Repurposing low-dose naltrexone (LDN) for the prevention and treatment of immunothrombosis in COVID-19 (Abstract)

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Repurposing low-dose naltrexone (LDN) for the prevention and treatment of immunothrombosis in COVID-19

Eur Heart J Cardiovasc Pharmacother
18 February 2022
https://pubmed.ncbi.nlm.nih.gov/35179184/

Coronavirus disease 2019 (COVID-19) is characterized by striking dysregulation of the immune system, with evidence of hyperinflammation, an impaired induction of interferons, and delayed adaptive immune responses. In addition to dysfunctional immune responses, thrombosis is a hallmark of severe COVID-19. Because traditional anticoagulation strategies are associated with increased bleeding, novel strategies that address both the immune and thrombotic dysfunction associated with COVID-19 would be of tremendous benefit. In this commentary, we discuss the unique properties of low dose naltrexone (LDN) which could be leveraged to reduce the immune-mediated thrombotic complications in COVID-19. Mechanistically, LDN can blunt innate immune responses and Toll-like receptor (TLR) signaling, reducing interleukin1 (IL-1), tumor necrosis factor-alpha (TNF-α), and interferon (IFN) levels. Because of the immune-mediated thrombotic mechanisms that underlie COVID-19, we hypothesize that the immune-modulating and known pharmacologic properties of LDN could be leveraged as a novel therapeutic strategy in COVID-19.

Keywords: COVID-19; Naltrexone; biomarkers; inflammation; thrombosis.