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Cir Cir ; 88(5): 554-561, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33064706

RESUMO

OBJECTIVE: The objective of the study was to show adipose tissue-derived mesenchymal stem cells (AD-MSCs) immunomodulatory effects in small bowel transplantation (SBTx). MATERIALS AND METHODS: Forty Wistar Han rats (age: 10-12 weeks): were allogenic receptor rats and were allotted in 2 groups. Control group: rats undergoing orthopic SBTx ; AD-MSCs group: rats undergoing orthotopic SBTx plus AD-MSCs. Male Lewis rats were allogeneic small bowel donors. Rejection was confirmed by histological study of the explanted intestine, enterocyte apoptosis was determined in crypts and the lamina propria of the small bowel. Cytokine concentration levels (enzyme-linked immunosorbent assay) (interleukin [IL]-4, IL-10, IL-12, IL-17, IL-21, IL-23, tumor necrosis factor-alpha, and transforming growth factor [TGF]-b1) and cell percentages (flow cytometry) (CD3+ CD4+, CD8+, CD4+/25+, CD8+/25+, CD4+/25+/Foxp3+, and CD8+/25+/Foxp3+) were assessed in peripheral blood preoperatively and after death. RESULTS: Treatment with AD-MSCs produced a significantly lower risk of rejection in the first 7 post-operative days (five rejection cases among 20 rats in the control group and only one case in the AD-MSCs group). Treg cells and TGFb1 levels showed a significant increase in the AD-MSCs group. CONCLUSIONS: The local implantation of AD-MSC in the anastomosis and the intestinal lumen can induce a regulatory immune response, by increasing the percentages of Treg cells and TGb-1 levels, leading to a lower risk of acute rejection by cell mediation, in the first 7 days of the intestinal transplant. We think that the implantation of AD-MSCs, in the anastomoses and in the lumen of the donor intestine, could give rise to a chimera of donor-recipient cells.


OBJETIVO: Mostrar el efecto inmunomodulador de las células madre mesenquimales (AD-MSCs) en el trasplante de intestino delgado (SBTx). MÉTODO: 40 ratas Wistar Han (edad: 10-12 semanas): grupo control (SBTx) y grupo AD-MSCs (SBTx + AD-MSCs implantadas en las anastomosis distal y proximal del intestino delgado y en la luz intestinal). El intestino delgado provino de ratas Lewis. El rechazo se confirmó histológicamente. Se estudió la apoptosis de los enterocitos en las criptas y en la lámina propia del intestino delgado. Se determinaron por ELISA las citocinas (IL-4, IL-10, IL-12, IL-17, IL-21, IL-23, TNF-α, TGF-b1) en sangre periférica y por citometría de flujo los porcentajes celulares (CD3+ CD4+, CD8+, CD4+/25+, CD8+/25+, CD4+/25+/Foxp3+, CD8+/25+/Foxp3+) en el preoperatorio y después de la muerte. RESULTADOS: El empleo de AD-MSCs se asoció a una disminución significativa del riesgo de rechazo en los primeros 7 días posoperatorios (cinco casos de rechazo de 20 ratas en el grupo control y un solo caso en el grupo AD-MSCs). Las células Treg y los valores de TGFb1 mostraron un incremento significativo en el grupo AD-MSCs. CONCLUSIONES: El implante local de AD-MSCs en las anastomosis del trasplante de intestino delgado podría disminuir el rechazo celular agudo. Pensamos que la implantación de AD-MSCs, en las anastomosis y en el lumen del intestino donante, podría dar lugar a un quimera de células donante-receptor.


Assuntos
Rejeição de Enxerto , Transplante de Células-Tronco Mesenquimais , Células-Tronco Mesenquimais , Animais , Rejeição de Enxerto/prevenção & controle , Masculino , Ratos , Ratos Endogâmicos Lew , Ratos Wistar , Linfócitos T Reguladores
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