Nonviral gene delivery with indoleamine 2,3-dioxygenase targeting pulmonary endothelium protects against ischemia-reperfusion injury.
Am J Transplant
; 7(10): 2291-300, 2007 Oct.
Article
em En
| MEDLINE
| ID: mdl-17711549
ABSTRACT
Pulmonary endothelial dysfunction induced by inflammation and inflammation-associated reactive oxygen species is a central component in the pathophysiology of lung transplant ischemia-reperfusion (IR) injury. Indoleamine-2,3-dioxygenase (IDO) is a unique cytosolic enzyme possessing both immune modulating and antioxidant properties. This study investigated whether enhanced pulmonary endothelial IDO activity by a targeted nonviral gene transfer approach ameliorates lung IR injury. Orthotopic syngeneic lung transplants were performed in Lewis rats. A human IDO (hIDO)-expressing plasmid driven by an endothelial cell-specific endothelin-1 promoter was generated and intravenously delivered to donor lung using cationic polymer polyethylenimine. This nonviral gene transfer approach augmented hIDO expression specifically in endothelial cells within lung grafts. Importantly, enhanced IDO activity induced by the hIDO transgene prevented endothelial cell apoptosis, reduced vascular permeability and leukocyte extravasation, and consequently improved graft function and histologic appearance. Furthermore, our in vitro studies showed that increased IDO activity in endothelial cells protected its mitochondrial function and ultrastructure from oxidative stress through stabilization of intracellular redox status. The approach used in these experiments has properties that could eliminate the inherent side effects associated with viral vectors and/or antibody-directed targeted therapy, and thus may represent a potential therapeutic strategy against lung IR injury in patients.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Endotélio Vascular
/
Traumatismo por Reperfusão
/
Circulação Pulmonar
/
Transplante de Pulmão
/
Indolamina-Pirrol 2,3,-Dioxigenase
Limite:
Animals
Idioma:
En
Revista:
Am J Transplant
Assunto da revista:
TRANSPLANTE
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Estados Unidos