中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (17): 3521-3528.doi: 10.12307/2025.665

• 骨组织构建 bone tissue construction •    下一篇

程序性细胞死亡受体1影响高糖条件下成骨细胞分化的机制

张万里1,白  涛2,韩念荣2,艾克热木•吾斯曼2,刘岩路2,黄异飞2,胡  炜2   

  1. 1伊犁哈萨克自治州友谊医院骨二科,新疆维吾尔自治区伊宁市  835000;2新疆医科大学附属中医医院脊柱二科,新疆维吾尔自治区乌鲁木齐市  830000
  • 收稿日期:2024-05-28 接受日期:2024-08-05 出版日期:2025-06-18 发布日期:2024-10-30
  • 通讯作者: 胡炜,主任医师,新疆医科大学附属中医医院脊柱二科,新疆维吾尔自治区乌鲁木齐市 830000
  • 作者简介:张万里,男,1984年生,江苏省丰县人,汉族,副主任医师,主要从事脊柱外科研究。
  • 基金资助:
    新疆维吾尔自治区自然科学基金-杰出青年科学基金项目(2022D01E29),项目负责人:胡炜

Mechanism by which programmed cell death protein 1 influences osteoblast differentiation under high-glucose conditions

Zhang Wanli1, Bai Tao2, Han Nianrong2, Akram·Osman2, Liu Yanlu2, Huang Yifei2, Hu Wei2   

  1. 1Second Department of Orthopedics, Friendship Hospital of Yili Kazak Autonomous Prefecture, Yining 835000, Xinjiang Uygur Autonomous Region, China; 2Second Department of Spine, Hospital of Traditional Chinese Medicine Affiliated to Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Received:2024-05-28 Accepted:2024-08-05 Online:2025-06-18 Published:2024-10-30
  • Contact: Hu Wei, Chief physician, Second Department of Spine, Hospital of Traditional Chinese Medicine Affiliated to Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • About author:Zhang Wanli, Associate chief physician, Second Department of Orthopedics, Friendship Hospital of Yili Kazak Autonomous Prefecture, Yining 835000, Xinjiang Uygur Autonomous Region, China
  • Supported by:
    the Natural Science Foundation of Xinjiang Uygur Autonomous Region - Excellent Youth Science Foundation Program, No. 2022D01E29 (to HW)

摘要:



文题释义:
程序性细胞死亡受体1:
是一种跨膜蛋白,广泛表达于活化的T细胞、B细胞以及单核细胞等,与靶细胞上的程序性细胞死亡配体1特异性结合后具有共抑制/共刺激的免疫调控作用,可抑制T细胞活化、增殖及细胞因子分泌,参与肿瘤免疫、自身免疫及免疫耐受等。
糖尿病性骨质疏松:
是糖尿病常见的并发症,常伴发骨量的丧失和骨结构的破坏,增加骨折风险。


背景:程序性细胞死亡受体1属于免疫球蛋白基因超家族,可以调控成骨细胞分化、影响骨稳态,然而其在糖尿病性骨质疏松中的调控作用及机制尚不明确。
目的:探讨程序性细胞死亡受体1对高糖环境下大鼠骨髓间充质干细胞成骨分化的调控作用及机制。
方法:①动物实验:采用随机数字法将12只SD大鼠随机分为对照组(n=6)与模型组(n=6),对照组常规喂养,模型组腹腔注射链脲佐菌素建立1型糖尿病模型,高脂饲料喂养8周建立1型糖尿病性骨质疏松模型。喂养8周后,取2组大鼠股骨,分别进行苏木精-伊红染色、micro-CT检测与程序性细胞死亡受体1、程序性细胞死亡配体1 mNRA表达。②细胞实验:将第3代大鼠骨髓间充质干细胞随机分4组处理:正常对照组、高糖模型组加入低糖培养基,PD-1沉默组转染程序性细胞死亡受体1 siRNA,PD-1沉默空载组转染siRNA-NC。转染48 h后,正常对照组更换为新的低糖培养基,高糖模型组、PD-1沉默组、PD-1沉默空载组更换为高糖培养基,培养48 h后进行成骨诱导培养。成骨诱导21 d后,分别进行茜素红染色、qRT-PCR(程序性细胞死亡受体1、RUNX2 mRNA表达)与Western blot(β-catenin、GSK-3β、p-GSK-3β与Axin2 蛋白表达)检测。
结果与结论:①动物实验:苏木精-伊红染色与micro-CT检测结果显示,模型组大鼠1型糖尿病骨质疏松造模成功。qRT-PCR检测结果显示,模型组程序性细胞死亡受体1、程序性细胞死亡配体1 mRNA表达均高于对照组(P < 0.05)。②细胞实验:茜素红染色结果显示,高糖模型组、PD-1沉默空载组矿化结节形成能力低于对照组、PD-1沉默组。与正常对照组比较,高糖模型组、PD-1沉默空载组程序性细胞死亡受体1 mRNA表达及GSK3β、Axin2蛋白表达均升高(P < 0.05),RUNX2 mRNA表达及p-GSK3β、β-catenin蛋白表达均降低(P < 0.05);与高糖模型组、PD-1沉默空载组比较,PD-1沉默组程序性细胞死亡受体1 mRNA表达及GSK3β、Axin2蛋白表达均降低(P < 0.05),RUNX2 mRNA表达及p-GSK3β、β-catenin蛋白表达均升高(P < 0.05)。③结果表明:沉默程序性细胞死亡受体1表达可通过激活Wnt/β-catenin信号通路促进高糖条件下大鼠骨髓间充质干细胞的成骨分化。


https://orcid.org/0009-0003-1519-0919(张万里)

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: 骨髓间充质干细胞, 糖尿病, 骨质疏松, 成骨分化, 程序性细胞死亡受体1, Wnt/β-catenin信号通路, 工程化组织构建

Abstract: BACKGROUND: Programmed cell death protein 1 belongs to the immunoglobulin gene superfamily and can regulate the differentiation of osteoblasts and affect bone homeostasis. However, there are few studies on the regulatory role and mechanism of programmed cell death protein 1 in diabetic osteoporosis.
OBJECTIVE: To investigate the regulatory role and mechanism of programmed cell death protein 1 on osteogenic differentiation of rat bone marrow mesenchymal stem cells under high-glucose environment. 
METHODS: (1) Animal experiment: A total of 12 Sprageu-Dawley rats were randomized into a control group (n=6) and a model group (n=6). The control group was fed routinely, whereas the model group was injected intraperitoneally with streptozotocin to establish a model of type 1 diabetes mellitus, and the high-fat feed was fed for 8 weeks to establish a model of type 1 diabetic osteoporosis. After 8 weeks of feeding, the femurs of rats in the two groups were taken and subjected to hematoxylin-eosin staining and micro-CT assay. The mRNA expression of programmed cell death protein 1 and programmed death ligand 1 was detected. (2) Cell experiment: Passage 3 rat bone marrow mesenchymal stem cells were randomly divided into four groups: normal control group, high-glucose model group cultured in low glucose medium, programmed cell death protein 1-silenced group transfected with programmed cell death protein 1 siRNA, and programmed cell death protein 1-silenced null group transfected with siRNA-NC. After 48 hours of transfection, the normal control group was cultured in a new low-glucose medium, and the other three groups were cultured in a high-glucose medium for another 48 hours of culture followed by osteogenic induction. After 21 days of osteogenic induction, alizarin red staining, and qRT-PCR (programmed cell death protein 1 and RUNX2 mRNA expression) and western blot (β-catenin, GSK-3β, p-GSK-3β and Axin2 protein expression) were performed.
RESULTS AND CONCLUSION: In the animal experiment, hematoxylin-eosin staining and micro-CT assay showed successful modeling of type 1 diabetic osteoporosis in the model group. qRT-PCR assay showed that the mRNA expression of programmed cell death protein 1 and programmed cell death ligand 1 was higher in the model group than the control group (P < 0.05). In the cell experiment, the results of alizarin red staining showed that the ability of mineralized nodule formation was lower in the high-glucose model group and the programmed cell death protein 1-silenced null group than in the control group and the programmed cell death protein 1-silenced group. Compared with the normal control group, the programmed cell death protein 1 mRNA expression and GSK3β and Axin2 protein expression were elevated in the high-glucose model group and the programmed cell death protein 1-silenced null group (P < 0.05), and the RUNX2 mRNA expression and p-GSK3β and β-catenin protein expression were decreased (P < 0.05). Compared with the high-glucose model group and the programmed cell death protein 1-silenced null group, programmed cell death protein 1 mRNA expression and GSK3β and Axin2 protein expression were decreased in the programmed cell death protein 1-silenced group (P < 0.05), and RUNX2 mRNA expression and p-GSK3β and β-catenin protein expression were elevated (P < 0.05). To conclude, programmed cell death protein 1 silencing can activate the Wnt/β-catenin and improve the osteogenic differentiation of rat bone marrow mesenchymal stem cells under high-glucose conditions.

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: bone marrow mesenchymal stem cells, diabetes mellitus, osteoporosis, osteogenic differentiation, programmed cell death protein 1, Wnt/β-catenin pathway, engineered tissue construction 

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