Generation, cryopreservation, function and in vivo persistence of ex vivo expanded cynomolgus monkey regulatory T cells

Cellular Immunology
Hao GuoA W Thomson

Abstract

We expanded flow-sorted Foxp3(+) cynomolgus monkey regulatory T cells (Treg) >1000-fold after three rounds of stimulation with anti-CD3 mAb-loaded artificial antigen-presenting cells, rapamycin (first round only) and IL-2. The expanded Treg maintained their expression of Treg signature markers, CD25, CD27, CD39, Foxp3, Helios, and CTLA-4, as well as CXCR3, which plays an important role in T cell migration to sites of inflammation. In contrast to expanded effector T cells (Teff), expanded Treg produced minimal IFN-γ and IL-17 and no IL-2 and potently suppressed Teff proliferation. Following cryopreservation, thawed Treg were less viable than their freshly-expanded counterparts, although no significant changes in phenotype or suppressive ability were observed. Additional rounds of stimulation/expansion restored maximal viability. Furthermore, adoptively-transferred autologous Treg expanded from cryopreserved second round stocks and labeled with CFSE or VPD450 were detected in blood and secondary lymphoid tissues of normal or immunosuppressed recipients at least two months after their systemic infusion.

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Citations

Aug 21, 2015·Expert Review of Clinical Immunology·Madeline FryerGerald Brandacher
Dec 25, 2015·American Journal of Transplantation : Official Journal of the American Society of Transplantation and the American Society of Transplant Surgeons·M B EzzelarabA W Thomson
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Nov 13, 2019·American Journal of Transplantation : Official Journal of the American Society of Transplantation and the American Society of Transplant Surgeons·Alberto Sánchez-FueyoGiovanna Lombardi
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Jul 3, 2021·Frontiers in Cell and Developmental Biology·Angus W ThomsonMohamed B Ezzelarab

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