急性脑梗死患者血清白细胞介素6与MRI动态变化的相关性研究

目的 研究急性脑梗死患者血清白细胞介素6（IL-6）与MRI各项指标动态变化,探讨血清IL-6在急性脑梗死后脑水肿形成中的作用.方法 测定128例急性脑梗死患者在发病后1、5、14 d的血清IL-6浓度,另外在相应时间点行MRI扫描,处理合成表观扩散系数（ADC）图,测量脑梗死体积、各序列的信号强度比（SIR）、相对表观弥散系数（rADC）.另取同一时期的30名健康体检者作为正常对照组,测定空腹状态下血清IL-6浓度.结果 急性脑梗死患者在脑梗死后1d,血清IL-6即较正常对照组明显增高,在5d时达高峰水平,14 d时明显降低,各时间点的血清IL-6均明显高于正常对照组（P均=0.000）.血清IL-6与脑梗死体积、T2加权像（T2WI）及液体衰减反转恢复（FLAIR）序列的SIR均呈正相关（r值分别为0.750、0.621、0.691,P均=0.000）.血清IL-6与T1加权像（T1WI）的SIR呈负相关（r=-0.404,P=0.000）,在梗死后1、5d的血清IL-6与弥散加权成像（DWI）序列的SIR呈正相关（r=0.678,P=0.000）,脑梗死后1d的血清IL-6与rADC呈负相关（r=-0.826,P=0.000）.结论 血清IL-6的增高可能促发了缺血性脑水肿的形成、发展.

Correlation between serum interleukin-6 and MRI dynamic changes in patients with acute cerebral infarction

Objective To investigate the function of serum Interleukin-6 （IL-6） in the formation of cerebral edema after acute cerebral infarction through dynamic changes of serum IL-6 and MRI indicators.Methods One hundred and twenty-eight patients with cerebral edema after acute cerebral infarction and 30 healthy were selected as our subjects.The serum IL-6 were measured in at 1,5 and 14 d after acute cerebral infarction.MRI scans were performed in the corresponding time,and then processed synthesis of apparent diffusion coefficients （ADC） graph.Cerebral infarction volume,signal intensity ratio （SIR） of each sequence and relative apparent diffusion coefficient（rADC） were measured and calculated.Results The serum IL-6 in patients with acute cerebral infarction at 1 d after cerebral infarction was significantly higher than that in normal control group and reached the peak level at 5th D after cerebral infarction,significantly decreased at 14th d.The serum IL-6 of each time point were significantly higher than that of normal control group（P =0.000）.There were liner positive correlation between the serum IL-6 and the volume of cerebral infarction and SIR of T2 weighted image and fluid attenuation inversion recovery （r =0.750,0.621,0.691 ; P =0.000）.The serum of IL-6 and SIR of T1 weighted image was showed negative correlation （r =-0.404,P =0.000）.The serum of IL-6 and SIR of diffusion-weighted imaging sequence at 1,5 d after cerebral infarction showed a positive correlation （r =0.678,P =0.000）.There was liner negative correlation between the serum IL-6 and rADC at 1 d after cerebral infarction （r =-0.826,P =0.000）.Conclusion The rise of serum IL-6 may promote the formation and development of ischemic cerebral edema.