Inventors:
Maria Croyle - Austin TX
James M. Wilson - Gladwyne PA
Assignee:
The Trustees of the University of Pennsylvania - Philadelphia PA
International Classification:
C12N 15861
US Classification:
435456, 4353201, 435455, 435457, 4352351, 435243, 435247, 435250, 435260, 424 932, 424 931, 424 936
Abstract:
A rapid method for modifying a viral capsid or envelope protein with a polyethylene glycol (PEG) is described. Also provided are methods of delivering a molecule using the PEG-modified viruses of the invention. Compositions containing the PEG-modified viruses of the invention, are characterized by improved gene expression, reduced neutralizing antibody and CTL production. Also provided are viral compositions having enhanced physical stability, in which the viruses are lyophilized in a formulation having a 1:1 ratio of sucrose and mannitol are provided.