Production and characterization of a recombinant single-chain antibody against Hantaan virus envelop glycoprotein.

Abstract

Hantaan virus (HTNV) is the type of Hantavirus causing hemorrhagic fever with renal syndrome, for which no specific therapeutics are available so far. Cell type-specific internalizing antibodies can be used to deliver therapeutics intracellularly to target cell and thus, have potential application in anti-HTNV infection. To achieve intracellular delivery of therapeutics, it is necessary to obtain antibodies that demonstrate sufficient cell type-specific binding, internalizing, and desired cellular trafficking. Here, we describe the prokaryotic expression, affinity purification, and functional testing of a single-chain Fv antibody fragment (scFv) against HTNV envelop glycoprotein (GP), an HTNV-specific antigen normally located on the membranes of HTNV-infected cells. This HTNV GP-targeting antibody, scFv3G1, was produced in the cytoplasm of Escherichia coli cells as a soluble protein and was purified by immobilized metal affinity chromatography. The purified scFv possessed a high specific antigen-binding activity to HTNV GP and HTNV-infected Vero E6 cells and could be internalized into HTNV-infected cells probably through the clathrin-dependent endocytosis pathways similar to that observed with transferrin. Our results showed that the E. coli-produced scFv had potential applications in targeted and intracellular delivery of therapeutics against HTNV infections.

• Authors: Jie Yang, Rui Chen, Junxia Wei, Fanglin Zhang, Yong Zhang, Lintao Jia, Yan Yan, Wen Luo, Yunxin Cao, Libo Yao, Jifeng Sun, Zhikai Xu, Angang Yang
• Journal: Applied microbiology and biotechnology (Appl Microbiol Biotechnol) Vol. 86 Issue 4 Pg. 1067-75 (Apr 2010) ISSN: 1432-0614 [Electronic] Germany
• PMID: 20012277 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Recombinant Proteins
• Single-Chain Antibodies
• Viral Envelope Proteins

Topics

• Amino Acid Sequence
• Animals
• Base Sequence
• Chlorocebus aethiops
• Chromatography, Affinity
• Endocytosis
• Escherichia coli (genetics)
• Hantaan virus (immunology)
• Molecular Sequence Data
• Protein Binding
• Recombinant Proteins (genetics, immunology, metabolism)
• Sequence Analysis, DNA
• Single-Chain Antibodies (genetics, immunology, metabolism)
• Vero Cells
• Viral Envelope Proteins (immunology)