Interleukin (IL)-17A and IL-17F and asthma in Saudi Arabia: mRNA transcript levels and gene polymorphisms
2013
Asthma is a multifactorial disorder and both genetic and environmental factors contribute to its development. The present study explored cytokines interleukin (IL)-17A and IL17F levels as usable parameters for the diagnosis of asthmatics Saudi patients. Blood samples were collected from 100 asthma patients and 100 matched controls. The transcript mRNA levels in whole blood were determined by real-time reverse-transcription polymerase chain reaction. Expression studies showed that levels of IL17A and IL17F were significantly higher in asthma patients compared to controls [IL17A: 1.112 (2.088) vs 0.938 (1.363)]; IL17F: 0.707 (1.33) vs 0.667 (0.590). The mRNA transcripts of IL17A and IL17F were positively and significantly correlated in all subjects examined in this study: controls as well as asthma patients (r = 0.455, P < 0.01 for controls and r = 0.644, P < 0.01 for patients). These findings suggest that asthma is characterized by an elevation of cytokines IL17A and IL17F and the measurement of their expression can be a valuable parameter for the diagnosis of asthma.
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