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皮肤光损伤肿瘤模型的建立 被引量:3

Establishment of skin tumor models induced by photo-damage and 7,12-DMBA in mice
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摘要 目的模拟人皮肤肿瘤形成的自然环境因素,建立光损伤小鼠皮肤肿瘤模型。方法采用完全随机的两因素析因设计。选择对光线敏感的BALB/c小鼠,背部皮肤脱毛后UVC照射(56 mJ/cm2),隔天1次,8周结束;二甲基苯蒽/丙酮液(100μg/200μL)外涂,每周1次,共7周,12周后处死。连续测量并记录小鼠背部肿瘤数量和直径,描绘时间-荷瘤数动态变化图;皮肤组织病理学观察肿瘤形成的组织细胞形态学改变。结果单纯UVC照射组无肿瘤出现;UVC+DMBA模型组小鼠6周后背部开始出现肉眼可见的瘤体,第9周荷瘤率达到100%,11、12周荷瘤数渐趋稳定,肿瘤体积有增大趋势,平均荷瘤数为(4.57±3.0)个,肿瘤平均体积为(44.91±4.6)mm3。HE染色、瑞氏染色、基底膜带染色均显示为早期皮肤鳞状细胞癌。而单纯DMBA组荷瘤数第8.5周达高峰,后呈下降趋势,肿瘤自然消退率高,数量不稳定。结论 DMBA是皮肤肿瘤建模的主要因素,但停止该处理因素后荷瘤数量呈下降趋势;UVC作为一个独立因素,在12周内未能诱导出皮肤肿瘤,但UVC与DMBA联合应用具有交互协同作用,可较快速地建立皮肤肿瘤模型。该模型具有出瘤率高,出瘤整齐,荷瘤量多,除去处理因素后瘤体数量依旧稳定,且体积有增大趋势等特点,为皮肤肿瘤的防治研究提供有价值的实验工具。 Objective To simulate natural environmental factors of human skin tumor formation to establish photo- damaged skin tumor models in mice. Methods The study was designed by completely randomized factorial design. BALB/c mice that are light-sensitive were irradiated by UVC (56 mJ/cm2) every other day for 8 weeks and were treated topically with 100 p^g of DMBA in 200 IxL of acetone once a week until 7 weeks on the dorsal skin area after hair removed. The whole process was 12 weeks. The size and diameter of tumors were observed and measured every week. A dynamic growth-curve of tumor-bearing was depicted. The histopathology features of skin dyed by HE staining, Wright' s staining and basement membrane were observed to explore Tumor formation and skin morphologic alteration. Results The mice in model group began to form typical epithelial papilloma at 6 week early and the rate of tumor-bearing were up to 100% at 9 week. Then, the number of tumor-bearing developed rapidly and gradually stabilized at 11 - 12 week to the average number of tumor-bearing up to (4.57 + 3.0) and the average tumor volume up to (44. 91 -+ 4.6) mm3. However, the time of tumor happening in DMBA group mice was earlier than model group. The number of tumor-bearing in DMBA group reached a peak at 8.5 week, and then, had a downward trend. Furthermore, tumor spontaneous regression rate were high and the number of tumor-bearing were unstable. Conclusion DMBA is a main factor of the skin tumors modeling. UVC as an independent factor failed to induce skin tumors in the 12-week period. However, the combination of UVC with DMBA has interactive synergy effects on establishment of skin tumor models, which have excellent characteristics of high rate of tumor- bearing, time unified, the large number of harvest and good stabilization. It is a straight, stable and simple experimental tool for anticancer drugs and mechanism study on skin tumor.
出处 《中国比较医学杂志》 CAS 2013年第9期48-51,F0003,共5页 Chinese Journal of Comparative Medicine
基金 广东省医学科研基金资助课题(A2010309) 广东省高等学校大学生创新实验项目资助课题(1057310043)
关键词 7 12-二甲基苯蒽 短波紫外线 皮肤肿瘤 模型 动物 7,12-DMBA UVC Skin tumor Model, animal
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参考文献12

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同被引文献23

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