Significant Changes of 5-Hydroxytriptamine 3A Receptor Gene Expression in Peripheral Blood Mononuclear Cells of Allergic Asthmatic Patients
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Abstract
Asthma is a chronic inflammatory disorder of the airways. The stress is a factor for asthma which indicates a disorder in the function of communicational mediators of nervous and immunological systems such as neurotransmitters. A study indicated that blood serotonin concentration increases in asthmatic patients. Other study indicates that one kind of the serotonin receptors, named 5HT3A, on PBMCs causes secretion of series of pro- inflammatory cytokines which play important roles in allergic asthma disease. Thus, we evaluated the ratio expression level of 5HT3A subtype receptors in asthma.
The Peripheral Blood Mononuclear Cells were separated from whole blood of 30 allergic asthmatic patients and 30 normal controls by a gradient density centrifugation technique, then the total cellular RNA was extracted and the cDNA was synthesized. This process was followed by real-time PCR using primer pairs specific for 5-hydroxytryptamine 3A subtype receptor mRNA and beta-actin as internal control.
Results revealed that relative gene expression of 5-hydroxytryptamine 3A subtype receptor increased significantly in Peripheral Blood Mononuclear Cells of patients with asthma in comparison with normal individuals.
To conclude, considering 5-hydroxytryptamine 3A subtype receptor role in accomplishment of asthma symptoms, this increase in its expression may exacerbate the seriousness of asthma disease.
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