中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (20): 3186-3190.doi: 10.3969/j.issn.2095-4344.2578

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同一创面不同病程糖尿病足创面组织细胞凋亡率、Bcl-2、Bax及肿瘤坏死因子α的相关性

郑  敏1,殷学利2,黄素群2   

  1. 重庆医科大学附属第二医院,1呼吸与危重症医学科,2急诊科,重庆市  400010
  • 收稿日期:2019-07-25 修回日期:2019-08-01 接受日期:2019-09-17 出版日期:2020-07-18 发布日期:2020-04-13
  • 通讯作者: 黄素群,重庆医科大学附属第二医院急诊科,重庆市 400010
  • 作者简介:郑敏,女,1979年生,重庆市人,汉族,2019年重庆医科大学毕业,硕士,副主任护师,讲师,主要从事急慢性疑难伤口护理研究。
  • 基金资助:
    重庆市渝中区科技计划项目(20150127);重庆医科大学附属第二医院护理骨干科研资助计划项目(2015)

Correlation between apoptosis rate and expression of Bcl-2, Bax and tumor necrosis factor alpha in diabetic foot ulcer with different disease courses

Zheng Min1, Yin Xueli2, Huang Suqun2   

  1. 1Department of Respiratory and Critical Care Medicine, 2Department of Emergency, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
  • Received:2019-07-25 Revised:2019-08-01 Accepted:2019-09-17 Online:2020-07-18 Published:2020-04-13
  • Contact: Huang Suqun, Department of Emergency, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
  • About author:Zheng Min, Master, Associate chief nurse, Lecturer, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
  • Supported by:
    Science and Technology Plan Project of Chongqing Yuzhong District, No. 20150127; Nursing Key Research Project of Chongqing Medical University Second Affiliated Hospital, No. 2015

摘要:

文题释义:

“4C”法:通过颜色(Colour)、毛细血管出血(Capillary bleeding)、收缩力(Contractility)和紧张度(Consistency)判断是否坏死的方法。一般认为组织呈现暗紫/黄/白色、质地软、切割不出血和刺激无收缩状态,为坏死指征,在临床清创时应被清除。

细胞凋亡:是指机体为维持内环境稳定,由基因控制的细胞自主、有序性的死亡形式。主要分为生理和病理两大类,生理性凋亡是指机体内某些细胞生来就注定在一段时间后死去,在尽完自己的职责之后正常死亡;而病理性凋亡则是指细胞在没有完成自己的使命时受到不可抗外力刺激而不正常死亡,从而引发各种疾病。

背景:研究发现,难愈性溃疡创面不易愈合与细胞凋亡失衡和炎症失调有关,以往的研究均在不同个体的某一类型组织取样研究,研究结果数据间可能存在个体差异的影响,且无同一糖尿病足创面不同病程组织的细胞凋亡率、Bcl-2、Bax、肿瘤坏死因子α表达水平之间相关性研究报道。

目的:分析糖尿病足不同病程创面组织细胞凋亡率、Bcl-2、Bax和肿瘤坏死因子α表达水平间的关系及作用机制。

方法:重庆医科大学附属第二医院急诊科收治的15例Wagner 2,3级糖尿病足患者,选择典型的糖尿病足创面,采用“4C”法将局部感染控制后的创面组织区分为坏死、过渡和正常组织后分别采集标本,测定细胞凋亡率、Bcl-2、Bax、Bax/Bcl-2和肿瘤坏死因子α,并对结果进行统计分析。研究经重庆医科大学附属第二医院伦理委员会批准,编号:(2019)329号,所有患者均签署了知情同意书。

结果与结论:①糖尿病足创面正常、过渡、坏死组织的细胞凋亡率分别为(16.67±2.48)%、(43.68±2.22)%和(72.12±4.53)%,差异有显著性意义(P < 0.01);②坏死、过渡和正常组织间Bcl-2、Bax、肿瘤坏死因子α表达水平和Bax/Bcl-2差异有显著性意义(P < 0.01),Bcl-2表达:坏死组织<过渡组织<正常组织,Bax、肿瘤坏死因子α表达及Bax/Bcl-2:坏死组织>过渡组织>正常组织;③Bcl-2、Bax、Bax/Bcl-2、肿瘤坏死因子α和细胞凋亡率间呈曲线关系,曲线回归分析结果显示,糖尿病足创面内肿瘤坏死因子α与Bax、Bax/Bcl-2、细胞凋亡率呈高度正相关,与Bcl-2呈高度负相关;④从结果可得出,细胞凋亡机制与炎症反应参与了糖尿病足创面病理过程,其作用机制可能与下调Bcl-2表达,上调Bax和肿瘤坏死因子α表达,提高Bax/Bcl-2水平,引起组织细胞凋亡率增大有关。

ORCID: 0000-0002-9760-8666(郑敏)

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

关键词: 糖尿病足, “4C”法, 正常组织, 过渡组织, 坏死组织, 细胞凋亡率, Bcl-2, Bax, 肿瘤坏死因子α

Abstract:

BACKGROUND: Non-healing of refractory ulcer wounds is found to be associated with imbalance of apoptosis and dysregulation of inflammation. Previous studies have sampled a certain type of tissue in different individuals, but individual differences maybe exist among the study data. There is still no report on the correlation between apoptotic rate, expression levels of Bcl-2, Bax, Bax/Bcl-2 and tumor necrosis factor α (TNF-α) in wound tissue of diabetic foot ulcer with different disease courses.

OBJECTIVE: To study the relationship between apoptotic rate and expression levels of Bcl-2, Bax and TNF-α in the wound tissue of diabetic foot ulcer with different disease courses and the mechanism of action.

METHODS: Fifteen patients with typical diabetic foot of Wagner grades 2-3 were selected from the Department of Emergency, Chongqing Medical University. The wound tissue was classified as necrotic, transitional and normal tissue using the “4C” method after infection control. The apoptotic rate and levels of Bcl-2, Bax, TNF-α and Bax/Bcl-2 were detected using immunohistochemistry, and the results were statistically analyzed. The study protocol was approved by the Ethics Committee of the Second Affiliated Hospital of Chongqing Medical University, with the approval No. (2019)329. All patients signed an informed consent.

RESULTS AND CONCLUSION: The apoptotic rates of normal, transitional and necrotic tissues of diabetic foot were significantly different, which were (16.67±2.48)%, (43.68±2.22)% and (72.12±4.53)%, respectively (P < 0.01). Significant differences in Bcl-2, Bax, TNF-α and Bax/Bcl-2 levels were also found in normal, transitional and necrotic tissues (P < 0.01). The Bcl-2 level was ranked as necrotic tissue < transitional tissue < normal tissue; and the Bax, TNF-α, and Bax/Bcl-2 levels were ranked as necrotic tissue > transitional tissue > normal tissue. There was a curve relationship between Bcl-2, Bax, Bax/Bcl-2, TNF-α expression and apoptotic rate. The curvilinear regression analysis indicated that the expression of TNF-α had a highly positive correlation with the expression of Bax and Bax/Bcl-2 and had a highly negative correlation with the expression of Bcl-2. Therefore, apoptotic mechanism and inflammatory reaction are involved in the pathological process of diabetic food ulcer, and the mechanism may be related to the down-regulation of Bcl-2 expression, up-regulation of Bax and TNF-α expression, and increase of Bax/Bcl-2, thereby increasing the apoptotic rate.

Key words: diabetic foot, “4C” method, normal tissues, transitional tissues, necrotic tissues, apoptosis rate, Bcl-2, Bax, tumor necrosis factor α

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