Immune Competence and Pain: A Narrative Review

Coaccioli S, Sarzi-Puttini P, Fornasari DMM, Schweiger V, Zis P, Viswanath O, Varrassi G. Immune Competence and Pain: A Narrative Review. Curr Pain Headache Rep. 2024 Jun 27. doi: 10.1007/s11916-024-01282-y. Epub ahead of print. PMID: 38935243.
 

Abstract
Purpose of review:
This review aims to summarize current knowledge on the pathophysiology of pain and the role of neuro-immune crosstalk in the development of acute and chronic pain (CP). Specifically, the review focuses on the role of immune cells involved in the innate and acquired immune response, emphasizing their bidirectional interactions with the nervous systems and discussing the implications of this crosstalk on acute and CP management.

Recent findings: In the last two decades, multiple studies have uncovered the important role of the immune system in initiating, maintaining, and resolving pain stimuli. Furthermore, researchers discovered that the immune system interacts tightly with the nervous system, creating a bidirectional crosstalk in which immune cells influence the response of peripheral and central nerve fibers while neurotransmitters and neuropeptides released by nociceptors directly and indirectly modulate the immune response. The neuro-immune crosstalk in acute and CP is a complex and not fully understood process that comprise the interactions of multiple diverse molecules, bidirectional interferences, and numerous redundant processes. Despite the complexity, important steps have been taken in recent years toward explaining the specific roles of each immune cell type and molecule in the initiation, maintenance and resolution of pain. These findings may set the basis for innovative therapeutic options that target the immune system, overcoming the limitations of current treatments in providing pain relief and the disadvantages associated with opioid therapy.

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