The selective 5-HTIA receptor antagonist WAY-100635 inhibits neuronal activity of the ventromedial prefrontal cortex in a rodent model of Parkinson's disease

Objective The ventral part of the medial prefrontal cortex（mPFC）plays an important role in initiation and control of voluntary movement,mood and cognition.However,after the degeneration of the nigrostriatal pathway,the neuronal activity of the ventral mPFC and the role of serotonin1A（5-hydroxytryptamine,5-HT1A）receptors in the firing of the neurons are still unknown.The present study is to investigate the change of neuronal activity in the ventral mPFC and the effect of systemic administration of the selective 5-HT1Areceptor antagonist WAY-100635 on the activity of the neurons in normal and 6-hydroxydopamine（6-OHDA）-lesioned rats.Methods Single unit responses were recorded extracellularly with glass microelectrodes from ventral mPFC neurons in normal rats and 6-OHDA unilaterally lesiond rats in vivo.Results 6-OHDA lesion of the substantia nigra pars compacta（SNc）significantly increased the firing rate with no change in the firing pattern of neurons of the ventral mPFC in rats.Systemic administration of WAY-100635（0.1 mg/kg,i.v.）did not change the mean firing rate and firing pattern of ventral mPFC neurons in normal rats.In contrast,WAY-100635 signifi- cantly decreased the mean firing rate of the neurons in rats with 6-OHDA lesion of the SNc.Conclusion These data suggest that the degeneration of the nigrostriatal pathway results in an increase of neuronal activity of ventral mPFC and dysfunction of 5-HT1Areceptor.

C-X-C chemokine receptor type 5+CD8+T cells as immune regulators in hepatitis Be antigen-positive chronic hepatitis B under interferonalpha treatment

BACKGROUND C-X-C chemokine receptor type 5(CXCR5)+CD8+T cells represent a unique immune subset with dual roles,functioning as cytotoxic cells in persistent viral infections while promoting B cell responses.Despite their importance,the specific role of CXCR5+CD8+T cells in chronic hepatitis B(CHB),particularly during interferon-alpha(IFN-α)treatment,is not fully understood.This study aims to elucidate the relationship between CXCR5+CD8+T cells and sustained serologic response(SR)in patients undergoing 48 weeks of pegylated IFN-α(peg-IFN-α)treatment for CHB.AIM To elucidate the relationship between CXCR5+CD8+T cells and sustained SR in patients undergoing 48 weeks of peg-IFN-αtreatment for CHB.METHODS This study enrolled 60 patients with hepatitis Be antigen(HBeAg)-positive CHB undergoing 48 weeks of peg-IFN-αtreatment.Participants were assessed for eligibility based on criteria such as persistent HBsAg-positive status for at least six months,HBeAb-negative,hepatitis B virus DNA levels exceeding 2×104 copies/mL,and alanine aminotransferase(ALT)levels between 2 and 10 times the upper limit of normal.Blood samples were collected at baseline and at weeks 12,24,48,and a 24-week treatment-free follow-up(week 72)to measure serum interleukin(IL)-21 concentration via ELISA and to analyze CXCR5 and programmed death-ligand 1(PD-L1)expression on CD8+T cells by flow cytometry,CXCR5 is a chemokine receptor that directs immune cells to specific tissues,while PD-L1 is a protein that regulates immune responses by inhibiting T cell activity.RESULTS Patients with CHB exhibited significantly lower levels of circulating CXCR5+CD8+T cells compared to healthy controls(P<0.01).Notably,CXCR5+CD8+T cells were prominently expressed in patients who achieved sustained SR compared to non-SR(NSR).A significant correlation was observed between CXCR5 and PD-L1 expression(r=-0.189,P=0.002).However,there was no significant correlation between serum IL-21 levels and CXCR5+CD8+lymphocytes(r=-0.03,P=0.625)or serum ALT levels(r=0.026,P=0.678).CONCLUSION The enhanced expression of CXCR5+CD8+T cells in patients achieving HBeAg seroconversion during IFN-αtreatment suggests that these cells play a crucial role in antiviral immune responses against hepatitis B.This study highlights the potential of CXCR5+CD8+T cells as immune regulators in CHB,which may inform future therapeutic strategies to optimize antiviral treatments.

5-HT1A受体拮抗剂对七氟烷致老年认知功能障碍模型大鼠突触可塑性的作用及其机制

目的探讨5-HT1A受体拮抗剂对七氟烷致老年认知功能障碍模型大鼠突触可塑性的作用及其机制。方法将30只18月龄Sprague-Dawley大鼠随机分为对照组、模型组以及治疗组。模型组吸入50%空气、氧气混合物(2 L/min)和2%七氟烷4 h后左侧脑室给予生理盐水(5μL),治疗组在吸入50%空气、氧气混合物(2 L/min)和2%七氟烷4 h后左侧脑室给予5-HT1A受体拮抗剂(3μg),对照组仅吸入50%空气、氧气混合物(2 L/min)4 h。水迷宫法检测各组大鼠的学习记忆能力;HE染色法观察各组大鼠海马组织病理变化情况;尼氏染色和高尔基染色观察海马区神经元和突触的病理形态变化;免疫荧光法检测MeCP2、p250GAP、PSD-95、GAP-43与Syn蛋白表达;实时荧光定量PCR检测PKA、CREB1、BDNF mRNA表达水平;Western blotting检测PKA、CREB1、p-CREB1、BDNF蛋白表达水平。结果与对照组比较,模型组大鼠逃避潜伏期显著延长,穿越平台次数显著减少(P<0.05);与模型组比较,治疗组大鼠逃避潜伏期显著缩短,穿越平台次数明显增多(P<0.05)。HE、尼氏和高尔基染色显示,与对照组比较,模型组大鼠海马神经元形态不规则,排列松散,周围组织间隙扩大,细胞核固缩深染,部分神经元内尼氏体减少,树突分支数量以及树突棘密度明显减少;与模型组比较,治疗组大鼠海马神经元形态规则,结构相对完整,排列均匀,神经元内尼氏体数量增多,树突分支数量及树突棘密度显著增加。与对照组比较,模型组大鼠脑组织MeCP2、PSD-95、GAP-43、Syn蛋白,PKA、CREB1、BDNF mRNA和蛋白表达明显减少(P<0.05),p250GAP蛋白表达明显增加(P<0.05)。与模型组比较,治疗组MeCP2、PSD-95、GAP-43、Syn蛋白,PKA、CREB1、BDNF mRNA和蛋白表达明显增加(P<0.05),p250GAP蛋白表达明显减少(P<0.05)。结论5-HT1A受体拮抗剂通过激活CREB/BDNF通路,增强PSD-95、GAP-43、Syn表达,促进突触重塑,保护大鼠海马神经元细胞,从而改善七氟烷致老年认知功能障碍模型大鼠的学习记忆能力。

Augmentative effect of tetrandrine on pentobarbital hypnosis mediated by 5-HT_(1A) and 5-HT_(2A/2C) receptors in mice

It has been reported that augmentative effect of tetrandrine on pentobarbital hypnosis in mice may be related to serotonergic system. The present study was undertaken to investigate the interaction of tetrandrine and different 5-HT receptors on pentobarbital-induced sleep by using the loss-of-righting reflex method. The results showed that augmentative effect of tetrandrine on pentobarbital hypnosis in mice were potentiated by the p-MPPI （5-HT1A receptor antagonist） （1 mg/kg, i.p.） and ketanserin （5-HT2A/2C receptor antagonist） （1.5 mg/kg, i.p.）, respectively. Pretreatment with either 8-OH-DPAT （5-HT1A receptor agonist） （0.1 mg/kg, s.c.） or DOI （5-HT2A/2C receptor agonist） （0.2 mg/kg, i.p.） significantly decreased pentobarbital-induced sleep time, and tetrandrine （60 mg/kg, i.g.） significantly reversed this effect. These results suggest that both the 5-HTLA and 5-HT2A/2C subfamily may be involved in the potentiating mechanism of tetrandrine＇s effects on pantobarbital hypnosis.

直接巢式PCR结合测序检测5-HT1A基因C-1019G多态性的方法的建立

目的:5-HT1A基因C-1019G多态性与多种神经精神疾病如抑郁症、精神分裂症、焦虑症等的发生风险、症状严重程度及治疗效果存在关联。本研究旨在建立一种直接巢式PCR结合测序检测该位点的方法。方法:以口腔上皮细胞粗处理物为材料,通过直接巢式PCR扩增包含5-HT1A基因C-1019G位点的靶片段,PCR产物经桑格测序鉴定基因型。结果:所检样本均能扩增出预期大小的PCR产物,测序峰图清晰。结论:成功建立了一种直接巢式PCR结合测序鉴定5-HT1A基因型的方法,有良好的应用前景。Objective: The C-1019G polymorphism of the 5-HT1A gene has been associated with the risk of occurrence, symptom severity, and treatment outcome of a variety of neuropsychiatric disorders, such as depression, schizophrenia, and anxiety disorders. The aim of this study was to establish a direct nested PCR combined with sequencing to detect this locus. Methods: The target fragment containing the C-1019G locus of the 5-HT1A gene was amplified by direct nested PCR using crude processed oral epithelial cells, and the PCR product was genotyped by Sanger sequencing. Results: PCR products of expected size were amplified from all the samples tested, and the sequencing peaks were clear. Conclusion: A direct nested PCR combined with sequencing method was successfully established to identify the genotypes of 5-HT1A gene, which has good prospects for application.

5-HT1A基因C-1019G多态位点的研究进展

5-HT1A基因编码5-羟色胺(血清素)的G蛋白偶联受体(属于5-羟色胺受体亚家族)。C-1019G多态位点是5-HT1A基因启动子区一个重要的功能性多态位点,人群中存在3种基因型即CC、CG、GG,它与个体的恋爱关系及抑郁症、焦虑症等精神疾病密切相关。本文对5-HT1A基因C-1019G多态位点的相关机制、检测方法、研究进展等进行综述。The 5-HT1A gene encodes a G protein-coupled receptor for serotonin, which belongs to the 5-hydroxytryptamine receptor subfamily. C-1019G polymorphism is an important functional poly-morphism in the promoter region of 5-HT1A gene. There are three genotypes (CC, CG and GG) in the population, which are closely related to individual’s romantic relationship and mental disorders such as depression and anxiety. In this paper, the mechanism, detection methods and research progress of C-1019G polymorphism of 5-HT1A gene were reviewed.

许氏平鲉5-HT1A基因单核苷酸多态性与攻击行为表型相关性研究

以许氏平鲉(Sebastes schlegelii)幼鱼为研究对象,旨在探究5-HT1A受体基因在攻击行为调控中的作用。首先,通过注射8-OH-DPAT(特异性5-HT1A受体激动剂)对许氏平鲉幼鱼的攻击行为进行了分析,评估了受体对幼鱼攻击行为的影响;其次,对不同攻击表型的许氏平鲉幼鱼进行了5-HT1A受体基因的多态性位点筛选,以期获得与许氏平鲉攻击行为显著相关的潜在SNP标记。结果显示:(1)8-OH-DPAT处理组幼鱼攻击行为的频率和时间显著低于对照组(P<0.05),但攻击潜伏期显著高于对照组(P<0.05);(2)在5-HT1Aα启动子区域中发现了7个与攻击表型差异显著相关的多态性位点(P<0.05),分别为SNP 1236、SNP 1245、SNP 1260、SNP1301、SNP 1302、SNP 1309和SNP 1330位点;在5-HT1Aβ启动子区域中发现了2个与攻击表型差异显著相关的多态性位点(P<0.05),分别为SNP 892和SNP 1147位点,但在5-HT1A基因CDS编码区并未发现与攻击差异表型显著相关的多态性位点(P>0.05)。综上所述,研究结果证明了5-HT1A受体的激活能够显著抑制许氏平鲉的攻击行为,筛选了与攻击性差异个体相关的5-HT1A受体基因SNP位点。

Targeted to medication-induced dyskinesia and tardive dyskinesia:A role of 5-HT_(1A) receptor

Objective To outline the recent progress in drug discovery for medication-induced dyskinesia(Parkinson disease,PD)and tardive diskinesia(schizophrenia)with emphasizing the role of 5-HT1A receptor.Methods Development of extrapyramidal syndrome(EPS)followed either chronic L-DOPA administration in PD(L-DOPA-induced dyskinesia,LID)or antipsychotic treatment in schizophrenia(Tardive dyskinesia,TD)remains a challenge in the clinical practice and drug discovery.In addition to the abnormal dopamine activity in the nigrostrial area that contributes to the LID or TD,recent information indicates that 5-HT1A receptor also plays an important role which is merging as promising target in treatment of LID or TD.Results l-Stepholidine(l-SPD),isolated from the Chinese herb Stephania,is known as a dual dopamine receptor agent(D1 receptor agonistic and D2 antagonistic activity).In addition,we further demonstrated that l-SPD binds to 5-HT1A receptor and exhibits a partial agonistic activity.In LID rat model,l-SPD not only attenuated the development of L-DOPA-induced dyskinesia(LID),but also relived the established LID.The effect of l-SPD on LID was completely blocked by pretreatment of 5-HT1A receptor antagonist,indicating the role of 5-HT1A receptor.Furthermore,we designed and synthesis a dual dopamine/5-HT1A receptor agonist MCL-135,which also exhibits a significant relief on LID while elicits its antiparkinsonian action.Conclusions 5-HT1A receptor plys an important role in the development of LID,targeted to dual dopamine/5-HT receptor may represent a promising strategy for drug design and discovery in LID and TD treatment.

Rivastigmine Restores 5-HT_1AReceptor Levels in the Hippocampus of Olfactory Bulbectomized Mice

Rivastigmine, a dual acetylcholinesterase and butyrylcholinesterase inhibitor, is used for symptomatic treatment of patients with mild to moderately severe dementia in Alzheimer’s disease (AD) patients. In the present study, we found that 5-HT1A receptor (5-HT1AR) is downregulated, whereas 5-HT2A receptor (5-HT2AR) is upregulated in the hippocampal dentate gyrus (DG) and CA1 region by olfactory bulbectomy (OBX) in mice. Furthermore, chronic treatment with rivastigmine (1.0 mg/kg) for 2 weeks starting 2 weeks after OBX operation restored the decreased 5-HT1AR and the increased 5-HT2AR levels. To determine whether cholinergic receptor stimulation by rivastigmine is involved in the rivastigmine-induced regulation of 5-HTR levels, we treated the mice with mecamylamine (2.5 mg/kg), or atropine (5.0 mg/kg) with rivastigmine (1.0 mg/kg) once a day for 2 weeks. Notably, the rivastigmine-induced 5-HT1AR upregulation was eliminated by mecamylamine but not by atropine treatments. On the other hand, the restored 5-HT2AR level by rivastigmine was not affected by either mecamylamine or atropine. Treatment with 8-OH-DPAT, a selective 5-HT1AR agonist improved the decreased 5-HT1AR and the increased 5-HT2AR levels in OBX mice. On the other hand, treatment with TCB-2, a potent 5-HT2AR agonist had no effects on the 5-HT1AR and 5-HT2AR dysregulation in OBX mice. Taken together, nicotinic acetylcholine receptor (nAChR) stimulation mediates rivastigmine-induced upregulation of 5-HT1AR. Therefore, we speculate that the increased ACh levels by rivastigmine can stimulate nAChR located on serotonergic nerve terminals and stimulate 5-HT1AR by the enhanced 5-HT release in the hippocampus. The 5-HT1AR stimulation likely mediates the improvement of 5-HT1AR levels as auto-receptor in OBX hippocampus.

Systematic Screening of the Serotonin Receptor 1A (5-HT1A) Gene in Chronic Tinnitus

Objective Chronic tinnitus is a highly prevalent condition and has been hypothesized to result from an innate disturbance in central nervous serotonergic transmission. Given the frequent comorbidity with major depression and anxiety, we argue that candidate genes for these disorders are likely to overlap. The present study addresses the gene encoding for the 5-HT1A receptor as a putative risk factor for tinnitus. Methods In 88 subjects with a diagnosis of chronic subjective tinnitus who underwent a detailed neurootological examination, the entire 5-HT1A gene was amplified using overlapping PCR products. Amplicons were custom sequenced bidirectionally and were screened for variants in multiple alignments against the human genome reference. Results We identified a synonymous C > T exchange at residue 184 (Pro) in 7/88 subjects, but detected no missense variants in the population under study. Specifically, the following residues were fully conserved: 16 (Pro), 22(Gly), 28(Ile), 98 (Val), 220(Arg), 267 (Val), 273 (Gly), and 418 (Asn). Discussion The present data count against the causation of chronic tinnitus by a change in the 5-HT1A receptor’s amino acid sequence. However, the allele frequency for the 184Pro minor allele (0.04) reached twice the frequency reported in control cohorts from the same ethnicity. Additional investigations are invited to clarify the role of the 5-HT1A polymorphism in larger samples, and to control for comorbid affective disorders.

Effects of Activation and Blockade of Serotonin 5-HT1A Receptors on the Immune Response in Rats Selected for Different Levels of Aggressiveness

The present study examines the effects of serotonin (5-HT) 1A receptor ligands on humoral im-mune response in two rat lines selected for over 75 generations for the enhancement or elimination of aggression. Activation of presynaptic 5-HT1A receptors with a low dose of the selective 5-HT1A receptor agonist 8-OH-DPAT (0.1 mg/kg) or the blockade of postsynaptic 5-HT1A receptors with the antagonist WAY-100635 (1.0 mg/kg) did not affect the numbers of IgM-antibody forming cells (IgM-AFC) in the spleen of highly aggressive rats, which were characterized by higher immune responsiveness compared to nonaggressive line. On the other hand, the same doses of 8-OH-DPAT and WAY-100635, as well as a higher dose of 8-OH-DPAT (1.0 mg/kg), which is known to activate postsynaptic 5-HT1A receptors, produce immunostimulation in nonaggressive rats. However, only the highest dose of 8-OH-DPAT (5.0 mg/kg) was able to cause immunosuppression in nonaggressive rats that was mainly dependent on stimulation of postsynaptic 5-HT1A receptors. In contrast to nonaggressive rats, the dose of 1.0 mg/kg 8-OH-DPAT was sufficient to produce a decrease in the numbers of IgM-AFC in highly aggressive rats. Thus, pharmacological activation of pre- and postsynaptic 5-HT1A receptors, as well as the blockade of postsynaptic 5-HT1A receptors, produced different effects on the immune response in two lines of rats selected for high level of aggression or its absence. These data may have implications for more efficient treatments of a number of mental disorders associated with abnormal aggression.

慢性应激抑郁模型大鼠脑内5HT_(1A)和5-HT_(2A)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 2 4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 (1 8 78± 5 6 2fmol mgprot) ,较正常对照组 (2 6 1 2± 5 5 2fmol mgprot )明显下降(P <0 0 5 )。抑郁大鼠大脑皮层 [3H]Ketanserin特异性结合 (1 1 2 5 8± 4 2 1fmol mgprot) ,较正常对照组 (86 2 8±4 2 4fmol mgprot)明显增加 (P <0 0 5 )。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。

5-HT_(1A)受体阻断剂对乙醇引起大鼠低体温和行为性体温调节反应的影响

目的:观察5-羟色胺1A(5-HT_(1A))受体阻断剂p-MPPI对乙醇引起大鼠低体温和行为性体温调节反应的影响。方法:用无线遥控测温技术记录成年雄性SD大鼠体核温度和活动的变化。用无线遥测温度梯度仪监测大鼠体核温度和行为性体温调节活动,将大鼠置于15℃~40℃的温度梯度箱内,并允许动物自由选择箱内温度,观察乙醇(3 g/kg)引起低体温和行为性体温调节的反应以及5-HT_(1A)受体阻断剂p-MPPI(1 mg/kg)对其效应的影响。结果:(1)乙醇能引起大鼠快速的体温降低反应,同时动物选择较低的环境温度。(2)5-HT_(1A)受体阻断剂p-MPPI能明显阻断乙醇引起的低体温和行为性体温调节变化。结论:(1)乙醇能使体温调定点降低,因为乙醇引起低体温时,大鼠选择较冷环境温度区;(2)5-HT可能参与乙醇引起低体温与行为性体温调节活动。

激活或阻断内侧隔斜角带复合体中5-HT_(1A)受体对帕金森病模型大鼠认知功能的影响

目的探讨内侧隔斜角带复合体(medial septum-diagonal band of Broca complex,MS-DB)中5-HT1A受体在帕金森病(Parkinson's disease,PD)认知功能中的作用及机制。方法以6-羟基多巴胺(6-hydroxydopamine,6-OHDA)损毁单侧内侧前脑束(medial forebrain bundle,MFB)的PD模型大鼠为对象,采用行为学和电生理学方法,观察激活或阻断MS-DB中5-HT1A受体对PD认知功能和海马theta节律的影响。结果 (1)单侧MFB损毁降低了大鼠在T-迷宫实验中的选择正确率,MS-DB局部注射5-HT1A受体激动剂8-OH-DPAT进一步降低模型组大鼠在T-迷宫实验中的选择正确率,而MS-DB局部注射选择性5-HT1A受体拮抗剂WAY100635升高模型组大鼠的选择正确率;(2)单侧MFB损毁使海马theta节律的峰频率降低,MS-DB局部注射8-OH-DPAT抑制海马theta节律,降低theta节律的标准化功率,而MS-DB局部注射WAY100635诱发海马theta节律,并使theta节律的标准化功率升高。结论阻断MS-DB中的5-HT1A受体可改善模型组大鼠的工作记忆,这可能是通过兴奋海马theta节律来实现的。

直肠内脱垂患者直肠顺应性变化与肠黏膜中TRPV1、5-HT表达的关系

目的探讨直肠内脱垂(internal rectal prolapse,IRP)患者直肠顺应性改变与TRPV1、5-HT在直肠黏膜层表达的关系。方法选择临床诊断IRP的患者20例及对照组20例先进行肛管直肠测压,然后行结肠镜检查,在齿状线上方4 cm处下段直肠取黏膜活检,行TRPV1和5-HT免疫组化染色,采用图像分析法分析免疫反应阳性情况。结果与对照组比较,IRP组初始感觉容积明显增高(Z=-3.710,P<0.01),最大感觉耐受容积明显降低(Z=-5.181,P<0.01),直肠顺应性明显降低;对照组黏膜层仅有少量TRPV1表达,IRP组直肠黏膜腺体可见大量TRPV1阳性染色,与对照组相比,IRP组直肠黏膜层TRPV1的表达显著增强(Z=-5.085,P<0.01);对照组黏膜层5-HT免疫阳性染色很少,而IRP组黏膜层腺体细胞内5-HT表达量显著升高(Z=-4.734,P<0.01)。结论 IRP患者直肠顺应性明显低于对照组,与直肠黏膜层TRPV1和5-HT免疫反应阳性显著增强导致直肠高敏感有关,可能是IRP患者肛门坠胀、便意频繁等排便功能障碍的机制之一。

抑郁症、焦虑症模型大鼠情绪加工神经环路5-HT、5-HT_(1A)含量变化以及加味温胆汤的双向调节作用研究

目的基于情绪加工神经环路5-HT、5-HT_(1A)含量变化探讨抑郁、焦虑模型大鼠发病机制以及加味温胆汤的干预作用。方法将112只SPF级雄性SD大鼠(体质量180~200 g)随机分为正常对照组、抑郁模型组、焦虑模型组、抑郁中药组、焦虑中药组、抑郁西药组和焦虑西药组。分别采用慢性轻度不可预见性应激及天敌暴露应激制作大鼠抑郁及焦虑模型,其中正常对照组、抑郁模型组及焦虑模型组大鼠给予生理盐水灌胃,抑郁中药组、焦虑中药组给予12 g/kg加味温胆汤灌胃,抑郁西药组及焦虑西药组分别给予1.8 mg/kg百优解及帕罗西汀灌胃。35 d后进行行为学检测及取材,通过液质联用法、Western-blot法检测各组大鼠前额皮质、杏仁核、海马及下丘脑组织中5-HT含量变化、5-HT_(1A)蛋白表达水平。结果行为学数据显示,抑郁模型组大鼠水平运动次数、垂直运动次数以及总路程比正常对照组显著减少(P<0.05),加味温胆汤能显著改善模型大鼠抑郁行为表现(P<0.05),抗抑郁西药百优解只对总路程有显著影响(P<0.05);焦虑模型大鼠水平运动次数、垂直运动次数以及总路程比正常对照组显著增加(P<0.05),加味温胆汤能改善垂直运动次数和水平运动次数(P<0.05),对总路程无显著影响,抗焦虑西药帕罗西汀能改善垂直运动次数,对其他无显著影响(P<0.05)。抑郁模型组海马、前额皮质5-HT含量降低、海马5-HT_(1A)蛋白表达水平升高(P<0.01,P<0.05),加味温胆汤能提高抑郁模型组海马和前额皮质5-HT含量、降低海马5-HT_(1A)蛋白表达水平(P<0.05);焦虑模型组前额皮质和海马5-HT含量升高、前额皮质5-HT_(1A)蛋白表达水平显著降低(P<0.05),抗焦虑西药帕罗西汀能提高前额皮质5-HT_(1A)蛋白表达水平(P<0.05),加味温胆汤能降低前额皮质和海马5-HT含量,但不能影响前额皮质和海马5-HT_(1A)蛋白表达水平。结论本项目研究发现,抑郁、焦虑模型大鼠情绪加工神经环路5-HT含量、5-HT_(1A)蛋白表达并不一致,加味温胆汤干预作用也有差异。(1)加味温胆汤能够改善抑郁、焦虑行为学表现。(2)加味温胆汤抗抑郁作用可能优于抗焦虑作用。(3)海马、前额皮质可能是抑郁症、焦虑症发病共同脑区。(4)抑郁、焦虑模型组大鼠海马和前额皮质5-HT含量与5-HT_(1A)蛋白表达负相关。

三种针法对对氯苯丙氨酸诱导失眠大鼠海马5-HT_(1A)、5-HT_(2A)基因表达影响研究

目的:观察针刺失眠方、脐内环穴,失眠方和脐内环穴联合应用对对氯苯丙氨酸(para-chlorophenylalanine,PCPA)失眠大鼠海马5-HT_(1A)、5-HT_(2A)总RNA表达的影响,并对三种针法的效果进行比较研究。方法:随机抽取6只正常大鼠作为正常组,将30只PCPA失眠大鼠随机分为模型组、针刺失眠方组、脐内环针组、失眠方加脐内环针组、非穴组5组,每组6只。正常组、模型组无特殊处理,干预组分别给予针刺失眠方、针刺脐内环穴、针刺失眠方和脐内环穴联合干预,非穴组予针刺非穴处理,治疗6 d后取大鼠海马组织,采用real-time PCR方法检测5-HT_(1A)、5-HT_(2A)的基因表达。结果:PCPA失眠大鼠海马5-HT_(1A)基因表达下降,而5-HT_(2A)基因表达上调;三种针法均显著上调PCPA失眠大鼠海马5-HT_(1A)的基因表达、下调5-HT_(2A)的基因表达;而失眠方和脐内环穴联合应用的效果优于失眠方或者脐内环穴单用。结论:PCPA失眠大鼠可能存在中枢5-HT受体信号机制异常,三种针法可能通过调节海马内5-HT_(1A)、5-HT_(2A)基因表达而改善失眠;实验支持失眠方和脐内环穴针刺联合应用为失眠症的优选干预方法。

人淋巴组织中5-HT_(1A)受体的表达

目的 检测 5 HT1A受体蛋白及其mRNA在人淋巴组织中的表达情况 ,寻求神经免疫内分泌网络间功能双向调节的形态学依据。方法 应用免疫组织化学Picture法及核酸分子原位杂交的方法 ,检测 5 HT1A受体蛋白及其mRNA在 10 0例人淋巴结、脾脏及肠道淋巴组织中的表达。结果 免疫表型显示 5 HT1A受体蛋白在人各种淋巴组织中表达的阳性率为 86 2 5 % ,与原位杂交 (阳性率为 75 0 % )之间的差异无统计学意义 (χ2 =0 5 70 ,P >0 0 5 )。结论 人的淋巴组织不但可以表达 5 HT1A受体蛋白还可以合成其mRNA ,5 HT1A受体为神经免疫内分泌网络共有的生物学语言媒介 ;神经源性与免疫源性的 5 HT都可以通过免疫细胞膜上的 5

3种针法对PCPA诱导的失眠大鼠海马5-HT_(1A)、5-HT_(2A)蛋白表达的影响

目的观察针刺失眠方、脐内环穴及失眠方加脐内环穴对对氯苯丙氨酸(PCPA)失眠大鼠海马5-HT_(1A)、5-HT_(2A)蛋白表达的影响。方法将造模成功的30只PCPA失眠大鼠随机分为5组(每组6只):模型组、针刺失眠方组、针刺脐内环穴组、针刺失眠方加脐内环穴组、针刺非穴组;另设正常组(6只)。治疗6d后取大鼠海马匀浆,采用免疫印迹法检测5-HT_(1A)、5-HT_(2A)蛋白含量。结果 PCPA模型大鼠海马5-HT_(1A)蛋白表达下降,而5-HT_(2A)蛋白表达上调;3种针法均显著上调PCPA失眠大鼠海马5-HT_(1A)蛋白表达、下调5-HT_(2A)蛋白表达;而失眠方加脐内环穴针刺作用更明显,优于单一针刺方法。结论 PCPA失眠大鼠存在中枢5-HT受体信号机制异常,3种针法可能通过调节海马内5-HT_(1A)、5-HT_(2A)蛋白表达而改善失眠;实验支持失眠方加脐内环穴针刺为失眠症的优选干预方法。

消痰解郁方对慢性强迫游泳应激后小鼠行为学及其海马组织5-HT_(1A)受体mRNA表达的影响

目的:观察消痰解郁方对慢性强迫游泳应激后小鼠行为学及其海马组织5-HT1A受体mRNA表达的影响,探讨其可能的抗抑郁效果及机制。方法:40只昆明种小鼠随机分为消痰解郁组、氟西汀组、生理盐水对照组和正常组(n=10),前3组小鼠连续7 d行强迫游泳应激后分别给予消痰解郁方(3.92 g/ml0、.4 ml/d)、氟西汀(0.13 mg/ml0、.4 ml/d)和生理盐水(0.4ml/d),正常组小鼠正常饲养。观察前3组小鼠7 d内强迫游泳不动时间的变化;应激结束取所有小鼠海马组织,RT-PCR半定量法比较各组小鼠5-HT1A受体mRNA的表达。结果:与正常组相比,慢性强迫游泳应激后小鼠海马区5-HT1A受体的mR-NA表达明显下降(P<0.05);与生理盐水对照组相比,消痰解郁方和氟西汀均能明显缩短小鼠的强迫游泳不动时间,提高小鼠海马区5-HT1A受体mRNA的表达,且消痰解郁组优于氟西汀组(P均<0.05)。结论:消痰解郁方可能通过上调慢性强迫游泳应激后小鼠海马区5-HT1A受体mRNA的表达,缩短小鼠强迫游泳不动时间,这可能是其发挥抗抑郁作用的机制之一。