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中华细胞与干细胞杂志(电子版) ›› 2023, Vol. 13 ›› Issue (03) : 129 -136. doi: 10.3877/cma.j.issn.2095-1221.2023.03.001

论著

LncRNA CRNDE通过miR-181a-5p/SOX6轴调节脂多糖诱导人肺泡上皮细胞的炎症反应和细胞凋亡
邓春文, 陈嵩(), 钟裴, 闵师强, 万健   
  1. 201299,上海市浦东新区人民医院急诊与重症医学科
  • 收稿日期:2023-01-16 出版日期:2023-06-01
  • 通信作者: 陈嵩
  • 基金资助:
    浦东新区科技发展基金民生科研专项(PKJ2020-Y43)

LncRNA CRNDE regulates lipopolysaccharide-induced inflammatory response and apoptosis in human alveolar epithelial cells via miR-181a-5p/SOX6 axis

Chunwen Deng, Song Chen(), Pei Zhong, Shiqiang Min, Jian Wan   

  1. Department of Emergency and Critical Care Medicine, Shanghai Pudong New Area People's Hospital, Shanghai 201299, China
  • Received:2023-01-16 Published:2023-06-01
  • Corresponding author: Song Chen
引用本文:

邓春文, 陈嵩, 钟裴, 闵师强, 万健. LncRNA CRNDE通过miR-181a-5p/SOX6轴调节脂多糖诱导人肺泡上皮细胞的炎症反应和细胞凋亡[J]. 中华细胞与干细胞杂志(电子版), 2023, 13(03): 129-136.

Chunwen Deng, Song Chen, Pei Zhong, Shiqiang Min, Jian Wan. LncRNA CRNDE regulates lipopolysaccharide-induced inflammatory response and apoptosis in human alveolar epithelial cells via miR-181a-5p/SOX6 axis[J]. Chinese Journal of Cell and Stem Cell(Electronic Edition), 2023, 13(03): 129-136.

目的

探索长链非编码RNA (LncRNA)CRNDE通过微小RNA-181a-5p (miR-181a-5p)/转录因子性别决定区Y-box 6 (SOX6)轴对脂多糖(LPS)诱导人肺泡上皮细胞炎症反应和细胞凋亡的影响。

方法

将所有质粒和寡核苷酸分别转染A549细胞,并进行LPS处理,并以未经处理的A549细胞为对照。qRT-PCR检测细胞中CRNDE、miR-181a-5p以及SOX6 mRNA的表达水平;流式细胞仪、ELISA法检测细胞凋亡及肿瘤坏死因子-α (TNF-α)、炎症因子白细胞介素-1β (IL-β)和IL-6水平;双荧光素酶实验分别验证CRNDE和miR-181a-5p以及miR-181a-5p与SOX6的靶向关系;Western blot检测磷酸化(p)-核因子κB (NF-κB) p65/NF-κB p65、SOX6、活化的半胱氨酸天冬氨酸酶3 (cleaved caspase-3)的表达水平。两组间比较采用独立样本t检验;各组数据均满足正态分布,当方差齐时采用单因素方差分析,进一步两组间比较采用SNK-q检验,方差不齐时采用Games-Howell法检验。

结果

与对照比较,LPS的细胞凋亡率[(41.11 ± 4.11)%比(6.11 ± 0.61)%]、TNF-α [(353.21 ± 35.31)比(200.15 ± 20.02)pg/mg]、IL-1β [(286.91 ± 28.71)比(35.76 ± 3.58)pg/mg]、IL-6[(642.31 ± 64.23)比(32.64 ± 3.26)pg/mg]、CRNDE (0.66 ± 0.06比0.33 ± 0.03)、SOX6 (0.68 ± 0.06比0.28 ± 0.03)、cleaved caspase-3 (0.76 ± 0.07比0.24 ± 0.02)、p-NF-κB p65/NF-κB p65 (0.85 ± 0.08比0.26 ± 0.03)升高,miR-181a-5p表达(0.32 ± 0.03比0.64 ± 0.06)降低(P < 0.05);与si-NC组相比,干扰CRNDE降低LPS诱导细胞的凋亡率[(15.58 ± 1.55)%比(41.09 ± 4.09)%]、TNF-α[(200.15 ± 20.02)比(356.51 ± 35.65)pg/mg]、IL-1β[(99.32 ± 9.94)比(288.88 ± 28.89 ) pg/mg]、IL-6[(211.34 ± 21.14)比(639.89 ± 63.99)pg/mg]、CRNDE(0.35 ± 0.03比0.65 ± 0.06)、SOX6 (0.39 ± 0.04比0.64 ± 0.07)的表达(P < 0.05),干扰SOX6降低LPS诱导细胞的凋亡率[(15.34 ± 1.53)%比(41.09 ± 4.09)%]、TNF-α[(192.37 ± 19.24)比(356.51 ± 35.65)pg/mg]、IL-1β [(100.02 ± 10.01)比(288.88 ± 28.89)pg/mg]、IL-6[(204.86 ± 20.49)比(639.89 ± 63.99)pg/mg]、SOX6 (0.36 ± 0.03比0.64 ± 0.07)的表达(P < 0.05);与miR-NC相比,过表达miR-181a-5p降低LPS诱导细胞的凋亡率[(15.34 ± 1.53)%比(40.89 ± 4.09)%]、TNF-α [(189.45 ± 19.01)比(356.68 ± 35.67)pg/mg]、IL-1β[(95.37 ± 9.54)比(288.67 ± 28.87) pg/mg]、IL-6[(209.84 ± 20.98)比(637.93 ± 63.81)pg/mg]水平,miR-181a-5p (0.55 ± 0.05比0.35 ± 0.03)表达增加(P < 0.05)。抑制miR-181a-5p表达可逆转干扰CRNDE对LPS诱导A549细胞的保护作用;上调SOX6可逆转干扰CRNDE、过表达miR-181a-5p对LPS诱导A549细胞的保护作用。

结论

干扰CRNDE可以抑制LPS诱导A549细胞的炎症反应和细胞凋亡,可能与调控miR-181a-5p/SOX6轴有关。

Objective

To explore the effects of long non-coding RNA (lncRNAs) CRNDE on lipopolysaccharide (LPS) -induced inflammatory response and apoptosis of human alveolar epithelial cells via the microRNA-181a-5p (miR-181a-5p) /transcription factor sex-determining region Y-box 6 (SOX6) axis.

Methods

All plasmids and oligonucleotides were transfected into A549 cells and treated with LPS. Untreated A549 cells were used as the control. QRT-PCR was performed to detect the expression levels of CRNDE, miR-181a-5p and SOX6 mRNA in cells; flow cytometry and ELISA were performed to detect cell apoptosis and the levels of tumor necrosis factor-α (TNF-α) , inflammatory factors interleukin-1β (IL-1β) and IL-6; dual luciferase experiment was performed to verify the targeting relationship between CRNDE and miR-181a-5p, and the relationship between miR-181a-5p and SOX6; Western blot was performed to detect the expression levels of phosphorylated (p) -nuclear factor κB (NF-κB) p65/NF-κB p65, SOX6 and cleaved caspase-3.

Results

Compared with the control, the apoptosis rate (41.11%± 4.11%) vs (6.11% ± 0.61%) , TNF-α (353.21 ± 35.31) vs (200.15 ± 20.02) pg/mg, IL-1β (286.91 ± 28.71) vs (35.76 ± 3.58) pg/mg, IL-6 (642.31 ± 64.23 vs 32.64 ± 3.26) pg/mg, the expression of CRNDE (0.66 ± 0.06 vs 0.33 ± 0.03) , SOX6 (0.68 ± 0.06 vs 0.28 ± 0.03) , cleaved caspase-3 (0.76 ± 0.07 vs 0.24 ± 0.02) , p-NF-κB p65/NF-κB p65 (0.85 ± 0.08 vs 0.26 ± 0.03) were visibly raised in the LPS group, and the expression of miR-181a-5p (0.32 ± 0.03 vs 0.64 ± 0.06) was visibly decreased (P < 0.05) ; Compared with the si-NC group, knockdown CRNDE decreased the apoptosis rate (15.58%± 1.55% vs 41.09%± 4.09%) , TNF-α[ (200.15 ± 20.02) vs (356.51 ± 35.65) pg/mg], IL-1β[ (99.32 ± 9.94) vs (288.88 ± 28.89) pg/mg], IL-6[ (211.34 ± 21.14) vs (639.89 ± 63.99) pg/mg], CRNDE (0.35 ± 0.03 vs 0.65 ± 0.06) , SOX6 (0.39 ± 0.04 vs 0.64 ± 0.07) induced by LPS (P < 0.05) , Knockdown SOX6 inhibited the apoptosis rate (15.34%± 1.53% vs 41.09%± 4.09%) , TNF-α[ (192.37 ± 19.24) vs (356.51 ± 35.65) pg/mg], IL-1β[ (100.02 ± 10.01) vs (288.88 ± 28.89) pg/mg]. The expression of IL-6[(204.86 ± 20.49) vs (639.89 ± 63.99) pg/mg], SOX6 (0.36 ± 0.03 vs 0.64 ± 0.07) induced by LPS (P < 0.05) ; Compared with miR-NC, overexpression of miR-181a-5p reduced apoptosis (15.34%± 1.53% vs 40.89%± 4.09%) , TNF-α[ (189.45 ± 19.01) vs (356.68 ± 35.67) pg/mg], IL-1β[ (95.37 ± 9.54) vs (288.67 ± 28.8 7) pg/mg], IL-6[ (209.84 ± 20.98) vs (637.93 ± 63.81) pg/mg]induced by LPS, and the expression of miR-181a-5p (0.55 ± 0.05 vs 0.35 ± 0.03) was significantly increased (P < 0.05) ; inhibiting the expression of miR-181a-5p could reverse the protective effect of CRNDE on LPS-induced A549 cells; up-regulation of SOX6 could reverse the protective effects of CRNDE interference and miR-181a-5p overexpression on LPS-induced A549 cells.

Conclusion

Interfering with CRNDE could inhibit the inflammatory response and apoptosis of A549 cells induced by LPS, which may be related to the regulation of the miR-181a-5p/SOX6 axis.

表1 qRT-PCR引物序列信息
表2 比较CRNDE、miR-181a-5p以及SOX6 mRNA表达( ± s
图1 流式细胞术检测细胞凋亡注:a ~ g图分别为对照、LPS、LPS+si-NC、LPS+si-CRNDE、LPS+si-SOX6、miR-NC、LPS+miR-181a-5p
表3 分别干扰CRNDE、SOX6对LPS诱导的细胞凋亡、炎症因子以及CRNDE表达的影响( ± s
表4 上调miR-181a-5p对细胞凋亡、炎症因子以及miR-181a-5p表达的影响( ± s
图2 Western blot检测各组细胞p-NF-κB p65、NF-κB p65、SOX6、cleaved caspase-3蛋白表达注:1为对照;2为LPS;3为LPS+si-NC;4为LPS+si-CRNDE;5为LPS+si-SOX6;6为LPS+miR-NC;7为LPS+miR-181a-5p
表5 分别干扰CRNDE、SOX6或上调miR-181a-5p对相关蛋白表达的影响( ± s
图3 Western blot检测各组细胞p-NF-κB p65、NF-κB p65、SOX6和cleaved caspase-3蛋白表达注:1为LPS+si-CRNDE+anti-miR-NC;2为LPS+si-CRNDE+anti-miR-181a-5p;3为LPS+si-CRNDE+oe-NC;4为LPS+si-CRNDE+oe-SOX6;5为LPS+miR-181a-5p+oe-NC;6为LPS+miR-181a-5p+oe-SOX6
图4 流式细胞术检测细胞凋亡注:a ~ f图分别为LPS+si-CRNDE+anti-miR-NC、LPS+si-CRNDE+anti-miR-181a-5p、LPS+si-CRNDE+oe-NC、LPS+si-CRNDE+oe-SOX6、LPS+miR-181a-5p+oe-NC、LPS+miR-181a-5p+oe-SOX6
表6 抑制miR-181a-5p可逆转干扰CRNDE对LPS诱导A549细胞凋亡、炎症因子的影响( ± s
表7 过表达SOX6可逆转干扰CRNDE对LPS诱导A549细胞凋亡、炎症因子的影响( ± s
表8 上调SOX6可逆转过表达miR-181a-5p对细胞凋亡、炎症因子的影响( ± s
图5 LncBase Predicted v.2预测CRNDE与miR-181a-5p的关系
表9 LncBase Predicted v.2预测及靶向验证CRNDE与miR-181a-5p的关系
图6 Targetscan预测SOX6与miR-181a-5p的结合位点
表10 验证SOX6与miR-181a-5p的靶向关系( ± s
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