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NO in Viral Infections: Role and Development of Antiviral Therapies

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MOLECULES
卷 27, 期 7, 页码 -

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MDPI
DOI: 10.3390/molecules27072337

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nitric oxide; viral infections; NO-donors; inhalation therapy; COVID-19

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Nitric oxide plays a crucial role in viral infections, particularly respiratory viral infections. By regulating nitric oxide synthesis, antiviral therapies based on nitric oxide can be developed. This review provides a comprehensive overview of the role of nitric oxide in viral infections and the development of nitric oxide-based antiviral strategies, with a particular focus on its clinical use in the prevention and treatment of COVID-19.
Nitric oxide is a ubiquitous signaling radical that influences critical body functions. Its importance in the cardiovascular system and the innate immune response to bacterial and viral infections has been extensively investigated. The overproduction of NO is an early component of viral infections, including those affecting the respiratory tract. The production of high levels of NO is due to the overexpression of NO biosynthesis by inducible NO synthase (iNOS), which is involved in viral clearance. The development of NO-based antiviral therapies, particularly gaseous NO inhalation and NO-donors, has proven to be an excellent antiviral therapeutic strategy. The aim of this review is to systematically examine the multiple research studies that have been carried out to elucidate the role of NO in viral infections and to comprehensively describe the NO-based antiviral strategies that have been developed thus far. Particular attention has been paid to the potential mechanisms of NO and its clinical use in the prevention and therapy of COVID-19.

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