浓缩生长因子联合骨髓间充质干细胞膜片的生物学性能及其在骨缺损修复中的作用  

Biological properties of concentrated growth factor combined with bone marrow mesenchymal stem cell sheet and its effect on bone defect repairment

作　　者：石剑虹 田原野 陈楷 孙高 吴国民[1] SHI Jianhong;TIAN Yuanye;CHEN Kai;SUN Gao;WU Guomin(Department of Oral and Maxillofacial Surgery and oral Plastic Surgery,Stomatology Hospital,Jilin University,Changchun 130021,China;Jilin Provincal Key Laboratory of Tooth Development and Bone Remodeling and Regeneration,Stomatology Hospital,Jilin University,Changchun 130021,China)

机构地区：[1]吉林大学口腔医院口腔颌面外一科与口腔整形美容外科,吉林长春130021 [2]吉林大学口腔医院吉林省牙发育及颌骨重塑与再生重点实验室,吉林长春130021

出　　处：《吉林大学学报（医学版）》2024年第6期1535-1546,共12页Journal of Jilin University：Medicine Edition

基　　金：吉林省财政厅医疗卫生人才建设项目(JCSZ2023481-30)。

摘　　要：目的:探讨浓缩生长因子(CGF)对骨髓间充质干细胞(BMSCs)膜片性能的影响,并阐明含CGF复合细胞膜片(CS)在骨缺损修复中的作用。方法:体外实验,选取2只3周龄SD大鼠,分离培养获得BMSCs,茜素红和油红O染色鉴定BMSCs成骨和成脂能力。选取3只3周龄SD大鼠,制备CGF液态提取物(CGFe),将细胞分为对照组、传统CS(BMSC-CS)组和含CGF复合CS(CGF/BMSC-CS)组。HE染色观察2组CS形态表现,茜素红和碱性磷酸酶(ALP)染色检测各组CS体外成骨情况,细胞划痕实验检测各组细胞迁移能力,实时荧光定量PCR(RT-qPCR)法检测各组细胞中ALP、胶原酶Ⅰ型(COL^(-1))、Runt相关转录因子2(RUNX2)和骨钙蛋白(OCN)mRNA表达水平。体内实验,选取15只SD大鼠随机分为对照组、BMSC-CS组和CGF/BMSC-CS组,显微计算机断层扫描(Micro-CT)检测各组大鼠颅骨缺损处骨形成参数,HE染色和Masson染色观察各组大鼠颅骨缺损组织形态表现。结果:第3代BMSCs为梭形,排列紧密,呈漩涡团簇状生长;茜素红染色有明显的钙结节生成,油红O染色有红色脂滴形成,证实细胞具有良好的成骨和成脂分化的能力。CS为白色半透明状,边缘轻微卷曲,剥离后的CS卷曲皱缩为不规则状。与BMSC-CS组比较,CGF/BMSC-CS组CS白色更深,透明程度较低,在厚度和延展性方面明显增加,不易破损,有一定黏性和可塑性。HE染色观察,与BMSC-CS组比较,CGF/BMSC-CS组CS细胞数增加,排列密集,细胞外基质(ECM)更丰富,包裹连接细胞形成一个整体的片状结构。茜素红和ALP染色检测,与对照组比较,BMSC-CS组CS的ALP活性和矿化提升值均明显升高(P<0.05);与对照组和BMSC-CS组比较,CGF/BMSC-CS组CS成骨细胞及红色矿化结节数明显增多,染色明显加深,阳性面积增大,ALP活性和矿化提升值均明显升高(P<0.05)。细胞划痕实验检测,培养24 h,与对照组比较,BMSC-CS组和CGF/BMSC-CS组细胞迁移率均明显升高(P<0.05);与BMSC-CS组比较,CGF/BMSC-CS�Objective:To discuss the effect of concentrated growth factor(CGF)on the performance of bone marrow mesenchymal stem cells(BMSCs)sheets,and to clarify the role of CGF-containing composite cell sheets(CS)in the bone defect repairment.Methods:In in vitro experiments,the BMSCs were isolated and cultured from two 3-week-old SD rats;Alizarin Red S and Oil Red O staining were used to identify the osteogenic and adipogenic capabilities of BMSCs;CGF liquid extracts(CGFe)was prepared from three 3-week-old SD rats.The cells were divided into control group,traditional CS(BMSC-CS)group,and CGF-containing composite CS(CGF/BMSC-CS)group.The morphology of the CS in two groups was observed by HE staining.Alizarin Red and alkaline phosphatase(ALP)staining were used to detect the osteogenic differentiation of the CS in various groups;cell scratch assay was used to detect the migration abilities of the cells in various groups;real-time fluorescence quantitative PCR(RT-qPCR)method was used to detect the mRNA expression levels of ALP,collagen are type 1(COL^(-1)),Runt-related transcription factor 2(RUNX2),and osteocalcin(OCN)in the cells in various groups.In in vivo experiments,15 SD rats were randomly divided into control group,BMSC-CS group,and CGF/BMSC-CS group;micro computed tomography(Micro-CT)was used to detect the bone formation parameters in skull defects of the rats in various groups;HE staining and Masson staining were used to observe the morphology of skull defect tissue of the rats in various groups.Results:The third-generation BMSCs were spindle-shaped,closely arranged,and grew in a vortex cluster.The Alizarin red staining results showed obvious calcium nodules,and the Oil red O staining showed red lipid droplets,confirming the cells’ability to undergo osteogenic and adipogenic differentiation.The CS were white and semi-transparent,with slightly curled edges.The peeled CS were irregularly curled and wrinkled.Compared with BMSC-CS group,the CS in CGF/BMSC-CS group were whiter,less transparent,significantly increased in

关 键 词：浓缩生长因子 细胞膜片 骨髓间充质干细胞 骨缺损再生修复 

分 类 号：R78[医药卫生—口腔医学]