Correlation between IL-17A expression in nasopharyngeal carcinoma tissues and cells and pathogenesis of NPC in endemic areas.

OBJECTIVE: We investigated the correlation between the expression of IL-17A in nasopharyngeal carcinoma tissues and cells and the occurrence and development of NPC was also investigated. METHODS: Forty-five NPC biopsy specimens from January 2014 to January 2016 were selected. Forty-five NPC tissue specimens and 45 chronic nasopharyngitis tissue samples were detected by immunohistochemistry. Statistical methods were used to analyze the correlation between IL-17A expression and the clinicopathological variables of NPC. The NPC patients were followed up. The levels of IL-17A mRNA in 40 NPC tissue specimens and 45 chronic nasopharyngitis tissue samples were detected by real-time PCR. IL-17A expression in 15 NPC tissue specimens and chronic nasopharyngitis tissue samples was further detected by Western blotting assays. RESULTS: IL-17A expression in NPC tissues was significantly higher than that of chronic nasopharyngitis tissues (P < 0.05). IL-17A was expressed in the nucleus and cytoplasm of both NPC tissues and chronic nasopharyngitis tissues. Stage III + IV NPC, tumor volume ≥ 50 mm, and hepatic envelope invasion and cervical lymph node metastasis were associated with significantly higher IL-17A levels versus stage I + II NPC, tumor size < 50 mm, no membrane invasion and lack of cervical lymph node metastasis (P < 0.05). IL-17A was statistically associated with tissue differentiation, serum EBV-lgA levels, and EBV infection. IL-17A-positive patients had significantly longer median survival versus IL-17A-negative patients (21.0 vs. 13.0 months, log-rank test: P < 0.05). Furthermore, 65% (26/40) of NPC tissue samples had significantly higher IL-17A mRNA levels than chronic nasopharyngitis (P < 0.05). IL-17A expression was significantly higher in NPC ≥ 50 mm, stage III + IV NPC and NPC with cervical lymph node invasion than its corresponding chronic nasopharyngitis tissue. CONCLUSION: IL-17A may be involved in the regulation of various malignant biological behaviors of NPC, which is closely related to the occurrence and development of NPC.

MicroRNA-135a Inhibits Nasopharyngeal Carcinoma Cell Proliferation Through Targeting Interleukin-17.

BACKGROUND/AIMS: The objective of this study was to investigate the potential role of IL-17 in the development of nasopharyngeal carcinoma (NPC) and to screen microRNAs (miRNAs) that potentially target IL-17 in NPC cells. METHODS: Blood was collected from NPC patients and normal subjects, and plasma IL-17 concentration was quantified by enzyme-linked immunosorbent assay. An immortalized normal human nasopharyngeal epithelial cell line, NP69, was treated with or without human IL-17 (15 ng/mL) for various times, and expression of IL-1ß, IL-6, IL-12, and TNF-α mRNA was assessed by real-time reverse transcription PCR. The candidate miRNAs that potentially target IL-17 were predicted by a bioinformatics strategy. The selected miR-135a mimic was transfected into primary NPC cells, and cell proliferation was assessed by MTT assay. RESULTS: The concentration of plasma IL-17 was significantly higher in the NPC patients (92.5 ± 7.3 pg/mL) than in the control subjects (56.8 ± 2.9 pg/mL). In response to IL-17 treatment, the mRNA expression of IL-1ß and IL-6 was significantly upregulated and reached a peak at 12 h, followed by a slight decrease at 24 h, while the mRNA expression of IL-12 and TNF-α was significantly upregulated at 12 h and remained high even at 48 h after exposure to IL-17. Moreover, miR-135a specifically targets IL-17 and was dramatically downregulated in NPC cells compared with NP69 cells. Transfection of exogenous miR-135a mimic resulted in significant suppression of IL-17 secretion and subsequent inhibition of NPC cell proliferation. CONCLUSIONS: Blood IL-17 was significantly higher in NPC patients compared with normal subjects. Expression of miR-135a in the cancer cells isolated from nasopharyngeal tumors was significantly lower than that in NP69 cells, and suppression of IL-17 by miR-135a mimic resulted in significant inhibition of NPC cell proliferation. These findings suggested that downregulation of miR-135a may contribute to the development of NPC via the mechanism of IL-17 stimulation of proinflammatory cytokine expression.

Improvement in Psychological Condition of Patients With Persistent Moderate-Severe Allergic Rhinitis by Drug Therapy Combined With Psychological Intervention.

OBJECTIVE: To investigate the effect of drug treatment combined with psychological intervention on mental disorders in patients with persistent moderate-severe allergic rhinitis. METHODS: Sixty patients with persistent moderate-severe allergic rhinitis who met the criteria were randomly divided into 2 groups: control group and experimental group. The control group was only given medication, whereas the experimental group was given psychological intervention on the basis of the same medication. Cognitive behavioral therapy was used for psychological intervention. After 12 weeks of treatment, Self-Rating Anxiety Scale (SAS), Self-Rating Depression Scale (SDS), and rhinoconjunctivitis quality of life questionnaire (RQLQ) were used to evaluate the changes in anxiety, depression, and quality of life before and after treatment. RESULTS: The SAS and SDS scores of the control group after treatment were lower than those before treatment, and the difference was statistically significant. Similarly, the SAS and SDS scores of the experimental group after treatment were lower than those before treatment with statistically significant difference. In addition, after treatment, the SAS and SDS scores of the experimental group were statistically lower than those of the control group. The results of RQLQ showed that the scores of each dimension in the control group after treatment were lower than those before treatment, and the difference was statistically significant. Similar results were found in the experimental group. After treatment with these 2 different schemes, the RQLQ scores of sleep, nonnasal/eye symptoms, and emotion in the experimental group were statistically lower than those in the control group. CONCLUSION: Drug therapy or drug therapy combined with psychological intervention can alleviate anxiety and depression of patients with persistent moderate-severe allergic rhinitis and improve their quality of life. Moreover, based on the effect of improving mental disorder and quality of life of patients, drug therapy combined with psychological intervention is better than drug treatment alone.