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VEGF_(165)对脱细胞真皮基质血管化影响的研究 被引量:6

Effects of VEGF_(165) on vascularization of acellular dermal matrix
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摘要 [目的]观察十二烷基硫酸钠(sodium dodecyl sulfate,SDS)和NaOH复合消蚀法制备的胎儿脱细胞真皮基质(ADM)的组织相容性,以及血管内皮生长因子(VEGF)对ADM血管化的影响。[方法]将足月胎儿皮肤用SDS和NaOH复合消蚀,制备ADM(厚0.3 mm)。用重约300 g的SD雄性大鼠45只,随机分为ADM、ADM+rAAV/LacZ和ADM+rAAV/VEGF1653组进行真皮片皮下包埋实验。术后的2、4、6周分别取材,经HE染色或以VEGF165、基质金属蛋白酶-1(MMP-1)、组织型基质金属蛋白酶抑制剂-1(TIMP-1)的单克隆抗体进行免疫组织化学染色,检测3种蛋白质在移植后的皮肤中的表达情况。观察并比较各组中ADM血管密度,进行图像处理和统计学分析。[结果]ADM无细胞成分,胶原纤维结构规整;术后2周包埋ADM组织中可见到新生血管,及VEGF阳性细胞;无明显的炎性细胞浸润。ADM临近组织中MMP-1和TIMP-1均明显表达,MMP-1的表达高于TIMP-1;术后4周各组细胞数量和新生血管均高于2周。此时MMP-1的表达高于TIMP-1,但TIMP-1的表达较2周时有所增强;术后6周rAAV/VEGF165实验组中VEGF阳性细胞和血管密度明显高于ADM空白组和rAAV/LacZ对照组(P<0.05)。此时TIMP-1的表达则高于MMP-1。[结论]SDS和NaOH复合消蚀法制备的ADM去除细胞彻底,并保持了真皮中原有细胞外基质构筑的完整,而且免疫原性低,组织相容性好;VEGF165与ADM复合移植,具有促进ADM血管化作用;MMP-1和TIMP-1的相互作用参与植入体内的ADM的血管化过程。 [Objective] To observe the biocompatibility of acellular dermal matrix(ADM) prepared by SDS and NaOH maceration,and VEGF165 on the effects of the vascularization of ADM.[Methods] Randomly 45 mice were devided into three groups-ADM vacnity group,ADM+rAAV/LacZ control group and ADM+rAAV/VEGF165 experiment group.ADMs were embed between skins and skin-muscles on the backs of mice.2,4,6 weeks after operations mice skins were drawn the materials from back section.Then they were characterized with HE staining and ...
出处 《大连医科大学学报》 CAS 2009年第1期18-22,共5页 Journal of Dalian Medical University
基金 河北省卫生厅科研基金(04106)
关键词 脱细胞真皮基质 血管内皮生长因子 血管化 acellular dermal matrix vascular endothelial growth factor vascularization
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