Targeting avian leukosis virus subgroup A vectors by using a TVA-VEGF bridge protein.
Previously, we have demonstrated that bridge proteins comprised of avian leukosis virus (ALV) receptors fused to epidermal growth factor (EGF) can be used to selectively target retroviral vectors with ALV envelope proteins to cells expressing EGF receptors. To determine whether another type of ligand incorporated into an ALV receptor-containing bridge protein can also function to target retroviral infection, the TVA-VEGF110 bridge protein was generated. TVA-VEGF110 consists of the extracellular domain of the TVA receptor for ALV subgroup A (ALV-A), fused via a proline-rich linker peptide to a 110-amino-acid form of vascular endothelial growth factor (VEGF). This bridge protein bound specifically to its cell surface receptor, VEGFR-2, and efficiently mediated the entry of an ALV-A vector into cells. These studies indicate that ALV receptor-ligand bridge proteins may be generally useful tools for retroviral targeting approaches.
Snitkovsky
S
S
Committee on Virology, Boston, Massachusetts 02115, USA.
Niederman
T M
TM
Mulligan
R C
RC
Young
J A
JA
D001354:Avian Leukosis Virus / Q000145:classification / Q000235:genetics* / Q000502:physiology; D030161:Avian Proteins; D016228:Endothelial Growth Factors / Q000235:genetics / Q000502:physiology*; D005822:Genetic Vectors; D008222:Lymphokines / Q000235:genetics / Q000502:physiology*; D020794:Receptor Protein-Tyrosine Kinases / Q000378:metabolism; D017978:Receptors, Growth Factor / Q000378:metabolism; D040262:Receptors, Vascular Endothelial Growth Factor; D011991:Receptors, Virus / Q000235:genetics / Q000502:physiology*; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors
D030161:Avian Proteins; D016228:Endothelial Growth Factors; D008222:Lymphokines; D017978:Receptors, Growth Factor; D011991:Receptors, Virus; C088745:Tva receptor; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors; D020794:Receptor Protein-Tyrosine Kinases; D040262:Receptors, Vascular Endothelial Growth Factor