Chinese Journal of Tissue Engineering Research ›› 2021, Vol. 25 ›› Issue (26): 4112-4117.doi: 10.12307/2021.107
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Zheng Feng, Zhang Fucai, Xu Zhe
Received:
2020-09-11
Revised:
2020-09-12
Accepted:
2020-10-30
Online:
2021-09-18
Published:
2021-04-19
Contact:
Zheng Feng, Department of Orthopedics, Qinghai Provincial People’s Hospital, Xining 810007, Qinghai Province, China
About author:
Zheng Feng, Master, Chief physician, Department of Orthopedics, Qinghai Provincial People’s Hospital, Xining 810007, Qinghai Province, China
Supported by:
CLC Number:
Zheng Feng, Zhang Fucai, Xu Zhe. MicroRNA-98-5p promotes osteoblast proliferation and differentiation: possibilities and mechanisms[J]. Chinese Journal of Tissue Engineering Research, 2021, 25(26): 4112-4117.
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2.1 miR-98-5p模拟物对MC3T3-E1细胞HMGA2和PI3K/Akt/GSK-3β通路的影响 为研究miR-98-5p在MC3T3-E1细胞中对HMGA2和PI3K/Akt/GSK-3β通路的影响,采用miR-98-5p模拟物,在诱导成骨细胞MC3T3-E1分化后,空白对照组和转染对照组的HMGA2和PI3K/Akt/GSK-3β差异无显著变化(P > 0.05),与转染对照组相比,miR-98-5p转染组的HMGA2和PI3K/Akt/GSK-3β蛋白显著降低(P < 0.05),见图1。表明 miR-98-5p可显著抑制成骨细胞MC3T3-E1的HMGA2蛋白表达,同时抑制PI3K/Akt/GSK-3β通路。"
2.2 miR-98-5p模拟物可显著抑制MC3T3-E1细胞的增殖和分化 为探讨miR-98-5p对MC3T3-E1细胞的增殖和分化的影响,成功构建了miR-98-5p转染细胞。用CCK-8检测细胞增殖,空白对照组和转染对照组细胞数量差异无显著性意义 (P > 0.05),与转染对照组相比,miR-98-5p转染组细胞数量显著降低(P < 0.05),见图2。荧光显微镜下观察成骨细胞分化,发现0 h和24 h时各组细胞分化程度差异无显著性意义(P > 0.05),空白对照组和转染对照组48 h和72 h细胞分化程度差异无显著性意义(P > 0.05),与转染对照组相比,miR-98-5p转染组的分化程度显著降低(P < 0.05)。空白对照组和转染对照组MC3T3-E1细胞的增殖差异无显著性意义(P > 0.05),与转染对照组相比,miR-98-5p 转染组MC3T3-E1细胞的增殖明显降低 (P < 0.05)。空白对照组和转染对照组成骨细胞增殖标记物碱性磷酸酶活性及mRNA差异无显著性意义(P > 0.05);与转染对照组相比,miR-98-5p转染组碱性磷酸酶活性及mRNA显著降低(P < 0.05)。见图3。这些研究表明miR-98-5p可显著抑制成骨细胞MC3T3-E1的增殖和分化。"
2.5 HMGA2过表达可显著抑制MC3T3-E1细胞的增殖和分化 研究表明,miR-98-5p可抑制HMGA2蛋白表达,HMGA2可增强PI3K/Akt通路[15],同时还可抑制成骨细胞的增殖分化[16]。MC3T3-E1细胞过表达HMGA2可增强PI3K/Akt/GSK-3β通路。为考察HMGA2过表达对成骨细胞增殖和分化的影响,以荧光显微镜观察,在0 h和24 h各组成骨细胞分化差异无显著意义(P > 0.05),空白对照组和空白质粒组48 h和72 h时成骨细胞分化接近(P > 0.05),与空白质粒组相比,HMGA2过表达组细胞的分化程度显著升高(P < 0.05)。成骨细胞增殖检测结果表明,空白对照组和空白质粒组增殖程度差异无显著性意义(P > 0.05),与空白质粒组相比,HMGA2过表达组细胞增殖明显增加(P < 0.05)。空白对照组和空白质粒组的碱性磷酸酶活性和mRNA差异无显著性意义(P > 0.05),与空白质粒组相比,HMGA2过表达组碱性磷酸酶活性和mRNA表达明显增加(P < 0.05),见图6和7。"
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