Dual isotope study of iodine-125 and indium-111-labeled antibody in athymic mice.

Dual isotope study of iodine-125 and indium-111-labeled antibody in athymic mice.
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无胸腺小鼠中碘 125 和铟 111 标记抗体的双同位素研究。

DOI:
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发表时间:
1989
影响因子:
9.3
通讯作者:
D. Johnson
D. Johnson
中科院分区:
医学1区
文献类型:
--
作者:
P. L. Carney;P. E. Rogers;D. Johnson

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单克隆抗体B72.3与二亚乙基三胺五乙酸(DTPA)的异硫氰酸苄酯衍生物偶联。在不损失免疫反应性的情况下可实现的最大取代是每个免疫球蛋白分子三个DTPA组。通过与111 InCl 3短暂孵育,用111 In标记所得缀合物,得到96%的111 In标记抗体的平均放射化学产率。将[111 In]B72.3制剂与通过氯胺-T方法获得的[125 I] B72.3制剂混合,并将混合物给予皮下携带LS 174 T结肠癌异种移植物的无胸腺小鼠。注射后1、2、5和7天,两种标记物的生物分布无显著差异(p> 0.1)。这些结果与先前的研究相比,显示使用通过双环酸酐制备的B72.3-DTPA缀合物在肝、脾和肾中的111 In水平升高。它的结论是,蛋白质交联和/或形成不稳定的螯合位点的酸酐偶联共轭物的基础这些差异。
Monoclonal antibody B72.3 was coupled to a benzylisothiocyanate derivative of diethylenetriaminepentaacetic acid (DTPA). The maximum substitution achievable without loss of immunoreactivity was three DTPA groups per immunoglobulin molecule. The resulting conjugate was labeled with 111In by brief incubation with 111InCl3, giving a mean radiochemical yield of 111In-labeled antibody of 96%. The [111In]B72.3 preparation was mixed with an [125I] B72.3 preparation, obtained by the chloramine-T method, and the mixture administered to athymic mice bearing subcutaneous LS174T colon carcinoma xenografts. There were no significant differences (p greater than 0.1) in the biodistributions of the two labels at 1, 2, 5, and 7 days postinjection. These results are contrasted with prior studies showing elevated levels of 111In in liver, spleen, and kidneys using B72.3-DTPA conjugates prepared via the bicyclic anhydride. It is concluded that protein cross-linking and/or the formation of unstable chelate sites in anhydride coupled conjugates underlie these disparities.
癌症患者体内铟 111 标记的单克隆抗体的药代动力学。
DOI: --
发表时间: 1985
期刊: Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子: --
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DOI: --
发表时间: 1986
期刊: Cancer research
影响因子: 11.2
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通讯作者: Vlahos,WG
DOI: --
发表时间: 1983
期刊: Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子: --
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