抗成长型肝炎病毒重组蛋白单克隆抗体的制备和初步应用

目的：制备抗-戊型肝炎病毒的单克隆抗体，并将其用于分析戊型肝炎病毒不同毒株结构蛋白的抗原表位。方法：采用来自墨西哥株（Mexican strain)的戊型肝炎病毒重组蛋白（p166Mex)免疫Balb/c小鼠，取其脾细胞与SP2/0骨髓瘤细胞进行融合，经酶联免疫吸附试验（ELISA）法筛选阳性克隆，并将获得的单克隆抗体与戊型肝炎病毒缅甸株（Burma strain)和美国株（USA strain)的重组蛋白（p166Bur,p166US)进行交叉反应测定。结果：最终获得4株能稳定分泌抗-p166Mex的杂交瘤细胞株。即D8G10,E5E12,D4A3,B7E6。其中D8G10，E5E12和B7E6细胞株的培养上清液，还能分别与p166Bur和p166US重组蛋白发生阳性反应。结论：利用已获得的抗-p166Mex单克隆抗体，初步确定3种不同的戊型肝炎病毒重组蛋白（p166Bur,p166US,p166Mex)含有一种共同的抗原表位。     

兔戊型肝炎病毒ORF2编码蛋白的抗原表位分析

目的:研究新发现的兔戊型肝炎病毒(HEV)与所有已知基因型HEV抗原表位的异同,为阐明动物HEV的人畜共患特征及戊型肝炎的诊断提供依据。方法:制备兔HEV ORF2重组蛋白R166(aa452-617),并免疫BALB/c小鼠制备单克隆抗体(McAb);采用间接ELISA法及免疫印迹法,检测McAbs与已知基因型HEV ORF2重组蛋白p166Bur(1型)、p166Mex(2型)、p166US(3型)和p166Chn(4型)的交叉反应性。用获得的杂交瘤细胞制备腹水,利用基于PCR的HEV体外中和试验,检测它们对基因1、4型人HEV和兔HEV的中和活性。结果:获得3株稳定分泌抗-R166的McAbs的杂交瘤细胞株,即1C1、6F9和10D2。其中1C1和6F9分泌的McAbs与已知1、2、3、4基因型p166均结合;10D2分泌的McAb只与R166特异结合,而不与1、2、3、4基因型p166结合。3株McAbs腹水均不能中和基因1、4型人HEV和兔HEV,提示3株McAbs针对非中和性抗原表位。结论:兔HEV与已知1、2、3、4基因型HEV既含有共同的抗原表位,也含有不同的抗原表位,具有不同的抗原特征。     

卵巢癌抗抗独特型单克隆抗体3D12的制备及初步研究

目的:制备卵巢癌抗抗独特型单克隆抗体并进行初步鉴定,为深入研究卵巢癌疫苗的主动免疫机制奠定基础.方法:以卵巢癌抗独特型单克隆抗体6B11作为免疫原,采用杂交瘤技术制备抗抗独特型单克隆抗体3D12.经酶联免疫吸附实验(ELISA)、免疫组织化学、流式细胞学、免疫印迹杂交等检测其特异性结合抗原的性质;竞争抑制实验鉴定其特异性结合的抗原表位.结果:获得1株稳定分泌3D12的杂交瘤细胞,所分泌的3D12能够特异性结合6B11及卵巢癌初始抗原OC166-9,并能竞争抑制COC166-9(抗OC166-9的单克隆抗体Ab1)与OC166-9的结合.免疫印迹杂交显示,3D12与COC166-9免疫沉淀的蛋白的相对分子质量相同.该抗体为IgM,亲和力约为8.34×10⁷ L/mol.结论:卵巢癌抗抗独特型单克隆抗体3D12属Ab1样Ab3,间接证实6B11为抗原内影像型抗独特型抗体.     

全人源抗狂犬病病毒糖蛋白抗体的制备及鉴定

目的:利用重组狂犬病病毒糖蛋白(RVG)免疫人源IgM转基因小鼠,制备全人源抗重组RVG蛋白单克隆抗体,并对其免疫学特性进行初步鉴定?方法:以重组RVG蛋白作为抗原免疫人源IgM转基因小鼠,采用杂交瘤技术制备筛选全人源抗重组RVG蛋白杂交瘤细胞株,双抗体夹心ELISA实验鉴定单抗的人源性及抗体类型,并对其特异性及与灭活狂犬病病毒CVS-11株的结合能力进行鉴定?结果:建立了5株稳定分泌抗重组RVG的全人源单克隆抗体杂交瘤细胞株,分别命名为5D1?6H11?9A3?15D6?19E6,均为人源IgM免疫球蛋白,5株单抗均能特异性识别重组RVG蛋白,其中3株能与灭活狂犬病病毒CVS-11株特异性结合?结论:筛选制备了特异性全人源抗重组RVG蛋白的单克隆抗体,能与灭活狂犬病病毒CVS-11株特异性结合,为进一步研制用于狂犬病防治的抗体药物奠定了基础?     

登革病毒非结构蛋白NS1群特异性单克隆抗体的制备及初步应用

目的 制备登革病毒NS1群特异性单克隆抗体,建立可检测登革病毒1～4型NS1抗原的ELISA检测法,为登革热的早期快速诊断奠定基础.方法 应用毕赤酵母表达系统分泌表达登革病毒2型重组非结构蛋白NS1,以此为抗原免疫BABL/c小鼠,取其脾细胞与小鼠骨髓瘤细胞融合,经HAT选择培养、间接ELISA筛选和亚克隆,获得能稳定分泌登革病毒NS1群特异性单克隆抗体的杂交瘤细胞株;用所获得的单克隆抗体建立可检测1～4型登革病毒NS1抗原的双抗体夹心ELISA法.结果 从登革病毒2型NS1重组毕赤酵母(Pichia Pastoris-NS1)中获得了大量纯化的登革病毒重组NS1蛋白;经免疫小鼠、细胞融合、间接ELISA筛选及3次亚克隆后,最终获得2株能高效分泌抗登革病毒NS1单克隆抗体的杂交瘤细胞株2D7B6B4和2D10E2F6,间接ELISA显示抗体效价高达1∶8 000～1∶16 000;ELISA及免疫荧光检测证实,其所分泌的抗体与1～4型登革病毒及其重组NS1蛋白均有特异性免疫反应,为登革病毒NS1群特异性单克隆抗体;两株单克隆抗体均为IgG2a亚类;初步建立了检测4个血清型登革病毒NS1抗原的双抗体夹心ELISA法.结论 成功研制出两株能高效分泌抗登革病毒NS1群特异性单克隆抗体的杂交瘤细胞株.初步建立了可检测1～4型登革病毒NS1抗原的双抗体夹心ELISA检测法.     

抗人PDCD10单克隆抗体的制备和鉴定

目的:制备鼠抗人程序性细胞死亡分子10(programmed cell death 10, PDCD10)的单克隆抗体,探讨PDCD10蛋白的结构和功能.方法:利用重组PDCD10蛋白为免疫原,免疫BALB/C小鼠,取免疫小鼠的脾细胞和同系小鼠的骨髓瘤细胞Sp2/0进行常规融合, 通过间接ELISA的筛选和有限稀释克隆化,获得鼠抗PDCD10蛋白单克隆抗体的杂交瘤细胞株,通过ELISA,Western blot和免疫荧光实验等方法对其特性进行鉴定.结果:成功地建立了3株稳定分泌抗PDCD10蛋白的单克隆抗体杂交瘤细胞株,分别命名为5G1, 4F7和3H5.3株单克隆抗体的免疫球蛋白亚类分别为IgG1(4F7和5G1)和IgG2b(3H5).ELISA检测的单克隆抗体腹水效价可达1:10⁷.3株单克隆抗体与重组PDCD10蛋白有较强的特异性反应,而与大肠杆菌细胞裂解液以及谷胱苷肽-S转移酶(glutathione S-transferase,GST)没有交叉反应.同时,5G1单克隆抗体也能特异性地结合真核细胞内源性和超表达的PDCD10蛋白,免疫荧光竞争结合实验以及Western blot的结果证明3株PDCD10的单克隆抗体能够识别不同的抗原表位,内源性以及超表达的PDCD10蛋白主要定位在细胞核.结论:获得了效价高、特异性好的PDCD10蛋白的单克隆抗体,为PDCD10的生物学功能研究奠定了基础.     

抗HSPC238单克隆抗体的制备和初步鉴定

目的 制备抗HSPC238的单克隆抗体,为HSPC238的功能研究奠定基础.方法 以纯化的重组蛋白HSPC238为抗原,免疫BALB/c小鼠,运用杂交瘤技术制备HSPC238单克隆抗体,并用问接ELISA法和Westem-blot法对单克隆抗体的特性进行鉴定.结果 成功建立两株稳定分泌抗HSPC238的单克隆抗体杂交瘤细胞株,分别命名为E001和E002.ELISA检测抗HSPC238单克隆抗体的腹水效价为1:12800和1:25600.两株单克隆抗体的免疫球蛋白亚类均为Ig异G1.通过Western-blot实验证实,两株单克隆抗体均能特异性结合真核细胞内源性HSPC238蛋白.结论 成功制备了两株效价高、特异性好的抗HSPC238单克隆抗体,制备的抗HSPC238单克隆抗体可用于HSPC238蛋白的鉴定,为HSPC238蛋白的生物学功能研究奠定了基础.     

SIV p27单克隆抗体的制备和鉴定

目的建立SIVp27杂交瘤细胞株，并对其分泌的SIVp27单克隆抗体进行初步鉴定。方法使用基因重组的SIVp27蛋白免疫BALB/c小鼠，采用杂交瘤技术使用半固体培养基法建立杂交瘤细胞株，制备单克隆抗体。通过染色体核型对杂交瘤细胞株进行鉴定；采用Western blot、免疫荧光法、酶联免疫吸附法确定单克隆抗体的交叉反应性、相对亲和力、抗原识别表位、免疫球蛋白的类型和亚类。对单克隆抗体进行鉴定。结果获得4株可稳定分泌SIVp27单克隆抗体的杂交瘤细胞，IC3、286为IgG1类，2E12为IgG2b类，3G3为IgG2a类。4株单抗均能识别SIV的p27蛋白，与逆转录病毒SRV、STLV无交叉反应，286、2E12与H1Vp24有交叉反应。免疫荧光法检测腹水效价为1：10240～1：40960。1C3、286、2E12、3G3染色体平均数分别为103、97、96、101。2E12与3G3识别不同的抗原表位。结论成功地制备出4株SIVp27单克隆抗体，均具有良好的特异性和亲和力，为进一步建立免疫分析方法，进行SIV／SAIDS及其艾滋病相关研究，奠定了基础。     

重组人内抑素单克隆抗体的制备及初步鉴定

目的制备抗重组人内抑素(ES)单克隆抗体(McAb)并进行鉴定。方法利用重组人ES为抗原,免疫Balb/c小鼠,应用杂交瘤技术将免疫小鼠的脾细胞与同源小鼠骨髓瘤细胞(SP2/0)进行融合,间接ELISA法对细胞培养上清进行筛检,对能稳定分泌抗重组人ES的细胞株,进行扩大培养。体内诱生法制备腹水并对其初步鉴定。结果获得3B4、1D10、1G5、2D10,4株能稳定分泌抗重组人ESMcAb的杂交瘤细胞株,并对3B4和1D10两株给予鉴定,其免疫亚型为IgG2a、IgG3。腹水ELISA效价为10-6、10-5。通过蛋白免疫印迹法和免疫组化证明抗体有特异性和敏感性。结论成功制备分泌抗重组人ES的杂交瘤细胞株,为研究人ES的表达及相关领域奠定了基础。     

日本第53届实验动物学会年会介绍

[目的]建立SIVp27杂交瘤细胞株,并对其分泌的SIVp27单克隆抗体进行初步鉴定。[方法]使用基因重组的SIVp27蛋白免疫BALB/c小鼠,采用杂交瘤技术使用半固体培养基法建立杂交瘤细胞株,制备单克隆抗体。通过染色体核型对杂交瘤细胞株进行鉴定;采用Westernblot、免疫荧光法、酶联免疫吸附法确定单克隆抗体的交叉反应性、相对亲和力、抗原识别表位、免疫球蛋白的类型和亚类,对单克隆抗体进行鉴定。[结果]获得四株可稳定分泌SIVp27单克隆抗体的杂交瘤细胞,1C3、2B6为IgG1类,2E12为IgG2b类,3G3为IgG2a类。四株单抗均能识别SIV的p27蛋白,与逆转录病毒SRV、STLV无交叉反应,2B6、2E12与HIVp24有交叉反应。免疫荧光法检测腹水效价为1:10240~40960。1C3、2B6、2E12、3G3染色体平均数分别为103、97、96、101。2E12与3G3识别不同的抗原表位。[结论]成功地制备出四株SIVp27单克隆抗体,均具有良好的特异性和亲和力,为进一步建立免疫分析方法,进行SIV/SAIDS及其艾滋病相关研究,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.     

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.