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Differential effects of Th17 cytokines during the response of neutrophils to Burkholderia cenocepacia outer membrane protein A.
Central European Journal of Immunology ( IF 1.5 ) Pub Date : 2020-01-20 , DOI: 10.5114/ceji.2019.92800
Soad Nady 1 , Mona Abdel-Rahman 1 , Silvia A Sousa 2 , Jorge H LEITãO 2 , Mostafa Morad 1 , Rehab E El-Hennamy 1
Affiliation  

T helper 17 cells are involved in the immunopathology of cystic fibrosis. They play a key role in recruitment of neutrophils, which is the first line of defence against bacteria. Additionally, Burkholderia cenocepacia outer membrane protein A (OmpA) BCAL2958 is considered a potential protective epitope for vaccine development. The present study aimed to investigate the neutrophil response to OmpA in the presence of Th17 cytokines, IL-17 and IL-22 at different times of activation. Neutrophils were isolated from whole blood of healthy volunteers and activated with OmpA in the presence of IL-17, IL-22 or both cytokines together. Supernatant was collected after 1 h, 2 h, 4 h, 8 h, and 12 h. Neutrophil activation was assessed by measuring MPO, TNF-α, elastase, hydrogen peroxide, catalase and NO. The results revealed that the combination of IL-17 and IL-22 cytokines induced the release of NE, catalase, H2O2 and TNF-α from neutrophils activated with Burkholderia OmpA at late stages of activation. However, IL-22 alone or IL-17 alone decreased the myeloperoxidase (MPO), catalase and NE levels at early stages of neutrophil activation. The presence of IL-17 alone led to a significant increase in TNF-α level after 1 h and 12 h. However, the presence of IL-22 alone led to a significant increase in TNF-α level after only 1 h but a significant decrease after 8 h of activation was observed as compared to OmpA stimulated neutrophils. In conclusion, Th17 cytokines IL-17 and IL-22, have differential effects during the neutrophil response to Burkholderia OmpA.

中文翻译:

Th17细胞因子在嗜中性白细胞对伯克霍尔德菌新陈代谢外膜蛋白A的反应中的差异作用。

T辅助细胞17参与囊性纤维化的免疫病理学研究。它们在中性粒细胞募集中起关键作用,中性粒细胞是抵抗细菌的第一道防线。另外,伯克霍尔德菌新菌外膜蛋白A(OmpA)BCAL2958被认为是疫苗开发的潜在保护性表位。本研究旨在研究在激活的不同时间存在Th17细胞因子,IL-17和IL-22时,中性粒细胞对OmpA的反应。从健康志愿者的全血中分离出嗜中性粒细胞,并在存在IL-17,IL-22或两种细胞因子的情况下用OmpA激活。1小时,2小时,4小时,8小时和12小时后收集上清液。通过测量MPO,TNF-α,弹性蛋白酶,过氧化氢,过氧化氢酶和NO来评估中性粒细胞的活化。结果显示,IL-17和IL-22细胞因子的组合诱导了Burkholderia OmpA活化的中性粒细胞在活化后期释放NE,过氧化氢酶,H2O2和TNF-α。然而,在嗜中性粒细胞活化的早期,单独的IL-22或单独的IL-17会降低髓过氧化物酶(MPO),过氧化氢酶和NE水平。单独存在IL-17会在1小时和12小时后导致TNF-α水平显着增加。然而,与OmpA刺激的嗜中性粒细胞相比,仅IL-22的存在仅在1小时后导致TNF-α水平显着增加,但在激活8小时后观察到显着降低。总之,Th17细胞因子IL-17和IL-22在嗜中性粒细胞对伯克霍尔德氏菌OmpA的反应中具有不同的作用。伯克霍尔德氏菌OmpA在活化后期将中性粒细胞的H2O2和TNF-α活化。然而,在嗜中性粒细胞活化的早期,单独的IL-22或单独的IL-17会降低髓过氧化物酶(MPO),过氧化氢酶和NE水平。单独存在IL-17会在1小时和12小时后导致TNF-α水平显着增加。然而,与OmpA刺激的嗜中性粒细胞相比,仅IL-22的存在仅在1小时后导致TNF-α水平显着增加,但在激活8小时后观察到显着降低。总之,Th17细胞因子IL-17和IL-22在嗜中性粒细胞对伯克霍尔德氏菌OmpA的反应中具有不同的作用。伯克霍尔德氏菌OmpA在活化后期将中性粒细胞的H2O2和TNF-α活化。然而,在中性粒细胞活化的早期阶段,单独的IL-22或单独的IL-17会降低髓过氧化物酶(MPO),过氧化氢酶和NE水平。单独存在IL-17会在1小时和12小时后导致TNF-α水平显着增加。然而,与OmpA刺激的嗜中性粒细胞相比,仅IL-22的存在仅在1小时后导致TNF-α水平显着增加,但在激活8小时后观察到显着降低。总之,Th17细胞因子IL-17和IL-22在嗜中性粒细胞对伯克霍尔德氏菌OmpA的反应中具有不同的作用。单独存在IL-17会在1小时和12小时后导致TNF-α水平显着增加。然而,与OmpA刺激的嗜中性粒细胞相比,仅IL-22的存在仅在1小时后导致TNF-α水平显着增加,但在激活8小时后观察到显着降低。总之,Th17细胞因子IL-17和IL-22在嗜中性粒细胞对伯克霍尔德氏菌OmpA的反应中具有不同的作用。单独存在IL-17会在1小时和12小时后导致TNF-α水平显着增加。然而,与OmpA刺激的嗜中性粒细胞相比,仅IL-22的存在仅在1小时后导致TNF-α水平显着增加,但在激活8小时后观察到显着降低。总之,Th17细胞因子IL-17和IL-22在嗜中性粒细胞对伯克霍尔德氏菌OmpA的反应中具有不同的作用。
更新日期:2020-01-20
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