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Updated: Jul 12, 2026

Evaluation of Host-Pathogen Responses and Vaccine Efficacy in Mice
Published on: February 22, 2019
Alarmins initiate host defense
Joost J Oppenheim1, Poonam Tewary, Gonzalo de la Rosa
1Laboratory of Molecular Immunoregulation, Center for Cancer Research, NCI, Frederick, MD, USA. Oppenhei@ncifcrf.gov
Alarmins are immune system mediators released during infection or injury. These molecules alert the immune system, recruiting and activating white blood cells to enhance immune responses.
Area of Science:
- Immunology
- Cell Biology
- Molecular Medicine
Background:
- The innate immune system rapidly produces mediators in response to infection or tissue injury.
- These mediators, termed alarmins, are crucial for innate defense and alerting the adaptive immune system.
- Alarmins play a role in leukocyte recruitment and activation via specific receptor interactions.
Purpose of the Study:
- To discuss the characteristics of known alarmins.
- To explore potential alarmin candidates.
- To examine the implications of alarmins in immune responses.
Main Methods:
- Review of existing literature on alarmins.
- Analysis of molecular structures and functions of alarmins.
- Discussion of receptor interactions and downstream signaling pathways.
Main Results:
- Alarmins are structurally diverse mediators with potent immune-activating properties.
- They enhance antigen-presenting cell (APC) activation.
- Alarmins promote the development of antigen-specific immune responses.
Conclusions:
- Alarmins are key signaling molecules bridging innate and adaptive immunity.
- Understanding alarmin function is critical for developing novel immunotherapies.
- Further research into alarmin candidates holds significant therapeutic potential.
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