The effects of CTLA-4Ig on acute lung allograft rejection: a comparison of intrabronchial gene therapy with systemic administration of protein.
Transplantation
; 71(12): 1867-71, 2001 Jun 27.
Article
en En
| MEDLINE
| ID: mdl-11455274
BACKGROUND: Blockade of T-cell costimulation by local delivery of an adenoviral vector encoding for CTLA-4Ig and systemic administration of the protein are compared in a rat lung allograft model. METHODS: Left lungs of Brown Norway rats (RT1n) were transplanted into Lewis (RT11) recipients in four groups of six animals each: 1) no treatment; 2) intrabronchial transduction of donor lung with adenovirus encoding mCTLA-4Ig (adeno-mCTLA-4Ig); 3) intrabronchial transduction with empty adenovirus; and 4) intraperitoneal injection of mCTLA-4Ig. Grading of rejection, mCTLA-4Ig measurement in serum and bronchial washings, RT-PCR for virally encoded transcripts, and immunohistochemistry for mCTLA-4Ig were carried out 4 days later. RESULTS: Intrabronchial transduction with adeno-mCTLA-4Ig resulted in detectable transgene expression in graft tissue and bronchial fluid but not in serum. Significant reduction in rejection grade (from grade 3 to 2) occurred after systemic mCTLA-4Ig but not adeno-mCTLA-4Ig transduction. CONCLUSION: Local expression of immunomodulatory proteins can be achieved within lung allografts by intrabronchial delivery of adenoviral vector but may not significantly modify acute rejection.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Terapia Genética
/
Antígenos de Diferenciación
/
Trasplante de Pulmón
/
Inmunoconjugados
/
Rechazo de Injerto
Límite:
Animals
Idioma:
En
Revista:
Transplantation
Año:
2001
Tipo del documento:
Article
Pais de publicación:
Estados Unidos