Impact of Proinflammatory Cytokines: (Interleukin 6, Interleukin 1α, and Interleukin 1β) on Biochemical Parameters in Severe Acute Respiratory Syndrome Coronavirus 2 Patients in Iraq
Background: The cytokine storm and specific biochemical results were both observed during Coronavirus disease 2019 (COVID‑19) infection. The aim of this study was to see if there was any correlation between biochemical findings and cytokine levels. Methods: A total of 65 COVID‑19 patients, including 32 males and 33 females with ages between (16 and 90 years) were enrolled in this study. Between December 2020 and February 2021, these patients were admitted to Al‑Amal Specialized Hospital or ward of COVID‑19 care in Al‑Sader Hospital. These patients were classified into severe/critical (43 cases), mild/moderate (22 cases) according to the guidelines released by National Health World depending on SpO2 percentage. The biochemical indices were measured using FUJI DRI‑CHEM NX500 automated clinical chemistry analyzer (FUJIFILM, Japan). The proinflammatory cytokine (interleukin‑6 [IL‑6], IL‑1α, and IL‑1β) were measured using ELISA technique. Results: IL-6 serum levels were negatively correlated with SpO2 (P = 0.002, R = - 0.372) and serum albumin (P = 0.034, R = - 0.301). IL-1α serum levels showed significant negative correlation with serum albumin levels (P = 0.039, R = - 0.259). Furthermore, a positive correlation found between IL-1β serum with serum levels of both AST and LDH (P = 0.049; R = 0.255; P = 0.054; R = 0.320 respectively). Discussion: Increased IL-6 serum levels have a direct impact on SpO2 percentage and serum albumin. Whereas the elevated levels of both IL-1α and IL-1β are a possible cause of acute inflammation and liver damage in COVID-19. Conclusions: This study further confirms the growing evidence on the direct role of proinflammatory cytokines in the biochemical changes shown in COVID‑19.