A bivalent single-chain Fv fragment against CD47 induces apoptosis for leukemic cells

2004 ◽  
Vol 315 (4) ◽  
pp. 912-918 ◽  
Author(s):  
Yasufumi Kikuchi ◽  
Shinsuke Uno ◽  
Yasushi Yoshimura ◽  
Koji Otabe ◽  
Shin-ichiro Iida ◽  
...  
Keyword(s):  
Leukemic Cells ◽  
Single Chain ◽  
Single Chain Fv ◽  
Single Chain Fv Fragment

Anti-Human Epidermal Growth Factor Receptor 2 Single-Chain Fv Fragment-Decorated DM1 Nanoparticles for Specific Targeting of Human Epidermal Growth Factor Receptor 2-Positive Breast Tumor Cells

2021 ◽  
Vol 17 (3) ◽  
pp. 447-455
Author(s):  
Ling Ni ◽  
You-Xin Li
Keyword(s):  
Breast Cancer ◽  
Epidermal Growth Factor Receptor ◽  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Growth Factor Receptor ◽  
Single Chain ◽  
Human Epidermal Growth Factor ◽  
Single Chain Fv ◽  
Epidermal Growth ◽  
Single Chain Fv Fragment

Purpose: Although monoclonal antibodies are used to decorate nanoparticles to target specific cells, penetration of tumor tissues by monoclonal antibodies is limited by their large size. Therefore, we prepared DM1 nanoparticles decorated with the small anti-HER2 single-chain Fv fragment (scFvHER2) of trastuzumab (TMAB) for targeting to human epidermal growth factor receptor 2 (HER2) overexpressing in breast cancer effectively. Methods: ScFvHER2 fragment was coupled with DM1 nanoparticles (NPs) via covalent thiol-maleimide linkages. Their physicochemical properties, uptake by cells, and toxicity to tumor cells were investigated. Their vivo biodistribution was assessed employing liquid chromatographytandem mass spectrometry, while their antitumor activity was investigated in nude mice burdened with BT-474 tumor. Results: Viability of BT-474 cells incubated with scFvHER2-DM1-Nanoparticles (scFv-DM1-NPs) was significantly lower than that of BT-474 cell treated with TMAB-DM1-Nanoparticles (TMAB-DM1-NPs) (P < 0 05). Uptake by cells of scFvDM1-NPs was significantly higher than TMAB-DM1-NPs (P < 0 01). Accumulation of scFv-DM1-NPs in tumor tissue was notably higher than TMAB-DM1-NPs (P < 0 05). scFv-DM1-NPs exhibited improved antitumor effects compared to TMABDM1-NPs (P < 0 05), showing a tumor inhibition rate of more than 70%. Conclusions: ScFvHER2 fragment could serve as a more effective targeting ligand than TMAB, and scFv-DM1-NPs could be developed as a possible drug delivery system to target HER2-positive breast cancer.

Integration of PEGylation and refolding for renaturation of recombinant proteins from insoluble aggregates produced in bacteria—Application to a single-chain Fv fragment

2010 ◽  
Vol 109 (5) ◽  
pp. 447-452 ◽  
Author(s):  
Izumi Kumagai ◽  
Ryutaro Asano ◽  
Takeshi Nakanishi ◽  
Kentaro Hashikami ◽  
Sho Tanaka ◽  
...  
Keyword(s):  
Recombinant Proteins ◽  
Single Chain ◽  
Single Chain Fv ◽  
Single Chain Fv Fragment

Site-Specific Polysialylation of an Antitumor Single-Chain Fv Fragment

2009 ◽  
Vol 20 (5) ◽  
pp. 924-931 ◽  
Author(s):  
A. Constantinou ◽  
A. A. Epenetos ◽  
D. Hreczuk-Hirst ◽  
S. Jain ◽  
M. Wright ◽  
...  
Keyword(s):  
Single Chain ◽  
Site Specific ◽  
Single Chain Fv ◽  
Single Chain Fv Fragment
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