title: A Gelatinases-targeting scFv-based Fusion Protein Shows Enhanced Antitumour Activity with Endostar against Hepatoma.
abstract: Gelatinases play important roles in tumour invasion and metastasis and are thus considered promising targets for cancer therapy. In this study, a new single-chain variable fragment (scFv)-based fusion protein Fv-LDP, composed of the anti-gelatinases scFv and lidamycin apoprotein (LDP), was prepared, and its combination with angiogenesis inhibitor Endostar was then investigated. The fusion protein Fv-LDP specifically bound to various tumour cells, and its binding capability to human pulmonary giant cell carcinoma (PG) cells was higher than that of LDP. Fv-LDP inhibited the expression and secretion of gelatinases and could be internalized into tumour cells via endocytosis. Fv-LDP also suppressed the growth of human hepatoma cells and murine hepatoma 22 transplanted in Kunming mice in various degrees. In addition, Endostar could enhance the synergistic or additive inhibition of Fv-LDP on the growth, migration or invasion of human hepatoma cells shown by a colony formation assay and a transwell-based migration or invasion assay, respectively. In vivo, Fv-LDP/Endostar combination showed a significantly synergistic effect on the growth of a human hepatoma xenograft, with an inhibition rate of 80.8% compared with the Fv-LDP (44.1%) or Endostar (8.9%)-treated group. The above-mentioned results indicate that the fusion protein Fv-LDP is effective against transplantable hepatoma in mice and human hepatoma xenografts in athymic mice. Moreover, Endostar can potentiate the inhibition effect of Fv-LDP on the growth of human hepatoma cells and xenografts. These data will provide a new combined strategy for improving the therapeutic efficacy of treatments for hepatoma or other gelatinase-overexpressing tumours.
authors.affiliation: Department of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
authors.forename: Ruijuan
authors.initials: R
authors.lastname: Gao
authors.affiliation: Department of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
authors.forename: Boyang
authors.initials: B
authors.lastname: Shang
authors.affiliation: Department of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
authors.forename: Chunyan
authors.initials: C
authors.lastname: Zhao
authors.affiliation: Department of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
authors.forename: Weijin
authors.initials: W
authors.lastname: Sheng
authors.affiliation: Department of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
authors.forename: Diandong
authors.initials: D
authors.lastname: Li
mesh_terms: D000617:Aminoglycosides / Q000008:administration & dosage / Q000494:pharmacology*; D020533:Angiogenesis Inhibitors / Q000008:administration & dosage / Q000494:pharmacology; D000818:Animals; D001059:Apoproteins / Q000008:administration & dosage / Q000494:pharmacology; D018286:Carcinoma, Giant Cell / Q000188:drug therapy / Q000201:enzymology / Q000473:pathology; D006528:Carcinoma, Hepatocellular / Q000188:drug therapy* / Q000201:enzymology / Q000473:pathology; D045744:Cell Line, Tumor; D004357:Drug Synergism; D043169:Endostatins / Q000008:administration & dosage / Q000494:pharmacology*; D053281:Enediynes / Q000008:administration & dosage / Q000494:pharmacology*; D005260:Female; D018093:Gelatinases / Q000378:metabolism; D006801:Humans; D008113:Liver Neoplasms / Q000188:drug therapy* / Q000201:enzymology / Q000473:pathology; D008175:Lung Neoplasms / Q000188:drug therapy / Q000201:enzymology / Q000473:pathology; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D011994:Recombinant Proteins; D057127:Single-Chain Antibodies / Q000008:administration & dosage / Q000494:pharmacology*; D023041:Xenograft Model Antitumor Assays
chemical_list: D000617:Aminoglycosides; D020533:Angiogenesis Inhibitors; D001059:Apoproteins; D043169:Endostatins; D053281:Enediynes; D011994:Recombinant Proteins; D057127:Single-Chain Antibodies; C058024:C 1027; D018093:Gelatinases; C522911:endostar protein