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1.400014 重庆,重庆医科大学附属儿童医院呼吸内科,国家儿童健康与疾病临床医学研究中心,儿童发育疾病研究教育部重点实验室,儿童发育重大疾病国家国际科技合作基地,儿童代谢与炎症性疾病重庆市重点实验室
2.330108 南昌,重庆医科大学附属儿童医院江西医院
[彭东红,E-mail:pdhdxy@163.comPENG Donghong, E-mail: pdhdxy@163.com
收稿:2024-01-04,
修回:2024-02-16,
纸质出版:2024-06-30
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李熙炫, 彭东红. NaNO2对HDM预处理的气道上皮细胞氧化损伤的影响及其机制[J]. 陆军军医大学学报, 2024,46(12):1395-1402.
Xixuan LI, Donghong PENG. Effect of NaNO2 on oxidative damage in house dust mite pretreated airway epithelial cells and its underlying mechanism[J]. Journal of Army Medical University, 2024, 46(12): 1395-1402.
李熙炫, 彭东红. NaNO2对HDM预处理的气道上皮细胞氧化损伤的影响及其机制[J]. 陆军军医大学学报, 2024,46(12):1395-1402. DOI: 10.16016/j.2097-0927.202401018.
Xixuan LI, Donghong PENG. Effect of NaNO2 on oxidative damage in house dust mite pretreated airway epithelial cells and its underlying mechanism[J]. Journal of Army Medical University, 2024, 46(12): 1395-1402. DOI: 10.16016/j.2097-0927.202401018.
目的
2
探究NaNO
2
对经屋尘螨(house dust mite
HDM)预处理的人支气管上皮细胞氧化损伤的影响及其机制。
方法
2
体外培养人支气管上皮细胞16HBE
经HDM预处理后用不同浓度NaNO
2
染毒处理
CCK-8检测细胞存活率
确定NaNO
2
最适浓度及处理时间; 将细胞接种于6孔板中随机分为3组(
n
=3): 正常对照组、HDM组(HDM预处理)、NaNO
2
组(HDM预处理后进行NaNO
2
染毒处理)。Western blot和RT-PCR检测各组细胞Krüppel样锌指转录因子2(Krüppel-like transcription factors 2
KLF2)、低氧诱导因子-1α(hypoxia inducible factor-1α
HIF-1α)和Notch1的表达水平; ELISA法检测细胞炎症因子白介素-6(interleukin-6
IL-6)和肿瘤坏死因子-α(tumor necrosis factor
TNF-α)的表达水平; 荧光探针法检测细胞活性氧(reactive oxygen species
ROS)水平; 微量法测定丙二醛(malondialdehyde
MDA)与谷胱甘肽(glutathione
GSH)含量。
结果
2
CCK-8实验确定NaNO
2
最适干预方式为500 μmol/L处理24 h。与正常对照组比较
HDM组KLF2蛋白和mRNA水平减少
HIF-1α蛋白和mRNA水平(
P
<
0.01)、Notch1的蛋白(
P
<
0.05)、mRNA水平和ROS含量升高(
P
<
0.01)
MDA、TNF-α和IL-6含量均增高
GSH含量降低(
P
<
0.05);与HDM组比较
NaNO
2
组KLF2蛋白和mRNA水平明显减少
HIF-1α蛋白和mRNA水平(
P
<
0.01)、Notch1的蛋白(
P
<
0.05)和mRNA水平、ROS含量显著升高(
P
<
0.01)
MDA (
P
<
0.05)、TNF-α(
P
<
0.001)和IL-6含量显著增高
GSH含量明显减少(
P
<
0.05)。
结论
2
NaNO
2
可能通过调控KLF2的表达加重HDM诱导的人支气管上皮细胞氧化应激损伤。
Objective
2
To investigate the effects and underlying mechanisms of NaNO
2
on oxidative damage in human bronchial epithelial cells pretreated with house dust mite (HDM).
Methods
2
Human bronchial epithelial cell line 16HBE were pretreated with HDM and then exposed to varying concentrations of NaNO
2
.Cell viability was assessed using CCK-8 assay to determine the optimal concentration and treatment duration of NaNO
2
.Then 16HBE cells were randomly divided into normal control group
HDM group (pretreated with HDM)
and NaNO
2
group (pretreated with HDM followed by NaNO
2
exposure).The expression of Krüppel-like transcription factors 2(KLF2)
hypoxia-inducible factor-1α(HIF-1α)
and Notch1 at protein and mRNA levels in each group were measured by Western blotting and RT-PCR
respectively.The contents of the inflammatory cytokines IL-6 and TNF-α were assessed using ELISA.The production of reactive oxygen species (ROS) were measured using a fluorescence probe detection.The contents of malondialdehyde (MDA) and glutathione (GSH) were quantified by micro-methods.
Results
2
CCK-8 assay determined that the optimal intervention of NaNO
2
was 500 μmol/L for 24 h.Compared with the normal control group
the HDM group showed reduced protein and mRNA expression of KLF2
but increased protein and mRNA (
P
<
0.01) expression of HIF-1α
and Notch1 at protein (
P
<
0.05) and mRNA levels
elevated production of ROS (
P
<
0.01)
and increased contents of MDA
TNF-α
and IL-6
with a decrease in GSH content (
P
<
0.05).Compared with the HDM group
the NaNO
2
group exhibited a significant reduction in KLF2 protein and mRNA levels
increases in HIF-1α protein and mRNA levels
Notch1 protein (
P
<
0.05) and mRNA levels
elevated ROS content (
P
<
0.01)
and significantly increased contents of MDA
TNF-α(
P
<
0.001)
and IL-6
with a notable decrease in GSH content (
P
<
0.05).
Conclusion
2
NaNO
2
may exacerbate HDM-induced oxidative stress injury in human bronchial epithelial cells by regulating the expression of KLF2.
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