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Treatment of COVID-19 patients with the anti-CD6 antibody itolizumab #MMPMID33304584
Caballero A; Filgueira LM; Betancourt J; Sanchez N; Hidalgo C; Ramirez A; Martinez A; Despaigne RE; Escalona A; Diaz H; Merino E; Ortega LM; Castillo U; Ramos M; Saavedra D; Garcia Y; Lorenzo G; Cepeda M; Arencibia M; Cabrera L; Domecq M; Estevez D; Valenzuela C; Lorenzo P; Sanchez L; Mazorra Z; Leon K; Crombet T
Clin Transl Immunology 2020[]; 9 (11): e1218 PMID33304584show ga
OBJECTIVES: COVID-19 can lead to a hyperinflammatory state. CD6 is a glycoprotein expressed on mature T lymphocytes which is a crucial regulator of the T-cell activation. Itolizumab is a humanised antibody targeting CD6. Nonclinical and clinical data in autoimmune diseases indicate that it lowers multiple cytokines primarily involving the Th1/Th17 pathway. The primary objective of this study was to assess the impact of itolizumab in arresting the lung function deterioration of COVID-19 patients. Secondary objectives included safety, duration of ventilation, 14-day mortality and evaluation of interleukin 6 concentration. METHODS: Patients with confirmed SARS-CoV-2 received itolizumab in combination with other therapies included in the national protocol for COVID-19. RESULTS: Seventy critical, severe or moderate patients were treated with itolizumab in 10 Cuban hospitals. Median age was 68, and 94% had comorbidities. After 72 h, most patients improved the PO(2)/FiO(2) ratio and reduced FiO2 requirements. Ventilation time was 8 days for critical and 1 day for severe cases. Ten patients had related adverse events while 3 subjects developed related serious events. In 30 patients, interleukin 6 decreased in individuals with high level and did not change in those with lower concentration. Fourteen-day lethality rate was 4% and 18% for moderate and severe patients, respectively. The proportion of moderate or severe patients with ventilation or death at day 14 was 9.8%. Time to treatment, neurological manifestations and biomarkers such as NLR were significantly associated with higher lethality. CONCLUSIONS: The opportune administration of itolizumab might interrupt the hyperinflammatory cascade and prevent COVID-19 morbidity and mortality.