[Different concentrations of specialized pro-resolving mediators in eosinophilic and non-eosinophilic chronic rhinosinusitis with nasal polyps].

Objective: To investigate the difference of concentrations of specialized pro-resolving mediators (SPMs) derived from fatty acids in eosinophilic chronic rhinosinusitis with nasal polyps (ECRSwNP) and non-eosinophilic chronic rhinosinusitis with nasal polyps (nECRSwNP). Methods: A total of 36 patients with bilateral chronic rhinosinusitis with nasal polyps (CRSwNP) who underwent endoscopic nasal surgeries in Peking Union Medical College Hospital from May 2019 to September 2020 were enrolled, including 27 males and 9 females, with the age from 13 to 67 years. There were 23 cases of ECRSwNP and 13 cases of nECRSwNP. At the same time, 12 control subjects were enrolled. The concentrations of multiple SPMs, including lipoxins (LXA4 and LXB4), resolvins (RvD1, RvD2, RvD3, RvD5 and RvE1), protectins (PDX) and maresins (Mar-1) in nasal polyps with different histological subtypes and normal nasal mucosa were analyzed using liquid chromatography-tandem mass spectrometry. The concentrations of SPMs between groups were compared using Mann-Whitney U test. Spearman's rank correlation coefficient was used to measure the correlation between the concentrations of SPMs in nasal polyps and tissue eosinophil counts. Results: The concentrations of RvD2, RvD3, RvD5, LXA4, LXB4, Mar-1 and PDX in ECRSwNP group were significantly higher than that in controls (Z value was -2.276, -2.313, -3.371, -2.094, -2.051, -3.104 and -2.294, respectively, all P<0.05). The concentrations of RvD2, RvD5, Mar-1 and PDX in ECRSwNP group were significantly higher than those in nECRSwNP group (Z value was -2.175, -2.289, -2.243 and -2.124, respectively, all P<0.05). There was no significant difference in all these SPMs between nECRSwNP and controls (all P>0.05). The concentrations of RvD2, RvD3, RvD5, LXB4, Mar-1 and PDX in nasal polyps correlated positively with tissue eosinophil counts (r value was 0.443, 0.436, 0.371, 0.502, 0.340 and 0.386, respectively, all P<0.05). Conclusions: A varienty of SPMs are elevated in ECRSwNP. Dysregulation of fatty acid metabolism might play an important role in the chronic inflammation of ECRSwNP.目的： 探讨脂肪酸衍生的特异性促炎症消退介质（specialized pro-resolving mediators，SPMs）在嗜酸粒细胞性慢性鼻窦炎伴鼻息肉（ECRSwNP）和非嗜酸粒细胞性慢性鼻窦炎伴鼻息肉（nECRSwNP）中的含量差异。 方法： 纳入2019年5月至2020年9月于北京协和医院行鼻内镜手术的双侧慢性鼻窦炎伴鼻息肉（CRSwNP）患者36例进行回顾性分析，其中男性27例，女性9例，年龄13~67岁，包括ECRSwNP组23例，nECRSwNP组13例；同期纳入对照组12例。通过液相色谱串联质谱检测脂氧素（LXA4、LXB4）、消退素（RvD1、RvD2、RvD3、RvD5、RvE1）、保护素（PDX）和巨噬素（Mar-1）多种SPMs在不同病理类型鼻息肉和正常鼻黏膜中的含量。采用Mann-Whitney U检验比较SPMs的组间差异，Spearman相关性检验分析鼻息肉中SPMs含量与组织嗜酸粒细胞计数的相关性。 结果： ECRSwNP组RvD2、RvD3、RvD5、LXA4、LXB4、Mar-1和PDX含量均显著高于对照组（Z值分别为-2.276、-2.313、-3.371、-2.094、-2.051、-3.104、-2.294，P值均<0.05）。ECRSwNP组RvD2、RvD5、Mar-1和PDX含量均显著高于nECRSwNP组（Z值分别为-2.175、-2.289、-2.243、-2.124，P值均<0.05）。以上7种SPMs含量在nECRSwNP组和对照组间的差异均无统计学意义（P值均>0.05）。鼻息肉组织中RvD2、RvD3、RvD5、LXB4、Mar-1、PDX含量均和组织嗜酸粒细胞计数呈显著正相关（r值分别为0.443、0.436、0.371、0.502、0.340、0.386，P值均<0.05）。 结论： 多种SPMs在ECRSwNP中含量增高，脂肪酸代谢紊乱可能在ECRSwNP的慢性炎症中发挥重要作用。.