SARS-CoV-2, the virus responsible for the COVID-19 pandemic, leads to a respiratory syndrome and other manifestations. Most affected people show no or mild symptoms, but the risk of severe disease and death increases in older people. Here, we report a narrative review on selected studies targeting aging-related chronic neuroinflammation in the COVID-19 pandemic. A hyperactivation of the innate immune system with elevated levels of pro-inflammatory cytokines occurs during severe COVID-19, pointing to an important role of the innate immune dysregulation in the disease outcome. Aging is characterized by a general condition of low-grade inflammation, also connected to chronic inflammation of the brain (neuroinflammation), which is involved in frailty syndrome and contributes to several age-associated diseases, including neurodegenerative and neuropsychiatric disorders. Since neuroinflammation can be induced or worsened by the virus infection itself, as well as by stressful conditions like those linked to the recent pandemic, the role of neuroinflammatory mechanisms could be central in a vicious circle leading to an increase in the mortality risk in aged COVID-19 patients. Furthermore, triggered neuroinflammatory pathways and consequent neurodegenerative and neuropsychiatric conditions might be potential long-term complications of COVID-19. In order to provide insights to help clinicians in identifying patients who progress to a more severe case of the disease, this review underlines the potential implications of aging-related neuroinflammation in COVID-19 pandemic.
【저자키워드】 SARS-CoV-2, severe COVID-19, elderly, brain inflammation, COVID-19 neurological and psychiatric manifestations, 【초록키워드】 pandemic, Diseases, aging, COVID-19 pandemic, frailty, risk, outcome, virus, Brain, innate immune system, Patient, Neuroinflammation, death, pathway, Neuropsychiatric, Manifestations, chronic inflammation, virus infection, mechanism, mild symptoms, COVID-19 patients, low-grade inflammation, innate immune, mortality risk, severe disease, dysregulation, Older, disorders, clinician, general condition, syndrome, help, Severe case, pro-inflammatory cytokine, Hyperactivation, complications of COVID-19, MOST, implication, selected, responsible, affected, involved, the disease, elevated, characterized, condition, contribute, occur, increase in, triggered, neurodegenerative, increases in, neuropsychiatric condition, worsened, 【제목키워드】 COVID-19, aging, chronic,