中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (8): 1578-1584.doi: 10.12307/2025.348

• 皮肤粘膜组织构建 skin and mucosal tissue construction • 上一篇    下一篇

压电型机械门控离子通道组件1在大鼠压力性损伤中的作用机制

孙家琪1,2,卞  璐1,史文涛1,吴学潮1,鲁晓杰1,2   

  1. 1江南大学附属中心医院神经外科,江苏省无锡市  214026;2无锡市神经外科研究所,江苏省无锡市  214026
  • 收稿日期:2024-02-21 接受日期:2024-04-28 出版日期:2025-03-18 发布日期:2024-07-05
  • 通讯作者: 鲁晓杰,教授,江南大学附属中心医院神经外科,江苏省无锡市 214026;无锡市神经外科研究所,江苏省无锡市 214026
  • 作者简介:孙家琪,女,1999年生,山东省烟台人,汉族,江南大学无锡医学院在读硕士,主要从事压疮疾病的研究。
  • 基金资助:
    南京市卫生科技发展专项资金项目(重点项目:ZKX21063),项目负责人:史文涛;南京市卫生科技发展专项资金项目(YKK19129),项目负责人:史文涛;国家自然科学基金面上项目(82072791),项目负责人:鲁晓杰

Mechanism of Piezo-type mechanosensitive ion channel component 1 in rat pressure injury 

Sun Jiaqi1, 2, Bian Lu1, Shi Wentao1, Wu Xuechao1, Lu Xiaojie1, 2   

  1. 1Department of Neurosurgery, Central Hospital Affiliated to Jiangnan University, Wuxi 214026, Jiangsu Province, China; 2Institute of Wuxi Neurosurgery, Wuxi 214026, Jiangsu Province, China
  • Received:2024-02-21 Accepted:2024-04-28 Online:2025-03-18 Published:2024-07-05
  • Contact: Lu Xiaojie, Professor, Department of Neurosurgery, Central Hospital Affiliated to Jiangnan University, Wuxi 214026, Jiangsu Province, China; Institute of Wuxi Neurosurgery, Wuxi 214026, Jiangsu Province, China
  • About author:Sun Jiaqi, Master candidate, Department of Neurosurgery, Central Hospital Affiliated to Jiangnan University, Wuxi 214026, Jiangsu Province, China; Institute of Wuxi Neurosurgery, Wuxi 214026, Jiangsu Province, China
  • Supported by:
    Nanjing Health Science and Technology Development Special Project, Nos. ZKX21063 and YKK19129 (both to SWT); National Natural Science Foundation of China (General Program), No. 82072791 (to LXJ)

摘要:


文题释义:
压力性损伤:是指皮肤和/或皮下组织的局限性损伤,由压力或压力合并剪切力作用所致,通常发生在骨隆突处,也可能与医疗器械或其他物体有关。压力性损伤属于一种慢性创面,已被国际上列为对患者造成严重伤害的五大常见问题之一。
压电型机械门控离子通道组件1(PIEZO1):在人体的不同器官和组织中表达,如大脑、皮肤、骨组织等,在皮肤中高度表达。PIEZO1在细胞中可以响应各种形式的机械刺激,包括压力、拉伸和剪切力等,被激活后通过PIEZO1-YAP-TG2轴调节下游信号和细胞反应,转导机械刺激。PIEZO1作为一种钙离子可渗透的离子通道在机械刺激诱导的钙离子内流中起主要作用,在机械过载下会促进钙离子大量内流,从而引发细胞凋亡。

背景:压力性损伤的发生机制复杂,哪些因素在其发生中起到核心作用,这些因素具体又是如何发生的尚不完全清楚。
目的:探讨压电型机械门控离子通道组件1(piezo-type mechanosensitive ion channel component 1,PIEZO1)与压力性损伤发生的关系。
方法:①细胞实验:采用不同浓度的PIEZO1激动剂Yoda1干预人永生化角质形成细胞(HaCaT),检测细胞活性、钙离子内流及PIEZO1、凋亡相关蛋白的表达。②动物实验:采用随机数字表法将12只SD大鼠随机分为4组,每组3只:对照组大鼠不进行任何处理,1,2,3 mm组分别采用厚度1,2,3 mm的磁铁在大鼠背部两侧压迫1 h,建立压力性损伤模型,造模后切除全部创面组织,分别进行苏木精-伊红、Masson、免疫荧光染色及Western blot检测。
结果与结论:①细胞实验:活/死细胞染色结果显示,随着Yoda1浓度(0,2.5,5,10 μmol/L)的升高,HaCaT细胞凋亡增加;随着Yoda1浓度(0,5,10 μmol/L)的升高,HaCaT细胞钙离子内流增加,并且随着处理时间的延长,钙离子内流增多;Western blot检测结果显示,与对照组(0 μmol/L Yoda1干预)比较,5,10 μmol/L Yoda1干预可提升HaCaT细胞中BAX、TG2、PIEZO1蛋白的表达,降低Bcl-2蛋白的表达;②动物实验:苏木精-伊红与Masson染色结果显示,3个实验组压迫部位皮肤结构被破坏,皮下脂肪液化坏死,胶原蛋白稀疏且排列紊乱,并且随着磁铁厚度(压力)的增加,压迫部位皮肤组织结构破坏程度加重;免疫荧光染色与Western blot检测结果显示,与对照组比较,3个实验组大鼠BAX、TG2、Yap1与PIEZO1蛋白表达升高,Bcl-2蛋白表达降低,并且随着磁铁厚度(压力)的增加,相关蛋白表达值改变更加明显;③结果表明:皮肤受压会激活PIEZO1使钙离子大量内流,随着所受压力的不断增加,最终导致钙超载后的细胞凋亡。

关键词: 压力性损伤, 压电型机械门控离子通道组件1, PIEZO1, 钙超载, HaCaT细胞

Abstract: BACKGROUND: The mechanisms underlying the occurrence of pressure injuries are complex, and it is not entirely clear which factors play a central role in the development of pressure injuries and how these factors operate. 
OBJECTIVE: To investigate the relationship between Piezo-type mechanosensitive ion channel component 1 (Piezo1) and the occurrence of pressure injuries.
METHODS: (1) Cellular experiment: Human immortalized keratinocytes (HaCaT) were treated with Yoda1, a Piezo1 agonist, at different concentrations. Cell viability, calcium ion influx, Piezo1, and apoptosis-related protein expression were detected. (2) Animal experiment: Twelve Sprague-Dawley rats were randomly divided into a control group and three experimental groups, with three rats in each group. The control group was not subjected to pressure, while in the three experimental groups, magnets with a thickness of 1, 2, and 3 mm were used to press on both sides of the rats’ back for 1 hour, respectively, to establish the animal models of pressure injuries. After modeling, all traumatic tissues were excised and subjected to hematoxylin-eosin, Masson, immunofluorescence staining and western blot assay. 
RESULTS AND CONCLUSION: Cellular experiments: The results of live/dead cell staining showed that HaCaT cell apoptosis increased with the increase of Yoda1 concentration (0, 2.5, 5, and 10 μmol/L), and calcium ion influx increased with the increase of Yoda1 concentration (0, 5, and 10 μmol/L), as well as with the prolongation of treatment time. Western blot assay results showed an increase in the expression of BAX, TG2, and PIEZO1 and a decrease in the expression of the expression of Bcl-2 protein in HaCaT cells in 5 and 10 μmol/L Yoda1 groups compared with the control group (0 μmol/L Yoda1). Animal experiments: The results of hematoxylin-eosin and Masson staining showed that the skin structure of the three experimental groups was damaged at the compression site, there was subcutaneous fat liquefaction and necrosis, and collagen was sparse and disorganized, and damage to the skin structure at the compression site was aggravated with the increase of magnet thickness. Immunofluorescence staining and western blot results showed that compared with the control group, the expression of BAX, TG2, Yap1 and PIEZO1 proteins was elevated, and the expression of Bcl-2 proteins was lowered in the three experimental groups. Moreover, the expression of related proteins showed more significant changes with the increase of magnet thickness (pressure). To conclude, skin compression activates Piezo1, leading to a significant influx of calcium ions. As the pressure increases, this ultimately results in cell apoptosis due to calcium overload.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

Key words: pressure injury, Piezo-type mechanosensitive ion channel component 1, PIEZO1, calcium overload, HaCaT cells

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