serum interleukins 6 and 8 in mild and severe asthmatic patients, is it difference?

background: about 5–10% of patients with asthma suffer from poorly-controlled disease despite corticosteroid (cs) therapy. methods: 21 severe and 30 mild asthma patients were recruited and underwent collection of blood sample. we determined whether there were any differences in inflammatory biomarkers between severe and mild asthma patients or not.results: levels of interleukin-8 (il-8) and interleukin-6 (il-6) in blood supernatants were similar in both groups of asthma patients. leukocytes were in range of normal in all patients. increased eosinophil was in 29% of severe cases and 23% in mild cases. ige level was increased in 43% of severe form and 50% in mild form.conclusion: there is not any difference between severe and mild asthma in serum il-8 and il-6. therefore, level of serum cytokines may not predict severity of asthma.