外源性ANF基因在人血管平滑肌肉瘤细胞中的表达

对体外传代培养的人血管起源平滑肌肉瘤细胞进行直接和脂质体Ｔｆｘ－５０包裹的人心钠素（ＡＮＦ）基因表达质粒ｐｃＤＡＮ３／ＡＮＦ转染，并以非同位素地高辛标记的ＲＮＡ分子探针，对转染细胞中的ＡＮＦｍＲＮＡ水平进行ＲＮＡＤｏｔＢｌｏｔ分子杂交检测；同时，利用...     

携带HuIFN－β cDNA的重组逆转录病毒载体的构建及在人肝癌细胞中的特异表达

目的：研究逆转录病毒介导干扰素基因转移及在肝癌细胞中特异表达作用。方法：将人β干扰素（ＨｕＩＦＮ－β）ｃＤＮＡ克隆到逆转录病毒载体ＰＬ位点，分别构建了转录受ＳＶ４０启动子驱动的载体ＭＮＳＩＦＮＢ和转录受人甲胎蛋白增强子（ＡＦＰｅ）调控的载体ＭＮＡＩＦＮＢ。用脂质体转染法将载体分别转导ＰＡ３１７包装细胞，质粒转染率为每１０５ＰＡ３１７细胞（４～２５）×１０３ＣＦＵ／μｇ，病毒感染率（４．５～５００）×１０４ＣＦＵ／ｍｌ。重组病毒在４μｇ／ｍｌｐｏｌｙｂｒｅｎｅ存在条件下感染人肝癌、肾癌及黑色素瘤细胞。结果：ＮｅｏＲ克隆ＲＮＡ斑点杂交及ＩＦＮ活性分析证明，人ＡＦＰｅ可促进异源启动子启动ＨｕＩＦＮ－β基因在合成ＡＦＰ的人肝癌细胞中高效特异转录和表达。结论：ＡＦＰ＂持家基因＂顺式调控序列在合成ＡＦＰ的肝癌细胞中特异驱动ＩＦＮ－β基因表达，该研究为肝癌特异性免疫基因治疗提供了资料。     

Fas基因在卵巢癌细胞凋亡中的作用

目的：检测Ｆａｓ基因表达并观察转染Ｆａｓ基因对卵巢癌细胞凋亡的影响,探讨其在卵巢癌发生、发展中的作用。方法：经流式细胞术、ＲＴ－ＰＣＲ方法检测６种卵巢癌细胞Ｆａｓ的表达水平。构建ｐｃＤＮＡ３－Ｆａｓ真核表达载体。经脂质体转染细胞,通过流式细胞仪检测Ｆａｓ基因表达变化。应用ＰＩ染色经流式细胞术检测观察转染Ｆａｓ基因对３ＡＯ细胞凋亡的影响。结果：６种卵巢癌细胞均表达Ｆａｓ均属中低表达,经ｐｃＤＮＡ３－     

细胞间粘附分子—1反义DNA体外对内皮细胞细胞间粘附分子—1？…

目的：研究细胞间粘附分子－１（ＩＣＡＭ－１）的 ＤＮＡ对内皮细胞ＩＣＡＭ－１表达的抑制作用。方法：构建ＩＣＡＭ－１反义ＤＮＡ载体,用脂质体转染内皮细胞,ＴＮＦα刺激后,流式细胞术检测转染细胞表面ＩＣＡＭ－１蛋白的表达。结果：酶切鉴定证明,１．４ｋｂ的ＩＣＡＭ－１ＤＮＡ片段后向连接到ｐｃＤＮＡ３表达载体,;流式细胞术检测显示,正常细胞加ＴＮＦα刺激后,表面ＩＣＡＭ－１表达明显升高,转洒细胞加ＴＮＦα     

人白细胞介素2、β干扰素基因逆转录病毒载体的构建和在人肾细胞癌及其TIL中的表达

从ｐｃＤ－５．１质粒和ｐＳＰＧＮＨＩＦＮＢ１０质粒分别切下人白细胞介素２（ＨｕＩＬ－２）ｃＤＮＡ和人β干扰素（ＨｕＩＦＮ－β）ｃＤＮＡ，分别克隆到ｐＮＭＳＭ逆转录病毒载体多克隆位点，经酶切鉴定确定正确插入方向。经ＰＡ３１７包装细胞包装成重组病毒，测转染效率。用ＮＩＨ／３Ｔ３细胞测重组病毒感染效率。在８μｇ／ｍｌ鱼精蛋白存在的条件下分别感染人新鲜肾透明细胞癌体外建株细胞以及人肾细胞癌肿瘤浸润性淋巴细胞（ＴＩＬ）。经Ｇ４１８选择阳性克隆后测上清表达ＨｕＩＬ－２及ＨｕＩＦＮ－β活性。结果ＨｕＩＬ－２和ＨｕＩＦＮ分别在转ＨｕＩＬ－２基因和ＨｕＩＦＮ－β基因肾细胞癌细胞的表达量达２５０Ｕ／１０６细胞·ｄ－１和６４００Ｕ／１０６细胞·ｄ－１，在经目的基因转染ＴＩＬ细胞中的表达量分别比未经目的基因转染的ＴＩＬ高２～３倍和４～８倍。ＴＩＬ生长状况未有明显改变，抗肿瘤活性未见明显增强。     

低分子RNA及5—Fu对白血病细胞系K562细胞抑制作用的实验观察

目的：观察低分子ＲＮＡ及５－Ｆｕ在白血病细胞系Ｋ５６２细胞中的作用。方法：在Ｋ５６２细胞培养中加低分子（实验组１）、５－Ｆｕ（实验组２）、低分子ＲＮＡ和５－Ｆｕ（实验组３）及Ｐ．Ｂ．Ｓ（对照组）,观察集落细胞数,死、活细胞计数及细胞蛋白含量。结果：集落细胞数对照组为１４２个,实验组１为７０个,抑制率为５０．７％,实验组２为７１个,抑制率为５０．５％,实验组３为４１个,抑制率为７１．１％;活、死细胞     

脂质体介导的融合基因pCEAcd／tk转染肺癌细胞侏效率的 …

目的：对脂质体介导的体外肺癌细胞ＤＮＡ转效率的差异性进行研究。方法：撮质料ｐＣＥＡｃｄ／ｔｋ,脂质体包裹后转染６种肺癌细胞株,Ｇ４１８筛选,计数细胞阳性春隆数。结果：６种肺癌细胞株中,导入了ｐＣＥＡｃｅｔ／ｔｋ并获得稳定表达的细胞阳性克隆数差异较大;脂质体ＥＳＣＯＲＴ－ＤＮＡ混合物与细胞孵育时间不同对转染效率也有一定的影响。结论：脂质体介导的方法把融合自杀基因纽入到肺癌细胞的效率存在细胞差异性。     

重组融合蛋白Fab/IFN-αA体外抗HBV作用的实验研究

目的 在体外细胞水平上观察重组融合蛋白（Ｆａｂ／ＩＦＮ－αＡ）对乙型肝为病毒（ＨＢＶ）基因表达的抑制作用。方法 应用ＨＢＶ ＤＮＡ转染细胞系（ＨｅｐＧ２．２．１５细胞）作模型,通过固相放射免疫方法检测Ｆａｂ／ＩＮＦ－αＡ作用后细胞上清液的ＨＢｓＡｇ、ＨＢｅＡｇ水平的变化,结合细胞存活率来评价其抗ＨＢＶ作用,并与α－干扰素（ＩＦＮ－αＡ）进行比较。结果 经１２ｄ作用,Ｆａｂ／ＩＮＦ－αＡ在细胞存活率     

大鼠GDNF真核表达载体的构建及其真在核细胞中的表达

目的：构建ｐｃＤＮＡ３／ＧＤＮＦ真核表达质粒并了解其在真核细胞内的表达．方法：将ＧＤＮＦ逆转录聚合酶链式反应产物克隆至ｐｃＤＮＡ３真核表达载体上,经酶切鉴定及测序分析并以脂质体介导法转染真核细胞,了解其在细胞内的表达及其表达蛋白的生物学活性．结果：酶切鉴定及测序分析表明重组ｐｃＤＮＡ３／ＧＤＮＦ表达质粒克隆成功,转染实验表明重组质粒能在真核动物细胞中表达出具有活性的ＧＤＮＦ蛋白．结论：以脂质体介导     

人白细胞介素2,β干扰素基因逆转录病毒载体的构建和在人…

从ｐｃＤ－５．１质粒和ｐＳＰＧＮＨＩＦＮＢ１０质粒分别切下人白细胞介素２（ＨｕＩＬ－２）ｃＤＮＡ和人β干扰素（ＨｕＩＦＮ－β）ｃＤＮＡ，分别克隆到ｐＮＭＳＭ逆转录病毒载体多克隆位点，经酶切鉴定确定正确插入方向。经ＰＡ３１７包装细胞包装成重组病毒，测转染效率。用ＮＩＨ／３Ｔ３细胞测重组病毒感染效率。在８μｇ／ｍｌ鱼精蛋白存在的条件下分别感染人新鲜肾透明细胞癌体外建株细胞以及人肾细胞癌肿瘤浸润性淋巴细     

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.