去唾液酸糖蛋白受体与慢性肝病自身免疫

去唾液酸糖蛋白受体 (AsialoglycoproteinReceptor,ASGPR)是肝细胞的一种重要且高效的内吞受体 ,主要分布于肝小叶门静脉周围肝细胞的窦面膜上 ,又名肝凝集素 (liverlectin)。近年来研究发现该受体除了在肝脏基因定向转移、靶向药物治疗当中具有较高的应用价值之外 ,还相继在自身免疫性肝炎(AIH)、原发性胆汁性肝硬化 (PBC)、病毒性肝炎等慢性肝病患者血清中检测到其相应的自身抗体 ,从这些患者外周血、肝活检组织分离到ASGPR特异性的T淋巴细胞。由于ASGPR的肝脏特异性与其在肝脏的特殊分布位置和某些慢性肝病的组织病理学特征极…     

肝脏去唾液酸糖蛋白受体特异性RNA适配子的SELEX筛选与鉴定

目的 获得能够特异性高亲和力结合肝脏特异性去唾液酸糖蛋白受体(asialoglycoprotein receptor, ASGPR)的RNA适配子,为开发诊断和治疗肝脏疾病的靶向性试剂和药物奠定基础.方法 合成一个长度为115 nt含有25个随机序列的单链DNA随机文库,通过体外转录构建出单链RNA适配子随机文库,以肝脏ASGPR大亚基为靶蛋白,采用SELEX(systematic evolution of ligands by exponential enrichment)技术筛选具有高亲和力的ASGPR特异性RNA适配子;通过膜结合测定实验、凝胶阻滞实验鉴定筛选适配子对靶蛋白的特异性和亲和力.结果 经过12轮筛选获得了具有高亲和力的肝脏ASGPR特异性RNA适配子.结论 成功地筛选出了具有高亲和力的肝脏ASGPR特异性RNA适配子库.     

ASGPR单链抗体-蜂毒肽融合蛋白的构建及其溶红细胞效应

去唾液酸糖蛋白受体（asialoglycoprotein receptor，ASGPR）是一种异源低聚物的内吞受体，定位于肝脏实质细胞朝向窦状隙一侧的细胞膜表面，在介导肝脏疾病靶向治疗方面具有潜在应用价值。我们在获得抗ASGPR单链抗体CI的基础上，     

去唾液酸糖蛋白受体的研究现状

去唾液酸糖蛋白受体(asialoglycoprotein receptor,ASGPR),也被称为肝细胞半乳糖/N-乙酰基葡糖胺受体,或者Ashwell-Morell受体[1]。它主要表达于肝窦状间隙的肝实质细胞表面,是第一个被发现的凝集素。由于它结合配体的钙离子依赖性,因此属于C型凝集素。ASGPR能够介导去唾液酸化的糖蛋白被肝细胞内吞降解[2]。目前已知的ASGPR的配体非常多,提示其在糖蛋白代谢、脂代谢、凋亡细胞降解、调节凝血、介导病毒进入细胞和自身免疫性炎症反应等多个生理环节均发挥着重要的作用[3]。     

99m Tc-Sandostatin显像早期诊断高表达生长抑素受体胰腺癌的实验研究

目的 :99mTc -Sandostatin显像对胰腺癌的早期诊断价值及其瘤体组织生长抑素受体 (SSR)的表达情况。方法 :用99mTc标记Sandostatin进行裸鼠胰腺癌模型显像 ,计算瘤体与对侧正常组织的放射性比值 (T/N) ;用RT -PCR方法检测瘤体组织的SSR1、SSR2、SSR2、SSR5mRNA的表达。结果 :1 6只胰腺癌裸鼠模型中有 1 1只显像阳性 ,5只显像阴性。显像阳性鼠的T/N为 2 5 3± 0 84 ,显像阴性鼠的T/N为 1 0 4± 0 0 6 ,两者之间有显著性差异 (P <0 0 1 )。显像阳性的瘤体组织其SSR1、SSR2、SSR5mRNA的表达分别显著高于显像阴性的瘤体组织的SSR1、SSR2、SSR5mRNA表达 ,P均 <0 .0 1。结论 :99mTc -Sandostatin生长抑素受体显像是一种无创、安全、有效、简便的检查方法 ,对胰腺肿瘤有一定的诊断价值 ,但只有生长抑素受体表达水平高的肿瘤能够显像     

慢性乙型肝炎患者血清IL-6水平与多聚人血清白蛋白受体的相关性研究

目的　探讨慢性乙型肝炎患者血清白细胞介素 6 (Interleukin 6 ,IL 6 )与乙型肝炎病毒(HBV)复制的关系及其在肝脏病理损伤中的作用。方法　对 6 6例不同类型的乙型肝炎标志物阳性患者及不同程度的慢性乙型肝炎患者血清IL 6水平进行检测 ,同时检测HBV复制标志物———多聚人血清白蛋白受体 (polymerizedhumanserumalbuminreceptor,PHSA R)。结果　HBV携带组及轻度慢性乙型肝炎组中PHSA R阳性患者血清IL 6水平高于PHSA R阴性患者 (P <0 .0 1) ;38份PHSA R阳性患者PHSA R检测吸光度A值与血清IL 6水平显著相关 ,r =0 .6 94(P <0 .0 1) ;血清IL 6水平按乙型肝炎病情严重程度依次增高。结论　血清IL 6水平与HBV复制及肝脏损伤程度相关 ,血清IL 6水平检测作为指示乙型肝炎患者HBV的复制及辅助病情和疗效的判定 ,可能是一个新的有价值的指标     

胸腺瘤中EGFR和IGF-1R的表达及其意义

目的探讨胸腺瘤组织中表皮生长因子受体(epidermal growth factor receptor,EGFR)和胰岛素样生长因子-1受体(insulin-like growth factor-1 receptor,IGF-1R)的表达及其临床意义。方法应用免疫组化En Vision两步法检测63例胸腺瘤和15例胸腺滤泡性增生组织中EGFR和IGF-1R的表达。结果 EGFR和IGF-1R在胸腺瘤中的阳性率分别为50.8%(32/63)和55.6%(35/63),在胸腺滤泡性增生组织中的阳性率为0(0/15)和20%(3/15)。胸腺瘤组与胸腺滤泡性增生组相比,EGFR和IGF-1R蛋白表达差异均有统计学意义(P0.01,P0.03),EGFR和IGF-1R高表达与胸腺瘤患者年龄、性别、肿瘤大小、是否合并重症肌无力、WHO分型均无关,但与Masaoka分期有关(P0.01)。EGFR和IGF-1R在胸腺瘤中表达呈正相关(r=0.270,P=0.032)。结论 EGFR和IGF-1R高表达可能与胸腺瘤的发生、发展及侵袭有较密切的关系。联合检测EGFR和IGF-1R表达有助于更好地评估胸腺瘤的临床分期,为临床制定合理的治疗方案、改善患者预后提供帮助。     

脱唾液酸糖蛋白受体介导的vp3基因靶向性治疗肝癌的实验研究

目的利用肝细胞表面存在特异的脱唾液酸糖蛋白受体(asialoglycoprotein receptor,ASGPR),探索ASGPR介导的vp3基因肝细胞靶向性治疗肝癌的方法。方法将携带vp3基因的质粒通过多聚左旋赖氨酸(poly-L-lysine,PLL)与该受体的天然配体脱唾液酸粘蛋白(asialoorosomucoid,Asor)结合,获得Asor-PLL-vp3复合物;通过体外转染、放射性同位素标记检测和动物实验鉴定该复合物的肝细胞靶向性。结果 成功制备了较纯的可溶性的蛋白-核酸复合物;体内外实验结果表明Asor-PLL-vp3复合物具有良好的肝细胞靶向性。结论通过制备Asor-PLL-vp3复合物,利用ASGPR介导实现了vp3的肝细胞靶向性基因转移,证实了该复合物具有体内靶向性治疗肝癌的可行性。     

白细胞介素-15及其受体

白细胞介素-15(IL-15)是一种新发现的细胞因子,其生物学性质与IL-2相似。IL-15的受体由IL-15Rα、IL-2Rβ、IL-2Rγ组成,其中IL-2Rγ是参与IL-15信号传递过程的必要成分。IL-15和IL-2的体内表达及受体分布存在差异预示着IL-15在体内具有独特的生物学作用。     

TNFSF14及其受体LTβR和HVEM在病毒肝炎中的作用

目的:探讨TNFSF14(即LIGHT)及其受体LTβR和HVEM在暴发性病毒肝炎中的作用。方法:MHV-3感染易感小鼠建立暴发性病毒肝炎模型,通过HE染色和血清ALT水平的测定比较了LIGHT KO和WT两组小鼠的肝损情况;定量PCR技术检测了MHV-3感染C57BL/6小鼠后各时相点(0 h、12 h、24 h、48 h、72 h)肝脏和脾脏组织HVEM和LTβR的mRNA水平。流式细胞术检测了临床病毒性重症肝炎病人PBMC中HVEM和LTβR的表达情况。结果:MHV-3感染72 h后,WT小鼠的肝脏出现明显坏死灶,而LIGHT KO小鼠的肝脏则未见异常;LIGHT KO小鼠血清中的ALT浓度也显著低于WT组(P0.01)。MHV-3感染48 h后,C57BL/6小鼠脾脏中HVEM及LTβR的mRNA水平均有显著升高(P0.05);肝脏中LTβR表达在12 h时就有显著上调(P0.01)。与之一致的是,临床重症肝炎病人PBMC中HVEM和LTβR的表达较正常人均有明显升高。结论:TNFSF14可能通过与其受体LTβR和HVEM的相互作用在病毒诱发的暴发性肝炎中扮演重要角色。     

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