PMID- 25590304 OWN - NLM STAT- MEDLINE DCOM- 20151014 LR - 20181202 IS - 1945-8932 (Electronic) IS - 1945-8932 (Linking) VI - 29 IP - 1 DP - 2015 Jan-Feb TI - Serum level of interleukin-21 is elevated in chronic rhinosinusitis. PG - e1-6 LID - 10.2500/ajra.2015.29.4117 [doi] AB - BACKGROUND: Chronic rhinosinusitis (CRS) is an inflammatory disease of the sinuses and mucosa with unclear pathogenesis. Interleukin (IL)-21 is mainly expressed in activated cluster of differentiation (CD)4(+) T cells and has potent regulatory effects on the immune system. OBJECTIVE: This study is to determine whether IL-21 in the blood is correlated with CRS. METHODS: The blood samples from CRS patients and normal controls were analyzed in correlation with clinical features. The eosinophil percentage was counted, and serum levels of total immunoglobulin E (IgE) and IL-21 were analyzed by enzyme-linked immunosorbent assay (ELISA). In addition, IL-21 and interferon (IFN)-gamma secreted from stimulated peripheral blood mononuclear cells (PBMCs) were measured by ELISA, and their mRNA expression levels were analyzed by real-time quantitative polymerase chain reaction (RT-qPCR). Disease severity was scored based on computed tomography (CT) scan, nasal endoscopy, and global osteitis scoring scale (GOSS). RESULTS: A total of 55 CRS and 37 healthy subjects were recruited. The average levels of serum total IgE were 20 kU/L in normal group, 290 kU/L in CRS with nasal polys (CRSwNP), and 187 kU/L in CRS without nasal polys (CRSsNP). IL-21 levels were 28 pg/mL in normal group, 54 pg/mL in CRSwNP, and 71 pg/mL in CRSsNP. Both IgE and IL-21 were significantly elevated in both CRS patient subgroups. However, no significant difference was found between these two patient subgroups. The serum IL-21 levels correlated well with the disease severity in the patients. In addition, the secreted IL-21 was enhanced significantly in the patient's PBMCs stimulated by phytohemagglutin (PHA). CONCLUSION: IL-21 could be a target for diagnosis and treatment of CRS. FAU - Chao, Pin-Zhir AU - Chao PZ AD - Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan. FAU - Hsieh, Ming-Shium AU - Hsieh MS FAU - Lee, Fei-Peng AU - Lee FP FAU - Chen, Shao-Yi AU - Chen SY FAU - Cheng, Chao-Wen AU - Cheng CW FAU - Chang, Hui-Wen AU - Chang HW FAU - Lin, Yun-Tien AU - Lin YT FAU - Ting, Lai-Lei AU - Ting LL FAU - Lin, Yung-Feng AU - Lin YF FAU - Chen, Chien-Ho AU - Chen CH LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Rhinol Allergy JT - American journal of rhinology & allergy JID - 101490775 RN - 0 (Interleukins) RN - 37341-29-0 (Immunoglobulin E) RN - 82115-62-6 (Interferon-gamma) RN - MKM3CA6LT1 (interleukin-21) SB - IM MH - Adult MH - Case-Control Studies MH - Chronic Disease MH - Female MH - Humans MH - Immunoglobulin E/blood MH - Interferon-gamma/biosynthesis MH - Interleukins/*blood MH - Male MH - Middle Aged MH - Rhinitis/*immunology MH - Sinusitis/*immunology EDAT- 2015/01/16 06:00 MHDA- 2015/10/16 06:00 CRDT- 2015/01/16 06:00 PHST- 2015/01/16 06:00 [entrez] PHST- 2015/01/16 06:00 [pubmed] PHST- 2015/10/16 06:00 [medline] AID - 10.2500/ajra.2015.29.4117 [doi] PST - ppublish SO - Am J Rhinol Allergy. 2015 Jan-Feb;29(1):e1-6. doi: 10.2500/ajra.2015.29.4117.