Successful therapy of a human lung cancer xenograft using MAb RS7 labeled with residualizing radioiodine.

Successful therapy of a human lung cancer xenograft using MAb RS7 labeled with residualizing radioiodine.
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使用残留放射性碘标记的 MAb RS7 成功治疗人类肺癌异种移植物。

DOI:
10.1016/s1040-8428(01)00106-8
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发表时间:
2001
期刊:
Critical reviews in oncology/hematology.
影响因子:
--
通讯作者:
Goldenberg,DM
Goldenberg,DM
中科院分区:
--
文献类型:
--
作者:
Stein,R;Govindan,SV;Chen,S;Reed,L;Spiegelman,H;Griffiths,GL;Hansen,HJ;Goldenberg,DM

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我们最近报道了一种放射性碘标记的DTPA附加肽,命名为IMP-R1,是一种残留碘标记物,克服了许多阻碍残留碘临床应用发展的局限性。在这项研究中,131 I-IMP-R1-RS7,一种内化抗EGP-1单克隆抗体,通过在携带Calu-3人非小细胞肺癌异种移植物的裸鼠中进行临床前治疗研究来评估其潜力。使用350 μCi/小鼠的131 I-IMP-R1-RS7单次给药观察到9个已建立肿瘤中的6个(平均肿瘤体积=0.3 cm 3)消除,所有动物均耐受该剂量。在相同剂量和比活度的131 I-RS 7,用常规的氯胺-T法标记,有四个死亡,和一个完全缓解在9个治疗小鼠。在常规131 I标记的RS7的最大耐受剂量275 μCi下,观察到平均疾病稳定约5周,无完全缓解。在同种型匹配的对照实验中显示了治疗效果的特异性,其中131 I-IMP-R1-RS7比131 I-IMP-R1标记的对照抗体明显更有效。这些研究表明,131 I-IMP-R1-RS7与常规131 I标记的RS7相比具有治疗优势,正如先前在靶向研究中观察到的肿瘤生长增加所预测的那样。在该肿瘤模型中,使用已建立的大肿瘤(平均肿瘤体积=0.85 cm 3),直接比较131 I-IMP-R1-RS7(350 μCi)和90 Y-DOTA-RS7(105 μCi)的最大耐受剂量。两种治疗的抗肿瘤疗效和毒性相当。
We have recently reported that a radioiodinated, DTPA-appended peptide, designated IMP-R1, is a residualizing iodine label that overcomes many of the limitations that have impeded the development of residualizing iodine for clinical use. In this study the potential of131I-IMP-R1-RS7, an internalizing anti-EGP-1 monoclonal antibody, was evaluated by performing preclinical therapy studies in nude mice bearing Calu-3 human non-small cell carcinoma of the lung xenografis. Elimination of 6 of 9 established tumors (mean tumor volume=0.3 cm3) was observed using a single dose of 350 μCi/mouse of131I-IMP-R1-RS7, with all animals tolerating the dose. At the same dose and specific activity of131I-RS7, labeled using the conventional chloramine-T method, there were four deaths, and one complete remission in nine treated mice. At the maximum tolerated dose of conventionally131I-labeled RS7, 275 μCi, mean stable disease for ∼5 weeks was observed, with no complete responses. Specificity of the therapeutic effect was shown in an isotype-matched control experiment, where131I-IMP-R1-RS7 was markedly more effective than the131I-IMP-R1-labeled control antibody. These studies demonstrate that131I-IMP-R1-RS7 provides a therapeutic advantage in comparison to conventional131I-labeled RS7, as predicted by the increased tumor accretion observed previously in targeting studies. A direct comparison of the maximum tolerated doses of131I-IMP-R1-RS7 (350 μCi) and90Y-DOTA-RS7 (105 μCi) was performed in this tumor model using large established tumors (mean tumor volume=0.85 cm3). Anti-tumor efficacy and toxicity of the two treatments were comparable.
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影响因子: 6.4
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