Estimation of Cytokines Involved in Acute-Phase Wound Infection with Reference to Residence Time of Patients in Hospitals

Abstract

Background: Cytokines have a major role in mediating immunity as well as inflammation. The main proinflammatory cytokines are activated after injury and implicated in healing interleukin-1 (IL-1), interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α). High levels of IL-6 are recorded at initial inflammatory response and start decreasing down to eight day of wounding while TNF-α level remained static and IL-1α levels showed a different pattern of change following injury and consequence of infection. Methodology: This study was conducted in Al-Kindy and Al-Wasity hospitals in Baghdad on 200 patients suffering from wounds. One hundred patients were with acute wounds infection and the other 100 patients wounded but without infection and considered as control. Interleukin-1α (IL-1α), interleukin-TNF-α (TNF-α) and interleukin-6 (IL-60) were determined utilizing ELISA kit sandwich methods (Elabscience, USA). Results: The present study revealed that the values of IL-1α, and TNF-α at 48 hours of hospitalization were 23.547 and 27.177 pg/ml among patients with infected wounds respectively, and 7.05 and 28.127 pg/ml among patients without wound infections respectively. While IL-6 showed a highest level at 96 hours of residence in hospital and the value was 183.43 pg/ml for patients with infected wounds, and the value of the same interleukin was 88.696 pg/ml at 72 hours of residence of patients without wound infections. Conclusions: Interleukin-1α elevated after 24 hr of infection and then decreased. Proinflammatory cytokines (IL-6) was detectable within 24 hr of infection. The highest concentration of IL-6 was seen with mixed bacteria and followed by gram negative bacteria and this probably due to lipopolysaccharide secretion caused an increase of IL-6 in blood circulation. Irregular changes were seen in TNF-α values with durations of patients stay in hospitals.