1887

Abstract

Enteropathogens are known to disrupt apical actin filaments and/or tight-junction barriers of intestinal epithelial cells to promote infection. In this study, we show that a controlled, cytochalasin-D (Cyto-D)-mediated disruption of actin filaments and tight junctions enhanced the apical delivery of the gene-therapy vector recombinant adeno-associated virus serotype 2 (rAAV2). This increase in transduction efficiency can be attributed to the enhanced delivery of rAAV2 across the Cyto-D disrupted tight junctions, allowing basolateral entry of rAAV2. Previously, we have shown that MG101 and doxorubicin are capable of overcoming proteasome-mediated transduction barriers of rAAV2 in enterocytes. In this study, when Cyto-D was combined with MG101 and doxorubicin in apical delivery of rAAV2 to transduce the differentiated Caco-2 enterocytes, a synergistic >2300-fold increase in transgene expression was achieved. We conclude that Cyto-D is capable of permeating the polarized enterocytes for rAAV2 transduction, which may potentially be a useful device to facilitate intestinal gene transfer via the gut lumen.

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2008-12-01
2019-08-23
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vol. , part 12, pp. 3004 - 3008

Assay of relative mitochondrial activities (an MTS assay) over time against a 4 h Cytochalasin-D (Cyto-D) treatment

Cyto-D-induced actin disintegration decreases the efficiency of rAAV2 transduction of four non-polarized epithelial cellular models [Single PDF file](236 KB)



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