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Oleoylethanolamide induces eosinophilic airway inflammation in bronchial asthma
Experimental & Molecular Medicine ( IF 12.8 ) Pub Date : 2021-06-02 , DOI: 10.1038/s12276-021-00622-x
Eun-Kyung Kwon 1 , Youngwoo Choi 2 , Il-Hee Yoon 3 , Ha-Kyeong Won 4 , Soyoon Sim 2 , Hee-Ra Lee 5 , Hyoung Su Kim 6 , Young-Min Ye 2 , Yoo Seob Shin 2 , Hae-Sim Park 2 , Ga-Young Ban 1, 7
Affiliation  

Asthma is a chronic eosinophilic inflammatory disease with an increasing prevalence worldwide. Endocannabinoids are known to have immunomodulatory biological effects. However, the contribution of oleoylethanolamide (OEA) to airway inflammation remains to be elucidated. To investigate the effect of OEA, the expression of proinflammatory cytokines was measured by RT-qPCR and ELISA in airway epithelial (A549) cells. The numbers of airway inflammatory cells and cytokine levels in bronchoalveolar lavage fluid, airway hyperresponsiveness, and type 2 innate lymphoid cells (ILC2s) were examined in BALB/c mice after 4 days of OEA treatment. Furthermore, eosinophil activation after OEA treatment was evaluated by measuring cellular CD69 levels in eosinophils from human peripheral eosinophils using flow cytometry. OEA induced type 2 inflammatory responses in vitro and in vivo. OEA increased the levels of proinflammatory cytokines, such as IL-6, IL-8, and IL-33, in A549 cells. In addition, it also induced eosinophilic inflammation, the production of IL-4, IL-5, IL-13, and IL-33 in bronchoalveolar lavage fluid, and airway hyperresponsiveness. OEA increased the numbers of IL-5- or IL-13-producing ILC2s in a mouse model. Finally, we confirmed that OEA increased CD69 expression (an eosinophil activation marker) on purified eosinophils from patients with asthma compared to those from healthy controls. OEA may play a role in the pathogenesis of asthma by activating ILC2s and eosinophils.



中文翻译:

油酰乙醇酰胺在支气管哮喘中诱导嗜酸性气道炎症

哮喘是一种慢性嗜酸性粒细胞炎性疾病,在世界范围内的患病率不断增加。已知内源性大麻素具有免疫调节生物学作用。然而,油酰乙醇酰胺(OEA)对气道炎症的贡献仍有待阐明。为了研究 OEA 的作用,通过 RT-qPCR 和 ELISA 测量气道上皮 (A549) 细胞中促炎细胞因子的表达。在 OEA 治疗 4 天后,在 BALB/c 小鼠中检查了支气管肺泡灌洗液中气道炎症细胞的数量和细胞因子水平、气道高反应性和 2 型先天淋巴细胞 (ILC2s)。此外,通过使用流式细胞术测量来自人外周嗜酸性粒细胞的嗜酸性粒细胞中的细胞 CD69 水平来评估 OEA 治疗后的嗜酸性粒细胞活化。OEA 在体外和体内诱导 2 型炎症反应。OEA 增加了 A549 细胞中促炎细胞因子的水平,例如 IL-6、IL-8 和 IL-33。此外,它还诱导嗜酸性炎症、支气管肺泡灌洗液中 IL-4、IL-5、IL-13 和 IL-33 的产生以及气道高反应性。OEA 增加了小鼠模型中产生 IL-5 或 IL-13 的 ILC2 的数量。最后,我们证实与健康对照组相比,OEA 增加了哮喘患者纯化嗜酸性粒细胞上 CD69 表达(嗜酸性粒细胞活化标志物)。OEA 可能通过激活 ILC2 和嗜酸性粒细胞在哮喘发病机制中发挥作用。支气管肺泡灌洗液中 IL-4、IL-5、IL-13 和 IL-33 的产生和气道高反应性。OEA 增加了小鼠模型中产生 IL-5 或 IL-13 的 ILC2 的数量。最后,我们证实与健康对照组相比,OEA 增加了哮喘患者纯化嗜酸性粒细胞上 CD69 表达(嗜酸性粒细胞活化标志物)。OEA 可能通过激活 ILC2 和嗜酸性粒细胞在哮喘发病机制中发挥作用。支气管肺泡灌洗液中 IL-4、IL-5、IL-13 和 IL-33 的产生和气道高反应性。OEA 增加了小鼠模型中产生 IL-5 或 IL-13 的 ILC2 的数量。最后,我们证实与健康对照组相比,OEA 增加了哮喘患者纯化嗜酸性粒细胞上 CD69 表达(嗜酸性粒细胞活化标志物)。OEA 可能通过激活 ILC2 和嗜酸性粒细胞在哮喘发病机制中发挥作用。

更新日期:2021-06-02
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