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Updated: Jul 24, 2026

Engineering Cell-permeable Protein
Published on: December 28, 2009
Transient correction of genetic defects in cultured animal cells by introduction of functional proteins
D Ortiz1, M M Baldwin, J J Lucas
1Department of Molecular and Cellular Biology, National Jewish Center for Immunology and Respiratory Medicine, Denver, Colorado 80206.
Abstract:
Material was introduced into cultures of cells by using the method of scrape loading, in which cells are simply rubbed from the surface of a plastic tissue culture dish by a rubber-tipped rod in the presence of a macromolecule of interest. The volume of solution introduced into cells was comparable to that generally injected in the direct microinjection method with glass capillaries, that is, about 50 to 100 fl per cell. Genetic defects (lack of hypoxanthine-guanine phosphoribosyltransferase and thymidine kinase) in several cell lines were transiently corrected by scraping the cells in the presence of crude cell extracts prepared from wild-type cells.
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