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ÖÐͼ·ÖÀàºÅ:R392.114
ÎÄÏ×±êʶÂë:B
ÎÄÕ±àºÅ:1673-8225
(2008)15-02879-04

ÊÕ¸åÈÕÆÚ£º2007-12-07 ÐÞ»ØÈÕÆÚ£º2008-02-12 (07-50-12-6803/WL¡¤Y)

Time-course analysis of interleukin 1 alpha and 1 beta gene expression during the skin wound healing in mice

Abstract


AIM:
Studies reveal that, cytokines play an important role in the process of various inflammatory reaction, wound repair and cell mutation, also, cytokines are expected to be a novel indicator of ratiocinating wound time. This study was designed to explore the changes in gene expression of interlukin-1¦Á (IL-1¦Á) and interlukin-1¦Â (IL-1¦Â) during the skin wound healing process in mice at different phases.
METHODS: The experiment was carried out in the laboratory of Forensic Medicine Department of China Criminal Police University from March 2006 to December 2007. ¢ÙThirty-five BALB/c inbred male white mice of cleaning grade, aged 25-27 g, were used in this study. ¢ÚSkin wound model was induced by injuries in the area of 1.0 cm away from two sides of spinal column, without affection on muscles. Three pairs of injuries were established in each mouse. Five animals were decapitated under anesthesia at 0, 3, 6, 12 hours and 1, 3, 6 days, respectively, whereas those at 0 hour were taken as controls. ¢ÛThe white blood cells at different phases were observed under microscope after immunochemical staining. Real-time quantitative polymerase chain reaction method was applied to detect gene expression of IL-1¦Á and IL-1¦Â.
RESULTS: Thirty-five BALB-c inbred male white mice were all involved in the result analysis. ¢ÙSkin wound was weakly positive during 0-5 hours after injury; the positive reaction was attenuated during 6-24 hours, and positive cells increased, of which macrophages were dominant. Infiltration of massive leucocyte neutrophils and a small quantity of mononuclear cells were detectable at 1 day; mononuclear cells increased during 2-4 days, and reached a peak at 3 days. In control group, the epidermis, folliculus pili, glandulae sebaceae and coil gland were all weakly positive. ¢ÚIL-1¦Á and IL-1¦Â were expressed at early phase after injury, and two expressing peaks were found at 6 and 72 hours, then decreased to normalized levels at 6 days after injury.
CONCLUSION: Genet expression of IL-1¦Á and IL-1¦Â in damaged tissues has a regularity with wound time, and can be used for reference to estimate early injury age in forensic cases.

Li S, Wang J. Time-course analysis of interleukin 1 alpha and 1 beta gene expression during the skin wound healing in mice.Zhongguo Zuzhi Gongcheng Yanjiu yu Linchuang Kangfu 2008;12(15):2879-2882(China)
[www.zglckf.com/zglckf/ejournal/upfiles/08-15/15k-2879(ps).pdf]

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