Proliferation of genetically modified human cells on electrospun nanofiber scaffolds.
MOLECULAR THERAPY-NUCLEIC ACIDS 2012;
1:e59. [PMID:
23212298 PMCID:
PMC3530926 DOI:
10.1038/mtna.2012.51]
[Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Gene editing is a process by which single base mutations can be corrected, in the context
of the chromosome, using single-stranded oligodeoxynucleotides (ssODNs). The survival and
proliferation of the corrected cells bearing modified genes, however, are impeded by a
phenomenon known as reduced proliferation phenotype (RPP); this is a barrier to practical
implementation. To overcome the RPP problem, we utilized nanofiber scaffolds as templates
on which modified cells were allowed to recover, grow, and expand after gene editing.
Here, we present evidence that some HCT116-19, bearing an integrated, mutated enhanced
green fluorescent protein (eGFP) gene and corrected by gene editing, proliferate on
polylysine or fibronectin-coated polycaprolactone (PCL) nanofiber scaffolds. In contrast,
no cells from the same reaction protocol plated on both regular dish surfaces and
polylysine (or fibronectin)-coated dish surfaces proliferate. Therefore, growing
genetically modified (edited) cells on electrospun nanofiber scaffolds promotes the
reversal of the RPP and increases the potential of gene editing as an ex vivo
gene therapy application.
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