Further evidence for sustained systemic inflammation in xenograft recipients (SIXR).
Xenotransplantation
; 22(5): 399-405, 2015.
Article
em En
| MEDLINE
| ID: mdl-26292982
ABSTRACT
INTRODUCTION:
In pig-to-baboon heart/artery patch transplantation models, adequate costimulation blockade prevents a T-cell response. After heart transplantation, coagulation dysfunction (thrombocytopenia, reduced fibrinogen, increased D-dimer) and inflammation (increased C-reactive protein [CRP]) develop. We evaluated whether coagulation dysfunction and/or inflammation can be detected following pig artery patch transplantation.METHODS:
Baboons received heart (n = 8) or artery patch (n = 16) transplants from genetically engineered pigs and a costimulation blockade-based regimen. Heart grafts functioned for 15-130 days. Artery recipients were euthanized after 28-84 days. Platelet counts, fibrinogen, D-dimer, and CRP were measured.RESULTS:
Thrombocytopenia and reduced fibrinogen developed only in recipients of hearts not expressing a coagulation-regulatory protein (n = 4), but not in other heart or patch recipients. However, in heart recipients (n = 8), there were sustained increases in D-dimer (<0.5 to 1.9 ug/ml [P < 0.01]) and CRP (0.26-2.2 mg/dl [P < 0.01]). In recipients of artery patches, there were also sustained increases in D-dimer (<0.5 to 1.4 ug/ml [P < 0.01]) and CRP (0.26 to 1.5 mg/dl [P < 0.001]). An IL-6R antagonist suppressed the increase in CRP, but not D-dimer.CONCLUSION:
The pig artery patch model has proved valuable for determining immunosuppressive regimens that prevent sensitization to pig antigens. This model also provides information on the sustained systemic inflammation in xenograft recipients (SIXR). An IL-6R antagonist may help suppress this response.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Complicações Pós-Operatórias
/
Artérias
/
Transplante Heterólogo
/
Transplante de Coração
/
Rejeição de Enxerto
/
Inflamação
Tipo de estudo:
Etiology_studies
/
Evaluation_studies
Limite:
Animals
Idioma:
En
Revista:
Xenotransplantation
Assunto da revista:
TRANSPLANTE
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Estados Unidos