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Reprogrammed quiescent B cells provide an effective cellular therapy against chronic experimental autoimmune encephalomyelitis.

Abstract : Activated B cells can regulate immunity, and have been envisaged as potential cell-based therapy for treating autoimmune diseases. However, activated human B cells can also propagate immune responses, and the effects resulting from their infusion into patients cannot be predicted. This led us to consider resting B cells, which in contrast are poorly immunogenic, as an alternative cellular platform for the suppression of unwanted immunity. Here, we report that resting B cells can be directly engineered to express antigens in a remarkably simple, rapid, and effective way with lentiviral vectors. Notably, this neither required nor induced activation of the B cells. With that approach we were able to produce reprogrammed resting B cells that inhibited antigen-specific CD4(+) T cells, CD8(+) T cells, and B cells upon adoptive transfer in mice. Furthermore, resting B cells engineered to ectopically express myelin oligodendrocyte glycoprotein antigen protected recipient mice from severe disability and demyelination in experimental autoimmune encephalomyelitis, and even induced complete remission from disease in mice lacking functional natural regulatory T cells, which otherwise developed a chronic paralysis. In conclusion, our study introduces reprogrammed quiescent B cells as a novel tool for suppressing undesirable immunity.
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https://hal-pasteur.archives-ouvertes.fr/pasteur-00590827
Contributor : Mireille Gau <>
Submitted on : Thursday, May 5, 2011 - 11:19:48 AM
Last modification on : Wednesday, September 16, 2020 - 4:57:51 PM

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Elisabeth Calderón-Gómez, Vicky Lampropoulou, Ping Shen, Patricia Neves, Toralf Roch, et al.. Reprogrammed quiescent B cells provide an effective cellular therapy against chronic experimental autoimmune encephalomyelitis.. European Journal of Immunology, Wiley-VCH Verlag, 2011, epub ahead of print. ⟨10.1002/eji.201041041⟩. ⟨pasteur-00590827⟩

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