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中华诊断学电子杂志 ›› 2013, Vol. 01 ›› Issue (01) : 36 -39. doi: 10.3877/cma.j.issn.2095-655X.2013.01.007

所属专题: 文献

临床研究

轻度认知功能损害患者扣带后回谷氨酸多体素氢质子磁共振波谱研究
陈双庆1,(), 蔡庆1, 沈玉英1, 赵中2, 周华2   
  1. 1. 215001 苏州,南京医科大学附属苏州医院放射科
    2. 215001 苏州,南京医科大学附属苏州医院神经科
  • 收稿日期:2013-10-29 出版日期:2013-11-26
  • 通信作者: 陈双庆
  • 基金资助:
    国家自然科学基金(81171297)

A study on posterior cingulate gyrus glutamate levels in mild cognitive impairment patients using proton magnetic resonance spectroscopy with multi-voxel.

Shuangqing Chen1,(), Qing Cai1, Yuying Shen1, Zhong Zhao2, Hua Zhou2   

  1. 1. Department of Radiology, Suzhou Hospital, Nanjing Medical University, Suzhou 215001, China
  • Received:2013-10-29 Published:2013-11-26
  • Corresponding author: Shuangqing Chen
  • About author:
    Corresponding author: Chen Shuangqing, Email:
引用本文:

陈双庆, 蔡庆, 沈玉英, 赵中, 周华. 轻度认知功能损害患者扣带后回谷氨酸多体素氢质子磁共振波谱研究[J/OL]. 中华诊断学电子杂志, 2013, 01(01): 36-39.

Shuangqing Chen, Qing Cai, Yuying Shen, Zhong Zhao, Hua Zhou. A study on posterior cingulate gyrus glutamate levels in mild cognitive impairment patients using proton magnetic resonance spectroscopy with multi-voxel.[J/OL]. Chinese Journal of Diagnostics(Electronic Edition), 2013, 01(01): 36-39.

目的

利用氢质子磁共振波谱(1H-MRS)探讨谷氨酸(Glu)水平的变化对轻度认知功能损害(MCI)的诊断价值。

方法

应用1.5 T磁共振扫描仪对20例MCI患者、20例阿尔茨海默病(AD)患者、20例健康对照者(NC)行多体素1H-MRS检查,测定受检者左侧大脑扣带后回、海马及额叶谷氨酸(Glu)与肌酸(Cr)的峰下面积,分析、比较各组间Glu/Cr比值的变化。组间各指标的比较采用单因素方差分析。

结果

在左侧扣带后回,1H-MRS显示MCI组及AD组Glu/Cr值分别为0.37±0.03及0.30±0.03,较NC组(0.42±0.03)明显降低,差异有统计学意义(F=19.36,P<0.05)。在左侧海马区,MCI组Glu/Cr值为0.40±0.03,与NC组(0.41±0.03)差异无统计学意义,但AD组Glu/Cr值(0.32±0.03)明显降低,与NC组差异有统计学意义(F=7.41,P<0.05)。在左侧额叶,MCI组及AD组Glu/Cr值(0.41±0.03、0.43±0.03)均较NC组(0.43±0.03)差异无统计学意义(F=0.84,P>0.05)。

结论

1H-MRS中,左侧扣带后回Glu含量的变化可能是诊断MCI的有效生化指标之一。

Objective

To explore the diagnosis value of quantitative analysis of glutamate(Glu) with mild cognitive impairment (MCI) by proton magnetic resonance spectroscopy (1H-MRS).

Methods

According to the clinical diagnosis standard for cognitive function, the study group included 20 patients with mild cognitive impairment (MCI group, 9 males and 11 females) and 20 patients with Alzheimer′s disease (AD group, 10 males and 10 females), and the control group used 20 healthy volunteers (NC group, 9 males and 11 females). All of the patients and volunteers were scanned by multi voxel 1H-MRS using rapid acquisition with relaxation enhancement (RARE) and point-resolved spectroscopy (PRESS) pulse sequence. The levels of the Glu and Cr were measured in the posterior cingulate gyrus, hippocampus and the frontal gyms cortex automatically by the NUTS-NMR Utility Transform Software. The ratios of Glu/Cr were calculated and compared among the groups. Comparisons of the cognitive function and the 1H-MRS indexes among MCI, AD and NC group were conducted by single factor analysis of variance (one-way ANOVA), between two groups significantly compared with minimal difference method (LSD).

Results

Gender, age, and the fixed number of year of the education comparison between each group had no statistical difference (P>0.05). MMSE detection showed that cognitive function in the MCI group was lower than that in the NC group, and difference was statistically significant (t=0.427, P<0.05). However, there was significant difference in cognitive function between AD and MCI groups (t=0.366, P<0.05). According to 1H-MRS, Glu/Cr ratios of the posterior cingulate gyri region in AD (0.37±0.03) and MCI (0.30±0.03) groups were significantly decline compared with NC group(0.42±0.03), and different had statistical difference (t=0.271 and 0.652, P<0.05). However, there were no significant difference for Glu/Cr ratios of the hippocampus between MCI (0.40±0.03) and NC (0.41±0.03) groups (t=0.054, P>0.05), but the Glu/Cr ratios of the hippocampus region in AD (0.32±0.03) and NC groups were significantly different (t=0.594, P<0.05). There were no significant changes in Glu/Cr ratios among AD, MCI and NC groups (0.41±0.03, 0.43±0.03 and 0.43±0.03).

Conclusion

In 1H-MRS test, Glu may be an effective biochemical index of the diagnosis of MCI. 1H-MRS quantitative analysis provides the important basis for the early diagnosis of MCI.

图1 轻度认知功能损害(MCI)组与健康老年人(NC)组左侧扣带后回1H-MRS图,显示MCI组(a)Glu/Cr值较NC组(b)明显降低
图2 轻度认知功能损害(MCI)组与健康老年人(NC)组左侧海马1H-MRS图,显示MCI组(a)Glu/Cr值较NC组(b)无明显变化
表1 MCI组、AD组与NC组左侧扣带后回、海马及额叶Glu/Cr值比较(比值,±s)
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