白细胞介素—2的基因克隆及其在啤酒酵母细胞中的表达

用ＰＣＲ方法从白细胞介素－２（ＩＬ－２）ｃＤＮＡ全序列中扩增成熟肽基因片段，酵母中间载体ＰＳＫ４３ＳＢ融合后，重组于酵母游离型表达载体ＹＥＰＨＣ８，获得了高效表达，并对其糖基化进行了研究。     

一种通用型重组2型腺伴随病毒载体的构建及外源基因表…

以野生型２型人腺伴随病毒（ＡＡＶ－２）基因组载体ｐＳＳＶ９－ｉｎｔ＾－为基础，构建了一种携带和表达真核基因的基础ＡＡＶ载体ｐＳＳＶ９／ＭｕｌＶ－ｎｅｏｓｖ，表达了ｎｅｏ基因，并采用该载体组建了携带人白细胞介素－２ｃＤＮＡ的重组ＡＡＶ载体ｐＳＳＶ９／ＭｕｌＶ－ｎｅｏｓｖ－ＩＬ２，转染Ａ５４９细胞后表达了人白细胞介素－２基因。为应用腺伴随病毒作基国治疗研究提供了实验基础。     

人类bcl—2蛋白在CHOdhfr^—细胞中的表达

目的：建立表达人类ｂｃｌ－２蛋白的哺乳类细胞模型，为探讨ｂｃｌ－２的作用机制及其与其它基因间的关系奠定基础。方法：通过将９１０ｂｐ的含有完整开放阅读框的人类ｂｃｌ－２ ｃＤＮＡ以正向克隆逆转录病毒载体ｐＬＸＳＮ的ＥｃｏＲＩ位点而构建重组真核表达载体ｐＬＸＳＮ／ｓ－ｂｃｌ－２。利用电穿孔技术将ｐＬＸＳＮ／ｓ－ｂｃｌ２转染于ＣＨＯｄｈｆｒ＾－细胞，筛选＋出Ｇ４１８抗性克隆，经免疫印迹检测人类ｂｃｌ－２     

T载体克隆乙肝病毒preS2＋S基因的实验研究

将商品化真核表达载体ｐｃＤＮＡ３改造成Ｔ载体ｐｃＤＮＡ３－Ｔ，燕运用ｐｃＤＮＡ３－Ｔ直接克隆也由ＰＣＲ扩增的ａｄｗ２亚型乙肝病毒ｐｒｅＳ２与Ｓ基因；结果：ｐｃＤＮ３－Ｔ与ＰＣＲ产物的重组率高达７０％。提示：该方法具有简便，省时等特点。     

人脑源性神经营养因子cDNA克隆及在酵母中的表达

目的：克隆和表达人脑源性神经营养因子（ｈＢＤＮＦ）。方法和结果：从原代培养人雪旺细胞中提取总ＲＮＡ，用ＲＴ－ＰＣＲ法获取了编码带前导肽的和成熟的ｈＢＤＮＦ２个ｃＤＮＡ片段，经ＤＮＡ测序表明其顺序与文献报道一致。将这２个ｃＤＮＡ片段分别插入到大肠－酵母穿梭质粒ｐＶＴ１０２Ｕ／α上。用酵母整体细胞法将重组质粒转化酵母宿主细胞，经筛选后，获得分泌性表达。表达产物经ＳＤＳ－ＰＡＧＥ电泳鉴定，大小都在１５０     

大鼠肝氨甲酰磷酸合成酶I基因在非肝细胞中的表达

氨甲酰磷酸合成酶Ｉ（ＣＰＳＩ）ｃＤＮＡ全序列基因片段与ｐＳＶ２载体的重组及重组质粒ｐＳＶ２－ＣＰＳｃｆ在７４０２人肝癌细胞、ＣＨＯ细胞和ＮＩＨ／３Ｔ３细胞中的表达结果表明，ｐＳＶ２－ＣＰＳｃｆ转染的以上３株细胞均可稳定、高效地表达ＣＰＳＩ。通过核Ｒｕｎ－ｏｆｆ转录活性的检测和Ｎｏｒｔｈｅｒｎ杂交证实，表达的ＣＰＳＩ转录产物结构完整。提示ＣＰＳＩ肝组织特异表达主要与转录改变有关。     

sPLA2cDNA表达载体的选择和亚克隆

目的：选择适当的载体，启动Ｃａ＾２＋依赖分泌型磷脂酶Ａ２（ｓＰＬＡ２）ｃＤＮＡ的表达，为进一步研究各种因素对该酶活性的影响奠定基础。方法：首先从ｓＰＬＡ２－ｐＧＥＭ７重组体（这一重组体不能在转染的真核细胞中表达）获得人ｓＰＬＡ２ｃＤＮＡ，克隆该片断进入中间载体ＢＳＳＫ（使ｓＰＬＡ２ｃＤＮＡ两端出现ＸｂａＩ、Ｈｉｎｄ３酶切位点），选择ａｎｔｉｓｅｎｓｅ ｓＰＬＡ２－ＢＳＳＫ重组体进行扩增，双酶消化上     

SRS淋巴瘤株癌基因表达筛选研究

研究ＳＲＳ鼠白血病／淋巴瘤克隆株（包括ＳＲＳ－８２亲系和ＳＡＣ－ＩＩＢ２，ＳＡＣ－ＩＩＣ３克隆株）癌基因和癌基因蛋白的表达，筛选比克隆株的癌基因表达谱型，为ＳＲＳ淋巴瘤株的实验性反义核酸治疗提供目标，用ＡＢＣ免疫组织化学方法筛选ＳＲＳ－ＩＩＢ２，ＳＡＣ－ＩＩＣ３克隆株癌基因表达谱型，在ＳＲＳ克隆株中呈强表达的有ｃ－ｆｏｓ和ｃ－ｍｙｃ，ｃ－ｊｕｎ，ｒａｓ－ｐ２１和ｃ－ｅｒｂＢ－２呈中度表达，Ｐ５３和     

重组人β—防御素基因在COS—7细胞的转染表达

为探索建立持续稳定表达ｈＢＤ－２的哺乳类动物工程细胞的可能性,作者研究构建真核重组表达载体ｐＣＭＶ．ｔａｇ２Ｂ／ｈＢＣ－２以进行ＣＯＳ－７细胞转染表达实验。将本室克隆获得的ｈＢＤ－２全长ｃＤＮＡ片段插入带有报告基因的真核表达质粒ｐＣＭＶ．ｔａｇ２Ｂ构建出ｈＢＤ－２的重组表达载体ｐＣＭＶ．ｔａｇ２Ｂ／ｈＢＤ－２,并经ＤＮＡ测序证明ｈＢＤ－２ｃＤＮＡ片段的插入方向和其全长ｃＤＮＡ的碱基组成顺序均准确无误。通过脂质体转染法将ｐＣＭＶ．ｔａｇ２Ｂ／ｈＢＤ－２导入ＣＯＳ－７细胞。ＲＴ－ＰＣＲ法和免疫印迹法分别从ｍＲＮＡ水平和蛋白质水平检测到被转染的ＣＯＳ－７细胞系能有效表达ｈＢＤ－２。     

人白细胞介素2基因转移表达及抗乙型肝炎病毒和诱导LAK细胞活性的研究

为了探讨白细胞介素（ＩＬ）－２转基因表达抗乙型肝炎病毒（ＨＢＶ）的作用，应用逆转录病毒载体ｐＺＩＰＳｖ（Ｘ）－包装细胞系ＰＡ３１７基因转移系统，研究了人ＩＬ－２ｃＤＮＡ转移和表达，以及抗ＨＢＶ和诱导淋巴因子激活的杀伤细胞（ＬＡＫ细胞）的作用。所构建的人ＩＬ－２重组表达载体ｐＺＩＰｈｕＩＬ－２，以ＤＮＡ－磷酸钙共沉淀技术转染ＰＡ３１７细胞，筛选到Ｇ４１８抗性克隆，分泌假病毒颗粒达１０６ＣＦＵ／ｍｌ。以假病毒颗粒感染２．２．１５细胞系及正常人外周血单个核细胞，分泌ＩＬ－２水平可达６ＩＵ／ｍｌ，明显抑制２．２．１５细胞ＨＢｓＡｇ的分泌表达，与１００ＩＵ／ｍｌ重组的ＩＬ－２一样可诱导出相似的ＬＡＫ细胞活性。而不含ＩＬ－２ｃＤＮＡ的ｐＺＩＰＳＶ（Ｘ）的假病毒颗粒则无此作用。提示逆转录病毒载体。包装细胞系可以成功地实现人ＩＬ－２ｃＤＮＡ的转移和低水平的分泌和表达，并可明显抑制２．２．１５细胞分泌ＨＢｓＡｇ及诱导ＬＡＫ细胞活性。     

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.