Asunto(s)
Betacoronavirus/fisiología , Infecciones por Coronavirus , Enalapril/farmacología , Losartán/farmacología , Pandemias , Peptidil-Dipeptidasa A , Neumonía Viral , Serina Endopeptidasas , Bloqueadores del Receptor Tipo 2 de Angiotensina II/farmacología , Enzima Convertidora de Angiotensina 2 , Inhibidores de la Enzima Convertidora de Angiotensina/farmacología , Animales , COVID-19 , Infecciones por Coronavirus/metabolismo , Infecciones por Coronavirus/virología , Masculino , Ratones , Ratones Endogámicos C57BL , Peptidil-Dipeptidasa A/genética , Peptidil-Dipeptidasa A/metabolismo , Neumonía Viral/metabolismo , Neumonía Viral/virología , ARN Mensajero/análisis , SARS-CoV-2 , Serina Endopeptidasas/genética , Serina Endopeptidasas/metabolismo , Distribución TisularRESUMEN
PURPOSE: Novel Coronavirus disease 2019 (COVID-19), is an acute respiratory distress syndrome (ARDS), which is emerged in Wuhan, and recently become worldwide pandemic. Strangely, ample evidences have been shown that the severity of COVID-19 infections varies widely from children (asymptomatic), adults (mild infection), as well as elderly adults (deadly critical). It has proven that COVID-19 infection in some elderly critical adults leads to a cytokine storm, which is characterized by severe systemic elevation of several pro-inflammatory cytokines. Then, a cytokine storm can induce edematous, ARDS, pneumonia, as well as multiple organ failure in aged patients. It is far from clear till now why cytokine storm induces in only COVID-19 elderly patients, and not in young patients. However, it seems that aging is associated with mild elevated levels of local and systemic pro-inflammatory cytokines, which is characterized by "inflamm-aging". It is highly likely that "inflamm-aging" is correlated to increased risk of a cytokine storm in some critical elderly patients with COVID-19 infection. METHODS: A systematic search in the literature was performed in PubMed, Scopus, Embase, Cochrane Library, Web of Science, as well as Google Scholar pre-print database using all available MeSH terms for COVID-19, Coronavirus, SARS-CoV-2, senescent cell, cytokine storm, inflame-aging, ACE2 receptor, autophagy, and Vitamin D. Electronic database searches combined and duplicates were removed. RESULTS: The aim of the present review was to summarize experimental data and clinical observations that linked the pathophysiology mechanisms of "inflamm-aging", mild-grade inflammation, and cytokine storm in some elderly adults with severe COVID-19 infection.