| 张 磊,扶世杰,周 鑫,郭晓光,汪国友,关钛元,李义凯.NT-3/TrkC信号通路在猴前交叉韧带本体感觉损伤中的作用[J].中国康复医学杂志,2018,(5):513~519 |
| NT-3/TrkC信号通路在猴前交叉韧带本体感觉损伤中的作用 点此下载全文 |
| 张 磊 扶世杰 周 鑫 郭晓光 汪国友 关钛元 李义凯 |
| 南方医科大学中医药学院，广州，510515 |
| 基金项目：国家自然科学基金项目（81674095）；泸州市科技计划项目[2014-S-46 (8/11)]； 西南医科大学-西南医科大学附属中医医院联合专项项目（2016-4-31） |
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| 摘要
目的：探讨NT-3/TrkC信号通路在前交叉韧带（ACL）本体感觉损伤中的作用和机制。
方法：选取12只正常的食蟹猴，随机选择9只食蟹猴进行关节镜下单侧ACL损伤造模后，将全部膝关节分为三组：正常组（3只正常食蟹猴每只选1个正常膝关节，共3个）、模型A组（9个模型中的健侧膝关节）和模型B组（9个模型中的损伤侧膝关节），模型A组和模型B组同属模型组。在造模后4、8、12周，运用RT-qPCR和Western Blot技术检测L2-S1DRG中NT-3、TrkC以及ACL中GAP-43基因和蛋白的表达水平。
结果：在同一时间点，与正常组相比，模型组DRG中NT-3、TrkC的基因和蛋白相对表达量下降，有显著性差异(P<0.01)。与正常组相比，模型A组和模型B组ACL中GAP-43的基因和蛋白相对表达量上升，而模型B组又高于模型A组，有显著性差异(P<0.01)。在模型组不同时间点，DRG中NT-3、TrkC的基因和蛋白相对表达量随时间的增加而逐渐下降且均低于正常组，有显著性差异(P<0.01)。与正常组比较，在模型A组和模型B组不同时间点，ACL中GAP-43的基因和蛋白相对表达量均上升，但随时间的增加而逐渐下降，有显著性差异(P<0.01)。
结论：NT-3/TrkC信号通路在ACL本体感觉损伤和康复中有着重要的作用。当ACL损伤时，引起局部GAP-43的表达上升，以及DRG中NT-3、TrkC的表达下降，同时对侧ACL本体感受器的功能也受到影响。 |
| 关键词：信号通路 前交叉韧带 本体感觉 食蟹猴 |
| The changing of NT-3/TrkC proprioceptive signaling pathway after ACL injury Download Fulltext |
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| Academy of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515 |
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| Abstract: |
| Abstract
Objective: To investigate the changing and mechanism of NT-3/TrkC proprioceptive signaling pathway after ACL impairment.
Method: Totally 12 normal cynomolgus monkeys were selected, and 9 among the 12 were randomly selected to being unilateral 1/4 ACL cut off under arthroscopy. The normal group included one knee of each non-operation monkeys，3 in total. A model group included contrast lateral knee joint in the 9 and B model group included the injured knee joint in the 9 RT-qPCR and Western-blot were used to detect the expression of GAP-43 gene and protein in L2-S1DRG, TrkC and ACL for normal monkeys and model groups at in 4, 8 and 12 weeks after modeling for for model groups..
Result: Comparing with normal group, the relative expression of NT-3 and TrkC in DRG decreased for model groups. The difference was significant (P<0.01). Comparing with the normal group, the relative expression of GAP-43 gene and protein in ACL increased in model groups, but the model group B was higher than the model group A (P<0.01). In the model groups at different time points, the relative expression of NT-3 and TrkC in DRG decreased gradually with the increase of time, and were lower than those in the normal group(P<0.01). Comparing with the normal group, the relative expression of GAP-43 gene and protein increased in ACL in the model A and model B groups at different time points,but it decreased with the time increased.
Conclusion: NT-3/TrkC signaling pathway plays an important role in ACL rehabilitation. When ACL was injured, the expression of GAP-43 increased and NT-3 and TrkC decreased in the DRG, the changes also happened in contrast lateral ACL receptors. |
| Keywords:signal pathway anterior cruciate ligament proprioception cynomolgus monkeys |
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