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NAD+ in COVID-19 and viral infections

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TRENDS IN IMMUNOLOGY
卷 43, 期 4, 页码 283-295

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CELL PRESS
DOI: 10.1016/j.it.2022.02.001

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NAD(+) is a promising therapeutic target for COVID-19, and interventions that boost NAD(+) levels may enhance antiviral defense and suppress inflammation. Low NAD(+) concentrations are associated with risk factors for poor COVID-19 outcomes, and viral infections can further deplete NAD(+) and interfere with its roles in antiviral defense and inflammation. Coronaviruses can subvert NAD(+)-mediated actions, but ongoing approaches are exploring ways to boost NAD(+) concentrations to enhance antiviral responses and reduce hyperinflammation.
NAD(+), as an emerging regulator of immune responses during viral infections, may be a promising therapeutic target for coronavirus disease 2019 (COVID-19). In this Opinion, we suggest that interventions that boost NAD(+) levels might promote antiviral defense and suppress uncontrolled inflammation. We discuss the association between low NAD(+) concentrations and risk factors for poor COVID-19 outcomes, including aging and common comorbidities. Mechanistically, we outline how viral infections can further deplete NAD(+) and its roles in antiviral defense and inflammation. We also describe how coronaviruses can subvert NAD(+)-mediated actions via genes that remove NAD(+) modifications and activate the NOD-, LRR-, and pyrin domain-containing protein 3 (NLRP3) inflammasome. Finally, we explore ongoing approaches to boost NAD(+) concentrations in the clinic to putatively increase antiviral responses while curtailing hyperinflammation.

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