摘要
目的建立SD大鼠单纯心理应激的动物模型,探讨单纯心理应激对SD大鼠颞下颌关节组织结构的影响,为TMD的治疗提供基础研究.方法选取7周龄雌性SD大鼠54只,设立心理应激组、足部电击组(不作为本实验的观察对象)及空白对照组,通过旁观电击实验建立SD大鼠单纯心理应激的动物模型,采用旷场实验等方法观察其行为改变.分别于实验后1、3、5周处死各组SD大鼠,采用HE染色观察髁突软骨组织学改变.结果 SD大鼠单纯心理应激动物模型构建有效.病理检查显示心理应激组SD大鼠髁突软骨发生了病理性改变,其中心理应激组Ⅱ最为严重,表现为髁突软骨胶原纤维松解、断裂并形成大小不一的裂隙.结论本研究所建立的SD大鼠单纯心理应激动物模型具备了良好的可行性及可重复性.长期的单纯心理应激可导致SD大鼠颞下颌关节髁突软骨组织结构的改变.
Objective To establish the Sprague-Dawley rats psychological stress model and investigate me effect of the psychological stress on behavior and condylar cartilage of Sprague-Dawley rats. Methods Sprague-Dawley rats were randomly divided equally into psychological stress group, foot shock group and control group, and the foot shock group was only as sources of stimuli. The Sprague-Dawley rats psychological stress model was built, and the rats were killed at 1, 3 and 5 weeks respectively after stimulation. The behavior changes were observed by open field test, etc. The histology of condylar cartilage was observed by HE stain. Results Psychological stress model was effective in evaluating behavior changes. The pathological examination revealed structural changes of the condylar cartilage in the psychological stress group. The psychological stress group Ⅱ was the most serious group with collagenous fibers disintegrated and gaps formed. Conclusion This rats model of the psychological stress shows great practicability and reproducibility. The long-term psychological stress can lead to SD rats behavior changes and temporomandibular joint condylar cartilage change.
出处
《昆明医科大学学报》
CAS
2013年第9期1-6,共6页
Journal of Kunming Medical University
基金
云南省科技厅联合专项基金资助项目(2011c175)
关键词
单纯心理应激
SD大鼠
颞下颌关节
HE染色
Psychological stress
Sprague-Dawley rats
Temporomandibular joints
HE stain
