siRNA下调SNCG基因表达抑制膀胱癌细胞系5637的增殖和侵袭

目的探讨突触核蛋白γ(SNCG)基因对膀胱癌细胞5637增殖和侵袭能力的影响。方法设计并合成3对SNCG-siRNA序列,转染5637细胞后,用RT-q PCR和Western blot检测SNCG的表达。分别通过CCK-8增殖实验和侵袭实验评估5637细胞增殖和侵袭能力。结果与膀胱癌细胞系T24、EJ和UMUC-3相比,5637细胞中SNCG表达水平最高(P0.05);与空白和阴性对照组相比,3对SNCG-siRNA序列转染5637后均可抑制SNCG mRNA和SNCG蛋白的表达(P0.05),但SNCG-siRNA-244组抑制效果最明显;实验组5637细胞的增殖受到明显抑制(P0.05),且细胞的侵袭能力显著下降(P0.05)。结论通过特异性干扰SNCG基因的表达可抑制膀胱癌细胞5637的增殖和侵袭,SNCG的siRNA序列可能成为膀胱癌治疗的新靶点。     

蛇床子素调控PI3K/AKT通路对膀胱癌细胞增殖、侵袭、迁移与凋亡的影响

目的 探讨蛇床子素调控PI3K/AKT/mTOR信号对膀胱癌T24细胞增殖、侵袭、迁移、凋亡的影响.方法 用不同浓度的蛇床子素处理人膀胱癌T24细胞,计算IC50浓度.采用CCK-8方法检测蛇床子素对T24细胞增殖的影响,采用Transwell实验检测蛇床子素对细胞迁移和侵袭的影响,采用流式细胞仪检测蛇床子素对T24细胞凋亡的影响,采用Western blot方法检测抗凋亡蛋白及PI3K/AKT/mTOR信号通路相关蛋白表达水平.结果 蛇床子素抑制T24细胞增殖的IC50为42.4μmol/L.42.4μmol/L蛇床子素处理24、48、72h后,T24细胞增殖能力显著降低(P＜0.05).42.4μmol/L蛇床子素处理24h后,T24细胞的迁移能力和侵袭能力降低、细胞凋亡率升高(P＜0.05);T24细胞中p-AKT、p-mTOR、P70与Cyclind1蛋白表达水平降低(P＜0.05);抗凋亡蛋白Bcl-2表达降低,促凋亡蛋白Bax和Caspase-3蛋白表达升高(P＜0.05).结论 蛇床子素可通过调控PI3K/AKT/mTOR信号通路抑制膀胱癌T24细胞增殖、迁移和侵袭,促进凋亡.     

PLCε通过PKCα/β/TBX3信号通路调控人膀胱癌细胞系T24的迁移和侵袭

目的体外实验研究PLCε基因调节人膀胱癌细胞迁移和侵袭的分子机制。方法设计并合成针对PLCε基因mRNA的寡核苷酸序列,构建重组腺病毒Ad-sh PLCε。T24细胞感染Ad-sh PLCε腺病毒后,用Western blot检测PKCα/β及TBX3、E-cadherin的表达;用划痕实验、Transwell迁移和侵袭实验检测膀胱癌细胞T24的迁移、侵袭能力。结果 Ad-sh PLCε重组腺病毒感染膀胱癌细胞T24,对其PLCεmRNA表达抑制率为75.6%,对其PLCε蛋白表达抑制率为67.4%。Ad-sh PLCε感染组T24细胞迁移能力较空载组和空白对照组明显减弱(P0.05);重组腺病毒Ad-sh PLCε感染组T24细胞穿膜细胞数较空载组和空白对照组明显减少(P0.05)。Ad-sh PLCε重组腺病毒感染膀胱癌T24细胞后下游PKCα/β的活化受到抑制(P0.05),同时,TBX3的表达减少,而E-cadherin的表达增高(P0.05)。结论通过以重组腺病毒干扰抑制PLCε基因,能有效抑制膀胱癌T24细胞系中PLCε下游PKCα/β的活化情况及TBX3,E-cadherin的表达变化,并且对T24细胞的迁移、侵袭能力具有一定的抑制作用。     

肝癌衍生生长因子与膀胱癌转移的相关性及其对细胞侵袭能力影响

目的探讨肝癌衍生生长因子(HDGF)基因与膀胱癌转移的相关性,及其稳定表达对膀胱癌细胞侵袭能力的影响。方法应用荧光定量PCR检测原发未转移膀胱癌和原发伴转移膀胱癌组织中HDGF mRNA的表达。设计并合成HDGF特异性的siRNA,转染膀胱癌T24细胞系,检测转染后细胞侵袭能力的变化。结果原发伴转移膀胱癌组织中HDGF mRNA表达较原发未转移膀胱癌中明显上调(P0.05)。RNA干扰后,HDGF蛋白明显降低,细胞侵袭能力也随之明显降低(P0.05)。结论 HDGF基因与膀胱癌的转移相关,其表达下调能够抑制T24细胞的侵袭能力。     

青蒿素对人膀胱癌T24细胞增殖、凋亡、迁移与侵袭的影响

目的探讨青蒿素对人膀胱癌T24细胞增殖、凋亡、迁移与侵袭的影响及可能机制。方法将人膀胱癌T24细胞分为空白对照组与青蒿素组(50、100、200μmol/L)。不同浓度青蒿素干预48h后,MTT方法检测T24细胞的增殖活力,流式细胞术检测T24细胞的凋亡率。200μmol/L青蒿素干预48 h后,划痕实验与Transwell侵袭实验检测青蒿素对T24细胞迁移与侵袭能力的影响;Western blot实验检测T24细胞中PI3K、p-Akt与pmTOR的表达。结果不同浓度青蒿素均能显著抑制T24细胞增殖,并促进细胞凋亡,且呈浓度依赖性(P0.01)。200μmol/L青蒿素干预48 h后,T24细胞迁移与侵袭能力显著降低,T24细胞中PI3K的表达以及Akt和mTOR的磷酸化水平降低(P0.01)。结论青蒿素能够通过抑制PI3K/Akt/mTOR信号通路抑制膀胱癌T24细胞增殖、迁移与侵袭,并促进凋亡。     

miR-451a通过靶向调节MEF2D抑制膀胱癌细胞的增殖、迁移和侵袭

目的研究miR-451a在膀胱癌中的表达及对膀胱癌发生发展的影响。方法通过实时定量PCR(real-time PCR)检测miR-451a在膀胱癌细胞系及组织标本中的表达。采用real-time PCR和Western blot检测MEF2D在膀胱癌组织及转染miR-451a mimics和inhibitor的T24细胞中的表达。双荧光素酶基因报告实验分析MEF2D是否为miR-451a直接的靶基因。通过MTT,Transwell迁移和侵袭实验检测T24细胞在转入miR-451a mimics和inhibitor后细胞增殖、迁移和侵袭能力的变化。结果 miR-451a在膀胱癌细胞及组织中的表达水平下调。miR-451a抑制了T24细胞的增殖、迁移和侵袭。双荧光素酶基因报告证实MEF2D为miR-451a的直接靶基因。miR-451a能够降低T24细胞MEF2DmRNA和蛋白表达水平。结论 miR-451a在膀胱癌中表达下调,通过靶向调节MDF2D起到了抑癌的作用,可能成为膀胱癌诊疗的潜在靶点。     

紫草素对人膀胱癌T24细胞增殖、凋亡、迁移与侵袭的影响

目的探讨紫草素对人膀胱癌T24细胞增殖、凋亡、迁移与侵袭的影响及可能机制。方法将人膀胱癌T24细胞分为空白对照组与紫草素组(10、20、40μmol/L)。不同浓度紫草素干预48h后,MTT方法检测T24细胞的增殖活力,流式细胞术检测T24细胞的凋亡率。40μmol/L紫草素干预48 h后,Transwell实验检测紫草素对T24细胞迁移与侵袭能力的影响;Western blot实验检测T24细胞中半胱氨酸天冬氨酸蛋白水解酶3/9(Caspase-3/Caspase-9)与基质金属蛋白酶2/9(MMP-2/MMP-9)的表达。结果不同浓度紫草素均能显著抑制T24细胞增殖,并促进细胞凋亡,且呈浓度依赖性(P0.01)。40μmol/L紫草素干预48 h后,T24细胞迁移与侵袭能力显著降低,T24细胞中Caspase-3、Caspase-9、MMP-2与MMP-9的蛋白表达水平均显著升高(P0.01)。结论紫草素能够抑制膀胱癌T24细胞增殖、迁移与侵袭,并促进凋亡。     

miR-34a调控HMGB1表达对人膀胱癌细胞增殖的影响

目的探讨miR-34a对膀胱癌T24细胞增殖的影响。方法合成miR-34a的模拟物并转染膀胱癌T24细胞,荧光显微镜下观察转染效率,实时荧光定量PCR法检测转染48 h后,T24细胞中miR-34a的表达情况,MTT法检测转染24、48和72 h后T24细胞的增殖情况,实时荧光定量PCR法和western blot方法检测转染48 h后膀胱癌细胞内源性HMGB1 m RNA及蛋白的表达变化。结果 miR-34a的模拟物转染至T24细胞的效率为80%,转染miR-34a模拟物48 h后,T24细胞内miR-34a的表达显著升高(P0.05),T24细胞的增殖率显著低于阴性对照组(P0.05),且呈时间依赖性,HMGB1 m RNA及蛋白的表达水平明显低于阴性对照组(P0.05)。结论 miR-34a抑制膀胱癌T24细胞增殖可能与靶向HMGB1基因相关。     

miR-205调控YES1表达对人膀胱癌细胞增殖的影响

目的探讨miR-205对膀胱癌T24细胞增殖的影响。方法合成miR-205的模拟物并转染膀胱癌T24细胞,荧光显微镜下观察转染效率,实时荧光定量PCR法检测转染48 h后,T24细胞中miR-205的表达情况,MTT法检测转染24、48和72 h后,T24细胞的增殖情况,实时荧光定量PCR法和western blot检测转染48 h后膀胱癌细胞内源性YES1 mRNA及蛋白的表达变化。结果 miR-205的模拟物转染至T24细胞的效率为80%,转染miR-205模拟物48 h后,T24细胞内miR-205的表达水平显著升高(P0.05),T24细胞的增殖率显著低于阴性对照组(P0.05),且呈时间依赖性,YES1 mRNA及蛋白的表达水平明显低于阴性对照组(P0.05)。结论 miR-205抑制膀胱癌T24细胞增殖可能与靶向YES1基因相关。     

RNA干扰EMS1基因表达对人胃癌MGC803细胞增殖和迁移的影响

目的探讨RNA干扰EMS1基因表达对人胃癌MGC803细胞增殖和迁移的影响。方法为检测下调EMS1基因表达后MGC803细胞功能的变化,运用平皿集落形成实验检测其增殖能力;流式细胞仪分析细胞周期和凋亡;Transwell迁移和侵袭实验观察细胞迁移和侵袭能力的变化。结果下调MGC803细胞中EMS1基因表达后,MGC803细胞增殖、迁移和侵袭能力受到抑制,与对照组相比差异有显著性(P0.05),而对细胞周期和凋亡无明显影响。结论 RNA干扰EMS1基因可抑制胃癌MGC803细胞的增殖和迁移侵袭能力。     

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。     

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     

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     

侧脑室注射链脲佐菌素对大鼠海马神经元突触的影响

为观察链脲佐菌素(streptozotocin,STZ)双侧侧脑室注射对大鼠海马神经元突触的影响,本研究将Wistar大鼠随机分为对照组和模型组,模型组大鼠分别于第1、3d双侧侧脑室重复注射STZ3mg/kg,对照组以人工脑脊液代替STZ。21d后,取大鼠海马,免疫组织化学染色及Western blotting方法观察突触素、活性调节细胞骨架相关蛋白(activity-regulated cytoskeletal-associatedprotein,Arc)的表达;电镜观察海马CA1区神经元突触超微结构的改变。结果显示:与对照组相比,模型组大鼠海马内突触素蛋白表达显著减少,而Arc蛋白表达显著增多;模型组海马CA1区神经毡内突触结构异常,突触小泡聚集增多。以上结果提示:脑室注射STZ可影响大鼠海马突触相关蛋白的表达,引起突触超微结构异常,干扰了神经元突触信号的传导。