自杀未遂抑郁症患者海马代谢的磁共振质子波谱研究

目的 探讨自杀未遂抑郁症患者海马的磁共振质子波谱(1H-MRS)的代谢特点.方法 应用1HMRS成像系统检测24例自杀未遂抑郁症患者和24名健康对照双侧海马N-乙酰天冬氨酸(NAA)、胆碱复合物(Cho)、肌醇(ml)和肌酸(Cr)等4种代谢产物,分别计算海马双侧NAA/Cr、Cho/Cr以及ml/Cr比率,作为反映NAA、Cho和ml水平的评估指标.分析患者组和对照组之间代谢指标的组间差异;利用组内代谢指标双侧比较,结合单侧化指数分析,就海马代谢的左右对称性进行研究.结果 自杀未遂抑郁症组左侧海马NAA/Cr(1.50±0.20)明显低于对照组(1.80±0.16),差异具有统计学意义(P<0.05).对照组左侧海马NAA/cr明显高于右侧(1.45±0.15),差异具有统计学意义(P<0.05);自杀未遂抑郁症组左右两侧海马NAA/Cr的差异没有统计学意义(P>0.05).单侧化指数分析显示,对照组双侧海马NAA/Cr具有不对称性(LINAA/Cr=1.09±0.03,P<0.05),未发现自杀未遂抑郁症组双侧海马NAA/Cr不对称性(P>0.05).未发现自杀未遂抑郁症组任何代谢指标与疾病病程、发作次数以及疾病严重程度(HAMD17评分)的相关性(P>0.05).结论 自杀未遂抑郁症患者左侧海马代谢下降,双侧海马代谢不对称性消失.

A Proton Magnetic Spectroscopy Research on Hippocampus Metabolisms in People with Suicide-attempted Depressions

Objective To investigate the metabolic features of hippocampus in people with suicide-attempted depressions.Methods Proton resonance spectroscopy(1H-MRS)was performed on the bilateral hippocampi of 24 patients with suicide-attempted depressions and 24 healthy people.The ratios of N-acetylasparte(NAA)/creatine(Cr),choline(Cho)/Cr and myoinositol(mI)/Cr were calculated and used as markers reflecting the metabolic levels of NAA,Cho and mI.The differences between the patients with suicide-attempted depressions ...