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放射免疫显像

放射免疫显像的相关文献在1989年到2020年内共计240篇,主要集中在肿瘤学、特种医学、基础医学 等领域,其中期刊论文238篇、会议论文2篇、专利文献66657篇;相关期刊106种,包括中国计划生育和妇产科、中国免疫学杂志、中国实验诊断学等; 相关会议2种,包括中国核学会2013年学术年会、第二届徐州科技论坛暨徐州市第五届青年学术年会等;放射免疫显像的相关文献由535位作者贡献,包括吴锦昌、阮长耿、季顺东等。

放射免疫显像—发文量

期刊论文>

论文:238 占比:0.36%

会议论文>

论文:2 占比:0.00%

专利文献>

论文:66657 占比:99.64%

总计:66897篇

放射免疫显像—发文趋势图

放射免疫显像

-研究学者

  • 吴锦昌
  • 阮长耿
  • 季顺东
  • 吕斌
  • 常伟勤
  • 刘长征
  • 张玮
  • 田嘉禾
  • 蒋宁一
  • 万卫星
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 郭容; 安锐
    • 摘要: 耐药、复发和转移是恶性肿瘤临床治疗失败的主要原因.近年来,随着分子生物学与细胞生物学研究的不断深入,人们发现肿瘤干细胞(CSCs)是导致恶性肿瘤耐药、复发和转移的主要原因.CSCs靶向示踪与治疗或将有助于彻底治愈恶性肿瘤,放射免疫显像(RII)与放射免疫治疗(RIT)可以在活体水平精准示踪和靶向治疗CSCs,在恶性肿瘤的诊疗一体化研究中发挥关键性作用.本文总结了CSCs的RII和RIT的研究进展及发展趋势.
    • 刘倩; 刘琼; 李文波; 许璐; 周静; 刘影; 庞华
    • 摘要: Purpose To study the radioactive purity and activity of 131I labeled human single chain variable fragments antibodies (scFv) against anaplastic thyroid carcinoma (ATC),and to explore its distribution and radioimmunoimaging characteristics in tumor bearing nude mice model in vivo so as to provide a new method for anaplastic thyroid carcinoma diagnosis and treatment.Materials and Methods The nude mice model bearing human anaplastic thyroid carcinoma was constructed.The chloramine T method was used to label scFv with 131I and the Sephadex G25M was used for purification of labeled scFv.Labeling rate was determined by trichloroacetic acid method;radiochemical purity,room temperature stability and serum stability were examined using paper chromatography.131I-scFv was injected via tail vein in mice,and the distribution of 131I-scFv in body tissues and organs was analyzed at 12,24,48,72 h after injection.Static SPECT imaging was performed at 12,24,48,72 h after injection to observe the intratumoral accumulation of radioactivity.The SPECT/CT image fusion was performed when the tumor tissues were clearly visible.Results 131I-scFv was purified,and the labeling rate was 91.64%;the radiochemical purity was (93.3 ±0.3)%.The radiochemical purity of 131l-scFv placed at room temperature and the serum for 1,6,12,24 h were all >90%.The radioactive distribution of 131I-scFv in tumor,liver,kidney,intestine and blood was high.SPECT imaging showed 131I-scFv was selectively concentrated in tumor tissue;the targeton-target ratio was the highest at 48 h,and the imaging was most satisfactory.Conclusion 131I-scFv can be successfully prepared.SPECT imaging of 131I-scFv in nude mice model is satisfactory,which lays the foundation for further research in ATC diagnosis and treatment.%目的 测定131I标记的甲状腺未分化癌(ATC)人源单链抗体(scFv)的放射性纯度与比活度,并探讨其在荷瘤裸鼠模型的体内分布情况和放射免疫显像特点,以期为ATC的诊断及治疗提供一种新的方法.材料与方法接种ATC细胞构建荷人ATC裸鼠模型.采用氯胺T法实现scFv的131I标记,Sephadex G25M柱纯化标记抗体,采用三氯醋酸法测定其标记率,采用纸层析法测定131I标记scFv的放化纯度、室温稳定性及血清稳定性.荷瘤裸鼠尾静脉注射131I-scFv后12、24、48、72 h取各组织器官分析131I-scFv在体内组织器官中的生物分布情况,另取荷瘤裸鼠尾静脉注射131I-scFv后12、24、48、72 h进行SPECT静态显像,观察瘤内放射性浓聚,待肿瘤清晰显影,进行SPECT/CT图像融合.结果 纯化后的131I-scFv标记率为91.64%,放化纯度为(93.3±0.3)%;131I-scFv放于室温及血清孵育1、6、12、24 h后所测得放射性化学纯度均高于90%.131I-scFv在肿瘤组织、肝、肾、肠、血液中具有较高的放射性分布.SPECT显示131I-scFv能够在肿瘤组织中选择性浓聚,肿瘤组织靶/非靶比值在48 h时达最高为4.38,且显影最清晰.结论 成功制备131I-scFv,131I-scFv在荷瘤裸鼠模型中有较好的显像效果,为进一步开展ATC的诊断及治疗研究奠定基础.
    • 柏志成; 杨敏
    • 摘要: 人类表皮生长因子受体2(HER2)是肿瘤重要的分子标志物之一,检测HER2表达对HER2阳性肿瘤的诊疗具有重要意义.放射免疫显像(RII)为在体HER2表达检测提供了一种更加准确、精细的方法,而灵敏、特异的分子探针则是进行放射免疫显像研究的先决条件.近来,靶向HER2的亲合体(Affibody)分子探针越来越受到人们关注.亲和体又称“人工抗体”,是一类基于非免疫蛋白亲和配体的新型支架蛋白,与抗体相比具有亲和性好、组织渗透力强等特点,其中第二代亲合体是在第一代基础上进行定点变异筛选而来,具有更强的特异性和稳定性.本文对第二代HER2亲合体分子探针在放射免疫显像中的研究进展进行综述.
    • 刘琼; 庞华; 李文波; 周静; 许璐; 奚级梅
    • 摘要: 目的 测定131I标记的抗甲状腺髓样癌(MTC)人源单链抗体(scFv)的放射化学纯度,并研究荷MTC细胞(TT cells)裸鼠131I-scFv体内分布和体外放射免疫(RII)显像特点.方法 氯胺T法对scFv进行131I标记,Sephadex G200纯化标记抗体,三氯醋酸沉淀法测定标记率,纸层析法测定标记抗体在1、6、12、24 h的放射化学纯度、室温稳定性和血清稳定性.构建荷TT细胞裸鼠模型,尾静脉注射131I-scFv,分析131I-scFv在裸鼠重要组织器官的分布情况,并于注射药物12、24、48、72 h行SPECT正位静态显像,观察肿瘤内放射性浓集情况,肿瘤组织显像清晰时行SPECT/CT融合图像.结果 标记抗体经纯化后,测得标记率为(78.60±0.08)%,放射化学纯度为(87.10±0.78)%,各个时间点的放射化学纯度均在90%以上.荷瘤裸鼠体内研究结果显示,131I-scFv的放射性瘤/血、瘤/肌肉比值随时间的增长逐渐增高,48 h达最高.RII显示,131I-scFv可选择性聚集于肿瘤组织,48 h时肿瘤显像与全身组织对比最清晰,此时融合图像可清晰显示肿瘤部位的放射性浓聚情况,体内分布和体外显像结果一致.结论 成功标记了抗MTC人源scFv,生物活性较高,荷瘤裸鼠肿瘤的RII较好.
    • 曾永龙; 邓启民; 刘媛媛; 王邦金
    • 摘要: 放射性核素标记的单克隆抗体能够特异地与肿瘤相关抗原结合,以该药物为基础的RIT和RII用于肿瘤治疗和诊断,是非常有效的方法。越来越多的RIT和RII相关药物进入临床前和临床研究.笔者对目前研究现状作一综述。
    • 曾永龙; 邓启民; 刘媛媛; 王邦金
    • 摘要: Radiolabeled monoclonal antibodies can specifically bind to tumor-associated antigens.On this immune basis,RIT and RII have therefore been used in the diagnosis and treatment of cancer.Many RIT and RII pharmaceuticals were applied in trials of preclinical and clinical phases,and excellent results had been achieved.This paper reviews on the current status of RIT and RII pharmaceuticals.%放射性核素标记的单克隆抗体能够特异地与肿瘤相关抗原结合,以该药物为基础的RIT和RII用于肿瘤治疗和诊断,是非常有效的方法.越来越多的RIT和RII相关药物进入临床前和临床研究,笔者对目前研究现状作一综述.
    • 别彩群; 梁旭竞; 汤绍辉; 李萌; 孙士敏; 范红梅
    • 摘要: Objective To investigate the radioimmunoimaging of 99mTc labelled humanized single-chain Fv dimmers(BDM3) and immunonanoparticles for hepatocellular carcinoma in nude mice bearing human hepatocellu-lar carcinoma,and to study their application in diagnosis and therapy of hepatocellular carcinoma. Methods The label rate of 99mTc-BDM3 and 99mTc-BDM3 nanoparticles was determined by isotopic analyzer. The labelled BDM3 and BDM3 nanoparticles were injected intraperitoneally into the nude mice bearing human hepatocellular carcino-ma. At intervals of 1 h,4 h and 8 h,the mice in each group were imaged on a SPECT,and then were sacrificed immediately to get various organs and tumors. Radioactivity ratio of tumor to non-tumor (T/NT) was measured. Results The label rates of 99mTc-BDM3 and 99mTc-BDM3 nanoparticle were 91% and 92%,respectively;The posi-tive display rates by the antibody and its nanoparticle were both 100%;The ratio of T/NT were (1.63±0.17) and (3.63±0.21) 1 h,(3.82±0.24) and (5.63±0.26) 4 h,(0.48±0.21) and (1.41±0.32) 8 h after injection of 99mTc-BDM3 and 99mTc-BDM3 nanoparticle,respectively. The differences between two groups were statistical sig-nificance;Favorable images were obtained after 4 h. The labelled BDM3 and BDM3 nanoparticles concentrated in carcinoma and did not in nontumor,that showed an evident targeting effect in tumor. As a result of a double tar-geting effect,the BDM3 nanoparticles group had more concentration in tumor,and increased the imaging effect. Conclusions The humanized single-chain Fv dimmers (BDM3) and immunonanoparticles for hepatocellular car-cinoma has high affinity to nude mice bearing human hepatocellular carcinoma xenografts. They could be target carrier for diagnosis and therapy of hepatocellular carcinoma.%目的:观察99mTc 标记的人源化抗肝癌双链抗体 BDM3及双链抗体纳米颗粒在荷肝癌动物体内的靶向分布及放射免疫显像,探讨其对肝癌的靶向诊断和治疗的价值。方法使用99mTc 对人源化抗肝癌双链抗体 BDM3及双链抗体纳米颗粒进行标记,并测定标记率,将标记好的抗体及抗体纳米颗粒经腹腔注入荷瘤裸鼠体内,在注射后不同时间点进行放射免疫显像。取各脏器及肿瘤组织,计算肿瘤/非肿瘤比值。结果99mTc 标记的双链抗体BDM3和双链抗体纳米颗粒标记率为91%和92%,显像率均达100%。注射后1 h 肿瘤/血比值为(1.63±0.17)和(3.63±0.21),4 h 肿瘤/血比值为(3.82±0.24)和(5.63±0.26),8 h 肿瘤/血比值为(0.48±0.21)和(1.41±0.32),两组比较,差异均有统计学意义(P<0.01,P<0.001和 P<0.01),表明同位素标记的双链抗体和双链抗体纳米颗粒均能在肿瘤组织中浓聚,而在非肿瘤组织中无浓聚现象,因而具有明确的靶向性,而抗体纳米颗粒因具有双重靶向作用,其浓聚现象较抗体本身更显著,能进一步增加显像效果。结论99mTc 标记的双链抗体 BDM3及其纳米颗粒对肝癌组织具有很好的亲和力,可作为肝癌诊断和治疗的靶向载体。
    • 方琳; 程乾; 李望; 刘俊杰; 郑骏年
    • 摘要: Objective To test the activity of Ad - G250 expressing anti - G250 antibody and its effects on the pro -liferation and apoptosis of renal cell carcinoma . Methods Ad-G250 and Ad-EGFP were propagated in HEK293 cells and then purified. LO-2 cells were infected with Ad-G250,and the antibody' s expression level was detected by ELISA. The cell culture liquid was purified. Western blotting was used to determine the molecular weight of the purified antibody and detect whether the purified antibody could bind to G 250 protein specifically. Immunohistochemistry was used to detect the activity and specificity of the purified antibody . Cell proliferation was assayed by CCK -8 method. The ap- optosis of tumor cells was measured by Annexin V-PE/7-ADD. Results The expression level of the antibody in LO-2 cells infected with Ad-G250 increased as days went by. Western blotting results showed that LO-2 cells infected with Ad-G250 could express the light chain and heavy chain respectively . The purified antibodies could bind to G 250 antigen of the Ketr-3 and 786-O cells,but not in ACHN and HK-2 cells ( G250 antigen-negative ) . Immunohisto- chemistry showed that the cell membrane of the Ketr-3 cells was stained,but not the ACHN cells. CCK-8 assay showed Ad-G250 inhibited the proliferation in Ketr-3 cells effectively,but not in ACHN cells. And the effect of inhi-bition was dose and time-dependent. Ad-G250 could induce more apoptosis in Ketr-3 and ACHN,but the efficacy in Ketr-3 was more obvious than that in ACHN . Both Ad-G250 and Ad-EGFP could induce the apoptosis in Ketr-3,but the effect produced by Ad-G250 was stronger than that induced by Ad-EGFP. Conclusion We had successfullyrnconstructed adenovirus expressed the anti-G250 fully human antibody. Ad-G250 inhibits renal cancer cells proliferation and induces apoptosis.%目的 检测腺病毒Ad-G250表达的G250全长人源性抗体的生物学活性及其对肾癌细胞的影响.方法 扩增纯化腺病毒Ad-G250、Ad-EGFP(对照病毒).病毒感染LO-2细胞,ELISA法检测细胞培养液中抗体的表达量.收集病毒感染后的细胞上清液进行纯化,Western blotting检测纯化抗体的相对分子质量及其与细胞表面G250抗原的结合能力.免疫组化法检测Ad-G250表达的抗体是否具有生物学活性.CCK-8法检测Ad-G250对肾癌Ketr-3及ACHN细胞增殖的影响.Annexin V-PE/7-AAD法检测Ad-G250对肾癌Ketr-3及ACHN细胞凋亡的影响.结果 病毒Ad-G250感染LO-2细胞后G250抗体的表达量随着感染天数的增加而增加.Western blotting实验显示Ad-G250能够表达G250抗体的轻链和重链,电泳图上该抗体能使G250抗原阳性的Ketr-3和786-O细胞在相对分子质量58×103附近出现反应条带,而G250抗原阴性的ACHN和HK-2细胞在相应位置无反应条带.细胞免疫组化实验显示Ketr-3细胞膜被染成棕黄色,而ACHN细胞未见着色.CCK-8实验结果显示,Ad-G250对Ketr-3细胞有抑制作用,而对ACHN细胞的抑制作用不明显;Ad-G250抑制Ketr-3细胞增殖存在浓度及时间依赖性.凋亡实验显示,Ad-G250诱导Ketr-3细胞凋亡作用和ACHN细胞相比差异具有统计学意义,Ad-G250诱导Kert-3凋亡作用和Ad-EGFP相比差异有统计学意义.结论 腺病毒Ad-G250成功表达出具有生物学活性的人源性G250抗体,且Ad-G250可抑制表达G250抗原的肾癌细胞增殖,诱导其凋亡.
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