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抑郁症患者血清尿酸降低与认知功能障碍的相关性.pdf
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抑郁症 患者 血清 尿酸 降低 认知 功能障碍 相关性
740第 53 卷温 州 医 科 大 学 学 报第 9 期2023-03-14温州市基础性科研项目(Y2020443)。黄子夜,副主任医师,Email:。土文珍,副主任医师,Email:。收稿日期:基金项目:作者简介:通信作者:抑郁症患者血清尿酸降低与认知功能障碍的相关性黄子夜1,郑克2,陈策1,土文珍11.温州市第七人民医院精神科,浙江温州325006;2.温州医科大学附属康宁医院精神科,浙江温州325000摘 要 目的:探索抑郁症患者血清尿酸变化及其与认知损伤之间的关系。方法:选取2022年1月至2022年12月温州市第七人民医院抑郁症住院患者及健康人共110例,分为抑郁症组(55例)及健康对照组(55例),采用重复性成套神经心理状态监测量表(RBANS)测量所有被试的认知功能,包括即刻记忆、视觉空间、言语功能、注意功能和延迟记忆,并检测血清尿酸。结果:控制协变量后,抑郁症组血清尿酸、即刻记忆、注意功能、言语功能、延迟记忆和RBANS总分均低于对照组,差异有统计学意义(P0.05);经过Bonferroni矫正后,2组间即刻记忆、言语功能和注意功能的差异仍有统计学意义(P0.05)。抑郁症组血清尿酸与即刻记忆(r=0.315,P=0.019)、注意功能(r=0.401,P=0.002)、言语功能(r=0.353,P=0.008)、延迟记忆(r=0.412,P=0.002)和RBANS总分(r=0.397,P=0.003)呈正相关。多元线性回归分析提示抑郁症组血清尿酸与言语功能(B=0.127,P=0.044)和注意功能(B=0.166,P=0.036)存在正相关。结论:降低的血清尿酸可能参与抑郁症认知损伤的病理过程。关键词 尿酸;抑郁症;认知功能中图分类号R749.4 DOI:10.3969/j.issn.2095-9400.2023.09.008The correlation between reduced serum uric acid levels and cognitive impairment in patients with depressive disorder HUANG Ziye1,ZHENGKe2,CHEN Ce1,TUWenzhen1.1.DepartmentofPsychiatry,theSeventhPeoplesHospitalofWenzhou,Wenzhou325006,China;2.DepartmentofPsychiatry,KangningHospitalAffiliatedtoWenzhouMedicalUniversity,Wenzhou325000,China Abstract:Objective:To explore the changes in serum uric acid(SUA)levels and their relationship with cognitive impairment in patients with depression.Methods:A total of 110 depressive patients and healthy adults were recruited from January 2022 to December 2022 at the Seventh Peoples Hospital of Wenzhou,who were divided as depression group(55)and a healthy control group(55).Repeatable Battery for the Assessment of Neuropsychological(RBANS)was used to assess the cognitive functions of the two groups,including immediate memory,visuospatial,language function,attention function,delayed memory,and SUA levels were also estimated.Results:After controlling covariates,the SUA levels,immediate memory,attention function,language function,delayed memory,and total RBANS score of the depression group were lower than those of the control group,with statistically significant difference(P0.05).After Bonferroni correction,there were still significant differences between the two groups in immediate memory,language function,and attention(P0.05).There was a positive correlation between SUA levels and immediate memory(r=0.315,P=0.019),attention function(r=0.401,P=0.002),language function(r=0.353,P=0.008),delayed memory(r=0.412,P=0.002),and RBANS total score(r=0.397,P=0.003)in the depression group.Multiple linear regression suggested a positive correlation between SUA levels and language(B=0.127,P=0.044)and attention function(B=0.166,P=0.036)in patients with depression.Conclusion:Our results suggest that reduced SUA levels might be implicated in the pathophysiology of cognitive impairment in depressive disorder.Key words:uric acid;depressive disorder;cognitive functions本文引用:黄子夜,郑克,陈策,等.抑郁症患者血清尿酸降低与认知功能障碍的相关性J.温州医科大 学学报,2023,53(9):740-743,748.论 著Vol.53 No.9Sep.2023第53卷第9期2023年9月温 州 医 科 大 学 学 报Journal of Wenzhou Medical University741第 9 期第 53 卷抑郁症是精神科常见病,氧化和抗氧化失衡所导致的氧化应激损伤是其发病原因之一1-2。研究显示尿酸作为非酶类抗氧化因子在抑郁症患者中明显下降,并且尿酸越低,抑郁症状越重3-4。这说明血清尿酸可能参与抑郁症的发病过程。抑郁症的核心症状除了情绪低落、思维迟缓和意志减退外,还有认知损伤。有研究提示血清尿酸与认知功能呈正相关5,甚至下降的尿酸水平是阿尔茨海默病性认知功能障碍的危险因素6。上述报道均说明尿酸可能对认知损伤具有保护作用。然而,针对抑郁症患者血清尿酸变化和认知损伤相关性的研究鲜见报道。本研究分析抑郁症患者与健康对照组之间在基线资料、认知功能及血清尿酸水平的差异,并进一步探究抑郁症患者血清尿酸水平与认知损伤之间的关系,以期能够为抑郁症认知损伤的治疗提供新思路。1 对象和方法1.1 研究对象1.1.1 抑郁症组:选取2022年1月至2022年12月温州市第七人民医院抑郁症住院患者55例。纳入标准:符合美国精神疾病诊断与统计手册第五版(diagnosticandstatisticalmanualofmentaldisorders,DSM-V)抑郁症诊断标准;年龄1860岁;签署由温州市第七人民医院伦理委员会审批的知情同意书。排除标准:严重脑/躯体疾病或精神障碍者;多种物质滥用(尼古丁除外);依从性差者。本研究经温州市第七人民医院伦理委员会审批。1.1.2 对照组:招募温州市第七人民医院体检中心健康人55例。纳入标准:无物质滥用(尼古丁除外);年龄1860岁;自愿签署知情同意书。排除标准:合并物质滥用或依赖者(包括酒精滥用或依赖);存在严重躯体疾病或脑器质性疾病者;精神障碍者。1.2 方法1.2.1 自制一般情况调查表:采集所有被试性别、年龄、受教育年限、身体质量指数(bodymass index,BMI)和吸烟状况。同时,收集抑郁症患者病程、住院次数和服药情况。1.2.2 重复成套神经心理学测试量表(repeatable b a t t e r y f o r t h e a s s e s s m e n t o fneuropsychologicalstatus,RBANS):该量表共12个分测试,其中词汇学习和故事复述归为即刻记忆;图形临摹和线条定位归为视觉空间;画图命名和词语流畅性归为言语功能;数字广度和编码测试归为注意功能;词汇回忆、词汇再认、故事回忆和图形回忆归为延迟记忆;最终通过查RBANS评分表得到RBANS总分。量表总得分越低,提示认知功能越差。该量表Cronbachs系数为0.90,即刻记忆、视觉空间、言语功能、注意功能、延迟记忆分量表的Cronbachs系数分别为0.86、0.68、0.67、0.85、0.80,总量表及各分量表内部一致性均较好7。1.2.3 尿酸水平检测:采集所有被试清晨空腹68时的肘静脉血5mL,于2h内采用酸酶-过氧化物法检测血清尿酸。1.3 统计学处理方法 采用SPSS23.0统计软件进行分析。不符合正态分布的计量资料以M(P25,P75)表示;符合正态分布的计量资料用 s表示,2组间比较采用独立样本t检验,以基线资料作为协变量对2组间尿酸水平和认知功能进行协方差分析,多重比较的矫正采用Bonferroni矫正;计数资料用频数(构成比)进行统计描述,2组间比较采用2检验;相关性分析采用Pearson相关分析,回归方程选择多元线性回归分析。P0.05为差异有统计学意义。2 结果2.1 2组间一般基线资料比较 抑郁症组55例,其中男14例,女41例;吸烟9例,不吸烟46例;年龄1859岁,平均(37.859.65)岁;受教育年限514年,平均(9.693.35)年;BMI为15.2222.97kg/m2,平均(21.203.12)kg/m2;病程1240个月,平均24(3,84)个月;住院次数14次,平均1(1,2)次;服用SSRI类药物42例,SNRI类药物13例。对照组55例,其中男14例,女41例;吸烟9例,不吸烟46例;年龄1960岁,平均(37.989.37)岁;受教育年限521年,平均(13.163.31)年;BMI为18.0228.13kg/m2,平均(22.432.87)kg/m2;抑郁症组BMI(t=-2.15,P=0.034)和受教育年限(t=-5.47,P0.001)均低于对照组,差异有统计学意义。2组间的性别构成(2=0,P=1.000)、吸烟情况(2=0,P=1.000)和年龄(F=0.005,P=0.945),差异无统计学意义。2.2 2组间认知功能和尿酸的比较 抑郁症组即刻记忆(t=-5.28,P0.001)、注意功能(t=-4.89,黄子夜,等:抑郁症患者血清尿酸降低与认知功能障碍的相关性742第 53 卷温 州 医 科 大 学 学 报第 9 期P0.001)、言语功能(t=-5.61,P0.001)、延迟记忆(t=-4.60,P0.001)、RBANS总分(t=-4.99,P0.001)和血清尿酸(t=-8.93,P0.001)均低于对照组,差异有统计学意义。将性别、年龄、受教育年限、BMI和吸烟情况作为变量控制后,上述差异仍有统计学意义(P0.05),将RBANS的6个维度进行多重比较的Bonferroni矫正后,2组间即刻记忆、注意功能和言语功能的差异仍有统计学意义(P0.05),见表1。2.3 抑郁症组血清尿酸和基线资料跟认知功能之间的相关性分析 Pearson相关分析发现,抑郁症组血清尿酸与即刻记忆(r=0.315,P=0.019)、注意功能(r=0.401,P=0.002)、言语功能(r=0.353,P=0.008)、延迟记忆(r=0.412,P=0.002)和RBANS总分(r=0.397,P=0.003)呈正相关,差异有统计学意义;受教育年限与即刻记忆(r=0.451,P0.001)、注意功能(r=0.416,P=0.002)、言语功能(r=0.450,P0.001)、延迟记忆(r=0.286,P=0.034)和RBANS总分(r=0.422,P=0.001)呈正相关,差异有统计学意义;年龄与即刻记忆(r=-0.371,P=0.005)、注意功能(r=-0.305,P=0.023)和RBANS总分(r=-0.291,P=0.003)呈负相关,差异有统计学意义,见表2。表1 2组间RBANS和血清尿酸比较(每组n=55,s)组别即刻记忆视觉空间注意功能言语功能延迟记忆RBANS总分尿酸(mol/L)抑郁症组71.3316.5281.5611.7091.6217.5778.1313.2278.0918.7375.1615.09262.2038.61对照组88.4417.4278.5513.65107.2515.8993.2214.9490.89 8.6488.5112.89332.6545.46Fa7.4301.6588.6768.2575.9925.87292.458Pa0.0080.2010.0040.0050.0160.0170.001Pb0.0481.2060.0240.0300.0960.102注:a:将性别、年龄、文化程度、吸烟状况和BMI作为协变量后得出的F值和P值;b:经过Bonferroni矫正表2 抑郁症组基线资料和尿酸跟认知功能的Pearson相关分析结果(n=55,r)变量血清尿酸年龄受教育年限BMI病程住院次数即刻记忆0.315a-0.371a0.451b0.035-0.190-0.259视觉空间0.243-0.1940.029-0.550-0.024-0.054注意功能0.401b-0.305a0.416b-0.112-0.0460.012言语功能0.353a-0.2540.450b0.0130.030-0.064延迟记忆0.412b-0.1780.286a0.1400.021-0.154RBANS总分0.397a-0.291a0.422b-0.030-0.026-0.087注:aP0.05,bP0.012.4 抑郁症组基线资料和血清尿酸跟认知功能的多元线性回归分析 将抑郁症患者即刻记忆、视觉空间、注意功能、言语功能、延迟记忆和RBANS总分作为因变量,血清尿酸、性别、年龄、受教育年限、BMI、病程、住院次数、吸烟情况和药物情况作为自变量纳入多元线性回归方程后,发现受教育年限和尿酸是抑郁症患者注意功能(t=2.330,P=0.024;t=2.167,P=0.036)和言语功能(t=2.915,P=0.006;t=2.167,P=0.036)的保护性因素,见表3和表4。3 讨论尿酸作为人体重要的非酶类抗氧化因子,不仅能在外周清除60%氮类过氧化物和自由基8,并且能在中枢神经系统发挥抗氧化作用9。BARTOLI等3研究发现抑郁症患者血清尿酸水平低于健康对照。国内研究4,10也得出相同的结论,同时还发现下降表3 抑郁症组尿酸、基线资料跟注意功能的多元线性回归分析结果(n=55)项目BtP常量96.0152.5660.014性别(男/女)-11.350-1.3250.192年龄(岁)-0.398-1.5730.123受教育年限(年)1.5152.3300.024BMI(kg/m2)-0.758-1.0760.288吸烟(吸烟/非吸烟)-11.681-1.3580.181病程(月)0.0130.3170.752住院次数(次)-0.065-0.0200.984药物(SSRI/SNRI)-8.504-1.6190.112尿酸(mol/L)0.1662.1670.036注:R2=0.402,F=3.359743第 9 期第 53 卷的血清尿酸加重抑郁症患者抑郁症状10和自杀企图4。动物实验研究发现大鼠血清尿酸越低,抑郁行为越严重11。上述报道均说明血清尿酸参与抑郁症的病理生理过程,可能的原因是氧化应激导致抑郁症患者脂质过氧化和自由基增加,同时抗氧化能力下降12-13,因此引发血清尿酸下降。然而,葛晓丹等14研究发现抑郁症患者血清尿酸高于健康对照,因此抑郁症患者血清尿酸的变化仍有待于进一步研究。认知损伤在抑郁症患者中很常见15。涂献珠等16发现抑郁症患者即刻记忆、言语功能和注意功能均低于健康对照组,这与本研究结果一致。有研究指出氧化应激损伤导致抑郁症患者海马和前额叶皮层萎缩17。同时还有研究18-19显示抑郁症硫还原蛋白和还原性谷胱甘肽下降,并且和认知损伤呈正相关。这说明氧化应激损伤导致抑郁症患者大脑结构和功能改变,从而引发认知损伤。多项研究均指出尿酸的抗氧化特性使其具有神经保护作用,从而改善认知损伤5-6。同时,CAO等5采用安登布鲁克认知检查-修订版测量多发性硬化患者后发现降低的尿酸加重患者的言语和注意功能损伤,这与本研究结果一致。AOYAMA等20发现大鼠腹腔注射尿酸,其海马区的还原性谷胱甘肽明显增加。动物实验研究还发现大鼠尾静脉注射尿酸可以减轻大脑皮层Nrf-2信号通路介导的氧化应激损伤,并且还能提高脑源性神经营养因子和神经生长因子表达21。因此尿酸可能通过减轻氧化应激损伤和提高神经营养因子表达实现神经保护,进而改善认知损伤。同时,本研究发现受教育年限和言语及注意表4 抑郁症组尿酸、基线资料跟言语功能的多元线性回归分析结果(n=55)项目BtP常量33.5621.1210.268性别(男/女)3.3040.4820.632年龄(岁)-0.165-0.8120.421受教育年限(年)1.5172.9150.006BMI(kg/m2)0.0030.0050.996吸烟(吸烟/非吸烟)1.0150.1470.883病程(月)0.0160.4830.632住院次数(次)-1.099-0.4240.674药物(SSRI/SNRI)-1.925-0.4580.649尿酸(mol/L)0.1272.0700.044注:R2=0.323,F=2.388功能呈正相关。LVDN等22提出受教育年限能明显提高被试的认知学习技巧,甚至可以减弱老化对认知功能的影响。综上所述,抑郁症血清尿酸可能是认知损伤的保护性因素,特别是言语和注意功能。但本研究仍存在些许不足,未来可以加大样本量,进行纵向病例对照研究,为该现象找出确切的机制。参考文献1 BEHL T,RANA T,ALOTAIBI G H,et al.Polyphenols inhibiting MAPK signalling pathway mediated oxidative stress and inflammation in depressionJ.Biomed Pharmacother,2022,146:112545.2 SOMANI A,SINGH A K,GUPTA B,et al.Oxidative and nitrosative stress in major depressive disorder:A case control studyJ.Brain Sci,2022,12(2):144.3 BARTOLI F,TROTTA G,CROCAMO C,et al.Antioxidant uric acid in treated and untreated subjects with major depressive disorder:A meta-analysis and meta-regressionJ.Eur Arch Psychiatry Clin Neurosci,2018,268(2):119-127.4 KONG Y,LIU C,ZHANG C,et 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