Innate and adaptive immune responses that control lymph-borne viruses in the draining lymph node

Area of Science:

• Immunology
• Virology
• Lymphatic System Biology

Background:

• Lymph nodes (LNs) are critical sites for initiating adaptive immunity against pathogens.
• Lymph-borne viruses spread through the lymphatic system, making draining LNs (dLNs) crucial for controlling dissemination.
• Innate immune cells within dLNs are key to early antiviral responses.

Purpose of the Study:

• To review the innate immune responses in dLNs during primary viral infections.
• To explore the role of memory CD8+ T-cells in dLNs during secondary viral infections or after vaccination.

Main Methods:

• This review synthesizes existing research on immune cell interactions and responses within dLNs.
• Focuses on the mechanisms of viral transport to dLNs and subsequent immune cell activation.
• Examines the contribution of myeloid antigen-presenting cells, type I interferons, and NK cells.

Main Results:

• Myeloid antigen-presenting cells initiate innate immunity in dLNs through cellular crosstalk.
• Type I interferons and NK cell activity restrict viral spread during primary infections.
• Memory CD8+ T-cells in dLNs are vital for preventing disease in secondary infections.

Conclusions:

• dLNs are central hubs for innate and adaptive immune responses against lymph-borne viruses.
• Innate immune cell activation and memory T-cell presence in dLNs are critical for viral control and disease prevention.