机构地区:[1]汕头大学医学院第二附属医院影像中心,515041 [2]汕头大学医学院第二附属医院神经内科,515041
出 处:《中华精神科杂志》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)
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 pati
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
分 类 号:R749.1[医药卫生—神经病学与精神病学]
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