中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (25): 5396-5402.doi: 10.12307/2025.516

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

血管生成素样蛋白4通过调节成纤维细胞和内皮细胞功能影响糖尿病足进程

宋庆宏1,吴  楠1,史  燕1,崔洪雨1,刘  飞1,刘汉冲1,周  宁1,姚  斌2   

  1. 1天津市人民医院血管疾病诊疗中心,天津市   300121;2天津大学,天津市   300072
  • 收稿日期:2024-04-02 接受日期:2024-06-03 出版日期:2025-09-08 发布日期:2024-12-26
  • 通讯作者: 姚斌,博士,副教授,天津大学,天津市 300072
  • 作者简介:宋庆宏,男,1979年生,天津市人,博士,副主任医师,主要从事血管外科相关性疾病的诊治工作。
  • 基金资助:
    国家重点研发计划项目(2022YFC2403100),项目负责人:姚斌;天津市卫生健康委员会科技项目(ZC20112),项目负责人:宋庆宏

Angiopoietin-like protein 4 affects progression of diabetic foot by regulating fibroblast and endothelial cell functions

Song Qinghong1, Wu Nan1, Shi Yan1, Cui Hongyu1, Liu Fei1, Liu Hanchong1, Zhou Ning1, Yao Bin2   

  1. 1Vascular Disease Diagnosis and Treatment Center, Tianjin Union Medical Center, Tianjin 300121, China; 2Tianjin University, Tianjin 300072, China
  • Received:2024-04-02 Accepted:2024-06-03 Online:2025-09-08 Published:2024-12-26
  • Contact: Yao Bin, MD, Associate professor, Tianjin University, Tianjin 300072, China
  • About author:Song Qinghong, MD, Associate chief physician, Vascular Disease Diagnosis and Treatment Center, Tianjin Union Medical Center, Tianjin 300121, China
  • Supported by:
    National Key Research & Development Project, No. 2022YFC2403100 (to YB); Science and Technology Project of Tianjin Health Commission, No. ZC20112 (to SQH)

摘要:

文题释义:

血管生成素样蛋白4(angiopoietin-like protein4,ANGPTL4):是血管生成素样蛋白家族成员之一,由406个氨基酸组成,它包含一个N末端螺旋域、联结子和C末端纤维蛋白原样域,是一种分泌信号多肽,蛋白组构与血管生成素相似。血管生成素样蛋白4在脂质和葡萄糖代谢过程中发挥至关重要的作用,并且它可通过损坏调节器分子来抑制脂蛋白脂酶活性,进而提高血浆中三酰甘油的浓度。
糖尿病足:糖尿病患者因下肢远端神经异常和不同程度的血管病变导致的足部感染、溃疡和(或)深层组织破坏。一般分为3种类型,神经型、缺血型和神经缺血型(也称混合型),轻者可仅表现为皮肤瘙痒、干燥、无汗、色素沉着,脚部微痛、感觉迟钝、间歇性跛行、关节变形、皮肤表面溃疡;中度者可以出现较深的溃疡合并感染;严重者可累及骨,造成骨折和骨坏死。

摘要
背景:研究表明,血管因素对糖尿病足的发生具有重要影响。 
目的:探讨血管生成素样蛋白4在糖尿病足形成中的重要作用。
方法:①对糖尿病足患者的基因表达谱数据进行生物信息学分析,找到关键基因。收集糖尿病足患者以及无糖尿病健康人的皮肤标本进行苏木精-伊红染色、免疫组化染色以及qRT-PCR实验,检测血管生成素样蛋白4表达情况。②培养人永生化皮肤成纤维细胞系和原代人脐静脉内皮细胞,将2种细胞分别分为对照组和外源性补充血管生成素样蛋白4组,通过划痕实验以及CCK-8实验分别检测成纤维细胞的迁移能力和增殖能力,通过Ki67实验检测内皮细胞的增殖能力。
结果与结论:①生信分析发现,血管生成素样蛋白4基因的下调可能是导致糖尿病足形成的关键基因。②苏木精-伊红染色结果显示,与正常皮肤相比,血管生成素样蛋白在糖尿病足皮肤内弱表达,且其mRNA水平相对表达量降低(P < 0.01)。③划痕实验结果显示,与对照组相比,血管生成素样蛋白4组成纤维细胞迁移能力明显增强;CCK-8细胞增殖实验显示,血管生成素样蛋白4组成纤维细胞的吸光度值在24,48 h均高于对照组(P < 0.01,P < 0.001);提示血管生成素样蛋白4可增强高糖处理的成纤维细胞迁移及增殖能力。④Ki67实验结果显示,与对照组相比,血管生成素样蛋白4组内皮细胞Ki67阳性细胞数目明显多于对照组;CCK-8细胞增殖实验显示,血管生成素样蛋白4组内皮细胞的吸光度值在24,48 h均高于对照组(P < 0.05,P < 0.001)。⑤以上结果均提示血管生成素样蛋白4可增强高糖处理内皮细胞的增殖能力。

关键词: 血管生成素样蛋白4, 成纤维细胞, 血管内皮细胞, 糖尿病足, 生物信息学分析

Abstract: BACKGROUND: Studies have shown that vascular factors have an important impact on the occurrence of diabetic foot.
OBJECTIVE: To investigate the important role of angiopoietin-like protein 4 in the formation of diabetic foot.
METHODS: (1) Bioinformatics analysis was performed on the gene expression profile data of diabetic foot patients to find the key genes. The skin samples of diabetic foot patients and healthy people were collected for hematoxylin-eosin staining, immunohistochemical staining, and qRT-PCR experiments to detect the expression of angiopoietin-like protein 4. (2) The immortalized human skin fibroblast cell line and primary human umbilical vein endothelial cells were cultured. The two kinds of cells were divided into control group and exogenous angiopoietin-like protein 4 supplemented group. The migration ability and proliferation ability of fibroblasts were detected by scratch assay and CCK-8 assay. The proliferation ability of endothelial cells was detected by Ki67 assay.
RESULTS AND CONCLUSION: (1) Bioinformatics analysis results showed that the down-regulation of angiopoietin-like protein 4 gene might be the key gene leading to the formation of diabetic foot. (2) Hematoxylin-eosin staining exhibited that compared with normal skin, angiopoietin-like protein 4 was weakly expressed in diabetic foot skin, and the mRNA level was decreased (P < 0.01). (3) Scratch assay results demonstrated that compared with the control group, fibroblast migration ability was significantly enhanced in the angiopoietin-like protein 4 group. CCK-8 assay showed that the absorbance value of fibroblasts in the angiopoietin-like protein 4 group was higher than that of the control group at 24 and 48 hours (P < 0.01, P < 0.001). It is suggested that angiopoietin-like protein 4 can enhance the migration and proliferation of fibroblasts. (4) Ki67 assay results demonstrated that the number of Ki67 positive cells in the angiopoietin-like protein 4 group was significantly more than that in the control group. CCK-8 assay results showed that the absorbance value of endothelial cells in the angiopoietin-like protein 4 group was higher than that of the control group at 24 and 48 hours (P < 0.05, P < 0.001). (5) All findings suggest that angiopoietin-like protein 4 can enhance the proliferation of endothelial cells treated with high glucose.

Key words: angiopoietin-like protein 4, fibroblast, vascular endothelial cell, diabetic foot, bioinformatics analysis

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