IL-2促进C6胶质瘤细胞增殖及IL-2R在该细胞的表达

目的　观察 IL - 2对 C6大鼠星形神经胶质瘤细胞增殖的影响 ,并从蛋白及 m RNA水平观察白细胞介素 - 2受体(IL - 2 R)α,β,γ 3条链在 C6神经胶质瘤细胞中的表达 .方法　应用细胞培养、MTT法、3H- Td R掺入法、免疫细胞化学方法和 RT- PCR技术 .结果　 1IL - 2 (1× 10 4 ～ 1× 10 6 U·L- 1 )可显著促进 C6细胞的增殖 ;2 C6细胞中检测到 IL - 2 R的 β、γ2条链的免疫反应阳性物质 ;3IL- 2 Rβ,γ m RNA在C6细胞中均有表达 .结论　 IL - 2可显著促进 C6神经胶质瘤细胞的增殖 ,C6细胞表达 IL- 2 Rβ、γ2条链的蛋白与 m RNA,可能介导 IL- 2增殖信号的传递 ,从而初步证实 IL- 2可直接作用于神经胶质细胞并进一步阐明了 IL- 2增殖信号的转导机制 ,为揭示细胞因子在神经系统中的普遍作用机制提供更多证据 .     

柴胡皂苷元D对C6大鼠神经胶质瘤细胞内游离Ca2+浓度的影响

目的探讨柴胡皂苷元D (Saikogenin D, SGD)对C6大鼠神经胶质瘤细胞内游离Ca2 浓度[Ca2 ]i的影响.方法采用 Fura-2/AM荧光指示剂测定SGD引起的C6大鼠神经胶质瘤细胞[Ca2 ]i变化.结果 SGD(1×10-5～1×10-4 mol/L)剂量依赖性地升高[Ca2 ]i,其EC50为3.5×10-5 mol/L.SGD的升高[Ca2 ]i作用被Thapsigargin显著降低.2-aminoethoxydiphenylborate (2-APB, 1×10-4 mol/L) 和 U73122 (2×10-6 mol/L)显著降低组胺的升高[Ca2 ]i作用,但对SGD的升高[Ca2 ]i作用无影响.咖啡因和阿诺碱不影响SGD升高[Ca2 ]i.结论 SGD通过独立于肌醇三磷酸(IP3)受体系统和阿诺碱受体系统的机制,引起细胞内钙释放,导致[Ca2 ]i升高.     

G蛋白参与K物质对心肌细胞内游离钙离子浓度的影响

目的　观测 K物质对体外培养的乳鼠心肌细胞内游离钙离子浓度的影响 ,并探讨作用机制 .方法　应用钙离子荧光指示剂 Fluo- 3AM负载原代培养的大鼠心肌细胞 ,通过流式细胞仪检测心肌细胞内游离钙离子浓度 ([Ca2 + ]i)变化 ;分别应用速激肽受体拮抗剂 - DSP和抗水解 GDP类似物 -GDPβS,观察二者对 K物质诱导的 [Ca2 + ]i变化的影响 .结果　 SK能升高 [Ca2 + ]i,即由对照组的 173± 2 0 nmol· L- 1升高至 2 84± 2 0 nmol· L- 1 (P<0 .0 1) ,且在 1.78× 10 - 5～ 1.78×10 - 7mol· L- 1 浓度范围内存有剂量 -效应关系 ;DSP和GDPβS均可阻断 SK诱导的心肌细胞 [Ca2 + ]i升高的效应 .结论　SK可升高心肌细胞 [Ca2 + ]i,其作用有 G蛋白参与     

雌激素β受体及其与卵巢癌的关系研究进展

雌激素(estrogen,E)是一种类固醇性激素,通过与其特异性受体相结合进而调节一系列基因的表达而发挥生物学效应.人体内雌激素靶器官[1]和一些非靶器官恶性肿瘤细胞中存在雌激素受体(estrogen receptor,ER),目前有证据显示雌激素通过其特异性受体ERα和ERβ在介导卵巢癌发生中起着重要作用.在原发卵巢上皮性肿瘤培养细胞中,ERα mRNA的表达较正常卵巢上皮培养细胞高10倍,ERα/ERβ是正常卵巢上皮细胞的2倍[2],但是90%来源于上皮的恶性卵巢肿瘤表达低水平的ERα,而卵巢癌细胞ERβ的高表达可抑制肿瘤细胞的增生和浸润,同时加速肿瘤细胞的凋亡.对ER的深入研究有助于了解其在生理功能调节和某些重大疾病发生及治疗中的作用,本文重点综述了ERβ与卵巢癌关系的研究进展.     

异补骨脂素和蜕皮甾酮对人乳腺癌T47D细胞增殖及ER亚型表达的影响

目的利用人乳腺癌T47D细胞观察异补骨脂素和蜕皮甾酮对雌激素受体阳性细胞增殖的作用,并检测其对T47D细胞雌激素受体亚型ERα、ERβ表达的影响。方法采用MTT细胞增殖实验观察中药补骨脂、川牛膝的两种活性成分:异补骨脂素和蜕皮甾酮对ERα、ERβ阳性细胞T47D增殖的影响;通过流式细胞术检测细胞增殖周期的变化;用半定量RT-PCR法检测上述成分对靶细胞ERα、ERβmRNA表达情况的影响。结果10-6mol/L和10-7mol/L异补骨脂素和蜕皮甾酮能够显著促进培养的T47D细胞增殖,提高细胞分裂增殖指数,表现出雌激素样作用;RT-PCR结果显示:10-6mol/L和10-7mol/L异补骨脂素和蜕皮甾酮均可使ERαmRNA表达显著增加,异补骨脂素同时也可提高ERβmRNA表达。结论异补骨脂素和蜕皮甾酮具有植物雌激素作用,并可影响靶细胞ER亚型的mRNA表达水平。     

雌激素受体α和β mRNA变异型在胎盘组织的表达及定位

目的 探讨人足月胎盘组织雌激素受体α、β（ERα、ERβ）的mRNA变异型种类及其在胎盘的组织细胞学定位。方法 采用逆转录聚合酶链反应技术和免疫组织化学技术检测正常足月妊娠胎盘组织中ERα、ERβ表达及细胞学定位。结果 人足月胎盘组织中有ERα、ERβmRNA的表达,胎盘组织中ERβmRNA的表达为ERβ5变异型ERα表达定位于滋养层细胞滋养细胞核,ERβ表达定位于滋养层合体滋养细胞胞浆。结果 ERβ5是胎盘组织ERβ的变异型种类,定位于胎盘合体滋养细胞,与胎盘合成和分泌雌激素有关。     

淫羊藿苷对多发性硬化患者PBMC ER、GR mRNA表达的影响

目的 探讨淫羊藿苷(ICA)对多发性硬化(MS)患者外周血单个核细胞(PBMC)中ERα、ERβ、GR mRNA表达水平的影响及其剂效关系.方法 分离、提取MS患者及健康人PBMC并将其均分为空白对照组、雌激素组、高、中、低剂量ICA组以及对应浓度的空白血清对照组各8个亚组,培养后离心,以RQ-PCR法检测各组PBMC中ERα、ERβ、GR mRNA的表达量.结果 MS患者高、中剂量ICA及雌激素组ERα表达量较对照组明显升高,差异有统计学意义(P<0.05);MS患者高剂量ICA及雌激素组ERβ mRNA表达量较对照组明显升高,差异有统计学意义(P<0.05).MS患者和健康人中实验组与各对照组比较GR mRNA表达量无明显改变,差异无统计学意义(P>0.05).MS患者与健康人高剂量ICA组比较,ERα、ERβ mRNA表达量明显升高,差异有统计学意义(P<0.05).结论 ICA可以提高MS患者PBMC中ERα、ERβ mRNA的表达,具有拟雌激素样作用,但对MS患者PBMC中GR mRNA的表达无明显干预作用.     

血管钠肽抑制低氧刺激心成纤维细胞c-fos的表达

目的　研究血管钠肽 (VNP)对低氧作用时心成纤维细胞增殖的影响 ,并对其机制进行探讨 .方法　分离纯化乳鼠心成纤维细胞 ,随机分为 4组 :对照组、低氧组 (2 0～ 30m L· L- 1 )、VNP组 (10 - 8～ 10 - 6 mol· L- 1 )和 VNP (10 - 6mol· L- 1 ) +低氧组 .以免疫组织化学染色方法观察各组 c-Fos的表达情况 ,采用激光共聚焦方法测定了 [Ca2 + ]i 水平 .结果　 1低氧组较对照组可以显著升高 Fos样免疫阳性细胞数及染色强度 (P<0 .0 5 ) ;2 VNP预处理心成纤维细胞可以减弱低氧的作用 (P<0 .0 5 vs低氧组 ) ,但 Fos的表达量仍高于对照组 (P<0 .0 5 ) ;3对照组 [Ca2 + ]i 水平无显著变化 ,低氧组 [Ca2 + ]i 水平显著升高 ,而 VNP能使升高的 [Ca2 + ]i 水平较对照组和低氧组显著降低 (P<0 .0 5 ) .结论　 VNP能减弱低氧对心成纤维细胞生长的刺激作用 ,其机制可能与 Ca2 + 等信号转导分子及 c- fos表达有关     

5-羟色胺对培养胃底平滑肌细胞内游离钙动员的影响

目的　研究 5 - HT诱导胃底平滑肌细胞内钙动员的机制 .方法　采用 Ca2 +指示剂 Fluo- 3/ AM作为细胞内钙离子的荧光探针负载培养的胃底平滑肌细胞 ,共聚焦技术检测细胞内钙荧光强度的变化 .结果　基础状态下 SFSMC[Ca2 + ]i 荧光强度 (FI)为 2 6 4± 15 ,5 - HT 10μmol· L- 1 使荧光强度的变化 ΔFI为 16 .5± 2 .6 ;细胞外无钙时 ,5 - HT升高[Ca2 + ]作用被减弱 ,但除去细胞外钙 ,并使用内罗啶 (ryan-odine)孵育后 ,5 - HT 不再引起荧光强度的变化 ;10μmol· L- 1 米安舍林 (mianserin)可部分拮抗 5 - HT升高[Ca2 + ]i 的作用 ,赛更定 (cyprohetadine)不能抑制 5 - HT升高的胞内钙 ;Mn92 0 2和拉西地平 (lacidipine)均能完全抑制 5 -HT升高 [Ca2 + ]i 的作用 .结论　 5 - HT可通过促进外钙内流及钙池 (SR)释放使 [Ca2 + ]i 升高 ;在胃底平滑肌 5 - HT升高胞内钙部分通过 5 - HT2 受体 ,而不是通过 5 - HT1 C受体 ;5 -羟色胺通过 L型钙通道促外钙内流 ;二氢吡啶类钙拮抗剂能通过阻滞 L 型钙通道 ,而完全抑制 5 - HT促胞内钙升高的作用     

雌二醇促进正常宫颈上皮永生化细胞系End1/E6E7增殖的研究

[目的 ]研究在 17- β -E2 作用下正常宫颈上皮永生化细胞End1/E6E7的生长增殖和HPV16 /E6E7基因、ERβ表达的变化 ,探讨雌激素及HPV与ERβ在宫颈上皮病变发展过程中的作用。[方法 ]选取ERα(- ) /ERβ( )的正常宫颈上皮永生化细胞系End1/E6E7细胞 ,应用MTT比色实验及流式细胞术研究 17- β -E2 对其生长与增殖的调控作用 ;应用RT -PCR方法半定量研究 17- β -E2 对该细胞中HPV16 /E6E7基因及ERβ基因表达的影响。 [结果 ]随 17- β -E2 浓度增加 ,倍增时间缩短 ,MTT吸光度值增高 (P =0 .0 4 5 ) ,细胞周期G0 、G1期比例下降 ,G2 、M及S期比例上升 (P =0 .0 0 2 ) ;HPV16 /E6E7mRNA表达增强 (P =0 .0 19) ;ERβmRNA表达无明显改变 (P =1.0 0 )。 [结论 ]雌激素可能通过ERβ以外的途径促进HPV16 /E6E7基因的表达 ,进而促进永生化宫颈上皮的增殖生长。     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.