THE ROLE OF RED NUCLEUS IN THE MODULATION OF SPINAL NOCICEPTIVE TRANSMISSION AND IN NOCICEPTION ELICITED BY MUSCLE SPINDLE AFFERENTS

RNiswellknownasanimportantnucleusinmotorcontrolofextra pyramidalsystem .However ,anatomicalstudieshaverevealedthatasignificantproportionoftherubrospinalfibersterminatesintheventralportionofthedorsalhorn (laminaeⅤ Ⅵ ) ,andinpartoftheintermediatehorn (laminaeⅦ ) .Suchterminaldistributionsuggestthatrubro spinalneuronsmaymodulatetheresponsesofdorsalhornneuronsinvolvedintherelayofsomatosensorycutaneousinformationtomorerostrallevelsofner voussystem .ThereareevidencesthatRNstimula tionaffectsnoc…     

THE ROLE OF MUSCLE SPINDLE IN MUSCLE ATROPHY INDUCED BY SIMULATED MICROGRAVITY

Musclesizeisdeterminedbythebalancebe tweentheratesofproteinsynthesisanddegradation .Acceleratedproteindegradationisanimportantfac torcontributingtothelossofmuscleweightinvari ousphysiologicalandpathologicalconditions .Antigravityslow twitchmusclessuchastheso leusarepreferentiallyatrophiedduringmicrogravityexperiments.Studiesbothinvivoandinvitrohaveprovidedstrongevidencethatincreased proteinbreakdownismainlyresponsibleforthesoleusmus clewastingofnon weighting bearinganimals[1] ,al thoughthereis…     

THE ROLE OF NUCLEUS RAPHE MAGNUS IN THE ANTINOCICEPTIVE EFFECT OF MUSCLE SPINDLE AFFERENTS IN THE RAT

Previous studies revealed that stretching thehindlimb muscles of rats of systemically adminis-trating succinylcholine(SCH) for activation of theafferents of muscle spindle receptors markedly de-pressed the responses of neurons in the spinal dor-sal horn to noxious stimulation[1,2 ] ,and thisantinociception was reduced significantly by tran-section of the spinal cord[2 ] ,suggesting that thesupraspinal structures might be involved in theantinociception elicited by activation of the musclespindl…     

体外循环期间血浆与红细胞内钾的改变及补钾方法探索

作者观察了30例心内直视手术患者于体外循环前、中、后血浆钾及红细胞内钾的变化及其影响因素,并分析钾的补充量,发现:灌注前、中的低血钾倾向主要是由于钾向红细胞内转移,而在灌注后主要是尿钾排泄所致;钾的内转移主要受低温、灌注时间及血pH的影响;转流中血钾在4.0m mol/L以下时可导致细胞内钾丢失,提出灌注中补钾量应至少>1.56m mol/kg才能维持血钾在4.0 m mol/L以上。     

牙周炎患者红细胞免疫功能及发病机理研究

采用酵母菌花环试验对31例牙周炎患者红细胞免疫粘附功能、循环免疫复合物、补体C_3含量进行了检测,并与正常组进行了比较。结果显示:牙周炎患者红细胞膜免疫复合物及循环免疫复合物均升高,补体C_3含量降低,且皆与正常组有显著性差异。作者认为:免疫复合物在牙周炎发病机理中有一定的意义,牙周炎患者红细胞免疫对清除循环免疫复合物起着重要作用。     

庆大霉素中毒豚鼠蜗核SP免疫反应阳性神经元的变化

用免疫组化方法探讨庆大霉素耳中毒时蜗核ＳＰ免疫反应神经元的胞体截面积及细胞数的变化。结果发现庆大霉素１００ｍ ｇ·ｋｇ－ １·ｄ－ １腹腔注射后１ｄ,豚鼠蜗核ＳＰ样神经元胞体截面积立即发生了变化,并持续到连续注药第２１ 天;ＳＰ样神经元细胞数量的相对变化发生在注药３ｄ 以后。结果提示：①庆大霉素中毒豚鼠蜗核神经元的变化和耳蜗的病变可能同时发生或蜗核早于耳蜗病变。②临床上治疗氨基甙类抗生素所致耳聋应兼治中枢病变并尽早实施     

大鼠下丘脑室旁核大细胞自发电活动及对去甲肾上腺素反应的增龄性变化

应用神经垂体逆向电刺激,于下丘脑室旁核内用玻璃微电极细胞外记录的方法寻找室旁核神经内分泌大细胞,并观察了３ 月龄、１２ 月龄及２６ 月龄三组大鼠室旁核大细胞的自发放电及对脑室注射去甲肾上腺素（Ｎｏｒｅｐｉｎｅｐｈｒｉｎｅ ,ＮＥ）反应的增龄性变化。结果发现,不同月龄组室旁核大细胞中呈慢不规则、快连续及位相型放电的神经元的比例相似;随增龄室旁核大细胞的自发放电频率增加;室旁核中加压素与催产素神经元对脑室注射ＮＥ的反应发生增龄性变化。这些结果提示：下丘脑室旁核大细胞电生理特性发生增龄性变化,并可能因此导致其分泌功能的变化     

体外循环前后T细胞亚群及红细胞免疫功能的改变

本文报告了２３例体外循环（ＣＰＢ）心脏直视手术病人及１１例非ＣＰＢ病人的外周血Ｔ细胞亚群、红细胞免疫粘附功能（ＲＣＩＡ）、红细胞内超氧化物歧化酶（ｒＳＯＤ）及血浆循环免疫复合物（ＣＩＣ）水平等在手术前后的变化。结果提示：心胸手术后Ｔ细胞及红细胞的免疫功能受到了抑制，且ＣＰＢ组的免疫抑制程度比非ＣＰＢ组严重。重点讨论了ＣＰＢ对Ｔ细胞及红细胞免疫功能的影响因素。     

DL-四氢巴马汀和青藤碱对兔输卵管平滑肌活动的影响

作者观察了两种中药钙拮抗剂DL—四氢巴马汀和青藤碱对兔输卵管平滑肌活动及对卵子运行的影响。结果表明:两药均可明显抑制兔离体输卵管峡部肌收缩活动,使其频率、振幅、张力均降低,收缩活动曲线面积明显减少,并能抑制去甲肾上腺素诱导的收缩效应。在iv HCG 48 h后,具有延缓兔输卵管内卵子运行的作用。结果提示,抑制平滑肌活动可能是这两种药物延缓卵运行的主要原因之     

低硒大鼠骨骼肌琥珀酸脱氢酶活性的组织化学观察

本文用分别补充VE(100ppm)的低硒(0.011ppm)和加硒(0.084ppm)饲料饲养并繁殖大鼠。血硒测定表明,母代和子代的低硒组均明显地低于母代和子代的加硒组(p<0.01);新生子代低硒鼠的骨骼肌硒含量亦显著地低于新生子代加硒鼠。但是,组织学上未检见实验大鼠骨骼肌的病变。组织化学上,新生子代鼠的骨骼肌纤维对Nitro BT染色不呈现A、Ⅰ和An型骨骼肌纤维的分型。母代和子代低硒大鼠骨骼肌的A型和Ⅰ型肌纤维的数量及A/A+Ⅰ比值同母代和子代的加硒组相比无明显差异(p>0.05)。结果表明.在补充VE的低硒情况下,大鼠骨骼肌琥珀酸脱氢酶的活性不受硒缺乏的影响。     

原发性肾病综合征患儿T细胞亚群及其抑制性细胞活性

本文检测了37例原发性肾病综合征患儿的外周血T淋巴细胞亚群和刀豆素A诱导的抑制细胞活性水平。结果显示,肾病患儿初发时就存在抑制性T细胞数量及功能的减低,并随着激素治疗及病情的好转而恢复正常,提示本病的免疫调节失衡可能是一原发性改变,在肾病发病机理中起一定的作用。     

大鼠心肌梗塞后心肌肥大早期心肌肌球蛋白ATP酶活性及同功酶的变化

为探讨心肌梗塞(MI)后心肌肥大早期肌球蛋白ATP酶活性和同功酶的变化及其意义,本文用大鼠MI模型,于术后第9天和第21天分别测定了非梗塞心肌肌球蛋白ATP酶活性、同功酶分布及心肌细胞直径。结果表明,MI后第9天,在心肌细胞直径增大的同时,肌球蛋白ATP酶活性下降,同功酶V_1含量下降。至MI后第21天,上述这种变化更加明显。结果提示:MI早期随着非梗塞心肌肥大的建立,肌球蛋白ATP酶活性及其同功酶分布也发生了适应性的改变。     

慢性肝病患者血硒、GSH－Px和LPO的动态变化及补硒的影响

动态观察１６例慢性肝病患者加服硒酵母（２００μｇ硒／ｄ，连用１２周）后血浆硒水平、谷胱甘肽过氧化物酶（ＧＳＨ－Ｐｘ）活性和脂质过氧化物（ＬＰＯ）含量的变化，并与未服硒制剂１６例（对照组）作比较。结果：①实验开始１２周后，对照组患者血浆硒、ＧＳＨ－Ｐｘ活性才明显增高，ＰＯ含量明显下降，与治疗前比较差异有显著性（Ｐ＜０．０５）；②服硒组患者４周后血硒、８周后ＧＳＨ－Ｐｘ活性即显著增高，１２周趋于稳定，接近正常人水平。且血硒水平均显著高于对照组同期值（Ｐ＜０．０５）；③服硒组患者８周后血ＬＰＯ含量亦显著下降。提示利用硒酵母口服提高慢性肝病患者的抗氧化能力是可行的。     

硒对克山病区粮饲养大鼠心肌细胞的影响——超微结构及膜通透性的改变

本实验用克山病区低硒粮饲养大鼠,造成动物低硒状态,同时增设补硒组和常备饲料组大鼠作为对照,饲养2个月后,应用示踪剂分别观察其心肌细胞超微结构及膜通透性。结果低硒组大鼠部分心肌细胞膜不完整,镧颗粒进入到细胞内。钌红使质膜染色呈中等电子密度的不均匀窄带,并经质膜破损处进入心肌细胞内。补硒组大鼠变化轻微。提示克山病区粮可引起大鼠早期心肌细胞超微结构及膜通透性的改变,补硒可使之缓解或改善。     

心肌炎患儿红细胞免疫功能及T细胞亚群与自由基的关系

本文报道了７２例３岁～１２岁心肌炎患儿红细胞免疫粘附功能，Ｔ细胞亚群，红细胞超氧化物歧化酶（ＳＯＤ），血清过氧化脂质（ＬＰＯ）。发现心肌炎患儿红细胞免疫粘附功能低下，同时伴随着ＯＫＴ８和ＳＯＤ的降低。红细胞免疫粘附功能与ＯＫＴ８和ＳＯＤ呈正相关，与ＬＰＯ呈负相关。经治疗后显示：胸腺肽和大剂量维生素Ｃ可改善心肌炎患儿红细胞、Ｔ细胞免疫功能失衡，降低脂质过氧化反应。     

THE EXPERIMENTAL STUDY ON THE CELL APOPTOSIS AND EXPRESSION OF BCL-2 PROTEIN IN INTRACEREBRAL HEMORRHAGE IN MODEL OF RATS

Intra-cerebral hemorrhage is a common clinicaldisease,with a high mortality and morbidity.So itis one of the clinical hot topics.It has been foundinrecent years that there is a close relationship bet weenthe cell apoptosis and the course or prognosis of in-tra-cerebral hemorrhage.Bcl-2,as the apoptosis-adjusted gene,plays ani mportant role in the courseof cell apoptosis,but the mechanis min the cell ap-optosis in intra-cerebral hemorrhage remains un-clear.In this experi ment,with the model bui…     

原发性高血压病血栓素A2-前列环素平衡及血小板功能改变的探讨

本文对63例正常人,126例原发性高血压(EH)患者的血浆TXB2、6-酮-PGF_(1a)及血小板聚集率进行了测定,并对单纯性高血压及合并心脏损害或缺血性脑血管病患者作了分析。结果表明,EH血浆TXB2水平较正常组明显升高。6-酮-PGF_(1a)水平则低于正常组,血小板聚集性较正常组高。单纯高血压组TXB2、血小板聚集率均低于有合并症组。提示EH存在TXA2-PGI2失衡及血小板功能亢进,其可能参与高血压的发生、发展,并为高血压合并心脏损害及缺血性脑血管症的病理基础之一。     

SUPPRESSION OF ANGⅡ AFTER ACUTE SALINE LOAD ASSOCIATED WITH THE CHANGES OF PLASMA ANP AND SODIUM METABOLISM IN SALT-SENSITIVE HYPERTENSION PATIENTS

Saltsensitivityisanintermediategenotypeofessentialhypertension ,associatedwithnumerousneuro hormonalabnormalities[1,12 ] .Theregulationdysfunctionofrenin angiotensinsystemisinvolvedinsaltsensitivity ,whichconsistsoftwodifferentregulatoryresponses ,modulatorsandnon modula tors,aftersaltload[2 ,13 ] .Basedonour previousstudies ,theobjectofthisstudyistoinvestigatethechangepatternofrenin angiotensinandatrialnatri ureticpeptide(ANP)ofsaltsensitivehypertensionthroughobservingthechangesinplasmaangio…     

THE EXPRESSION OF BCL-2, BAX AND CASPASE-3 IN NEURON OF THE SPINAL CORD ANTERIOR HORN AFTER CAUDA EQUINA ACUTE COMPRESSION

Objective To explore the influence of the acute cauda equina compression on the iumbosacral spinal cord; To clarify the pathologic change of the motor neuron after acute cauda equina compression. Methods 27 canis familiaris were randomly divided into 9 groups （3 in each） ： one for normal group, one for control group, and seven for compression groups. The control group and compressed groups was given operation and the sac made of silica gel was placed under the lamina of L5-6. Water was injected into the sac until their posterior legs paralysis in compressed groups, the animals had been compressed for 4, 8, 12, 24, 48, 72, 168 hours. The control group were not injected water. Cells apoptosis was investigated with the technology of TdT-mediated biotin dUTP nick end-labeling （TUNEL） staining. The Bcl-2 Bax and Caspase-3 protein was investigated by immunohistochemical method. Results TUNEL staining cells in anterior horn presented after compressed 8-12 hours, and at 72 hours the number of positive cells got to maximum, it decreased subsequently after 168 hours. The protein of Bax, Bcl-2 expressed a little in normal motor neuron. The caspase-3 protein didn＇t express in normal ceil. They all reached the peak at 72 hours after compression. Conclusion The apoptosis of motor neuron occurred earlier after eauda equina acute compression. Bax protein restrained Bcl-2 protein then active caspase-3 and conduced apoptosis of motor neuron.