Rapamycin-conditioned dendritic cells activated with monophosphoryl lipid-A promote allograft acceptance in vivo

Javier Campos-Acuña, Francisco Pérez, Edgar Narváez, Mauricio Campos-Mora, Tania Gajardo, Diego Catalán, Juan C. Aguillón, Karina Pino-Lagos

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Aim: To date, there is no human dendritic cell (DC) based therapy to prevent allograft rejection in transplanted patients. Here, we evaluate a potential protocol using a murine in vivo transplant model. Materials & methods: We generated murine bone marrow-derived DCs (BM-DCs), modulated with rapamycin (Rapa) and activated with monophosphoryl lipid A (Rapamycin-treated and monophosphoryl lipid A-matured DCs [Rapa-mDCs]). DCs phenotype was evaluated by flow cytometry, cytokine production by ELISA and their T-cell stimulatory ability was tested in co-cultures with CD4+ T cells. Using an in vivo skin graft model, we evaluated DCs tolerogenicity. Results: In vitro, Rapa-mDCs exhibit a semi-mature phenotype given by intermediate levels of co-stimulatory molecules and cytokines, and inhibit CD4+ T-cell proliferation. In vivo, skin-grafted mice treated with Rapa-mDCs show high allograft survival, accumulation of Foxp3+ Tregs and cytokine pattern modification. Conclusion: Rapa-mDCs re-educate the inflammatory microenvironment, promoting skin-allograft survival.
Original languageAmerican English
Pages (from-to)101-110
Number of pages10
JournalImmunotherapy
Volume7
Issue number2
DOIs
StatePublished - 1 Jan 2015
Externally publishedYes

Keywords

  • cellular therapy
  • dendritic cells
  • regulatory T cells
  • tolerance

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