[摘要] 目的 控制社會心理因素下,探討5-羥色胺轉(zhuǎn)運體基因多態(tài)性5-HTTLPR與重性抑郁癥(MD)嚴(yán)重程度及有無自殺觀念的關(guān)聯(lián)性。方法 采用病例對照研究,選取重性抑郁癥患者和正常對照患者各152例,分析5-HTTLPR與MD嚴(yán)重程度及自殺觀念的關(guān)聯(lián)性。結(jié)果 (1)5-HTTLPR不同基因型間HAMD總分差異無顯著性(P>0.05),以HAMD 24分為界將MD組分為兩個等級,基因型及等位基因在等級間分布差異無顯著性(P>0.05);控制社會心理因素下,以L/L基因型和L等位基因為參照,L/S的OR值為0.415,S/S的OR值為0.684,S等位基因的OR值為1.085(P>0.05)。(2)在MD有無自殺觀念兩組間,5-HTTLPR基因型及等位基因頻數(shù)分布均差異無顯著性(P>0.05);控制社會心理因素后,以L/L基因型和L等位基因為參照,L/S的OR值為0.439,S/S的OR值為2.83,S等位基因的OR值為1.470(P>0.05)。 結(jié)論 (1)5-HTTLPR可能與MD嚴(yán)重程度無關(guān)。(2)5-HTTLPR可能與MD自殺觀念無關(guān)。
[關(guān)鍵詞] 重性抑郁癥;自殺;5-羥色胺轉(zhuǎn)運體基因;社會心理因素
Study on relationship between 5-HTTLPR and severity and suicide idea of major depression in Chinese Han population
CUI Xiaohong,YANG Hong,REN Yan,et al.
The First Hospital of Shanxi Medical University,Taiyuan 030001,China
[Abstract] Objective To analyse the relationship between 5-HTTLPR and severity and suicide idea of major depression(MD) under control the effect of socialpsychic factors.Methods A casecontrol sample,including 152 MD patients and 152 controls, multivariate logistic regression were used to contro socialpsychic factors and compute odds ratio. Results (1)Taking social psychic factors as covariant, the comparison of HAMD score between 5-HTTLPR genotypes and alleles had no significant difference.There were no significant differences of the distribution of genotypes and alleles between two HAMD grades,and the OR values were not get statistical significance yet.(2)There were no significant differences of the distribution of 5-HTTLPR genotypes and alleles between suicidal idea group and nonsuicidal idea group,and the OR values were not get statistical significance yet.Conclusion Our study suggests that 5-HTTLPR may not correlate with severity and suicidal idea of MD.
[Key words] major depression;suicide;serotonin transporter gene;socialpsychic factor
抑郁癥由于其高患病率、高自殺率、高復(fù)發(fā)率及高疾病負(fù)擔(dān),近年來備受關(guān)注。其病因?qū)W研究,尤其是易感基因的相關(guān)研究已成為當(dāng)前熱點,5-羥色胺轉(zhuǎn)運體(5-HTT)基因則是熱點之一。目前研究發(fā)現(xiàn)與抑郁癥相關(guān)的5-HTT基因多態(tài)性主要有5個[1],其中以5端啟動子區(qū)長44bp的插入/缺失多態(tài)性(5-HTTLPR)研究較多,有研究表明該多態(tài)性與抑郁嚴(yán)重程度有關(guān),但文獻(xiàn)量極少,值得商榷;關(guān)于5-HTTLPR與自殺觀念的研究較多,但結(jié)論不一[2~4],大多數(shù)研究認(rèn)為,5-HTTLPR的S等位基因與自殺觀念及自殺行為有關(guān),還有少數(shù)研究得出陰性結(jié)果,個別研究還發(fā)現(xiàn)L等位基因與自殺有關(guān)。其原因可能在于MD是一種多因素疾病,其發(fā)病與人格、生活事件、社會支持及應(yīng)對方式等社會心理因素密切相關(guān),是多因素綜合作用的結(jié)果[5~7]。因此,關(guān)于基因多態(tài)性與MD的關(guān)聯(lián)性研究,若不考慮社會心理因素的影響,將很難獲得客觀的結(jié)論。因此,本研究采用1∶1配對病例對照研究設(shè)計,在控制社會心理因素后來探討5-HTTLPR與MD嚴(yán)重程度及自殺觀念的關(guān)聯(lián)性。
1 對象與方法
1.1 研究對象
MD病例組:2004年4月~2005年10月于山西醫(yī)科大學(xué)第一醫(yī)院精神衛(wèi)生科,就診的門診及住院患者,共計152例,其中男72例,女80例,年齡18~63歲,平均(32.29±12.16)歲。入組標(biāo)準(zhǔn):以遺傳學(xué)研究用診斷檢查(DIGS)作為篩查工具,DSMIV作為診斷標(biāo)準(zhǔn),HAMD(17項)評分大于17分。排除標(biāo)準(zhǔn):無遺傳性疾病及嚴(yán)重軀體性疾病,無其他精神障礙。受試者均知情同意,并簽署知情同意書。健康對照組:來源于同地區(qū)健康志愿者,共152例,其中男72例,女80例,年齡18~67歲,平均(30.47±12.45)歲。按同性別、年齡相差小于5歲為匹配條件,與患者組無親緣關(guān)系。無精神、軀體疾病及陽性精神疾病家族史。
[關(guān)鍵詞] 重性抑郁癥;自殺;5-羥色胺轉(zhuǎn)運體基因;社會心理因素
Study on relationship between 5-HTTLPR and severity and suicide idea of major depression in Chinese Han population
CUI Xiaohong,YANG Hong,REN Yan,et al.
The First Hospital of Shanxi Medical University,Taiyuan 030001,China
[Abstract] Objective To analyse the relationship between 5-HTTLPR and severity and suicide idea of major depression(MD) under control the effect of socialpsychic factors.Methods A casecontrol sample,including 152 MD patients and 152 controls, multivariate logistic regression were used to contro socialpsychic factors and compute odds ratio. Results (1)Taking social psychic factors as covariant, the comparison of HAMD score between 5-HTTLPR genotypes and alleles had no significant difference.There were no significant differences of the distribution of genotypes and alleles between two HAMD grades,and the OR values were not get statistical significance yet.(2)There were no significant differences of the distribution of 5-HTTLPR genotypes and alleles between suicidal idea group and nonsuicidal idea group,and the OR values were not get statistical significance yet.Conclusion Our study suggests that 5-HTTLPR may not correlate with severity and suicidal idea of MD.
[Key words] major depression;suicide;serotonin transporter gene;socialpsychic factor
抑郁癥由于其高患病率、高自殺率、高復(fù)發(fā)率及高疾病負(fù)擔(dān),近年來備受關(guān)注。其病因?qū)W研究,尤其是易感基因的相關(guān)研究已成為當(dāng)前熱點,5-羥色胺轉(zhuǎn)運體(5-HTT)基因則是熱點之一。目前研究發(fā)現(xiàn)與抑郁癥相關(guān)的5-HTT基因多態(tài)性主要有5個[1],其中以5端啟動子區(qū)長44bp的插入/缺失多態(tài)性(5-HTTLPR)研究較多,有研究表明該多態(tài)性與抑郁嚴(yán)重程度有關(guān),但文獻(xiàn)量極少,值得商榷;關(guān)于5-HTTLPR與自殺觀念的研究較多,但結(jié)論不一[2~4],大多數(shù)研究認(rèn)為,5-HTTLPR的S等位基因與自殺觀念及自殺行為有關(guān),還有少數(shù)研究得出陰性結(jié)果,個別研究還發(fā)現(xiàn)L等位基因與自殺有關(guān)。其原因可能在于MD是一種多因素疾病,其發(fā)病與人格、生活事件、社會支持及應(yīng)對方式等社會心理因素密切相關(guān),是多因素綜合作用的結(jié)果[5~7]。因此,關(guān)于基因多態(tài)性與MD的關(guān)聯(lián)性研究,若不考慮社會心理因素的影響,將很難獲得客觀的結(jié)論。因此,本研究采用1∶1配對病例對照研究設(shè)計,在控制社會心理因素后來探討5-HTTLPR與MD嚴(yán)重程度及自殺觀念的關(guān)聯(lián)性。
1 對象與方法
1.1 研究對象
MD病例組:2004年4月~2005年10月于山西醫(yī)科大學(xué)第一醫(yī)院精神衛(wèi)生科,就診的門診及住院患者,共計152例,其中男72例,女80例,年齡18~63歲,平均(32.29±12.16)歲。入組標(biāo)準(zhǔn):以遺傳學(xué)研究用診斷檢查(DIGS)作為篩查工具,DSMIV作為診斷標(biāo)準(zhǔn),HAMD(17項)評分大于17分。排除標(biāo)準(zhǔn):無遺傳性疾病及嚴(yán)重軀體性疾病,無其他精神障礙。受試者均知情同意,并簽署知情同意書。健康對照組:來源于同地區(qū)健康志愿者,共152例,其中男72例,女80例,年齡18~67歲,平均(30.47±12.45)歲。按同性別、年齡相差小于5歲為匹配條件,與患者組無親緣關(guān)系。無精神、軀體疾病及陽性精神疾病家族史。