@article {62795,
	title = {Developing in vitro expanded CD45RA+ regulatory T cells as an adoptive cell therapy for Crohn{\textquoteright}s disease},
	journal = {GutGut},
	volume = {65},
	number = {4},
	year = {2016},
	note = {Canavan, James BScotta, CristianoVossenkamper, AnnaGoldberg, RimmaElder, Matthew JShoval, IritMarks, EllenStolarczyk, EmilieLo, Jonathan WPowell, NickFazekasova, HenrietaIrving, Peter MSanderson, Jeremy DHoward, Jane KYagel, SimchaAfzali, BehdadMacDonald, Thomas THernandez-Fuentes, Maria PShpigel, Nahum YLombardi, GiovannaLord, Graham MENG88245/Medical Research Council/United KingdomG0802068/Medical Research Council/United KingdomRG/13/12/30395/British Heart Foundation/United KingdomMR/J006742/1/Medical Research Council/United KingdomMR/K025538/1/Medical Research Council/United KingdomG0801537/ID/Medical Research Council/United KingdomMR/M003493/1/Medical Research Council/United KingdomWT088747MA/Wellcome Trust/United KingdomMR/K002996/1/Medical Research Council/United KingdomG0801537/Medical Research Council/United Kingdom091009/Wellcome Trust/United KingdomResearch Support, Non-U.S. Gov{\textquoteright}tEngland2015/02/26 06:00Gut. 2016 Apr;65(4):584-94. doi: 10.1136/gutjnl-2014-306919. Epub 2015 Feb 24.},
	month = {Apr},
	pages = {584-94},
	abstract = {BACKGROUND AND AIM: Thymus-derived regulatory T cells (Tregs) mediate dominant peripheral tolerance and treat experimental colitis. Tregs can be expanded from patient blood and were safely used in recent phase 1 studies in graft versus host disease and type 1 diabetes. Treg cell therapy is also conceptually attractive for Crohn{\textquoteright}s disease (CD). However, barriers exist to this approach. The stability of Tregs expanded from Crohn{\textquoteright}s blood is unknown. The potential for adoptively transferred Tregs to express interleukin-17 and exacerbate Crohn{\textquoteright}s lesions is of concern. Mucosal T cells are resistant to Treg-mediated suppression in active CD. The capacity for expanded Tregs to home to gut and lymphoid tissue is unknown. METHODS: To define the optimum population for Treg cell therapy in CD, CD4(+)CD25(+)CD127(lo)CD45RA(+) and CD4(+)CD25(+)CD127(lo)CD45RA(-) Treg subsets were isolated from patients{\textquoteright} blood and expanded in vitro using a workflow that can be readily transferred to a good manufacturing practice background. RESULTS: Tregs can be expanded from the blood of patients with CD to potential target dose within 22-24 days. Expanded CD45RA(+) Tregs have an epigenetically stable FOXP3 locus and do not convert to a Th17 phenotype in vitro, in contrast to CD45RA(-) Tregs. CD45RA(+) Tregs highly express alpha4beta7 integrin, CD62L and CC motif receptor 7 (CCR7). CD45RA(+) Tregs also home to human small bowel in a C.B-17 severe combined immune deficiency (SCID) xenotransplant model. Importantly, in vitro expansion enhances the suppressive ability of CD45RA(+) Tregs. These cells also suppress activation of lamina propria and mesenteric lymph node lymphocytes isolated from inflamed Crohn{\textquoteright}s mucosa. CONCLUSIONS: CD4(+)CD25(+)CD127(lo)CD45RA(+) Tregs may be the most appropriate population from which to expand Tregs for autologous Treg therapy for CD, paving the way for future clinical trials.},
	keywords = {*Adoptive Transfer, Animals, Antigens, CD45/immunology, Cell- and Tissue-Based Therapy/*methods, Crohn Disease/immunology/*therapy, DNA Methylation, Enzyme-Linked Immunosorbent Assay, Forkhead Transcription Factors/genetics, Humans, Ibd, Ibd basic research, Ibd clinical, Immunotherapy, In Vitro Techniques, Interleukin-17/metabolism, Intestinal t cells, Mice, Mice, SCID, Phenotype, Polymerase Chain Reaction, T-Lymphocytes, Regulatory/*immunology, Transplantation, Heterologous},
	isbn = {1468-3288 (Electronic)0017-5749 (Linking)},
	author = {Canavan, J. B. and Scotta, C. and Vossenkamper, A. and Goldberg, R. and Elder, M. J. and Shoval, I. and Marks, E. and Stolarczyk, E. and Lo, J. W. and Powell, N. and Fazekasova, H. and Irving, P. M. and Sanderson, J. D. and Howard, J. K. and Yagel, S. and Afzali, B. and MacDonald, T. T. and Hernandez-Fuentes, M. P. and Shpigel, N. Y. and Lombardi, G. and Lord, G. M.}
}
