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Alarmins: awaiting a clinical response
James K. Chan, … , Nicole Horwood, Jagdeep Nanchahal
James K. Chan, … , Nicole Horwood, Jagdeep Nanchahal
Published August 1, 2012
Citation Information: J Clin Invest. 2012;122(8):2711-2719. https://doi.org/10.1172/JCI62423.
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Science in Medicine

Alarmins: awaiting a clinical response

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Abstract

Alarmins are endogenous molecules that are constitutively available and released upon tissue damage and activate the immune system. Current evidence indicates that uncontrolled and excessive release of alarmins contributes to the dysregulated processes seen in many inflammatory and autoimmune conditions, as well as tumorigenesis and cancer spread. Conversely, alarmins have also been found to play a major role in the orchestration of tissue homeostasis, including repair and remodeling in the heart, skin, and nervous system. Here, we provide an update and overview on alarmins, highlighting the areas that may benefit from this clinical translation.

Authors

James K. Chan, Johannes Roth, Joost J. Oppenheim, Kevin J. Tracey, Thomas Vogl, Marc Feldmann, Nicole Horwood, Jagdeep Nanchahal

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Figure 2

Induction of chronic and autoimmune inflammation by alarmins by upregulating the adaptive immune response.

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Induction of chronic and autoimmune inflammation by alarmins by upregula...
Alarmins recruit immature DCs and induce their functional maturation, leading them to take up antigens and home to secondary lymphoid organs. Here, they present antigenic epitopes to naive T cells, driving Th1 T cell polarization and inducing an adaptive immune response. Persistent release of alarmins upregulates ectopic MHC type I and II expression and presentation of previously unencountered antigens as well as uncontrolled proliferation of T cells, driving a hyper-inflammatory environment. Adapted with permission from Immunological Reviews (7).

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ISSN: 0021-9738 (print), 1558-8238 (online)

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