重组EBV-TK及DNase检测鼻咽癌血清相应抗体的比较研究

[目的]比较鼻咽癌(NPC)患者血清中EB病毒(EBV)胸苷激酶(TK)和DNA酶(DNase)抗体水平.[方法]用鼻咽癌血清中和Raji细胞产生的EBV DNase,抗酶率(AER)≥30%为EBV DNase抗体(EDAb)阳性.以大肠杆菌表达的重组EBV TK为抗原,用Western blot方法检测鼻咽癌血清中的EBV TK抗体(ETAb),显现棕褐色条带者为ETAb阳性.[结果]55例鼻咽癌患者血清,EDAb阳性率94.5%,ETAb阳性率89.1%,EDAb+/ETAb+、EDAb-/ETAb+、EDAb+/ETAb-、EDAb-/ETAb-的检出率分别为87.3%、1.8%、7.3%和3.6%,同时检测此两项指标可使EBV相关抗原抗体的阳性率提高至96.4%.[结论]大多数鼻咽癌血清均同时具有EDAb和ETAb,检测这两个酶的抗体是鼻咽癌临床辅助诊断的二个重要血清学指标,联合应用意义更大.     

人Lipocalin前列腺素D合酶的克隆表达及其抗体制备

目的 研究Lipocalin型前列腺素D合酶（L－PGDS）的编码蛋白质在大肠杆菌中的表达,进一步制备抗L－PGDS编码蛋白质的多克隆抗体。方法 用逆转录多聚酶链式反应（RT－PCR）方法克隆L－PGDS基因蛋白编码序列。构建该基因的表达质粒,在大肠杆菌中诱导表达,SDS－PAGE分析表达的蛋白质。用RediPack GST亲和层析柱纯化的蛋白质免疫BALB／c小鼠制备多抗。结果 RT－PCR所分离的L－PGDS基因蛋白编码序列,经测序证明与基因库所报道的L－PGDS的基因序列完全一致。SDS－PAGE分析证实该基因编码的蛋白质在大肠杆菌中表达,并获得效价为1：6400的多克隆抗体。结论 L－PGDS基因编码蛋白质能够在原核细胞中表达,并能获得抗L－PGDS基因编码蛋白质的多克隆抗体,为进一步深入研究该蛋白质的结构与功能打下了基础。     

融合蛋白弓形虫主要表面抗原P30-CTXA2/B在大肠杆菌中的表达

目的 :克隆并表达含有刚地弓形虫主要表面抗原P30及霍乱毒素A2 /B亚基基因的原核表达载体 ,为弓形虫疫苗的研究奠定基础。方法 :通过PCR方法扩增出P30基因片段 ,将其克隆入含有霍乱毒素A2 /B亚基基因的表达质粒pUAB0 2 4 ,在大肠杆菌JM10 9(DE3)中表达融合蛋白。行SDS PAGE电泳及West ernblotting检测鉴定。结果 :酶切电泳证明质粒构建正确。SDS PAGE显示IPTG诱导可以产生特异性条带。Westernblotting进一步证实该条带为p30 CTA2 /B融合蛋白。结论 :成功构建的表达载体pUAB0 2 4 p30可有效表达特异性的融合抗原蛋白P30 CTA2 /B。     

鼻咽癌患者放疗前后血清EB病毒特异性DNA酶抗体的变化

目的：了解鼻咽癌（NPC）患者放疗前后血清EB病毒特异性DNA酶（EBV－DNase)抗体的变化,以评估其预后。方法：用WesternBlot及放射免疫法检测24例NPC患者放疗前后BV－DNase抗体,并用免疫酶法测定血清EB病毒壳抗原IgA(EBVCA-IgA）。结果：（1）WesternBlot法检测NPC患者放疗前后血清EBV－DNaes抗体,放疗前抗体阳性率87．50％（21／24）,放疗后为29．16％（7／24）,差异显著（P＜0．01）;（2）放免法测得两组血清抗酶率（AER）平均值分别为74．02％、31．75％,二者有显著差异（P＜0．05）。（3）放疗后的血清EBVCA－IgA平均几何滴度（GMT）为1：23．4,较放疗前明显降低（P＜0．05）。结论：PNC放疗后血清EBV－DNase抗体水平有明显下降,比EBVCA－IgA检测更加准确地反映了病情变化。提示血清EBV－DNase抗体检测对评估NPC预后,疗效监测可能有帮助。     

反义寡核苷酸抑制survivin表达来增强乳腺癌细胞株MCF-7和MDA-MB-231对多西他赛敏感性的研究

目的: 探讨利用反义寡核甘酸(ASODN)技术封闭乳腺癌细胞株survivin基因,观察survivin基因表达下调能否诱导细胞凋亡及增强对多西他赛(docetaxel)药物敏感性.方法: Survivin ASODN单独及联合多西他赛处理乳腺癌细胞株MCF-7和MDA-MB-231,RT-PCR检测survivin mRNA的表达,免疫细胞化学方法和Western blotting检测survivin蛋白表达,倒置显微镜观察细胞形态变化,MTT法检测细胞的生长抑制率.结果: Survivin ASODN可下调人乳腺癌细胞株中survivin mRNA 和蛋白质的表达;survivin ASODN 与多西他赛联合用药组相比对照组和多西他赛组可明显抑制细胞株的生长(P<0.01).结论: Survivin ASODN明显抑制survivin基因在乳腺癌细胞株MCF-7和MDA-MB-231中的转录及翻译,明显提高乳腺癌对多西他赛的敏感性.     

重组L-蛋氨酸γ-裂解酶基因原核表达载体构建及初步鉴定（摘要）

目的构建原核表达载体,筛选高表达克隆,提取蛋氨酸酶蛋白,为深入研究蛋氨酸酶体内外抗肿瘤作用做前期准备．方法化学法合成METase基因,将所得基因插入原核表达载体PGEX-4T-1,得到重组质粒并转化人大肠杆菌．通过蛋氨酸诱导筛选高表达克隆．用SDS—PAGE初步检测蛋白．结果重组质粒经PCR检测、酶切、测序证实与预期一致．重组的质粒在蛋氨酸的诱导下表达大量的蛋氨酸酶,并经SDS—PAGE检测,表达产物的分子量同预期结果相符．     

SARS冠状病毒核衣壳蛋白的重组表达及其单克隆抗体的制备

目的:表达SARS冠状病毒核衣壳蛋白(N蛋白),并以表达产物为免疫原制备特异性单克隆抗体(mAb).方法:采用RT PCR方法,从灭活的病毒抗原标本中扩增编码N蛋白的基因.测序确认后,再亚克隆至原核表达载体中.从SDS PAGE凝胶中 回收原核表达产物后免疫BALB/c小鼠,经融合、筛选制备特异性mAb.结果:从标本中扩增出1269bp的DNA,测序结果证实 为N蛋白基因.将该基因克隆至原核表达载体中后,在大肠杆菌中获得了较好的表达.表达产物经SDS PAGE后,在Mr约为 43000处可见1条明显的诱导表达带.Westernblot的结果表明,该电泳带与SARS患者的恢复期血清呈特异的免疫反应.从 SDS PAGE凝胶中回收表达产物并免疫BALB/c小鼠,制备出3株抗N蛋白的mAb.这些mAb与SDS PAGE凝胶上Mr约为 43000的蛋白带也呈现很强的免疫反应.结论:所获的重组N蛋白及特异性mAb,将为进一步建立SARS病毒感染早期诊断的 方法奠定了基础.     

广州管圆线虫GAMMA-BBH基因的克隆表达鉴定和荧光定量检测

目的亚克隆和表达广州管圆线虫γ-丁基甜菜碱羟化酶（γ-butyrobetaine hydroxylase,GAMMA-BBH）基因．对该蛋白属性进行鉴定,定量检测不同虫龄该目的基因表达量。方法PCR扩增GAMMA—BBH cDNA基因．产物经Nco Ⅰ和HindⅢ限制性内切酶酶切后连接至原核表达载体重组为pET—BBH,在B121（DE3）中用IPTG诱导表达．SDS—PAGE、Westernblot和酶活性测定鉴定表达产物,用荧光定量PCR方法检测广州管圆线虫不同虫龄GAMMA—BBH的表达量。结果PCR和核苷酸序列测定结果表明pET—BBH构建正确并能在IPTG诱导下表达,SDS—PAGE和Western blot鉴定表明表达产物分子量与预期分子量（Mr=48500）一致,酶学测定显示表达产物有GAMMA—BBH的酶活性,荧光定量PCR方法检测结果显示GAMMA—BBH在虫体不同虫龄期表达量不一致。结论目的基因能正确编码并表达具有酶活性的GAMMA—BBH,该酶的表达量与虫龄和寄生部位可能有关。     

VD_3结合蛋白的分离纯化

目的 :纯化VD3 结合蛋白 (DBP)。方法 :利用DBP的相对分子质量及电荷性质 ,分别用阳离子交换剂、阴离子交换剂和凝胶过滤等分离目的蛋白 ,SDS PAGE鉴定纯度 ,并进行活性分析。结果 :分离到相对分子质量为 5 80 0 0的蛋白质 ,SDS PAGE呈单一区带。结论 :成功分离纯化出DBP。     

Effects of heat shock protein-antigen peptide complexes (HACs) in melanoma B16 cell line on transplanted tumor development in mice

目的 :建立黑色素瘤 B16细胞热休克蛋白 -抗原肽复合物 (HACs)的制备方法并测其抑瘤效应。方法 :应用 Sephacryl S- 2 0 0凝胶过滤制备 HAC粗提物 ,应用 SDS- PAGE纯化 HACs,并测其抑瘤效应。结果 :应用 SDS- PAGE纯化的 HAC6 0、 HAC75和 HAC97不同程度地降低肿瘤发生率 ,延迟肿瘤发生时间和减慢肿瘤生长速度。结论 :6 0 0 0 0～ 970 0 0 HACs具有抑制瘤作用     

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.