Why tocilizumab could be an effective treatment for severe COVID-19?

• Published in: Journal of translational medicine Vol. 18; no. 1; pp. 164 - 5
• Main Authors: Fu, Binqing, Xu, Xiaoling, Wei, Haiming
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 14.04.2020; BioMed Central; BMC
• Subjects: Acute respiratory distress syndrome (ARDS); Alveoli; Antibodies, Monoclonal, Humanized - therapeutic use; Autopsy; Betacoronavirus; Biopsy; Care and treatment; China; Coronavirus Infections - drug therapy; Coronavirus Infections - immunology; Coronaviruses; COVID-19; COVID-19 Drug Treatment; Exploration; Gas exchange; Health aspects; Hospital patients; Humans; IL-6; Immune response; Immunosuppressive agents; Inflammation; Inflammatory storm; Interleukin 6; Interleukin-6 - antagonists & inhibitors; Interleukins; Lymphocytes T; Medical research; Middle East respiratory syndrome; Monoclonal antibodies; Monocytes; Mortality; Pandemics; Patients; Pneumonia, Viral - drug therapy; Pneumonia, Viral - immunology; Public health; Respiratory diseases; Respiratory distress syndrome; Respiratory function; SARS-CoV-2; Severity of Illness Index; T cells; Tocilizumab; United Kingdom; United Kingdom; China; COVID-19; SARS-CoV-2; Inflammatory storm; Acute respiratory distress syndrome (ARDS); Tocilizumab; IL-6
• DOI: 10.1186/s12967-020-02339-3
• ISSN: 1479-5876

A severe pneumonia-associated respiratory syndrome caused by a new coronavirus was identified in December 2019 (COVID-19), spread rapidly and has become a world-wide public health challenge. About 25% of COVID-19 patients experienced severe complications including acute respiratory distress syndrome (ARDS), and even progressed into an intensive care unit (ICU) admission and died. The exploration for the mortality causes and advancing novel therapeutic development of severe COVID-19 is crucial at the moment. The biopsy samples analysis at autopsy suggested that increased alveolar exudate caused by aberrant host immune response and inflammatory cytokine storm probably impedes alveolar gas exchange and contributes to the high mortality of severe COVID-19 patients. Our research has identified that pathogenic T cells and inflammatory monocytes incite inflammatory storm with large amount of interleukin 6, therefore monoclonal antibody that targets the IL-6 pathways may potentially curb inflammatory storm. Moreover, Tocilizumab treatment that blocking IL-6 receptors showed inspiring clinical results including temperature returned to normal quickly and respiratory function improved. Therefore, we suggest that Tocilizumab is an effective treatment in severe patients of COVID-19 to calm the inflammatory storm and reduce mortality.