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J Infect Dis ; 224(4): 565-574, 2021 08 16.
Article in English | MEDLINE | ID: covidwho-1358458

ABSTRACT

BACKGROUND: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), causing coronavirus disease 2019 (COVID-19), has led to significant morbidity and mortality. While most suffer from mild symptoms, some patients progress to severe disease with acute respiratory distress syndrome (ARDS) and associated systemic hyperinflammation. METHODS: First, to characterize key cytokines and their dynamics in this hyperinflammatory condition, we assessed abundance and correlative expression of a panel of 48 cytokines in patients progressing to ARDS as compared to patients with mild disease. Then, in an ongoing randomized controlled trial of convalescent plasma therapy (CPT), we analyzed rapid effects of CPT on the systemic cytokine dynamics as a correlate for the level of hypoxia experienced by the patients. RESULTS: We identified an anti-inflammatory role of CPT independent of its neutralizing antibody content. CONCLUSIONS: Neutralizing antibodies, as well as reductions in circulating interleukin-6 and interferon-γ-inducible protein 10, contributed to marked rapid reductions in hypoxia in response to CPT. CLINICAL TRIAL REGISTRY OF INDIA: CTRI/2020/05/025209. http://www.ctri.nic.in/.


Subject(s)
COVID-19/immunology , COVID-19/therapy , SARS-CoV-2/immunology , Adult , Anti-Inflammatory Agents/therapeutic use , Antibodies, Neutralizing/immunology , COVID-19/drug therapy , COVID-19/epidemiology , COVID-19/virology , Cytokines/blood , Cytokines/immunology , Female , Humans , Immunization, Passive/methods , India/epidemiology , Male , Middle Aged , Plasma , RNA, Viral/isolation & purification , Respiratory Distress Syndrome/drug therapy , Respiratory Distress Syndrome/immunology , SARS-CoV-2/isolation & purification , Viral Load
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