A meta analysis on the utility of Anakinra in severe COVID-19 disease

Background and objective: The most important presentation of COVID-19 is hyper inflammatory condition and cytokine storm that occurs due to excessive increase of the inflammatory mediators specially, pro-inflammatory interleukins such as IL-1 & beta;, IL-6 and tumor necrosis factor-& alpha; which have an important role in the cytokine storm pathway. Up till now there is not a definitive treatment for COVID-19 disease, but according to the patho-physiology of the disease, Anakinra (Interleukin-1 inhibitor) is an adjuvant treatment option in patients with severe COVID-19 by blocking the effect of IL-1. So, we aimed to summarize the studies that evaluated the safety and efficacy of Anakinra in patients diagnosed with COVID-19.Methods: We performed a search in PubMed, Cochrane Library, Scopus, and Web of Science (WOS) databases from inception till 7 Jan 2022. Additionally, we searched randomized and non-randomized clinical trials, cohort, case series, case control, case report more than 3 patients which contain confirmed cases of COVID-19 who received Anakinra (Interleukin-1 inhibitor) for the management of hyper-inflammatory condition associated with COVID-19 disease. A meta-analysis was conducted using review manager 5.4.Results: We included 44 articles in the systematic review. Ultimately, 23 studies were incorporated in the meta -analysis with a total number of 3179 patients. Our analysis showed statistically significant difference in the following outcomes: duration of ICU stays [MD =-0.65, 95% CI (-1.09,-0.03), p = 0.04], the number of patients who needed invasive mechanical ventilation [RR = 0.57, 95% CI (0.39, 0.84), p = 0.004], and number of deaths [RR = 0.80, 95% CI (0.66, 0.99), p = 0.04]. Our analysis showed no statistically significant difference in the following outcomes: length of hospital stays [MD =-0.16, 95% CI (-0.42, 0.11), p = 0.26], oxygen-free days [MD =-0.81, 95% CI (-3.81, 2.20), p = 0.60], and the number of patients who needed non-invasive mechanical ventilation [RR = 1.09, 95% CI (0.47, 2.52), p = 0.84].Conclusion: Anakinra showed some promising results in important outcomes related to COVID-19 as it signifi-cantly reduced the rate of mortality and the need of invasive mechanical ventilation. It should be used in severe cases more than mild and moderate cases to avoid possible immunosuppression complications. Anakinra use is safe in cases of COVID-19 at dose less than 100 mg. Another important outcome was significant reduction is the D-dimer level. Anakinra may be effective in the treatment of specific immunocompromised cases, but it should be used cautiously.