男性精神分裂症患者5-HT2A受体基因T102C多态性与迟发性运动障碍的关联

目的探讨5-羟色胺2A(5-HT2A)受体基因T102C多态性与精神分裂症伴迟发性运动障碍(TD)的相关性.方法用异常不自主运动量表(AIMS)评定男性精神分裂症患者;对42例符合TD(AIMS总分≥3分)者和与TD组严格相匹配的51例非TD者,采用简明精神病评定量表(BPRS)评定精神症状;应用聚合酶链反应-限制性片段长度多态性方法分析5-HT2A受体基因T102C多态性的分布频率.结果(1)经吻合度检验,TD组、非TD组的5-HT2A受体基因T102C多态性位点的基因型分布均符合Hardy-Weinberg平衡法则(χ2分别为0.06、0.02,ν均=2,P均＞0.05)(2)TD组与非TD组的基因型总体分布的差异无显著性(χ2=4.37,ν=2,P＞0.05),等位基因频率分布的差异有显著性(χ2=4.36,ν=1,P＜0.05).(3)TD组的AIMS和BPRS的评分分别为(6.5±1.8)分和(51.2±7.8)分,非TD组分别为0分和(50.3±7.4)分,差异无显著性(P＞0.05).结论5-HT2A受体基因的T102C多态性可能与男性精神分裂症患者的TD相关联.     

5-羟色胺2A受体基因多态性与抗抑郁药物治疗反应的关联研究

目的:探讨中国汉族抑郁症患者5-羟色胺2A(5-HT2A)受体基因rs6311多态性与抗抑郁药物疗效的关系。方法:对符合美国《诊断与统计手册:精神障碍》第四版(DSM-IV)重性抑郁障碍诊断标准的121例抑郁症患者予以艾司西酞普兰或帕罗西汀治疗,疗程6周。采用高温连接酶检测反应法(LDR)检测5-HT2A受体基因rs6311位点,分析其与抗抑郁药物疗效的关系。结果:①5-HT2A受体基因rs6311位点T等位基因、TT基因型在无效组的频率显著高于有效组(P<0.05)。②携带rs6311位点TT基因型患者的汉密尔顿抑郁量表(HAMD)减分值和减分率均显著低于携带CC基因型患者(P<0.05)。结论:5-HT2A受体基因rs6311位点多态性可能与5-羟色胺再摄取抑制剂(SSRIs)疗效有关,T等位基因、TT基因型可能为疗效差的预测因子。     

5-HTR2A基因启动子区-1438G/A多态性与抗精神病药源性肥胖的核心家系关联研究

目的探讨中国汉族首发精神分裂症(schizophrenia,SCH)患者抗精神病药物(antipsychoticagents,APS)治疗过程中体重增加是否与五羟色胺2A受体(5-hydroxytryptamine2Areceptor,5-HTR2A)基因启动区-1438G/A多态性相关。方法对84例首发精神分裂症患者(包含完整核心家系70个)APS(氯丙嗪或利培酮)单药治疗10周,治疗前后测量体重并计算体重指数。采用聚合酶链反应-限制性片段长度多态技术分析5-HTR2A基因启动区-1438G/A多态性基因型和等位基因分布频率,进行APS所致体重增加与5-HTR2A基因启动区-1438G/A多态性的相关分析、传递不平衡检验及数量性状传递不平衡检验。结果治疗10周后患者体重较基础体重增加(8.00±6.13)%。APS治疗10周后,体重增加≥7%和<7%患者组间,5-HTR2A基因-1438G/A多态性各基因型和等位基因分布频率差异均无统计学意义(P>0.05)。5-HTR2A基因-1438G/A多态性的各基因型之间各项指标的差异均无统计学意义(P>0.05);同时未发现5-HTR2A基因-1438G/A在不同体重增加组间存在传递不平衡。结论5-HTR2A基因-1438G/A多态性可能不是影响APS所致体重增加的主要遗传因素。     

大鼠神经系统内5-羟色胺2A受体亚型的免疫组织化学定位

目的：观察大鼠神经系统内5－羟色胺受体2A亚型（5－HT2AR）免疫组织化学染色阳性结构的分布。方法：5－HT2AR特异性抗体的免疫组织化学染色。结果：5－HT2AR阳性细胞体主要分布于嗅球的小球层和僧帽细胞层、海马始层、外侧缰核、丘脑背外侧核、下丘脑室旁核、中脑中央灰质、小脑浦肯野细胞、脑干运动核和感觉神经节等；5－HT2AR阳性纤维和终末主要分面于嗅球的小球层和内丛层、大脑皮质、外侧隔核、杏仁外侧核、丘脑网状核、腹侧顶盖区、桥核、下橄榄及脑干运动核等。结论：5－HT2AR亚型阳性结构广泛分布于大鼠神经系统，它们可能介导5－HT在神经系统中的多种生理功能。     

载脂蛋白A5基因-1131T〉C多态性与冠心病易感性的关联研究

目的探讨载脂蛋白A5(apoA5)-1131T>C单核苷酸多态性与冠心病(CAD)发病风险之间的关系.方法经冠状动脉造影确诊的江苏地区冠心病患者235例,同一地区正常对照262名,采用PCR-RFLP分析对 apoA5基因的-1131T>C多态进行检测,比较不同基因型与个体血脂水平和冠心病患病风险的关系.结果 -1131T>C单核苷酸多态位点等位基因T、C频率在CAD组和正常对照组中分别为59.57%、40.43%和65.65%、34.35%.CAD组中C等位基因的频率高于对照组(P<0.05).与-1131TT基因型者比较,CC基因型者的冠心病患病风险显著增加(OR＝1.872,95%CI＝1.039-3.376,P=0.037),用Logistic回归模型对个体的年龄、性别、体重指数和抽烟、高血压等因素后,其患病风险仍明显增加(OR＝2.285, 95%CI＝1.222-4.274).对照组中不同基因型个体血浆甘油三酯水平差异有统计学意义(P=0.007),携带C等位基因的个体TG水平显著高于TT基因型个体.结论 apoA5基因-1131T>C多态性C等位基因是中国人群中冠心病发病的危险因素之一,且与血浆TG水平的变化密切相关.     

5-羟色胺1A受体基因-1019C/G多态性与自杀行为关联的meta分析

目的:采用meta分析方法评价5-羟色胺1A受体(5-HTR1A)基因多态性与自杀行为相关的研究。方法:通过计算机检索Pub Med、Embase、Web of Science、中国生物医学文献数据库(CBM)、万方、维普、知网(CNKI)等中英文数据库,严格按照制定的纳入与排除标准,选择5-HTR1A基因多态性与自杀行为相关病例对照研究,检索范围为2003年12月30日-2013年12月30日。采用STATA12.0软件进行meta分析,计算优势比(OR)及其95%可信区间(95%CI),分析5-HTR1A基因多态性与自杀行为的关联性。结果:共纳入8项研究,包括1357例有自杀行为的患者及1675例正常对照。meta分析结果表明,5-HTR1A基因CG(-1019)多态性与自杀行为的相关有统计学意义(等位基因模型,OR=0.65,95%CI:0.46~0.92,P=0.015;显性基因模型,OR=0.76,95%CI:0.64~0.91,P=0.002)。根据种族进行亚组分析发现,在亚洲人群中5-HTR1A基因单核苷酸-1019 C/G多态性与自杀行为有显著关联(等位基因模型:OR=0.48,95%CI:0.25~0.93,P=0.029;显性基因模型:OR=0.37,95%CI:0.24~0.56,P0.001);而在高加索人群中5-HTR1A基因多态性与自杀行为无显著关联(等位基因模型:OR=0.71,95%CI:0.49~1.02,P=0.065;显性基因模型:OR=0.89,95%CI:0.73~1.08,P=0.247)。结论:本meta分析的结果提示5-HTR1A基因多态性与自杀行为的发生有关,其基因多态性可能是人们产生自杀行为的一个潜在危险因素。     

中国延边地区朝、汉族人群脯氨酸脱氢酶和5-羟色胺2A受体基因基因座遗传多态性

大量研究表明在精神疾病、心理疾病和药物依赖等过程中遗传因素起到重要作用。脯氨酸脱氢酶(proline dehydrogen-ase,PRODH)是把脯氨酸转化成Δ′pyrroline-5-carboxylate的一种线粒体酶,参与在线粒体膜中传递氧化还原电位的过程,除身体的其他部位之外,在脑中分布也相当广,PROD     

奥氮平治疗导致的体重增加和血糖、血脂升高与5-HT2A受体基因多态性的关系

目的 :探讨奥氮平治疗患者的体重增加和血糖、血脂改变与 5 -羟色胺 2A受体 (HTR2A)基因多态性T10 2C和 -14 3 8G A的关系。方法 :采用PCR -RFLP技术分析 5 7名奥氮平治疗的精神分裂症患者的HTR2A基因多态性T10 2C和 -14 3 8G A的频率。测定患者治疗前后的体重、血脂和血糖指标 ,并计算体重指数 (BMI)。分析基因型与各指标变化的相关性。结果 :治疗后患者体重平均增加 ( 4 2± 4 2 )kg ,或增加基础体重的 ( 7 5± 7 6) % ,体重变化的范围为 ( -3～ 15 )kg ,平均BMI变化值为 ( 1 5± 1 5 )kg m2 ,空腹血糖平均增加 ( 0 3± 0 7)mmol L ,血清甘油三脂和胆固醇平均增加分别为 ( 0 73± 1 0 5 )mmol L和 ( 0 5 9±0 65 )mmol L。突变型纯合子 -14 3 8A A比野生型纯合子 -14 3 8G G的体重增加更显著。结论 :HTR2A受体与奥氮平导致的体重增加有关 ,基因型 -14 3 8A A可预示服用奥氮平后体重增加。     

5-羟色胺2A受体与疼痛

5-羟色胺(5-HT)是一种内源性的活性物质,5-HT具有多种受体亚型。在中枢可以通过2A受体引起抑制性神经递质γ-丁氨酸（GABA ）等的释放，从而发挥镇痛作用；在外周参与伤害性感受器的活化,促进伤害性信息的传递。组织损伤以及炎症状态下,血小板和肥大细胞即释放5-HT。5-HT2A受体可介导5-HT引起的疼痛,该受体可以作为开发外周镇痛药物的重要靶点。     

大鼠海马内5-羟色胺及其受体5-HT2A的表达

目的:观察5-羟色胺(5-HT)纤维和5-HT2A受体在大鼠海马CA1、CA2和CA3三个区域的分布特点.方法:用5-HT递质和5-HT2A受体特异性抗体的免疫组织化学显色以及图像处理与分析.结果:在海马内,抗5-HT2A受体的免疫反应阳性产物主要位于锥体细胞的细胞膜和树突,树突染色较深;5-HT2A受体的阳性胞体在C...     

Lack of association of serotonin‐2A receptor gene polymorphism (T102C) with suicidal ideation and suicide

Serotonergic dysfunction has been implicated in the pathophysiology of affective disorders and suicidality. Especially the density of the 5‐HT2A receptor was claimed as being increased in suicidality, proposed as an adaptive upregulation due to reduced serotonergic transmission. Recent studies have shown an association of allele C of the 5‐HT2A‐T102C polymorphism with suicidal ideation in patients with major depression. The purpose of this study was to test whether this proposed marker indicates susceptibility not only to suicidal ideation in depressed patients but also to suicidality as a syndrome. We investigated the 5‐HT2A‐T102C polymorphism in 131 suicide victims with unknown underlying psychiatric diagnoses, 84 patients with major depression with or without suicidal ideation, and 125 healthy controls. We were unable to find any association of genotype or allele frequencies to major depression, suicidal ideation, or suicide as a syndrome. Thus, our results suggest that this polymorphism may not commonly be involved in the susceptibility to suicidality. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 96:831–835, 2000. © 2000 Wiley‐Liss, Inc.     

慢性应激抑郁模型大鼠脑内5-HT1A和5-HT2A受体的变化

为了在5-羟色胺受体水平研究抑郁症的机制和三环类抗抑郁药物(TCAs)阿米替林的药理学机理,将24只SD雄性大鼠随机均分为三组,即对照组、抑郁组、阿米替林治疗组.应用[3H]8-OH-DPAT、[3H]Ketanserin作为标记配基,采用放射性配体受体结合法,分别测定大鼠海马5-HT1A受体、大脑皮层5-HT2A受体结合.结果显示抑郁大鼠海马 [3H]8-OH-DPAT 特异性结合(18.78±5.62 fmol/mg prot),较正常对照组(26.12±5.52fmol/mg prot )明显下降(P＜0.05).抑郁大鼠大脑皮层[3H]Ketanserin特异性结合(112.58±4.21fmol/mg prot),较正常对照组(86.28±4.24fmol/mg prot)明显增加( P＜0.05).阿米替林治疗3周后,可使抑郁大鼠海马5-HT1A受体与大脑皮层5-HT2A受体结合恢复正常.提示 海马5-HT1A受体结合下降、大脑皮层5-HT2A受体结合增加可能与抑郁症病因有关;海马5-HT1A受体、大脑皮层5-HT2A受体是阿米替林发挥抗抑郁作用的环节.     

Association between 5-hydroxytryptamine 2A receptor gene polymorphism and postoperative analgesic requirements after major abdominal surgery

Although the serotonin (5-hydroxytryptamine (5-HT)) 2A receptor has been reported to be associated with pain, no relationship has been found between single nucleotide polymorphisms in the 5-HT2A receptor gene and analgesic requirements. To clarify the mechanism of individual differences in analgesic requirements, we investigated the relationship between the 5-HT2A 102T/C gene polymorphism and analgesic requirements in 135 patients who underwent major open abdominal surgery and were managed with continuous epidural analgesia with opioids after surgery. Genotyping was performed using polymerase chain reaction-restriction fragment length polymorphism. We found that the 102T/C polymorphism had significant main effects with regard to analgesic requirements. In addition, significant interaction effects were found between the 102T/C polymorphism and sex in terms of analgesic requirements. Among female subjects, patients with the T/T genotype of the 102T/C polymorphism had more analgesic requirements than those with the other genotypes. This finding suggests that the linkage disequilibrium block, which includes the 102T/C polymorphism of the 5-HT2A receptor gene, is involved in individual differences in analgesic requirements in women.     

The 5‐HT2A receptor gene 102T/C polymorphism is associated with suicidal behavior in depressed patients

Several lines of evidence suggest that genetic factors constitute an important determinant of suicidal behavior. A significant association between the 5‐HT_2A‐C allele and suicidality has recently been reported. The aim of this study was to investigate whether the proposed association between 5‐HT_2A‐102T/C polymorphism and suicidality could be replicated in a larger and independent sample of Spanish patients with major depression. The 102T/C polymorphism of the 5‐HT_2A receptor gene was analyzed in 159 patients with major depression (DSM‐IV criteria) and 164 unrelated and healthy controls using a case control design. All individuals were subjects of Spanish origin. Significant differences in allele (chi‐square = 4.13, df = 1, P = 0.04) and genotype (chi‐square = 6.19, df = 2, P = 0.04) distributions were found between non–suicide attempters and suicide attempters. Moreover, those patients carrying 5‐HT_2A‐C allele had more than five times the risk for attempting suicide than noncarriers (OR = 5.50, 95% CI = 1.18–35.20, P = 0.01). Our results replicate the proposed association between 5HT_2A‐C allele and suicidality in major depression. Moreover, no overall associations are detected when patients with major depression and controls are compared for 102T/C frequencies, suggesting that the increased risk for suicidality conferred by 5‐HT_2A‐C allele is primarily associated with suicidal behavior and not with the diagnosis of major depression itself. © 2001 Wiley‐Liss, Inc.     

Lack of an association between 5‐HT1A receptor gene structural polymorphisms and suicide victims

A serotonergic dysfunction in the brain has been reported to be involved in suicidal behavior independently of the presence of a specific psychiatric disorder. Serotonin 1A (5‐HT_1A) receptors are known to be located on serotonergic nerve terminals and to be involved in the presynaptic regulation of serotonin release. Genetic factors partly explain the risks for suicide, and a suicide completion group is thought to be more uniform than a suicide attempt group. To explore the hypothesis that the 5‐HT_1A receptor‐induced serotonergic dysfunction is implicated genetically in suicide, we focused on the structural polymorphisms, Pro16Leu and Gly272Asp, of the 5‐HT_1A receptor gene, and examined the association between suicide victims who completed suicide and these two polymorphisms. In both polymorphisms, we found no significant difference in genotype distribution or allele frequencies between suicide victims and controls. These findings suggest that neither of these two polymorphisms is associated with suicide victims and it is unlikely that the 5‐HT_1A receptor gene is implicated in the susceptibility to suicide. © 2002 Wiley‐Liss, Inc.     

Association analysis of the 5-HT2C receptor and 5-HT transporter genes in bipolar disorder

We selected 42 patients with bipolar disorder type I (BPI) and 40 healthy controls for genetic analysis of DNA polymorphisms in the serotonin receptor 2c (5-HTR2c) and serotonin transporter (5-HTT) genes. No significant associations were found in the total patient sample. However, when the individuals were divided according to gender, trends for association with both polymorphisms (P = 0.051 for 5-HTR2c and P = 0.049 for 5-HTT) in female patients were observed. These results suggest that variations in these genes may be responsible for a minor increase in susceptibility for bipolar disorder in women. Am. J. Med. Genet. 74:504–506, 1997. © 1997 Wiley-Liss, Inc.     

A family‐based study of the Cys23Ser 5HT2C serotonin receptor polymorphism in schizophrenia

The 5HT2C receptor has a high affinity for clozapine, a nontypical neuroleptic, and has therefore been postulated to play a role in mediating negative symptoms and neuroleptic response in schizophrenia. In the current study, the Cys23Ser 5HT2C serotonin receptor polymorphism was examined for linkage to schizophrenia by genotyping 207 nuclear families consisting of both parents and schizophrenic child and using the transmission disequilibrium test to examine possible preferential transmission of these alleles from 68 heterozygous mothers to their ill child. No evidence was obtained for preferential transmission of the Cys23Ser 5HT2C alleles in schizophrenia in either of the two main ethnic groups examined (German and Palestinian Arab) or in the combined cohort (TDT chi‐square = 0.00, NS). © 2001 Wiley‐Liss, Inc.     

Metabotropic glutamate mGlu2 receptor is necessary for the pharmacological and behavioral effects induced by hallucinogenic 5-HT2A receptor agonists

Hallucinogenic drugs, including mescaline, psilocybin and lysergic acid diethylamide (LSD), act at serotonin 5-HT2A receptors (5-HT2ARs). Metabotropic glutamate receptor 2/3 (mGluR2/3) ligands show efficacy in modulating the responses induced by activation of 5-HT2ARs. The formation of a 5-HT2AR-mGluR2 complex suggests a functional interaction that affects the hallucinogen-regulated cellular signaling pathways. Here, we tested the cellular and behavioral effects of hallucinogenic 5-HT2AR agonists in mGluR2 knockout (mGluR2-KO) mice. Mice were intraperitoneally injected with the hallucinogens DOI (2 mg/kg) and LSD (0.24 mg/kg), or vehicle. Head-twitch behavioral response, expression of c-fos, which is induced by all 5-HT2AR agonists, and expression of egr-2, which is hallucinogen-specific, were determined in wild type and mGluR2-KO mice. [(3)H]Ketanserin binding displacement curves by DOI were performed in mouse frontal cortex membrane preparations. Head twitch behavior was abolished in mGluR2-KO mice. The high-affinity binding site of DOI was undetected in mGluR2-KO mice. The hallucinogen DOI induced c-fos in both wild type and mGluR2-KO mice. However, the induction of egr-2 by DOI was eliminated in mGlu2-KO mice. These findings suggest that the 5-HT2AR-mGluR2 complex is necessary for the neuropsychological responses induced by hallucinogens.