[Cellular immunity in mice immunized with pertussis vaccine]

Area of Science:

• Immunology
• Microbiology
• Infectious Disease

Background:

• Understanding the mechanisms of vaccine-induced immunity is crucial for developing effective disease prevention strategies.
• Bordetella pertussis causes whooping cough, a significant public health concern, necessitating research into robust immune responses.

Purpose of the Study:

• To investigate the cellular mechanisms underlying post-vaccinal resistance to intracerebral Bordetella pertussis infection in mice.
• To identify the specific immune cells responsible for conferring adoptive immunity.

Main Methods:

• A syngeneous cell transfer model was employed using C57BL/6J and CC57Br mice.
• Various immune cells from immunized donors, including peritoneal cells, neuroglia, spleen, thymus, and lymph node cells, were transferred to recipients.
• The protective capacity of transferred cells against virulent B. pertussis challenge was assessed.

Main Results:

• Peritoneal cells from immunized donors conferred significant adoptive immunity, protecting 57-100% of recipients against intracerebral infection.
• Immune cells derived from heat-inactivated vaccine lost their capacity to induce protective adoptive immunity.
• Specific cell types like neuroglia, spleen, thymus, and lymph node cells showed less pronounced protective effects compared to peritoneal cells.

Conclusions:

• Peritoneal cells play a critical role in mediating vaccine-induced resistance to B. pertussis infection.
• The viability and integrity of the vaccine are essential for generating the cellular components that drive protective immunity.