白纹伊蚊溴氰菊酯抗性株4龄幼虫cDNA文库的构建

目的 :构建白纹伊蚊溴氰菊酯抗性株 4龄幼虫cDNA文库。方法 :抽提、纯化白纹伊蚊溴氰菊酯抗性株 4龄幼虫总RNA ,进行反转录合成第 1链cDNA ;用Clontech公司SMARTTM cDNA文库构建试剂盒进行长距离PCR ,合成全长双链cDNA ;PCR产物经蛋白酶K消化、提纯后 ,进行SfiI酶切 ;用ChromaSpin 40 0柱将酶切产物进行分级分离 ,然后经 1 1%琼脂糖凝胶电泳鉴定 ,回收 40 0bp以上的组分 ,并与λTriplEx2载体连接 ;连接产物经体外蛋白包装 ,产生未扩增文库 ;检测未扩增文库滴度和重组效率后 ,进行文库的扩增 ,并测定扩增文库的滴度 ;随机挑取 9个噬菌体 ,用载体克隆位点两端的引物进行PCR扩增 ,以检测所构建的cDNA文库的质量。结果 :经检测 ,未扩增文库滴度达 2 0× 10 7pfu mL ,重组效率在 10 -4 稀释度时每块平板约 2 10～ 2 5 5个噬菌斑中均未发现任何蓝色噬斑 ,扩增文库滴度达 1 75× 10 9pfu mL ;用载体克隆位点两端的引物进行PCR鉴定 ,结果显示 :所选 9个噬菌体中均含有重组的cDNA ,并且均在 5 0 0bp以上 ,其中 1kb以上的有 2个、 70 0bp的有 5个、 5 0 0bp的有 2个。结论 :已成功地获得一高质量的白纹伊蚊溴氰菊酯抗性株 4龄幼虫cDNA文库。     

金仓鼠神经管cDNA文库的建立

目的　构建金仓鼠神经管cDNA文库,以筛选与神经管发育及神经管畸形发生相关的基因。　方法 　用TRIZOLReagent提取金仓鼠神经管总RNA;用LD PCR法反转录合成双链cDNA;经蛋白酶K消化、SfiⅠ酶切、 CHROMASPIN 400柱分离去除小于500bp的片段;将cDNA与载体λTriplEX2按一定比例连接;经体外包装,建立 cDNA的噬菌体表达文库。　结果　cDNA文库容量为1.5×106pfu ml,重组率为99%,平均插入片段大于1kb。　 结论　我们初步构建的金仓鼠神经管cDNA文库为高效的cDNA文库。     

类风湿关节炎滑膜组织T7噬菌体展示cDNA文库的构建

目的构建类风湿关节炎(RA)滑膜组织T7噬菌体展示cDNA文库,为筛选和鉴定RA特异性基因的研究奠定基础。方法取确诊RA患者的滑膜组织,用Trizol试剂提取总RNA,Oligotex离心柱分离mRNA,电泳检测其质量,逆转录合成双链cDNA,经末端修平、接头连接、酶切后去除过多接头,收集>300bp的cDNA片段,与T7Select10-3载体连接,体外包装并扩增得到类风湿关节炎滑膜组织T7噬菌体展示cDNA文库。最后,通过铺平板滴度测定及PCR技术鉴定文库质量。结果所构建原始文库重组克隆数为2×107pfu,扩增滴度8.9×1010pfu/ml。PCR法检测片段插入率为90%,插入片段在300～2000bp之间。文库噬菌体裂解液PCR扩增得到BiP基因片段。结论成功构建了高质量的RA滑膜T7噬菌体展示cDNA文库,为下一步RA自身抗原的筛选奠定了基础。     

藏羚羊大脑皮质cDNA文库的构建

目的:构建藏羚羊大脑皮质组织的cDNA文库并鉴定文库质量。方法:提取藏羚羊大脑皮质组织总RNA,经oli-gotex试剂盒纯化得到mRNA。利用SMART技术,使用含有SfiIB酶切位点的oligo(dT)引物和含有SfiIA酶切位点的SMARTIV寡核苷酸在PowerScript逆转录酶作用下运用mRNA5′末端的模板转换方法合成cDNA第1链。利用LDPCR扩增cDNA,经SfiI(ⅠA和ⅠB)酶切后,通过CHROMASPIN-400柱进行分级分离去除<500bp的片段,再同经SfiI酶切的λTripIEx2载体连接,体外包装后转染到大肠杆菌XL1-Blue宿主菌中,进行文库滴度和重组率的测定,然后扩增文库并随机挑取10个噬菌斑行PCR反应鉴定插入片段大小。结果:构建的cDNA文库滴度为1.8×109pfu/L,重组率>98%,文库扩增后滴度达8×1012pfu/L,插入片段长度在750～6000bp之间,平均长度为4250bp。结论:文库具有良好的质量,为进一步筛选、克隆藏羚羊大脑皮质组织特异表达基因奠定了基础。     

RPL30基因的克隆及其与神经管发育相关关系的研究

本文通过构建金黄地鼠神经管cDNA文库,筛选了RPL30基因,并探讨了其与神经管发育的关系。提取胚胎(E)8.5d的金黄地鼠神经管总RNA,用SMART技术构建神经管cDNA的噬菌体表达文库。利用分部分排除技术(SSS法),结合PCR法逐级筛选cDNA文库。将得到的RPL30阳性噬菌斑进行质粒转化、酶切鉴定及测序分析,进而回收、纯化RPL30cDNA片段并制备探针。用Northern杂交技术检测神经管发育过程中RPL30mRNA的表达状况。结果显示,构建的神经管cDNA文库容量为1.5×106pfu/ml,重组率达到99%,平均插入片段长度大于1kb。经过筛选得到含RPL30cDNA的阳性克隆。序列测定及同源性分析发现,该cDNA片段全长535bp,其中含有完整的开放阅读框。Northern杂交结果显示,在E8d~E12d各时间段,神经管中RPL30mRNA的表达均处于较高水平,且随着时间的增长,表达量递增,于E12d达到高峰。本文结果表明,我们用SSS技术结合PCR法从神经管cDNA文库中克隆到了RPL30基因的全长cDNA序列,该基因可能与神经管发育密切相关。     

应用抑制性消减杂交技术筛选及鉴定高温致金黄地鼠神经管畸形下调表达基因

目的克隆高温致金黄地鼠神经管畸形下调表达基因，探讨其分子生物学机理。方法应用抑制性消减杂交技术构建高温致畸金黄地鼠胚胎神经管反向消减cDNA文库；联合蓝白斑和菌落PCR方法筛选阳性克隆进行测序和同源性分析；用Northern印迹方法证实这些基因的表达。结果成功构建高温致畸金黄地鼠胚胎神经管反向消减cDNA文库，从中筛选到15个基因，均与GenBank中已知基因有同源性。Northern印迹证实这些基因在高温致畸胚胎神经管中均呈下调表达。结论发现了高温致金黄地鼠神经管畸形过程中的一些重要相关基因并对其功能进行了初步探讨。     

白纹伊蚊T7噬茵体展示cDNA文库的构建

为筛选白纹伊蚊与相关蚊媒病毒相互作用的基因,本文构建了白纹伊蚊Aedes albopictusT7噬菌体展示eDNA文库,分离与纯化白纹伊蚊mRNA,所得mRNA经反转录合成双链cDNA后,在双链cDNA末端加上定向EcoRI／HindIn接头使其两端分别带EcoRI和Hind11I黏性末端;接着用MiniColumn纯化收集300bp以上的双链cDNA片段连接于T7 Select 10—3b载体;经体外包装后,以BLT5403为受体菌构建1v7噬菌体展示cDNA文库。所建文库的库容量经测定为1．7×10’pfu／mL,扩增后文库滴度为2．5×10^（15）pfu／mL。对从原始文库中随机挑取的50个噬菌斑进行PCR鉴定,重组率为95％以上;阳性克隆片段长度分布在200～2000bp,其中有90％的插入片段大于300bp。本文所构建的白纹伊蚊T7噬菌体展示cDNA文库,满足cDNA文库的基本要求,可以用于筛选白纹伊蚊与相关蚊病毒相互作用的基因。     

鸡B淋巴细胞cDNA T7噬菌体表达文库的构建与鉴定

目的:构建鸡B淋巴细胞cDNAT7噬菌体表达文库并对文库质量进行鉴定。方法:利用oligo(dT)-纤维素亲和层析从SPF雏鸡法氏囊细胞制备mRNA,合成的双链cDNA定向克隆到T7EcoR I/HindIII载体臂,包装并构建cDNA表达文库。对文库进行滴度测定和重组子测定。扩增文库并进行PCR鉴定插入序列的长度及分布。结果:文库初始滴度为5×107pfu/mL,扩增后滴度达到1.88×1010pfu/mL。插入片段平均长度1440bp,主要分布在750～2000bp之间。结论:构建的鸡B淋巴细胞cDNAT7噬菌体表达文库具有很高的质量,为进一步研究鸡B细胞发育以及传染性法氏囊病毒(IBDV)的分子致病机制奠定了实验基础。     

高温致金黄地鼠神经管畸形的上调表达基因筛选及其鉴定

目的:筛选高温致金黄地鼠神经管畸形的上调表达基因,探讨其分子生物学机制。方法:通过抑制性消减杂交技术获得消减产物,转化大肠杆菌DH5α,构建高温致金黄地鼠胚胎神经管畸形的消减cDNA文库;联合蓝白斑和菌落PCR方法筛选含插入片段的阳性克隆,进行测序和同源性分析,并经Northern杂交技术检测基因的表达。结果:成功构建高温致金黄地鼠胚胎神经管畸形的消减cDNA文库,其中2个克隆插入片段的基因序列与小鼠磷酸甘油酸酯激酶(Pgk-1)同源。Northern杂交证实该基因在高温致畸胚胎神经管的表达较其在同龄正常胚胎神经管明显升高。结论:Pgk-1的上调表达可能与高温致神经管畸形密切相关。     

Level of functioning of siblings and parents of probands of varying degrees of retardation

A further analysis of already published data supports the position that retardates of low ability level less frequently have retarded siblings, retarded parents, and parents low in occupational level than do retardates higher in ability level. The analysis supports the position that there are two types of retarded individuals, persons retarded as a result of gene or chromosomal anomalies, brain injury, etc., who more frequently occur in the lower-level retardate group, and persons whose retardation represents polygenic segregation, who more frequently occur in the higher-level group.     

局部注射辛伐他汀对骨质疏松大鼠股骨髁骨小梁的改建效应

背景：局部注射具有成骨作用的辛伐他汀,可显著增加骨质疏松大鼠股骨颈及股骨髁部的骨密度及力学强度,分析局部注射辛伐他汀对股骨髁骨小梁的影响。 目的：进一步研究骨质疏松大鼠股骨内局部注射辛伐他汀对股骨髁骨小梁的影响。为将辛伐他汀应用于临床骨质疏松局部治疗提供实验基础。 方法：18只雌性SD大鼠双侧卵巢切除后3个月,制备大鼠骨质疏松模型。实验大鼠随机数字表法均分为3组,分别在实验大鼠的右侧股骨髓腔内单次注射辛伐他汀溶液5 mg、10 mg,对照组单纯注射空白载体。分别在注射后1个月处死大鼠并取材。Micro-CT扫描并定量分析骨组织形态变化。 结果与结论：给药后1个月,Micro-CT扫描结果显示,辛伐他汀治疗组的骨微结构参数如骨皮质厚度、骨小梁密度及连接率明显优于对照组。说明疏松骨骼单次注射小剂量辛伐他汀可显著促进股骨髁部骨小梁改建,改善骨骼微结构,可为强化局部、防治骨质疏松骨折的新选择进一步提供实验基础。     

石斛属民族药用植物的分类及生药学研究

中药石斛早在《神农本草经》中就被列为上品,其应用历史悠久,具有养阴生津、补肾益气、润喉护嗓、活血明目、抗癌防老等功效。本文对国内外石斛属民族药用植物的分类及生药学研究进行了综述。     

膝关节骨性关节炎的关节镜治疗体会

目的我科自2001～2005年4月对59例67膝的骨性关节炎（0A），进行关节镜检查及镜下清理术。方法镜检：膝关节骨性关节炎伴不同程度滑膜炎，滑膜皱壁粘连纤维片，关节软骨不同程度破坏。镜下清除增生滑膜，松解粘连，去除剥脱软骨、修复关节面。结果随访2月～4年，平均1.5年，术后综合评估2月～1年，优良率94％；1～2年，优良率79.2％；2年以上优良率54.8％。结论关节镜对膝关节骨性关节炎诊断能提供了比较全面的资料，并对骨性关节炎早期有良好疗效，具有创伤小、恢复快、并发症少和重复治疗等优点。     

Anatomical study of distribution of valves of the cutaneous veins of adult''s limbs

Since the cutaneous veins of the four limbs have been used as autogenous grafts in the treatment of cardiovascular disorders, knowledge of distribution of the valves is increasingly required depending upon the use. In the gross anatomical study of distribution of valves of the trunci venae, there has been argument about locational relationships between the venous roots and the valves in the vicinity of the roots and the inter-valvular distance. However, there have been only few reports discussing detailed information about valves of the cutaneous veins of the four limbs. The authors observed patterns of distribution of the cutaneous venous valves of the four limbs of cadavers prepared for practice in anatomy. The following parts were excised from each cadaver: the cephalic, basilic, and the great saphenous veins, which originate from the acral venous network and flow into the proximal deep veins, and the venous roots communicating with these veins. An incision was made on each excised vein in the direction of the long axis under observation with a stereoscopic microscope, and the inter-valvular distance and the distance between the valve and the orifice of venous root in the vicinity of the valve were measured. The inter-valvular distance varied with type of the truncus venae, and it varied according to area even in the same truncus venae.     

Pathways of the realization of immunomodulating effects of neurotransmitters

Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 115, N ^o 4, pp. 401–404, April, 1993     

Characterization of sterols of three digenetic trematodes of buffalo

Sterols of three digenetic trematodes were isolated and characterized by infrared and 1H nuclear magnetic resonance spectroscopies, and gas-liquid chromatography and gas chromatography-mass spectrometry. Sterols identified were cholesterol, cholestanol, 24-methylcholesterol, 24-methylcholestanol, 24-ethyl-22-dehydrocholesterol, 24-ethyl-22-dehydrocholestanol, 24-ethylcholesterol and 24-ethylcholestanol.     

Mechanisms of generation of slow components of bioelectric activity in diagnostics of functional state of the gastrointestinal tract

New electrophysiologic devices were used for the diagnostics of the state of excitable structures in the gastrointestinal tract and correction of their motor functions. Bioelectrical and biomechanical activities form the basis of functioning of internal organs. The mechanisms of generation of slow bioelectrical activity that are important for clinical and physiological studies are described. One of these mechanisms is a capacitance parametric transducer converting the energy of contractions into specific electric signals reflecting muscle functions. Another mechanism results from slow oscillations of resting potentials of interrelated excitable cells in large neuromuscular structures of internal organs. The elaborated procedure is efficient for preventing early postoperative paresis of the gastrointestinal tract. Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 128, No. 10, pp. 448–452, October, 1999     

胃小弯侧血管弓的MDCT解剖

目的：研究正常胃小弯侧血管弓及其属支血管的多排螺旋CT表现。方法：回顾性分析51例正常成人的上腹部CT资料,观察胃小弯侧血管弓及其属支血管的显示情况、血管弓形态及其与胃壁的关系。结果：51例均显示胃小弯侧血管弓,血管弓贲门部属支、胃体部属支和幽门部属支分别显示46例、15例和10例;血管弓与胃壁紧邻41例。结论：MDCT检查可良好显示正常胃小弯侧血管弓及其属支血管。     

Assessment of the efficacy of treatment of hemangiomas

Assessment of the aftereffects of cryoexposure and ultrahigh-frequency cryoexposure on hemangioma tissue of various types, cavernous and squamous, showed a higher cryogenic effect in hemangiomatous tissue preexposed to ultrahigh-frequency waves. A quantitative criterion is proposed for assessing the efficacy of the studied methods of exposure. Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 119, N ^o 6, pp. 669–672, June, 1995