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(2008)11-02056-05

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Morphology of human skin fibroblasts after heat injury in vitro

Abstract

AIM:Previous studies paid more attention to the effect of fibroblast immigration in normal surrounding tissue or blood on wound healing. This study explored the morphological character of fibroblasts after heat injury to support the new operation of autogenous epidermis overlapping denatured dermis.
METHODS: The experiment was performed at the State Key Laboratory of Trauma, Burn and Combined Injury in the Third Military Medical University of Chinese PLA from April 2006 to April 2007. The dermal fibroblast from the infant prepuce disposed after surgery was cultured in vitro, and divided into 2 groups. In normal group, the dermal fibroblasts were put in water bath at 37 ¡æ for 30 seconds; the cells in experimental group were stimulated at different temperatures (50, 51, 52, and 53 ¡æ) for different time (30, 60, 90, and 180 seconds). Cell survival was detected by MTT; morphology of injured cells were observed under inverted microscope and transmission electron microscope at 3 hours, 1, 2, 3, 4, 5, and 7 days; cell cycle was detected by flow cytometry.
RESULTS: At different temperatures and different time, there were significant differences in the survival rate of fibroblast between the experimental groups and normal group (P < 0.05). Compared with the normal group, the survival rate at 52 ¡æ for 30 seconds was 50% (P < 0.05). The transmission electron microscopic observation showed after heat injury the fibroblast became round and enlarging with many ecptoma, and many lucent regions were found in kytoplasm until the seventh day. Flow cytometry analysis suggested S was the sensitive period for injured fibroblast. Compared with normal group, apoptosis rate of cells in the experimental groups at S phase was significantly increased (P < 0.01).
CONCLUSION: Fibroblast activity is greatly reduced after heat injury. Morphology and cell cycle alter significantly until 7 days later.

Li DQ, Huang XY, Yang XH. Morphology of human skin fibroblasts after heat injury in vitro.Zhongguo Zuzhi Gongcheng Yanjiu yu Linchuang Kangfu 2008;12(11):2056-2060(China) [www.zglckf.com/zglckf/ejournal/upfiles/08-11/11k-2056(ps).pdf]


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4 ²Î¿¼ÎÄÏ×

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