T cell reactivity to Bordetella pertussis is highly diverse regardless of childhood vaccination.

The incidence of whooping cough due to Bordetella pertussis (BP) infections has increased recently. It is believed that the shift from whole-cell pertussis (wP) vaccines to acellular pertussis (aP) vaccines may be contributing to this rise. While T cells are key in controlling and preventing disease, nearly all knowledge relates to antigens in aP vaccines. A whole-genome mapping of human BP-specific CD4+ T cell responses was performed in healthy vaccinated adults and revealed unexpected broad reactivity to hundreds of antigens. The overall pattern and magnitude of T cell responses to aP and non-aP vaccine antigens are similar regardless of childhood vaccination, suggesting that asymptomatic infections drive the pattern of T cell reactivity in adults. Lastly, lack of Th1/Th2 polarization to non-aP vaccine antigens suggests these antigens have the potential to counteract aP vaccination Th2 bias. These findings enhance our insights into human T cell responses to BP and identify potential targets for next-generation pertussis vaccines. [Display omitted] • Recent increase in whooping cough may be linked to the shift from wP to aP vaccines • Genome-wide screening revealed broad T cell reactivity to hundreds of antigens • Similar recognition of aP and non-aP antigens regardless of childhood vaccination • Non-aP vaccine antigens could balance aP vaccination Th2 bias da Silva Antunes et al. conducted a genome-wide screening of human Bordetella-pertussis -specific CD4+ T cell responses in healthy vaccinated adults. Targets with similar reactivity patterns were identified regardless of childhood vaccination. Lack of Th1/Th2 polarization to non-aP (acellular pertussis) vaccine antigens could counteract aP vaccination bias, informing next-generation pertussis vaccines. [ABSTRACT FROM AUTHOR]