthesised a whole protein conjugate vaccine linking the adjuvants, Pam2Cys and Pam3Cys, to the M. tuberculosis secreted protein ESAT-6. Delivery of these vaccines to the lungs stimulated antigen-specific Th1 and Th17 T cell responses that were associated with protection against M. tuberculosis lung infection in mice. Second, we have defined the characteristics of lung tissue-resident memory CD4 T cells induced by two different TB vaccines, viral (rIAV-P25) and protein/adjuvant (CysVac2/Advax) vaccines, that are protective when delivered to the lungs. The transcriptional similarities and differences between the lung TRM stimulated by these vaccines will be discussed.