恒河猴高重复顺序DNA的分子克隆(摘要)

哺乳动物基因组中高重复顺序可用限制性内切酶消化DNA经用电泳分离获得,本文用限制性内切酶BamHI消化恒河猴DNA分离得到一系列高重复片段。用其中最小片段与质粒pBR322共价连接,转化到大肠杆菌后得到3个带有重组子的克隆.其中PMBI克隆用BamHI,Pstl酶解,杂交鉴定,证明此克隆是含有重组的恒河猴高重复片段,此片段大小约为340碱基对.     

由pBR322缺失重组构建的一个小质粒的结构特征

我们在构建昆虫杆状病毒转移载体的过程中,发现了一个小质粒pQS145,其长2.0 kb,拷贝数很高,有EcoR I、Pst Ⅰ单一位点和3个Hinf Ⅰ位点,有抗氨苄青霉素基因,能与pBR 322探针杂交。用双酶消化法构建了此质粒3个酶的物理图谱。pQS 145是由pBR322缺失重组而来,实验结果与推导结果完全一致。     

EcoRI限制及修饰酶基因的克隆和高效表达研究(简报)

限制性内切酶是进行基因分析和DNA重组不可少的工具。EcoRI是其中最常用的酶之一.本文简述了利用重组DNA技术克隆EcoRI的限制和修饰酶基因及其高效表达的研究结果. 据文献报导,EcoRI的限制和修饰酶基因定位于质粒DNA上.我们从酶的生产菌株E.coli~5RY13中纯化了一种分子量约为9kb(千硷基对)的质粒DNA,并藉PvuⅡ和BstNI联合酶解,分得一含限制和修饰酶基因的片段(～2.2kb)。片段用Klenow酶补齐末端后,经平端连接插入pBR32     

携带人TGF-β1腺病毒载体的构建及鉴定

目的构建携带人转化生长因子β1(hTGF-β1)的腺病毒载体(Adeno-hTGF-β1),为hTGF-β1基因转染骨髓间质干细胞(BMSCs)的研究奠定基础。方法应用基因重组技术构建hTGF-β1腺病毒表达载体,分别用限制性内切酶酶切和聚合酶链反应(PCR)鉴定,并通过脂质体Fugene 6介导腺病毒DNA转染293细胞。结果重组hTGF-β1腺病毒DNA经限制性内切酶XhoⅠ酶切后,得到14.5、8.1、4.2、4.0、2.5、1.4、0.6 kb片段。与空白腺病毒相比,5.6 kb的片段已被置换成4.2 kb和4.0 kb片段;经PI-SceⅠ/I-CeuⅠ双酶切后,得到32.6 kb和2.6 kb含目的基因片段,片段大小无误,表明重组Adeno-hTGF-β1腺病毒表达系统构建成功。以重组Adeno-hTGF-β1DNA为模板的PCR产物中出现1.35 kb hTGF-β1目的基因片段,表明hTGF-β1基因成功连接至adeno-X腺病毒表达载体中。重组hTGF-β1腺病毒表达载体通过Fugene 6介导转染293包装细胞出现细胞病变效应(CPE)。采用PCR反应鉴定293细胞包装的腺病毒,证实扩增出247 bp的hTGF-β1目的基因片断和312 bp的腺病毒骨架基因片断。结论携带人hTGF-β1的腺病毒载体的构建成功,并能在293细胞包装,为hTGF-β1基因转染的BMSCs在软骨组织工程中的应用奠定了基础。     

携带人TGF-β1腺病毒载体的构建及鉴定

目的 构建携带人转化生长因子β1(hTGF-β1)的腺病毒载体(Adeno-hTGF-β1),为hTGF-β1基因转染骨髓间质干细胞(BMSCs)的研究奠定基础.方法 应用基因重组技术构建hTGF-β1腺病毒表达载体,分别用限制性内切酶酶切和聚合酶链反应(PCR)鉴定,并通过脂质体Fugene 6介导腺病毒DNA转染293细胞.结果 重组hTGF-β1腺病毒DNA经限制性内切酶XhoⅠ酶切后,得到14.5、8.1、4.2、4.0、2.5、1.4、0.6 kb片段.与空白腺病毒相比,5.6 kb的片段已被置换成4.2 kb和4.0 kb片段;经PI-SceⅠ/I-CeuⅠ双酶切后,得到32.6 kb和2.6 kb含目的基因片段,片段大小无误,表明重组Adeno-hTGF-β1腺病毒表达系统构建成功.以重组Adeno-hTGF-β1DNA为模板的PCR产物中出现1.35 kb hTGF-β1目的基因片段,表明hTGF-β1基因成功连接至adeno-X腺病毒表达载体中.重组hTGF-β1腺病毒表达载体通过Fugene 6 介导转染293 包装细胞出现细胞病变效应(CPE).采用PCR反应鉴定293细胞包装的腺病毒,证实扩增出247 bp的hTGF-β1目的基因片断和312 bp的腺病毒骨架基因片断.结论 携带人hTGF-β1的腺病毒载体的构建成功,并能在293细胞包装,为hTGF-β1基因转染的BMSCs在软骨组织工程中的应用奠定了基础.     

人TAT-Survivin融合蛋白原核表达载体的构建

目的:构建人TAT-Survivin融合蛋白原核表达载体。方法:以人胸腺细胞瘤cDNA为模板,采用RT-PCR扩增survivin基因成熟蛋白编码的全部序列,克隆入原核表达载体pET28a(+)中,经限制性内切酶双酶切及DNA序列分析鉴定目的基因。结果:PCR扩增的特异性片段长度为462bp,以此构建的重组质粒pET28a-TAT-survivin,经HindIII和BamHI双酶切后显示5.9kb和462bp左右的两条片段,测序结果与Genbank中的人survivin基因cDNA(Genbank序列号)序列一致。证明人survivin已成功克隆到了原核细胞表达载体pET28a(+)中。结论:成功构建了pET28a-TAT-survivin重组原核表达载体。     

辐射敏感性新基因UHRF1真核表达载体的构建及鉴定

目的构建UHRF1的真核表达载体,并验证其在乳腺癌细胞MDA-MB-231中的表达。方法采用RT-PCR方法,从乳腺癌细胞MCF-7的总cDNA中扩增出2.3kb的UHRF1基因的cDNA片段,经限制性内切酶KpnⅠ与XhoⅠ双酶切,定向克隆到真核表达载体pcDNA3中,构建重组质粒pcDNA3（＋）-UHRF1,利用限制性内切酶双酶切分析和DNA序列分析鉴定重组质粒;构建成功的重组质粒,经脂质体Lipofactamin2000介导转染MDA-MB-231细胞,G418筛选阳性克隆,以RT-PCR和Western blot检测UHRF1的mRNA和蛋白的表达。结果获得全长约为2.3kb的UHRF1基因片段;重组质粒经限制性内切酶XhoⅠ和KpnⅠ酶切、电泳后显示2.3kb的UHRF1目的片段和5.4kb的pcDNA3载体片段,即UHRF1基因的cDNA已正确克隆到真核细胞表达载体pcDNA3中;UHRF1转染乳腺癌MDA-MB-231细胞后的RT-PCR和Western blot的结果显示：UHRF1的mRNA和蛋白水平均呈现高表达。结论成功构建UHRF1基因的真核表达载体,为进一步研究该基因的功能奠定基础。     

人TAT-PDX-1融合蛋白原核表达载体的构建

目的构建人TAT-PDX-1融合蛋白原核表达载体。方法以人胰腺癌(PANC)-1细胞株cDNA为模板,采用反转录聚合酶链式反应(RT-PCR)扩增胰腺十二指肠同源异型盒基因-1(PDX-1)蛋白编码的全部序列,克隆入原核表达载体pET28a中,经限制性内切酶HindIII和BamHI双酶切及DNA序列分析重组质粒的目的基因。结果 RT-PCR扩增产物的特异性片段长度为885 bp,以此构建的重组质粒pET28a-TAT-PDX-1经HindIII和BamHI双酶切后显示5 900 bp和885 bp左右的2条片段,测序结果与Genbank中的人PDX-1基因cDNA序列一致。结论成功构建了人TAT-PDX-1融合蛋白原核表达载体。     

人TAT—Survivin融合蛋白原核表达载体的构建

目的：构建人TAT—Survivin融合蛋白原核表达载体。方法：以人胸腺细胞瘤cDNA为模板,采用RT--PCR扩增survivin基因成熟蛋白编码的全部序列,克隆入原核表达载体pET28a（＋）中,经限制性内切酶双酶切及DNA序列分析鉴定目的基因。结果：PCR扩增的特异性片段长度为462bp,以此构建的重组质粒pET28a—TAT—survivin,经HindIII和BamHI双酶切后显示5．9kb和462bp左右的两条片段,测序结果与Genbank中的人survivin基因cDNA（Genbank序列号）序列一致。证明人survivin已成功克隆到了原核细胞表达载体pET28a（＋）中。结论：成功构建了pET28a—TAT—survivin重组原核表达载体。     

异种移植转基因用含粘附分子-2启动子的人CD59 重组基因的构建

目的：构建含人粘附分子－2（ICAM－2）启动子的人补体调节蛋白CD59重组基因,并钭其用于异种器官移植转基因。方法：利用PCR方法从人血基因组扩增得到ICAM－2启动子、CD59基因的第一内含子片段,经电泳分离、切胶回收纯化得到上述片段,分别双酶、单酶切这两条片段,纯化回收备用;双酶切pcDNA3-CD59真核表达载体,经电泳分离,切胶回收纯化得到不含病毒启动子、含筛选基因Neo的一段pcDNA3-CD59cDNA作为载体序列;ICAM－2启动子片段先与载体进行定向克隆连接反应后转化细菌,阳性转化蓖质粒抽提及酶切鉴定,得到pcDNA3-ICAM2-CD59质粒;再单酶切此质粒,纯化该载体与CD59第一内含子片段连接,转化细菌、抽提质粒,用脂质体将该质粒转染猪血管内皮细菌,流式细胞仪检测CD59蛋白表达。结果：得到pcDNA3-Enhancer-ICAM2-CD59质粒,以EcoR I消化此重组质粒,产生5．5及0．5kb两片段,以Hind Ⅲ消化重组质粒,得到5．45及0．55kb两片段,以Kpn I/Hind Ⅲ双酶切质粒时,出现5．0、0．55、0．4kb 3条片段,对插入子分别进行测序,上述结果完全符合设计要求及正确序列。流式细胞仪检测重组基因表达阳性。结论：含人ICAM－2启动子的CD59重组基因表达载体获得成功,该重组基因构建成功为转基因应用奠定了基础。     

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.     

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.     

Electro-Acupuncture Combined with the Trigger Point Needle-Embedding for Treatment of Primary Trigeminal Neuralgia in 31 Cases

In recent years, the author of this essay has applied electro-acupuncture combined with the trigger point needle-embedding for treatment of primary trigeminal neuralgia in 31 cases, yielding satis- factory results as reported in the following.     

Investigation of Matrix Metalloproteinase -1, 2 and tissue inhibitor of matrix metalloproteinases-1 in Endometriosis

Objective： To explore the role of matrix metalloproteinase-1,2 （MMP-1, MMP-2） and tissue inhibitor of matrix metalloproteinases-1 （TIMP-1） in endometriosis. Methods： The eutopic and ectopic endometria from 40 subjects suffering from endometriosis and regular.endometria from 40 subjects （excluding endometriosis） were collected and examined by in situ hybridization technology and western blot assay. Results： Both expressions of MMP-1 and -2 were stronger in ectopic endometrium and eutopic endometrium than in normal endometrium. On the contrary, the expression of TIMP-1 in ectopic endometrium and eutopic endometrium was lower. The differences were significant （P 〈 0.01 ）. Moreover, there was no relationship among the expressions of MMP-1, 2 and TIMP-1 in ectopic endometrium. Conclusion： The expressions of MMP-1, 2 and TIMP-1 lose balance and lack of periodic changes in ectopic endometrium , which explains the biological invasive behavior of endometriosis. It was suggested-that regulating the balance between the MMPs and TIMP-1 should be an ideal therapeutic target to endometriosis.     

Shi Da-zhuo (史大卓) —An outstanding cardiologist of integrative medicine

Prof. SHI Da-zhuo, Ph.D., male, was born on March 20, 1960. Prof. SHI entered the Ph.D. program in 1990 at the China Academy of Chinese Medical Sciences under the supervision of Prof. CHEN Ke-ji, majoring in the treatment of cardiovascular diseases. After receiving his Ph.D. degree in 1993, Prof. SHI started working at the Cardiovascular Center in Xiyuan Hospital affiliated to China Academy of Chinese Medical sciences.     

Persist in and Carry Forward the Integrative Medical Research——Speech at the 6th National General Congress of Chinese Association of Integrative Medicine by Academician CHEN Zhu,Minister of Ministry of Health

The 6th National General Congress of Chinese Association of Integrative Medicine （CALM） was convened at 19-20, April 2008 in Beijing. Academician CHEN Zhu, the minister of Ministry of Health indicated at the congress that the integration of Chinese and Western medicine is very well in keeping with the situation of our country and the general rule of development in medical science; and as a good integration of Chinese medicine and Western medicine, it is mutually beneficial and advantageous to both of them. Seeing the creativity shown in integrative medical investigation in theoretic and methodological sides, we should and must persist in and develop it.