羊栖菜多糖SFPS-B1诱导SGC-7901细胞凋亡及对细胞［Ca2+］i和pH值的影响

目的 研究羊栖菜多糖 SFPS-B1 诱导人胃癌细胞 SGC-7901 凋亡作用及对细胞［Ca²⁺］_i 和 pH 值的影响。方法 采用 MTT 法检测 SFPS-B1 对细胞增殖的影响;采用荧光显微镜观察细胞凋亡形态;采用激光共聚焦显微镜观察 SFPS-B1 对 SGC-7901 细胞［Ca²⁺］_i 和 pH 值的影响。结果 SFPS-B1 对 SGC-7901 细胞增殖有抑制作用,可使细胞体积缩小、出现凋亡小体。药物作用后细胞［Ca²⁺］_i 明显上升,pH 值明显降低。结论 SFPS-B1 具有抑制人胃癌 SGC-7901 细胞增殖并诱导凋亡作用,对细胞［Ca²⁺］_i 和 pH 值的影响在其诱导 SGC-7901 细胞凋亡中发挥了作用。     

野西瓜正丁醇萃取物对HepG2细胞线粒体膜电位和［Ca2+］i的影响

目的 研究野西瓜正丁醇萃取物诱导人肝癌细胞 HepG2 细胞凋亡的机制,观察其对 HepG2 线粒体膜电位和细胞内 Ca²⁺ 浓度［Ca²⁺］_i 的影响。方法 经流式细胞仪观察野西瓜正丁醇萃取物对线粒体膜电位的影响;激光共聚焦显微镜检测野西瓜正丁醇萃取物作用前后,HepG2 细胞［Ca²⁺］_i 的变化。结果 野西瓜正丁醇萃取物可不同程度降低 HepG2 细胞线粒体跨膜电位,此外,中、高剂量的野西瓜正丁醇萃取物还可以显著升高［Ca²⁺］_i,造成钙稳态平衡。结论 野西瓜正丁醇萃取物降低线粒体膜电位,开放 MPTP 孔道,造成细胞内 Ca²⁺ 超载,诱导 HepG2 细胞凋亡。     

龙葵碱对雄性小鼠睾丸支持细胞毒性的初步研究

目的 初步探讨龙葵碱对睾丸支持细胞的毒性。方法 原代培养睾丸支持细胞,MTT 法检测不同浓度龙葵碱对于支持细胞的毒性作用;激光共聚焦显微镜观察细胞内线粒体膜电位的变化以及［Ca²⁺］_i 的改变。结果 龙葵碱作用于睾丸支持细胞 72 h 的 IC₅₀ 为 22.29 μmol/L。随着剂量的增大,细胞内线粒体膜电位降低,［Ca²⁺］_i 升高。结论 龙葵碱通过损伤小鼠睾丸支持细胞线粒体,升高细胞 ［Ca²⁺］_i,从而对睾丸支持细胞产生毒性作用。     

冬凌草甲素抑制人胃癌SGC-7901细胞生长的G2/M期阻滞机制研究

目的 研究冬凌草甲素抑制人胃癌 SGC-7901 细胞生长作用及 G₂/M 期阻滞机制。方法 MTT 法检测冬凌草甲素对 SGC-7901 细胞生长的抑制作用;流式细胞术检测冬凌草甲素对 SGC-7901 细胞周期的影响;Western blotting 法检测冬凌草甲素对 Cdk1、Cyclin B1 两种蛋白表达的影响。结果 冬凌草甲素作用于 SGC-7901 细胞的 IC₅₀ 为 15.64 μmol/L;冬凌草甲素对 G₂/M 期细胞的阻滞作用随着浓度的增加而增强;Cdk1 和 Cyclin B1 蛋白的表达量随着冬凌草甲素浓度的增大显著降低。结论 冬凌草甲素通过下调 SGC-7901 细胞内 Cdk1、CyclinB1 两种蛋白的表达,阻滞细胞于 G₂/M 期而抑制 SGC-7901 细胞生长。     

针刺对局灶性脑缺血大鼠海马神经元细胞[Ca2+]i的影响

[目的]研究脑缺血不同时点大鼠海马神经元内游离Ca²⁺浓度[Ca²⁺]_i及醒脑开窍针刺对其影响,探讨醒脑开窍针刺法早期干预对脑缺血的治疗作用。[方法]建立大脑中动脉所致局灶性脑缺血(MCAO)模型,采用醒脑开窍针刺法治疗,采用激光扫描共聚焦显微技术动态观察脑组织海马CA1区锥体细胞[Ca²⁺]_i在不同时间点的变化。[结果]与正常组大鼠相比,模型组大鼠脑组织海马CA1区锥体细胞内游离[Ca²⁺]_i(以细胞内Ca²⁺相对荧光强度表示)在局灶性脑缺血1 h时升高,持续升高至缺血24 h时(P<0.05)。假手术组与正常组相比[,Ca²⁺]_i变化差异无统计学意义(P>0.05)。相应时间点非穴位针刺组与模型组[Ca²⁺]_i比较,无统计学意义(P>0.05)。在相应时间点,醒脑开窍针刺组[Ca²⁺]_i低于模型组(P<0.01)。[结论]急性局灶性脑缺血后大鼠海马神经细胞[Ca²⁺]_i随缺血时间的延长而持续升高,提示细胞内钙超载;醒脑开窍针刺组能有效调节缺血区的[Ca²⁺]_i,提示在缺血后针刺治疗效果越早越好,为临床及早应用针刺治疗缺血性脑血管病提供了理论依据。     

野西瓜总生物碱诱导 HepG2 细胞凋亡与［Ca2+］i 变化的相关性

目的 探讨野西瓜总生物碱 (Capparis spinosa alkaloid, CSA) 对人肝癌 HepG2 细胞的杀伤和诱导凋亡的作用机制。方法 MTT 法研究 CSA 对人肝癌 HepG2 的杀伤作用;荧光显微镜观察 HepG2 细胞形态;流式细胞仪研究 CSA 对 HepG2 细胞的凋亡诱导作用;激光共聚焦显微镜检测 CSA 对 HepG2 细胞内［Ca²⁺］_i 的影响。结果 CSA 对人肝癌 HepG2 有明显细胞毒性作用,并且有剂量依赖性,IC₅₀ 为 142.82 μg/mL;HepG2 细胞在 CSA 作用后出现特征性凋亡形态特征,凋亡细胞比率明显高于自然凋亡率;且阻断细胞由S期向 G₂ 期的移行,CSA 明显升高 HepG2 细胞［Ca²⁺］_i,并与药物质量浓度呈量效正相关。结论 CSA 对人肝癌 HepG2 有明显的杀伤和促凋亡作用,其机制可能与 CSA 造成肿瘤细胞内钙离子超载有关。     

汉防己甲素对人神经母细胞瘤SH-SY5Y增殖和凋亡的影响

目的 探讨汉防己甲素对神经母细胞瘤SH-SY5Y细胞株的增殖抑制和诱导凋亡的作用。方法 通过CCK-8实验检测汉防己甲素对于细胞生长的抑制率,流式细胞术检测Tet作用于细胞后,对细胞活性氧、线粒体膜电位、凋亡和周期的影响。结果 汉防己甲素能显著抑制SH-SY5Y细胞生长,基本呈时间－剂量依赖性。流式细胞术检测显示不同浓度汉防己甲素处理后,活性氧明显升高,线粒体膜电位明显下降,细胞凋亡比例明显升高,G₀/G₁期细胞占比明显增高。结论 汉防己甲素能够抑制SH-SY5Y细胞增殖并且诱导其发生凋亡。     

黄芪多糖对脂多糖诱导大鼠心肌细胞肥大的保护作用

目的 研究黄芪多糖对脂多糖（LPS）诱导的大鼠心肌细胞肥大的保护作用。方法 新生1～2 d的SD大鼠心肌细胞培养48 h后,设对照组,模型组,黄芪多糖低、中、高质量浓度（1、10、100 mg/L）组。计算机图像分析系统测量细胞体积;RT-PCR法检测心房利钠多肽（ANP）mRNA的表达;ELISA法检测细胞肿瘤坏死因子（TNF-α）的量;采用Fluo-3/Am荧光染色剂负载细胞,在激光共聚焦显微镜下测定细胞内钙离子浓度（[Ca²⁺]_i）的瞬间变化。结果 与对照组相比,LPS 1 mg/L可使心肌细胞体积显著增大,ANP mRNA的表达显著增强,细胞分泌TNF-α蛋白的量显著增加,心肌细胞内[Ca²⁺]_i瞬间峰值增大（P＜0.01）。与模型组相比,黄芪多糖1、10、100 mg/L预先给药均可抑制心肌细胞体积增大;细胞产生的TNF-α显著减少,ANP mRNA的表达不同程度地减少（P＜0.05）,其中10、100 mg/L组这两项指标可恢复到对照组的水平（P＞0.05）;黄芪多糖 10 mg/L可拮抗LPS对正常心肌细胞内[Ca²⁺]_i瞬间变化幅度增大的作用（P＜0.01）。结论 黄芪多糖对LPS诱导的乳鼠心肌细胞肥大有良好的保护作用,其机制可能与抑制TNF-α的产生、降低[Ca²⁺]_i有关。     

野西瓜挥发油抑制人胃癌 SGC-7901 细胞增殖的研究

目的 研究野西瓜挥发油的抗肿瘤作用。方法 采用 MTT 实验和 SRB 实验观察野西瓜挥发油对 SGC-7901 细胞的体外抗肿瘤作用;采用倒置荧光显微镜观察野西瓜挥发油作用后典型的细胞凋亡形态;采用流式细胞仪测定野西瓜挥发油对 SGC-7901 细胞凋亡及细胞周期的影响。结果 10～200 μg/mL 的野西瓜挥发油作用于 SGC-7901 细胞 72 h 后均可不同程度的抑制 SGC-7901 细胞的增殖,其 IC₅₀ 为 145.5 μg/mL,GI50 为 121.32 μg/mL,LC₅₀ 为 900.96 μg/mL,TGI 为 240.55 μg/mL;作用 24 h 后出现典型的凋亡形态;75、150、300 μg/mL 的野西瓜挥发油作用 24 h 时出现细胞凋亡;周期分布发生改变,呈现S期阻滞。结论 野西瓜挥发油具有明显抑制 SGC-7901 细胞增殖作用,其 SGC-7901 机制为诱导肿瘤细胞凋亡及改变细胞周期。     

芦荟大黄素对白细胞介素-2引起大鼠T细胞增殖和细胞内Ca2+浓度变化的影响

目的 研究芦荟大黄素对白细胞介素-2 (IL-2) 引起的 T 淋巴细胞增殖和细胞内 Ca²⁺浓度 (［Ca²⁺］_i) 变化的影响,探讨芦荟大黄素对淋巴细胞增殖的作用和机制。方法 采用 MTT 法检测细胞增殖,用单细胞钙成像系统记录细胞胞浆［Ca²⁺］_i。结果 芦荟大黄素对 IL-2 引起的 T 细胞增殖有显著抑制作用,且抑制效果与剂量有关;IL-2 引起［Ca²⁺］_i 升高,并持续维持高 ［Ca²⁺］_i 水平,引起 ［Ca²⁺］_i 升高的机制包括胞内 Ca²⁺ 释放和胞外 Ca²⁺ 内流;芦荟大黄素显著抑制 IL-2 引起的 ［Ca²⁺］_i 升高,作用途径包括抑制胞内 Ca²⁺ 释放和胞外 Ca²⁺ 内流。结论 芦荟大黄素对 IL-2 诱发的 T 细胞增殖有显著的抑制作用,其作用机制可能与抑制细胞内 ［Ca²⁺］_i 升高相关。     

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.     

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.     

Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine

A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care（~＇4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.