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第44卷第8期 南京医科大学学报(自然科学版)
2024年8月 Journal of Nanjing Medical University(Natural Sciences) ·1051 ·
·基础研究·
CPO⁃PCL 微粒在缺氧条件下对脂肪间充质干细胞体外增殖及
成骨分化作用的影响
罗 浙 ,练雷栋 ,胡珂琦 ,顾仕荣 ,周 珂 ,干开丰 2*
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宁波大学医学部,浙江 宁波 315000;宁波市医疗中心李惠利医院(宁波大学附属李惠利医院)骨外科,浙江 宁波
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315040
[摘 要] 目的:探究聚己内酯(polycaprolactone,PCL)包载过氧化钙(calcium peroxide,CPO)的 CPO⁃PCL 微粒在缺氧条件下
对脂肪间充质干细胞(adipose⁃derived mesenchymal stem cell,ADMSC)体外增殖及成骨分化作用的影响。方法:提取大鼠
ADMSC,并加入制备的CPO⁃PCL微粒,在缺氧/常氧环境下,正常培养或成骨分化培养细胞,分别于培养第7天和第14天MTT实验
检测ADMSC增殖,碱性磷酸酶(alkaline phosphatase,ALP)试剂盒检测ALP水平;茜素红染色观察钙化结节情况,免疫荧光染色观
察ADMSC核心转录因子⁃2(Runt⁃related transcription factor 2,RUNX2)、骨钙素(Osteocalcin)和骨桥蛋白(Osteopontin)的荧光表
达量。结果:在缺氧成骨分化培养条件下,1.00% CPO⁃PCL微粒显著促进细胞增殖(P < 0.05),0.50%和1.00% CPO⁃PCL微粒显
著增加ADMSC ALP 和钙结节生成量(P < 0.001),促进RUNX2、Osteocalcin 和Osteopontin 蛋白表达(P < 0.05)。在缺氧正常培
养条件下,1.00% CPO⁃PCL微粒增加ADMSC ALP含量,促进RUNX2、Osteocalcin和Osteopontin蛋白表达(P < 0.05)。在常氧成
骨分化培养条件下,1.00% CPO⁃PCL微粒增加ALP和钙结节生成量,0.50%和1.00% CPO⁃PCL微粒促进RUNX2、Osteocalcin蛋
白表达(P < 0.001)。在常氧正常培养条件下,0.50%和 1.00% CPO⁃PCL 微粒促进 RUNX2、Osteocalcin 和 Osteopontin 蛋白表达
(P < 0.05),但对细胞成骨分化无显著影响。结论:1.00% CPO⁃PCL微粒在缺氧成骨分化培养条件下能够促进ADMSC体外增
殖及成骨分化。
[关键词] CPO⁃PCL微粒;ADMSC;成骨分化;细胞增殖;缺氧
[中图分类号] R329.2 [文献标志码] A [文章编号] 1007⁃4368(2024)08⁃1051⁃11
doi:10.7655/NYDXBNSN231175
Effects of CPO⁃PCL microparticles on the proliferation and osteogenic differentiation of
adipose⁃derived mesenchymal stem cells in vitro under hypoxia
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LUO Zhe ,LIAN Leidong ,HU Keqi ,GU Shirong ,ZHOU Ke ,GAN Kaifeng 2*
1 Medical Department of Ningbo University,Ningbo 315000;Department of Orthopedics,Li Huili Hospital of Ningbo
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Medical Center(Affiliated Li Huili Hospital of Ningbo University),Ningbo 315040,China
[Abstract] Objective:To investigate the effects of calcium peroxide(CPO)⁃loaded polycaprolactone(PCL)microparticles(CPO⁃
PCL)on the proliferation and bone differentiation of adipose ⁃ derived mesenchymal stem cells(ADMSCs)in vitro under hypoxia.
Methods:Rat ADMSCs were extracted and added with the prepared CPO⁃PCL particles for normal or osteogenic differentiation culture
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under hypoxia/normoxia environment. On the 7 and 14 days,cell proliferation,alkaline phosphatase(ALP)level,the calcification of
nodulation,and the fluorescence intensity of Runt⁃related transcription factor 2(RUNX2),Osteocalcin and Osteopontin were examined
by the MTT assay,alkaline phosphatase(ALP)kit,alizarine red staining and immunofluorescence staining,respectively. Results:
Under hypoxia and osteogenic differentiation culture conditions,1.00% CPO ⁃ PCL microparticles significantly promoted ADMSCs
proliferation(P < 0.05),and CPO⁃PCL microparticles of 0.50% and 1.00% concentrations notably increased the production of ALP and
calcium nodules(P < 0.001),while enhancing the expressions of RUNX2,Osteocalcin and Osteopontin proteins(P < 0.05). Under
hypoxia and normal culture conditions,1.00% CPO ⁃ PCL microparticles elevated ALP levels,increased the expression levels of
[基金项目] 浙江省自然科学基金(LQ21H060002);宁波市自然科学基金(2022J251);宁波市公益类科技计划(2021S105);宁
波市卫生健康青年技术骨干人才培养计划([2021]106)
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通信作者(Corresponding author),E⁃mail:gankaifeng22@163.com