Abstract
Severe acute respiratory syndrome coronavirus-2-induced hyperinflammation is a major cause of death or end-organ dysfunction in COVID-19 patients. We review adjunct host-directed therapies (HDTs) for COVID-19 management. The use of umbilical cord-derived mesenchymal stem cells as HDT for COVID-19 has been shown to be safe in phase 1 and 2 trials. Trials of anti-interleukin-6 receptor antibodies show promising mortality benefit in hospitalized COVID-19 patients. Repurposed drugs and monoclonal antibodies targeting specific cytokines acting on different aspects of the pro- and anti-inflammatory cascades are under evaluation. A range of HDTs shows promise for reducing mortality and improving long term disability in patients with severe COVID-19, and require evaluation in randomized, controlled trials.
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