Nasal Polyposis (NP) is a complex multi-factorial disease; associated with several environmental, genetic and inflammatory factors. TNF-alpha is one of the major pro-inflammatory cytokines involved in NP pathogenesis. Some of the polymorphisms of this gene affect its expression. Therefore, the aim of this study was to evaluate the polymorphism of TNF-alpha G/A308 gene and its association with nasal polyposis in north part of Iran. In this case-control study, 60 patients with NP and 75 healthy individuals referred to Guilan University hospital were evaluated. After DNA extraction, RFLP-PCR was used to determine polymorphism. Chi-square test was used to compare the frequency distribution of genotype and alleles of TNF-alpha gene with NP. The frequency of genotype G/G, A/A and G/A in the NP group was 46.7, 10.0 and 43.3%, and in the control group was 65.3, 5.3 and 29.3%, respectively. There was a statistically significant difference between genotype G/G in two groups (P = 0.006, OR 2.58, CI 1.27-5.23). In addition, the frequency of allele A in patients and controls was 31.7 and 20%, respectively; and this difference was statistically significant (p = 0.02). The findings of this study demonstrated that polymorphism in TNF-alpha gene might be a risk factor for NP in north part of Iran and the minor frequency of G308A allele in the current study is slightly more than other major populations. However, more investigations with high number of population are necessary in future.
Background: The Sambucus Ebulus (ES) L. has an anti-inflammatory role by reducing the expression of pro-inflammatory genes and free radicals. The aim of this study was to evaluate the anti-inflammatory effect of hydroalcoholic extract of SE fruits on eosinophilic nasal polyposis (NP) in Vitro.Method: The chemical composition of SE fruits extract was determined by gas chromatography-mass spectrometry. Polyp Samples were collected from 40 patients and were cut into four pieces (control and case groups). Tissue fragments were treated with 0 (control), 50, 315 and 1000µg/ml of SE FRUIT extract in a culture medium for 24 hours. Apoptosis was detected by TUNEL reaction reagent. Real time-PCR was employed to evaluate the expression of Bax and Bad genes. ELISA was used for assay of IL-5 and GM-CSF.Results: Our findings showed SE fruits extract increased apoptosis in nasal polyp tissues compared to the control group (P<0.001). Also, GM-CSF level in the experimental groups was significantly lower than that in the control group (P<0.001). In contrast, the level of IL-5 was not significantly different in the treatment and control groups (P>0.05). Bax and Bad expression showed a significant increase in the experimental groups compared to the control group (P<0.001).Conclusion: Our findings showed that SE fruits hydroalcoholic extract ameliorates NP trough elevation of apoptosis and reduction of inflammatory markers. Our experimental data revealed that SE fruits extract plays an important role in the treatment of nasal polyp through inducing apoptosis and reducing the survival of inflammatory cells.
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