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Erschienen in: Tumor Biology 12/2014

01.12.2014 | Research Article

Tumor vascular homing endgolin-targeted radioimmunotherapy in hepatocellular carcinoma

verfasst von: Chong-Ling Duan, Gui-Hua Hou, Yan-Ping Liu, Ting Liang, Jing Song, Jian-Kui Han, Chao Zhang

Erschienen in: Tumor Biology | Ausgabe 12/2014

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Abstract

Endoglin is a proliferation-associated cell membrane antigen and overexpressed in the angiogenic vasculature of solid tumors. However, the applications of endoglin (ENG)-targeted radioimmunotheray in hepatocellular carcinoma have not been reported yet. Therefore, the aim of this study was the visualization of both the development of hepatocellular carcinoma (HCC) tumor burden and therapeutic effect with ENG-targeted 131I-anti-ENG mAb (A8), via in vivo noninvasive fluorescence imaging (NIFLI) of SMMC7721-green fluorescent protein (GFP) cells. A8 showed a dose-dependent, time-dependent suppression on the proliferation of SMMC7721-GFP cells and human umbilical vein endothelial cells (HUVECs) in vitro. Tube formation assay showed that 131I-A8 markedly inhibits HUVECs to form extensive and enclosed tube networks. The results showed that the radiochemical purity of 131I-A8 was 92.8 % and 131I-A8 maintained more stable in serum than in saline and had high affinity against SMMC7721-GFP cells. The pharmacokinetics of 131I-A8 was in accordance with the two-compartment model, with a rapid distribution phase and a slow decline phase. NIFLI exhibited a good relation between the fluorescent signal and tumor volume in vivo. Furthermore, treatment with 131I-A8 resulted in significant tumor-growth suppression on the basis of the reducing fluorescent signal and a remarkably decreased tumor weight in treated animals. These results were further verified by RT-PCR and immunohistochemistry staining. Our findings indicate that 131I-A8 can be used as ENG-targeted therapy for hepatocellular carcinoma, and noninvasive fluorescence imaging provides valuable information on tumor burden and effectiveness of therapy.
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Metadaten
Titel
Tumor vascular homing endgolin-targeted radioimmunotherapy in hepatocellular carcinoma
verfasst von
Chong-Ling Duan
Gui-Hua Hou
Yan-Ping Liu
Ting Liang
Jing Song
Jian-Kui Han
Chao Zhang
Publikationsdatum
01.12.2014
Verlag
Springer Netherlands
Erschienen in
Tumor Biology / Ausgabe 12/2014
Print ISSN: 1010-4283
Elektronische ISSN: 1423-0380
DOI
https://doi.org/10.1007/s13277-014-2529-1

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