国际口腔医学杂志 ›› 2021, Vol. 48 ›› Issue (6): 635-639.doi: 10.7518/gjkq.2021111

• 论著 • 上一篇    下一篇

转化生长因子-β2促进牙髓干细胞增殖和分化的作用研究

熊梦琳1,2(),吴龙1,2,马丽1,2,赵今1,2()   

  1. 1.新疆医科大学第一附属医院(附属口腔医院)牙体牙髓科 乌鲁木齐 830054
    2.新疆维吾尔自治区口腔医学研究所 乌鲁木齐 830054
  • 收稿日期:2021-02-05 修回日期:2021-06-02 出版日期:2021-11-01 发布日期:2021-10-28
  • 通讯作者: 赵今
  • 作者简介:熊梦琳,硕士,Email: 181099496@qq.com
  • 基金资助:
    新疆维吾尔自治区自然科学基金(2020D01C253)

Role of transforming growth factor-β2 in promoting the proliferation and differentiation of dental pulp stem cells

Xiong Menglin1,2(),Wu Long1,2,Ma Li1,2,Zhao Jin1,2()   

  1. 1. Dept. of Cariology and Endodontics, The First Affiliated Hospital of Xinjiang Medical University(The Affiliated Stomatological Hospital of Xinjiang Medical University, Urumqi 830054, China
    2. Stomatological Disease Institute of Xinjiang Uyghur Autonomous Region, Urumqi 830054, China
  • Received:2021-02-05 Revised:2021-06-02 Online:2021-11-01 Published:2021-10-28
  • Contact: Jin Zhao
  • Supported by:
    Natural Science Foundation of Xinjiang Uygur Autonomous Region(2020D01C253)

摘要:

目的 探讨转化生长因子-β2(TGF-β2)对牙髓干细胞(DPSCs)增殖和分化的影响。方法 分离、培养DPSCs,分为阴性对照组、阳性对照组和TGF-β2组。四甲基偶氮唑盐比色法(MTT)检测细胞活力,碱性磷酸酶(ALP)活性测定试剂盒检测细胞内ALP活性,蛋白质印迹法检测Runt相关转录因子2(Runx2)、骨涎蛋白(BSP)和骨桥蛋白(OPN)的表达,免疫组织化学染色检测Runx2阳性表达。结果 与阳性对照组相比,TGF-β2作用3、7、10 d后DPSCs的活力不断升高,细胞内ALP活性上调,Runx2、BSP和OPN蛋白表达水平升高,Runx2阳性表达程度升高(P<0.05)。结论 TGF-β2可促进DPSCs增殖及成骨分化。

关键词: 转化生长因子-β2, 牙髓干细胞, 增殖, 分化

Abstract:

Objective This work explores the effect of transforming growth factor-β2 (TGF-β2) on the proliferation and differentiation of dental pulp stem cells (DPSCs). Methods DPSCs were isolated, cultured, and randomly divided into negative control, positive control, and TGF-β2 groups. Tetramethylazoazole colorimetric method (MTT) was used to detect cell viability, and alkaline phosphatase (ALP) activity assay kit was applied to measure intracellular ALP activity. Western blot method was employed to detect Runt-related transcription factor 2 (Runx2), bone sialoprotein (BSP), and osteopontin (OPN) protein expression. Immunohistochemical staining was conducted to detect Runx2 positive expression. Results Compared with the positive control group, DPSCs activity continued to increase, intracellular ALP activity was up-regulated, Runx2, BSP, and OPN protein expression levels were increased, and Runx2 positive expression was increased after 3, 7, and 10 days of TGF-β2 treatment (P<0.05). Conclusion TGF-β2 can promote the proliferation and osteogenic differentiation of DPSCs.

Key words: transforming growth factor-β2, dental pulp stem cells, proliferation, differentiation

中图分类号: 

  • R781

图1

第4代DPSCs培养3 d的细胞形态 倒置荧光显微镜 × 200"

表1

TGF-β2对DPSCs增殖的影响"

培养
时间/d
OD490 F P
阴性对照组 阳性对照组 TGF-β2组
1 0.31±0.02 0.30±0.06 0.38±0.03 0.951 0.438
3 0.47±0.02 0.65±0.03* 0.68±0.07*# 18.600 0.003
7 0.77±0.05 1.35±0.08* 1.75±0.08*# 144.050 <0.000 1
10 1.13±0.03 1.53±0.08* 1.82±0.06*# 103.170 <0.000 1

表2

TGF-β2对DPSCs ALP活性的影响"

培养
时间/d
OD520 F P
阴性对照组 阳性对照组 TGF-β2组
1 10.23±1.29 9.59±0.33 10.50±0.76 0.84 0.476 9
3 12.78±0.51 15.30±1.78* 19.12±0.32*# 19.97 0.002 2
7 13.00±0.19 24.62±1.75* 38.17±2.69*# 138.12 <0.000 1
10 23.55±2.42 45.39±1.48* 54.12±3.60*# 106.22 <0.000 1

图2

DPSCs中Runx2、BSP和OPN蛋白的表达 A:阴性对照组;B:阳性对照组;C:TGF-β2组。"

表3

TGF-β2对DPSCs Runx2、BSP和OPN蛋白表达的影响"

检测
蛋白
蛋白相对表达量 F P
阴性对照组 阳性对照组 TGF-β2组
Runx2 0.18±0.02 0.54±0.03* 0.71±0.07*# 114.54 <0.0001
BSP 0.22±0.04 0.69±0.06* 0.92±0.08*# 105.55 <0.0001
OPN 0.18±0.03 0.37±0.04* 0.51±0.04*# 67.83 <0.0001

图3

DPSCs中Runx2的表达 免疫组织化学染色 × 200 A:阴性对照组;B:阳性对照组;C:TGF-β2组。"

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