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增生性瘢痕形成过程中P53蛋白的增殖调控作用 |
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鲁峰 高建华 黎小间
摘 要 目的:从成纤维细胞增殖调控水平,探讨增生性瘢痕过度增长的细胞生物学机理。方法:取正常皮肤和增生性瘢痕各6例为标本,通过细胞培养6~10代后,应用流式细胞仪、粘附式细胞仪检测不同来源的成纤维细胞、P53蛋白的表达和细胞周期的分布。结果:正常皮肤成纤维细胞主要分布在静止期(G0、G1期)且P53蛋白的表达较高;增生性瘢痕成纤维细胞p53蛋白的表达较低,大量细胞处于增殖状态(G2期、S期和M期)。结论:成纤维细胞细胞周期的分布及P53蛋白表达的差异可能是导致增生性瘢痕有别于正常皮肤呈现过度增生生长的细胞生物学机理之一。 关键词 增生性瘢痕 P53 细胞周期
THE DISTRBUTION OF CELL CYCLE AND EXPRESSION OF P53 PROTIEN ON FIBROLASTS DERIVED FRON THE HYPERTROPHIC SCARS AND NORMAL SKINS
Lu Feng,Gao jianhua,Li Xiaojian (Department of Plastic Surgery,Nanfang Hospital of the First Military Medical University Guangzhou 510515)
Abstract purpose:To explore the conctete machanism which account for the different growth characterists of the normal skins and hypertrophic scars.Methods:Six samples of normal skins and hypertrophic scars were collected.The means of cell culture was used,and only 6-10 passages fibroblasts were selected for experiment.The distributions of cell cycle and expression of protein P53 were analysed with the help of the flow cytometer and adherent cell analysis and sorting interactive laser coytometer(ACAS 570).Result:Alarge percent of fibroblasts derived from the hypertrophic scars distribute in G2、S and M periods with low levels of the P53 protein.On the other hand,fibroblasts derived from the normal skins distribute mostly in G0 and G1 period with a high expression of P53 protein.Conclusion:The difference of the distributions of cell cycle and expression of protein P53 may account for the propagative growth characteristic in the pathlogical scars and normal skins. Key words Hypertrophic scar P53 Cell cycle
瘢痕增生是组织创伤后的异常修复,是美容医学基础研究的重要课题。其具体形成机制至今不完全清楚。其组织学特点是病变部位胶原的过度沉积及成纤维细胞的聚集[1]。成纤维细胞是病理性瘢痕形成的功能性细胞,过度增殖的成纤维细胞和沉积的胶原导致局部瘢痕组织明显增生[2]。 导致病理性瘢痕成纤维细胞过度增生的主要原因可能是增殖-凋亡调控的失衡。那么,这种异常的增殖-凋亡又是由哪些基因来调控的呢?目前仍缺乏这方面的研究。本研究试图通过分析不同来源成纤维细胞的细胞周期分布及主要周期调控基因P53的表达,旨在从增殖调控水平初步探讨导致病理性瘢痕形成的细胞生物学机理。
1 材料和方法 1.1 材料
[1] [2] 下一页 上一个医学论文: 多种细胞生长因子复合制剂在医学美容中的应用 下一个医学论文: 实验动物黑斑模型的建立及其研究
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