1.中山大学公共卫生学院,广东 广州 510080
2.广东省营养与健康重点实验室,广东 广州 510080
3.广东省营养转化工程技术研究中心,广东 广州 510080
4.中山大学公共卫生学院(深圳),广东 深圳 518000
5.中山大学附属肿瘤防治中心病案统计科,广东 广州510060
6.广州市妇女儿童医疗中心耳鼻喉科,广东 广州 510623
郭兴悦,硕士生,研究方向:膳食营养素防治过敏性气道炎症,E-mail:guoxy57@mail2.sysu.edu.cn
收稿:2021-07-03,
纸质出版:2021-11-20
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郭兴悦,李琴,申云琴等.短期高盐饮食对过敏性哮喘小鼠气道炎症的影响[J].中山大学学报(医学科学版),2021,42(06):864-873.
GUO Xing-yue,LI Qin,SHEN Yun-qin,et al.Effects of Short-term High-salt Diet on Airway Inflammation in Mice with Allergic Asthma[J].Journal of Sun Yat-sen University(Medical Sciences),2021,42(06):864-873.
郭兴悦,李琴,申云琴等.短期高盐饮食对过敏性哮喘小鼠气道炎症的影响[J].中山大学学报(医学科学版),2021,42(06):864-873. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2021.0622.
GUO Xing-yue,LI Qin,SHEN Yun-qin,et al.Effects of Short-term High-salt Diet on Airway Inflammation in Mice with Allergic Asthma[J].Journal of Sun Yat-sen University(Medical Sciences),2021,42(06):864-873. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2021.0622.
目的
2
探讨短期高盐饮食对过敏性哮喘小鼠气道炎症的影响。
方法
2
20只4 周龄雌性 BALB/c 小鼠随机分为 4 组,即正常对照组、过敏性哮喘模型组、4%高盐饮食组和8%高盐饮食组。卵清蛋白 (OVA) 致敏和激发建立过敏性哮喘模型,正常组和模型组给予普通饲料和饮水,高盐饮食组分别给予4%和8%的高盐饲料以及1%的盐水。25 d后,在最后一次激发时观察各组小鼠的鼻部症状,24 h后处死小鼠。五分类血细胞分析测定全血中各亚型炎症细胞,苏木精-伊红(HE)染色观察肺部嗜酸性粒细胞浸润情况,过碘酸-雪夫(PAS)染色观察肺组织杯状细胞增生情况,流式细胞术检测肺组织中辅助性T 细胞1(Th1细胞)、Th2、Th17细胞和调节性T细胞(Treg细胞)比例,酶联免疫吸附法(ELISA)测定肺泡灌洗液(BALF)中的细胞因子白介素-4(IL-4)、IL-5、IL-13和IL-17的水平。
结果
2
与过敏性哮喘模型组相比,4%与8%高盐饮食均可以显著降低过敏性哮喘小鼠血嗜酸性粒细胞比例、肺组织Th17细胞比例以及BALF中IL-13与IL-17的水平,但8%高盐饮食降低IL-13水平的效果比4%高盐饮食更明显(
P
<
0.05);而仅有8%高盐饮食可显著缓解过敏性哮喘小鼠鼻部症状,改善肺组织嗜酸性粒细胞浸润以及杯状细胞增生情况,降低肺组织Th2细胞比例和Th2/ Th1比值,减少BALF中细胞因子 IL-4和IL-5的表达水平(
P
<
0.05)。
结论
2
短期高盐饮食可缓解过敏性哮喘小鼠的气道炎症,且8%高盐饮食改善效果优于4%高盐饮食。
Objective
2
To explore the effects of high-salt diet on airway inflammation in mice with allergic asthma.
Methods
2
Twenty 4-week-old female BALB/c mice were randomly divided into four groups, including control group, allergic asthma model group, 4% high-salt diet group and 8% high-salt diet group. Ovalbumin(OVA)was injected intraperitoneally and inhaled to make an asthmatic model. The control group and the model group were fed ordinary diet and drinking water, and the high-salt groups were fed 4% or 8% high-salt diet and 1% saline respectively. After 25 days, the nasal symptoms of each group of mice were observed at the last challenge. The mice were sacrificed 24 hours later. The inflammatory cells of different subtype in the blood were measured by five classification of blood cell analysis. Hematoxylin-eosin (HE) staining was used to observe the infiltration of eosinophils, and periodic acid-schiff (PAS) staining was used to observe the goblet cell proliferation in the lung tissue. Flow cytometry was used to detect the proportion of helper T cells 1(Th1 cells), Th2, Th17 cells and regulatory T cells (Treg cells) in the lung tissue, and the enzyme-linked immunosorbent assay was used to determine the levels of cytokines interleukin-4 (IL-4), IL-5, IL-13, and IL-17 of bronchoalveolar lavage fluid (BALF).
Results
2
Compared with the allergic asthma model group, 4% and 8% high-salt diet significantly reduced the proportion of eosinophils in blood, the proportion of Th17 cells in lung tissue, and IL-13 and IL-17 levels in BALF, but he effect of 8% high-salt diet on IL-13 was more significant than that of 4% high-salt diet (
P
<
0.05). However, only 8% high-salt diet significantly relieved nasal symptom, improved eosinophil infiltration and goblet cell proliferation, reduced the proportion of Th2 cells and Th2/ Th1 ratio in lung tissue and the levels of IL-4 and IL-5 in BALF (
P
<
0.05).
Conclusions
2
Short-term high-salt diet can alleviate airway inflammation in mice with allergic asthma, and the effects of 8% high-salt diet are better than that of 4% high-salt diet.
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