Summary
Recent studies indicated that interleukin (IL)-17, growth-related oncogene (GRO)-α and IL-8 play an important role in the pathogenesis of nasal polyps. However, the effects of the increased amount of IL-17 and the production of GRO-α and IL-8 in human nasal polyp fibroblasts are not completely understood. This study aimed to determine the effects of the increased IL-17 on the changes of GRO-α and IL-8 expression in human nasal polyp fibroblasts and further investigate the mechanism of neutrophil infiltration in nasal polyps. Nasal polyp fibroblasts were isolated from six cases of human nasal polyps, and the cells were stimulated with five different concentrations of IL-17. Real-time fluorescence quantitative polymerase chain reaction (RT-PCR) was used to detect the mRNA expression of GRO-α and IL-8. The mRNA of GRO-α and IL-8 was expressed in unstimulated controls and remarkably increased by stimulation with IL-17. Moreover, the levels of GRO-α and IL-8 produced by fibroblasts were increased gradually with the increases in IL-17 concentrations. The present study showed that nasal fibroblasts can produce GRO-α and IL-8, and their production is remarkably enhanced by IL-17 stimulation, thereby clarifying the mechanism of the IL-17 mediated neutrophil infiltration in nasal polyps. These findings might provide a rationale for using IL-17 inhibitors as a treatment for nasal inflammatory diseases such as nasal polyps.
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This project was supported by grants from Research and National Promotion of Early Detection, Standardized Diagnosis and Treatment, and Preventive Strategy for Major Otology and Rhinologic Diseases (No. 201202005), Wu Jieping Medical Foundation (No. LC1345), and Foundation of Hubei Province Key Laboratory of Molecular Imaging (No. 02.03.2013-64).
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Niu, Yz., Gong, Gq., Chen, S. et al. Effects of IL-17 on expression of GRO-α and IL-8 in fibroblasts from nasal polyps. J. Huazhong Univ. Sci. Technol. [Med. Sci.] 34, 591–595 (2014). https://doi.org/10.1007/s11596-014-1321-1
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DOI: https://doi.org/10.1007/s11596-014-1321-1