阴性与阳性症状为主的精神分裂症患者脑部质子波谱比较研究

目的 比较阴性与阳性症状为主的精神分裂症患者前额叶和丘脑质子波谱特点及差异.方法 对58例阴性症状为主(阴性组)和51例阳性症状为主(阳性组)的精神分裂症患者,在入组后应用抗精神病药物治疗前采用多体素磁共振质子波谱(1H-MRS)检测双侧前额叶和丘脑N-乙酰基天门冬氨酸(NAA)、胆碱复合物(Cho)与肌酸复合物(Cr),完成NAA/Cr值、Cho/Cr值的计算,并进行对比分析.结果 阴性组右侧丘脑NAA/Cr值(1.40±0.29)低于阳性组(1.62±0.33),阴性组的男性、女性、非首发、服药、未服药患者右侧丘脑NAA/Cr值分别低于阳性组相应的患者(均P＜0.05或0.01);阴性组的女性、非首发、未服药患者右侧丘脑Cho/Cr值高于阳性组相应的患者(P＜0.05).阴性组、阳性组左侧前额叶、左侧丘脑、右侧丘脑NAA/Cr值均与发病年龄负相关(P＜0.05或0.01),阴性组右侧丘脑Cho/Cr值与发病年龄正相关(r=0.25,P＜0.05);阴性组非首发、未服药患者右侧丘脑NAA/Cr值与病程负相关(r=0.48,P＜0.05),Cho/Cr值与病程正相关(r=0.58,0.56,P＜0.01).结论 阴性症状为主的精神分裂症患者的右侧丘脑波谱异常相对明显,病程对波谱的影响更明显.

Abstract：

Objective To compare the differences between the schizophrenics with negative and positive symptoms on prefrontal lobe and thalamus by proton magnetic resonance spectroscopy ( 1 H-MRS). Methods 58 negative subtype and 51 positive subtype schizophrenics were examined at prefrontal lobe and thalamus by multivoxel 1H-MRS before antipsychotic treatment The N-acetylaspartate (NAA), choline-containing compounds ( Cho), and creatine compounds (Cr) were measured and the ratios of NAA/Cr, Cho/Cr were determined. Results On right thalamus,the NAA/Cr ratio in negative subtype patients ( 1.40 ± 0.29 ) demonstrated lower than that in positive subtype ( 1.62 ± 0.33 ), the same phenomenon were appeared on male, female, non-first-episode, with-medicine and without-medicine patients (P ＜ 0.05 or 0.01 ). The Cho/Cr ratio on right thalamus in negative subtype of female,non-first-episode,without-medicine schizophrenics were lower than those in positive subtype (P ＜ 0.05 ).On left prefrontal lobe,left thalamus and right thalamus, the NAA/Cr ratios both in negative subtype and positive subtype schizophrenics were significantly negatively related with age of onset(P＜0. 05 or 0.01 ). In negative subtype schizophrenics,the Cho/Cr ratio on right thalamus was positively related with age of onset ( r = 0. 25, P ＜0.05 ). In negative subtype schizophrenics of non-first-episode, without-medicine, the correlation was negative between the NAA/Cr ratio and the course of disease( r= -0.48, -0.46, P＜0.05 ) ,and was positive between Cho/Cr ratio and the course of disease on right thalamus( r= 0.58,0.56, P＜ 0.01 ). Conlusion Compared with positive subtype schizophrenics,negative subtype schizophrenics have greater impairments on 1 H-MRS on right thalamus. The course of disease has greater effects on 1 H-MRS in negative subtype schizophrenics.

Proton magnetic resonance spectroscopy study on prefrontal lobe and thalamus in schizophrenics with negative and positive symptoms

Objective To compare the differences between the schizophrenics with negative and positive symptoms on prefrontal lobe and thalamus by proton magnetic resonance spectroscopy ( 1 H-MRS). Methods 58 negative subtype and 51 positive subtype schizophrenics were examined at prefrontal lobe and thalamus by multivoxel 1H-MRS before antipsychotic treatment The N-acetylaspartate (NAA), choline-containing compounds ( Cho), and creatine compounds (Cr) were measured and the ratios of NAA/Cr, Cho/Cr were determined. Results On right thalamus,the NAA/Cr ratio in negative subtype patients ( 1.40 ± 0.29 ) demonstrated lower than that in positive subtype ( 1.62 ± 0.33 ), the same phenomenon were appeared on male, female, non-first-episode, with-medicine and without-medicine patients (P ＜ 0.05 or 0.01 ). The Cho/Cr ratio on right thalamus in negative subtype of female,non-first-episode,without-medicine schizophrenics were lower than those in positive subtype (P ＜ 0.05 ).On left prefrontal lobe,left thalamus and right thalamus, the NAA/Cr ratios both in negative subtype and positive subtype schizophrenics were significantly negatively related with age of onset(P＜0. 05 or 0.01 ). In negative subtype schizophrenics,the Cho/Cr ratio on right thalamus was positively related with age of onset ( r = 0. 25, P ＜0.05 ). In negative subtype schizophrenics of non-first-episode, without-medicine, the correlation was negative between the NAA/Cr ratio and the course of disease( r= -0.48, -0.46, P＜0.05 ) ,and was positive between Cho/Cr ratio and the course of disease on right thalamus( r= 0.58,0.56, P＜ 0.01 ). Conlusion Compared with positive subtype schizophrenics,negative subtype schizophrenics have greater impairments on 1 H-MRS on right thalamus. The course of disease has greater effects on 1 H-MRS in negative subtype schizophrenics.