Zu-Xia Ma1, Xi Tan1, Yang Shen1, Xia Ke1, Yu-Cheng Yang1, Xing-Bo He1, Zhi-Hai Wang1, Yu-Bing Dai2, Su-Ling Hong1, Guo-Hua Hu3. 1. Department of Otolaryngology, The First Affiliated Hospital of Chongqing Medical University, No.1 Youyi Road, Yuzhong District, Chongqing, 400016, China. 2. Department of Otorhinolaryngology, The People's Hospital of Guizhou Province, Guiyang, China. 3. Department of Otolaryngology, The First Affiliated Hospital of Chongqing Medical University, No.1 Youyi Road, Yuzhong District, Chongqing, 400016, China. hghcq@sina.com.
Abstract
OBJECTIVE: Chronic rhinosinusitis (CRS), which includes CRS without nasal polyposis (CRSsNP) and with nasal polyposis (CRSwNP), shows imbalance of helper T cells (Th) and regulatory T cells (Treg). The balance of Th and Treg cells is orchestrated by dendritic cells (DCs). Recent studies show functions of DCs can be regulated by microRNAs (miRNAs or miRs). This study is aimed to investigate miRNAs expression profiles of peripheral blood DCs in CRS. METHODS: Peripheral blood samples of 30 patients with CRS and 7 patients with nasal septum deviation alone were collected. CD14(+) monocytes were isolated from these samples and differentiated into dendritic cells (DCs). Small RNAs were extracted from mature DCs and reversely transcribed into cDNA by Mir-XTM miRNA First-Strand synthesis method. MiRNA microarrays were used for miRNA expression analysis. Microarray results were validated by real-time PCR performed on five top list target genes. RESULTS: MiRNA microarrays showed that DCs from different types of patients have different sets of differential expressed miRNAs when comparing with Controls; they also share 31 commonly changed miRNAs among all three groups of CRS patients. Of these 31 miRNAs, 5 miRNAs were up-regulated and 25 miRNAs were down-regulated in all three types of CRS, while MiR-1290 was down-regulated in CRSsNP but up-regulated in both atopic CRSwNP and non-atopic CRSwNP. CONCLUSIONS: By comparing miRNA gene expression patterns in 3 types of CRS patients, we have been able to identify candidate miRNAs that might mediate the core pathogenesis of CRS through regulating dendritic cells. These miRNAs could serve as potential therapeutic targets for CRS.
OBJECTIVE:Chronic rhinosinusitis (CRS), which includes CRS without nasal polyposis (CRSsNP) and with nasal polyposis (CRSwNP), shows imbalance of helper T cells (Th) and regulatory T cells (Treg). The balance of Th and Treg cells is orchestrated by dendritic cells (DCs). Recent studies show functions of DCs can be regulated by microRNAs (miRNAs or miRs). This study is aimed to investigate miRNAs expression profiles of peripheral blood DCs in CRS. METHODS: Peripheral blood samples of 30 patients with CRS and 7 patients with nasal septum deviation alone were collected. CD14(+) monocytes were isolated from these samples and differentiated into dendritic cells (DCs). Small RNAs were extracted from mature DCs and reversely transcribed into cDNA by Mir-XTM miRNA First-Strand synthesis method. MiRNA microarrays were used for miRNA expression analysis. Microarray results were validated by real-time PCR performed on five top list target genes. RESULTS: MiRNA microarrays showed that DCs from different types of patients have different sets of differential expressed miRNAs when comparing with Controls; they also share 31 commonly changed miRNAs among all three groups of CRSpatients. Of these 31 miRNAs, 5 miRNAs were up-regulated and 25 miRNAs were down-regulated in all three types of CRS, while MiR-1290 was down-regulated in CRSsNP but up-regulated in both atopic CRSwNP and non-atopic CRSwNP. CONCLUSIONS: By comparing miRNA gene expression patterns in 3 types of CRSpatients, we have been able to identify candidate miRNAs that might mediate the core pathogenesis of CRS through regulating dendritic cells. These miRNAs could serve as potential therapeutic targets for CRS.
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