Combinatorial administration of insulin and vitamin C alleviates the cerebral vasospasm after experimental subarachnoid hemorrhage in rabbit

BMC Neuroscience

Research Article

Shouchun Li¹  Jinghui Xue¹  Zhiwen Zhang¹  Jixin Shi²  Hongxia Yin² 

[1] Department of Neurosurgery, First Affiliated Hospital of Chinese PLA General Hospital, Beijing, PR China;Department of Neurosurgery, General Hospital of Nanjing Military Region, Nanjing, PR China;

关键词: Insulin Receptor;    Vascular Endothelial Cell;    Basilar Artery;    Oxygen Free Radical;    Droperidol;   

DOI  :  10.1186/1471-2202-12-77

 received in 2011-03-30, accepted in 2011-08-01,  发布年份 2011

来源: Springer

【 摘 要 】

BackgroundCerebral vasospasm (CVS) is a common serious complication after the spontaneous subarachnoid hemorrhage (SAH). Despite recent advances in medical and surgical treatments, the 30-day mortality rate of SAH remains high, and there is lack of especially effective clinical treatment to alleviate and improve CVS. The present study has investigated the therapeutic effect of insulin and vitamin C on CVS after SAH.ResultsFive days after SAH, there is obvious basilar artery spasm in SAH group, whose average vascular cross-sectional area (233,099 ± 16,750 μm2) is significantly smaller than that in control group (462,128 ± 74,756 μm2), which is also significantly different from those in SAH + insulin group (221,114 ± 43,457 μm2) and SAH + vitamin C group (237,820 ± 21,703 μm2). SAH + insulin + vitamin C group shows no evident vasospasm and maintains a vascular cross-sectional area of 425,530 ± 45,503 μm2, which is significantly different from that in SAH group. Insulin receptor α (InRα) expression is significantly downregulated in the vascular endothelial cells of SAH, SAH + insulin, and SAH + vitamin C groups (P < 0.01) but remains unchanged in vascular endothelial cells of SAH + insulin + vitamin C group (P > 0.05). Five days after SAH, serum and cerebrospinal fluid NO levels in SAH, SAH + insulin, and SAH + vitamin C groups decrease significantly (P < 0.01) compared to that in control group, whereas the reduction is not evident in SAH + insulin + vitamin C group (P > 0.05).ConclusionCombinatorial treatment with insulin and vitamin C has effectively relieved the CVS after SAH in rabbit, possibly through increasing the InRα expression and NO level, whereas treatment with insulin or vitamin C alone fails to do so.

【 授权许可】

Unknown   
© Li et al; licensee BioMed Central Ltd. 2011. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.