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2018 ; 8
(ä): 198-209
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A Rapamycin-Based GMP-Compatible Process for the Isolation and Expansion of
Regulatory T Cells for Clinical Trials
#MMPMID29552576
Fraser H
; Safinia N
; Grageda N
; Thirkell S
; Lowe K
; Fry LJ
; Scottá C
; Hope A
; Fisher C
; Hilton R
; Game D
; Harden P
; Bushell A
; Wood K
; Lechler RI
; Lombardi G
Mol Ther Methods Clin Dev
2018[Mar]; 8
(ä): 198-209
PMID29552576
show ga
The concept of regulatory T cell (Treg)-based immunotherapy has enormous
potential for facilitating tolerance in autoimmunity and transplantation.
Clinical translation of Treg cell therapy requires production processes that
satisfy the rigors of Good Manufacturing Practice (GMP) standards. In this
regard, we report our findings on the implementation of a robust GMP compliant
process for the ex vivo expansion of clinical grade Tregs, demonstrating the
feasibility of this developed process for the manufacture of a final product for
clinical application. This Treg isolation procedure ensured the selection of a
pure Treg population that underwent a 300-fold expansion after 36 days of
culture, while maintaining a purity of more than 75% CD4(+)CD25(+)FOXP3(+) cells
and a suppressive function of above 80%. Furthermore, we report the successful
cryopreservation of the final product, demonstrating the maintenance of phenotype
and function. The process outlined in this manuscript has been implemented in the
ONE study, a multicenter phase I/IIa clinical trial in which cellular therapy is
investigated in renal transplantation.