Expression and Effect of CGRP in Dorsal Spinal Root Ganglion of Rats with Oxaliplatin-induced Peripheral Neuropathy
10.3870/j.issn.1672-0741.2014.06.006
- VernacularTitle:降钙素基因相关肽在奥沙利铂诱导的外周神经病变大鼠模型脊髓背根神经节中的表达及作用
- Author:
Weiting CHENG
;
Kai XU
- Publication Type:Journal Article
- Keywords:
calcitonin gene-related peptide;
Oxaliplatin;
peripheral neuropathy
- From:
Acta Medicinae Universitatis Scientiae et Technologiae Huazhong
2014;(6):639-642
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the pain behavior of rats with Oxaliplatin‐induced peripheral neuropathy(OXIPN)and cal‐citonin gene related peptide(CGRP)expression.Methods Twenty Wistar rats were randomly divided into 2 groups :normal con‐trol group and model group.Oxaliplatin(20 mg/kg)was injected intraperitoneally to the rats in the model group.Mechanical pain threshold and cold allodynia were detected before and 6 ,24 ,72 h and 7 days after modeling ,respectively.Western blot and im‐munohistochemical method were employed to measure the expression of CGRP in dorsal spinal root ganglion of control group and model group.Results The mechanical pain threshold of modal group rats decreased 6 h after injection of Oxaliplatin as compared with the normal group[(11.6 ± 2.2)g vs. (13.9 ± 3.7)g] ,and decreased with prolongation of time ,reduced to the lowest at 72 h[(3.9 ± 1.4)g]and maintained to day 7 ,and the same trend was found in cold chemical allodynia test.CGRP ex‐pression of dorsal root ganglion increased significantly in the model group rats ,and there was a significant positive correlation between the expression of CGRP and the degree of mechanical pain threshold.Conclusion CGRP plays an important role in Ox‐aliplatin‐induced central sensitization of rats with peripheral neuropathy.
