Enhanced Vascular Biocompatibility and Remodeling of Decellularized and Secured Xenogeneic/Allogeneic Matrices in a Porcine Model.
Eur Surg Res
; 59(1-2): 58-71, 2018.
Article
em En
| MEDLINE
| ID: mdl-29621750
ABSTRACT
BACKGROUND/PURPOSE:
Calcifications and absence of growth potential are the major drawbacks of glutaraldehyde-treated prosthesis. Decellularized and secured xeno-/allogeneic matrices were assessed in a preclinical porcine model for biocompatibility and vascular remodeling in comparison to glutaraldehyde-fixed bovine pericardium (GBP; control).METHODS:
Native human (fascia lata, pericardium) and porcine tissues (peritoneum) were used and treated. In vitro, biopsies were performed before and after treatment to assess decellularization (hematoxylin and eosin/DAPI). In vivo, each decellularized and control tissue sample was implanted subcutaneously in 4 mini-pigs. In addition, 9 mini-pigs received a patch or a tubularized prosthesis interposition on the carotid artery or abdominal aorta of decellularized (D) human fascia lata (DHFL; n = 4), human pericardium (DHP; n = 9), porcine peritoneum (DPPt; n = 7), and control tissue (GBP n = 3). Arteries were harvested after 1 month and subcutaneous samples after 15-30 days. Tissues were processed for hematoxylin and eosin/von Kossa staining and immunohistochemistry for CD31, alpha-smooth muscle actin, CD3, and CD68. Histomorphometry was achieved by point counting.RESULTS:
A 95% decellularization was confirmed for DHP and DPPt, and to a lower degree for DHFL. In the subcutaneous protocol, CD3 infiltration was significantly higher at day 30 in GBP and DHFL, and CD68 infiltration was significantly higher for GBP (p < 0.05). In intravascular study, no deaths, aneurysms, or pseudoaneurysms were observed. Inflammatory reaction was significantly higher for DHFL and GBP (p < 0.05), while it was lower and comparable for DHP/DPPt. DHP and DPPt showed deeper recellularization, and a new arterial wall was characterized.CONCLUSIONS:
In a preclinical model, DPPt and DHP offered better results than conventional commercialized GBP for biocompatibility and vascular remodeling.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Transplante Heterólogo
/
Prótese Vascular
/
Remodelação Vascular
Tipo de estudo:
Guideline
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Eur Surg Res
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Bélgica