摘要
目的探讨非痴呆型血管性认知功能损害(VCIND)和轻度认知功能损害(MCI)患者颅内代谢物的磁共振波谱(MRS)的变化特征。方法对25例VCIND患者(VCIND组)、21例MCI患者(MCI组)及30名正常老年人(对照组),应用多体素MRS测定3组间双侧扣带回后部(PCG)、双侧枕叶白质区(OLWM)、双侧背侧丘脑(DT)及双侧额叶白质区(FLWM)的N-乙酰天门冬氨酸(NAA)、肌酸(cr)、肌醇(MI)、胆碱(Cho)的绝对浓度及NAA/Cr、Cho/Cr、MIfCr、NAA/MI、NAA/Cho的比值,联合SAGE7.0及LCModle软件进行定量及后处理分析。结果(1)与对照组比较,VCIND组左侧FLWM的Cho浓度[(1.9±0.4)mmol/L]及MCI组右侧PCG的MI浓度[(6.2±1.1)mmol/L]升高,VCIND组双侧DT、双侧FLWM的NAA/Cr比值(左侧DT:1.34-0.3,右侧DT:1.2±0.3;左侧FLWM:1.3±0.2,右侧FLWM:1.14-0.2)和MCI组双侧PCG的NAA浓度[左侧(6.94-1.1)mmol/L,右侧(7.0±1.4)mmol/L]及NAA/Cr比值(左侧1.2±0.2,右侧1.3±0.3)均降低;差异有统计学意义(P均〈0.05)。(2)VCIND组双侧FLWM、左侧OLWM及右侧DT的NAA/Cho比值(左侧FLWM:4.3±1.1,右侧FLWM:4.2±0.9,P均〈0.01;左侧OLWM:4.6±1.0,右侧DT:5.2±1.4,P均〈0.05)较对照组及MCI组均降低。(3)MCI组双侧PCG及双侧OLWM的NAA/MI的比值(左侧PCG:1.2±0.3,右侧PCG:1.2±0.4,P均〈0.01;左侧OLWM:1.6±0.3,右侧OLWM:1.3±0.4,P均〈0.05)较对照组及VCIND组均减低。结论VCIND和MCI患者颅内代谢物在大脑不同区域存在不同变化。
Objective To investigate metabolite changes in the brain of patients with non-dementia vascular cognitive impairment (VCIND) and mild cognitive impairment (MCI) using magnetic resonance spectroscopy (MRS). Methods Twenty-five patients with VCIND,21 ones with MCI and 30 normal controls (NC) were participated in this experiment. The absolute concentrations of N-acetyl aspartate ( NAA), choline (Cho), myo-inositol (MI), creatine (Cr) and the metabolite ratios of NAA/Cr, Cho/Cr, MI/Cr, NAA/MI and NAA/Cho were measured bilaterally in the posterior cingnlate gyrus (PCG), white matter of the occipital lobe ( OLWM), dorsal thalamus ( DT), and white matter of the frontal lobe ( FLWM ) by multivoxel MRS. The metabolite concentrations were quantified and post-processed using SAGE 7.0 and LCModel software. Results ( 1 ) Compared with the NC group, VCIND patients displayed higher Cho level in the left FLWM [ ( 1.9±0. 4) mmol/L, P 〈 0. 05 ], MCI patients displayed an elevated concentration of MI in the right PCG[ (6. 2 ±1.1 ) mmol/L, P 〈 0.05 ] and lower NAA level in the bilateral PCG [ left ( 6. 9± 1.1 ) mmol/L,right (7. 0 ± 1.4 ) retool/L, all P 〈 0. 05 )]. The NAA/Cr ratio in the bilateral DT and bilateral FLWM with VCIND patients ( left DT of 1.3± 0. 3, right DT of 1.2± 0. 3. left FLWM of 1.3 ±0. 2.right FLWM of 1.1± 0. 2, all P 〈 0. 05 ) and in the bilateral PCG with MCI patients ( left 1.2 ± 0. 2, right 1.3 ± 0. 3 ; all P 〈 0. 05 ) showed lower than NC subjects. (2) The patients with VCIND displayed lower NAA/Cho ratio in left OLWM and right DT ( left OLWM of 4. 6 ± 1.0, right DT of 5.2 + 1.4, all P 〈 0. 05 ) than either NC or MCI subjects, while it displayed a significantly lower NAA/Cho ratio in the bilateral FLWM (left 4. 3 ± 1.1, right 4. 2 ± 0. 9, all P 〈 0. 01 ) than NC subjects. ( 3 ) The NAA/MI ratio in the bilateral OLWM (left 1.6 ±0. 3, right 1.3 ±0. 4, all P 〈 0. 05 ) with MCI patients showed lower than either NC subjects or VCIND patients, while the MCI patients display a significantly lower NAA/MI ratio in the bilateral PCG ( left 1.2 ± 0. 3, right 1.2±0. 4, all P 〈 0. 01 ) than NC subjects. Conclusions Both VCIND and MCI patients may have metabolite dysfunctions in different regions of the brain, it may provide efficient information for clinical diagnosis, preventing and treating in the early stages of dementia.
出处
《中华精神科杂志》
CAS
CSCD
北大核心
2013年第1期32-36,共5页
Chinese Journal of Psychiatry
基金
国家自然科学基金(30930027)
关键词
磁共振波谱学
评价研究
非痴呆型血管性认知功能损害
轻度认知功能损害
Magnetic resonance spectroscopy
Quantitative evaluation
Vascular cognitive impairment no dementia
Mild cognitive impairment