Regulatory T cells promote myelin regeneration in the central nervous system (original) (raw)
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Acknowledgements
We thank A. Rudensky (Memorial Sloan Kettering Cancer Centre) for providing Foxp3-DTR mice and B. Malissen (Aix Marseille Université) for the provision of Foxp3-eGFP mice. We acknowledge extensive technical support from S. Leech, S. Peoples, N. de la Vega Gallardo, S. Mitchell, J. Brown, R. Blain and the staff of the animal facility. This work was supported by the Biotechnology and Biological Sciences Research Council (BB/J01026X/1 and BB/N003721/1, to D.C.F.), The Leverhulme Trust (ECF-2014-390, to Y.D.), QUB (QUB - Lucy McGuigan Bequest, to D.C.F.), The UK Multiple Sclerosis Society (941 and 50, to R.J.M.F. and C.Z.), MRC UK Regenerative Medicine platform (MR/KO26666/1, to A.C.W.), University of Edinburgh Wellcome Trust Multi User Equipment Grant (WT104915MA, to A.C.W.), by a core support grant from the Wellcome Trust and MRC to the Wellcome Trust - Medical Research Council Cambridge Stem Cell Institute (097922/Z/11/Z to R.J.M.F.), studentship support from Dept. for the Economy (Northern Ireland) and British Pathological Society, US National Multiple Sclerosis Society (RG5203A4, to J.R.C.), NIH/NINDS (NS095889, to J.R.C.), NIH/NIGMS IRACDA Postdoctoral Fellowship (K12GM081266, to S.R.M.) and Wellcome Trust (110138/Z/15/Z, to D.C.F.).
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Authors and Affiliations
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Northern Ireland, UK
Yvonne Dombrowski, Thomas O'Hagan, Marie Dittmer, Rosana Penalva, Samara Fleville, George Eleftheriadis, Michelle Naughton, Rachel Hassan, Jill Moffat, John Falconer, Ingrid V Allen, Adrien Kissenpfennig, Paul N Moynagh, Rebecca J Ingram & Denise C Fitzgerald - Department of Neurology and Program in Neurosciences, University of California, San Francisco, California, USA
Sonia R Mayoral & Jonah R Chan - Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Northern Ireland, UK
Peter Bankhead, Peter Hamilton & Emma Evergren - Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, Clifford Allbutt Building, Cambridge Biomedical Campus, University of Cambridge, UK
Chao Zhao & Robin J M Franklin - Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, UK
Amanda Boyd & Anna C Williams - Department of Biology, Institute of Immunology, National University of Ireland Maynooth, Ireland
Paul N Moynagh - Université Côte d'Azur, CNRS, GREDEG, Nice, France
Bernard Perbal - International CCN Society, Paris, France
Bernard Perbal
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Contributions
Experiments were designed, performed and analyzed by Y.D., T.O.H., M.D., R.P., S.R.M., S.F., M.N., G.E., J.M., J.F., I.V.A., J.R.C. and D.C.F. Image analysis tools were developed by P.B. and P.H. EM was performed and analyzed by E.E., A.B. and A.C.W. C.Z., R.H., A.K., P.N.M., B.P., R.J.I., J.R.C. and R.J.M.F. provided advice on experimental design and interpretation, and I.V.A., P.M. and R.J.M.F. provided mentorship. Manuscript was written by Y.D. and D.C.F. with contributions from all authors. D.C.F. oversaw the study.
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Correspondence toDenise C Fitzgerald.
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Integrated supplementary information
Supplementary Figure 1 Immunophenotyping and oligodendroglial analysis following lysolecithin- and cuprizone-induced demyelination
(a-d) Representative images of flow cytometric analysis of (a) CD3+ T cells, (b) CD4+ T cells and (c,d) CD3+CD4+Foxp3+ Treg, in lesional spinal cord tissue at 3 d.p.l. gated on (a,b) CD45+ cells, (c) CD45+CD3+ and (d) CD45+CD3+CD4+ cells. (e) Quantitative immunophenotyping of T cell populations in matched healthy and lesioned spinal cord harvested at 3 and 11 d.p.l., gated on CD45+ cells. n = 4 mice per group. Healthy vs. lesion on 3 d.p.l. on left panel: (CD3+, U = 0, P = 0.0286), (CD4+, U = 0, P = 0.0286), (CD4+Foxp3+, U = 0, P = 0.0294). Healthy vs. lesion on 11 d.p.l. on right panel: (CD3+, U = 2, P = 0.1143), (CD4+, U = 0, P = 0.0286), (CD4+Foxp3+, U = 0, P = 0.0294), all two-tailed Mann Whitney U tests. (f) Representative flow cytometric analysis of Foxp3+ Treg cells in fresh spleen from DT-treated C57BL/6 (control) and Foxp3-DTR mice (- Treg) at 14 d.p.l., gated on CD4+ cells. (g) Olig2+Ki67+ cells per lesion area in spinal cord of Foxp3-DTR mice at 10 d.p.l. with n = 8 animals in control and n = 7 animals in Treg-depleted groups. (t = 1.580, d.f. = 13, P = 0.1382, unpaired two-tailed Student’s t test). (h) CC1+Olig2+ cells per lesion area at 10 d.p.l. in spinal cord of mice, with Treg depletion restricted to pre-lesioning phase, with n=3 animals in control and n=4 animals in Treg-depleted groups. (U = 6, P > 0.9999, two-tailed Mann Whitney U test). (i) Immunohistochemical analysis of CC1+Olig2+ cells per lesion area of the corpus callosum at 10 days post-cuprizone withdrawal. n = 5 animals for C57BL/6 DT-treated controls, n = 4 animals for saline-treated Foxp3-DTR controls, n = 5 animals for Treg-depleted Foxp3-DTR group; data represent analysis of 2-4 regions of corpus callosum per animal (C57BL/6+DT vs FoxP3-DTR+DT: t = 0.8753, d.f. = 8, P = 0.4069, unpaired two-tailed Student’s t test; FoxP3-DTR+saline vs FoxP3-DTR+DT: U = 6, P = 0.4127, two-tailed Mann Whitney U test). (j) Plp1 expression analysis in cerebellar tissue of control and Treg-depleted animals at 14 days post-cuprizone withdrawal by qPCR (left panel, normalized to Gapdh) and by in situ hybridization in corpus callosum (right panel, representative images). n = 5 animals (control) and n = 6 animals in Treg-depleted group (t = 8.684, d.f. = 9, P < 0.0001, unpaired two-tailed Student’s t test). (k) Immunohistochemical analysis of total Olig2+ cells per lesion area in the corpus callosum at 10 and 14 days post-cuprizone withdrawal. n = 6 animals (control), n = 4 animals (demyelination and 10 days control remyelination group), n=5 (all other remyelination groups); data represent analysis of 2-4 regions of corpus callosum per animal (10 days remyelination: U = 5, P = 0.2857, two-tailed Mann Whitney U test; 14 days remyelination: t = 1.701, d.f. = 8, P = 0.1273, unpaired two-tailed Student’s t test). Data shown are representative of at least 3 (a-d, f), 2 (e, left panel) or 1 (e, right panel, g-k) independent experiments. Data presented with mean values indicated, error bars = SEM, *P<0.05, ***P<0.001.
Supplementary Figure 2 Treg and Treg-conditioned media promote brain slice myelination and remyelination
(a) Schematic diagram and 3D image of Foxp3-eGFP+ Treg in organotypic brain slice cultures representing z-stack images at 3 d.i.v. (scale bar = 100 μm, green = eGFP). (b,c) Analysis of (b) MBP+ cells per FOV and (c) myelination index (NF200+MBP+) of brain stem slices with or without Treg cells at 3 d.i.v., Control: MBP+ counts n = 25 FOV and myelination index n = 24 FOV. Treg: MBP+ counts n = 15 and myelination index n = 15 FOV. Fields of view were selected from 3-6 slices/group (MBP+ counts: t = 3.058, d.f. = 38, P = 0.0041; myelination index: t = 3.146, d.f. = 37, P = 0.0033, unpaired, two-tailed, Student’s t test). (d) Representative images of brain slices from (b, c) taken from a z-stack image (scale bar = 100 μm, green = NF200, red = MBP). (e) Analysis of myelination index (NF200+MBP+) of brain stem slices with Treg or Tconv cells at 3 d.i.v. Tconv n = 15 FOV and Treg n = 14 FOV from 3-6 slices per group (U = 26, P = 0.0006, two-tailed Mann-Whitney U test). (f) Representative flow cytometric analysis of non-polarized (NP) T cells and Treg after reactivation for 72h, FSC = Forward Scatter. (g) Analysis of myelination index (NF200+MBP+) of brain stem slices treated with non-polarized (NP) or Treg-conditioned media, at 7 d.i.v. NP n= 14 FOV and Treg n = 15 FOV from 3-6 slices per group (t = 4.559, d.f. = 27, P < 0.0001, unpaired two-tailed Student’s t test). (h-j) Electron microscopic analysis of control (non-demyelinated; M) and remyelinating (RM) brain slices with and without Treg-conditioned medium, n = 3 slices/condition, scale bar = 2 μm (number of myelinated fibres: F(2,6) = 22.89, P = 0.0016; g-ratio: F(2,6) = 5.915, P = 0.0381, one-way ANOVA with Bonferroni post hoc test). Number of myelinated fibres: F = 22.89, Rsquare = 0.8841,C(M) v C(RM) t = 6.592, C(M) v Treg t = 1.978, C(RM) v Treg t = 4.614, P = 0.0016. g-ratio: F = 5.915, R square = 0.6635, C(M) v C(RM) t = 3.344, C(M) v Treg (RM) t = 2.370, p = 0.0381. (k) ELISA of IL-6 in brain slice culture-conditioned media up to day 6 in vitro. n = 4 wells, each from an independent experiment. Data shown are representative of at least 2 (a-e, g) 7 (f) or 1 (h-j) independent experiments. Data presented with mean values indicated, error bars = SEM, *P<0.05, ** P <0.01, *** P <0.001.
Supplementary Figure 3 Treg promote oligodendrocyte differentiation in mixed glia but do not affect OPC survival in the steady state
(a) Immunofluorescence analysis of OPC (green = Olig2, red = Ki67, first row), oligodendrocyte (green = Olig2, red = MBP, second row), astrocyte (green = GFAP, third row) and microglial (red = CD11b, last row) markers after 1 week of mixed glial culture. Blue = DAPI. Left panels depict a stitched image of the well of a 96-well plate (stitched images were taken at 10x) (scale bars from left to right panels = 500 μm, 100 μm, 50 μm). (b, c) Immunofluorescence analysis of MBP+ percentage area (Control vs Treg: U = 4, P = 0.026; Non-Polarized (NP) vs Treg: U = 1, P = 0.0043, two-tailed Mann-Whitney U test) and (c) representative images of mixed glial cultures after 5 days of indicated treatment, n=6, (scale bar = 100 μm, green = Olig2, red = MBP). (d) Immunofluorescence analysis of MBP+ area of mixed glial cultures after 5 days in the presence of Treg-conditioned media prepared from total, or naïve, CD4+ T cells, n = 5 (Control vs Treg: t = 9.786, d.f. = 8, P < 0.0001; control vs naïve Treg: t = 8.644, d.f. = 8, P < 0.0001; Treg vs naïve Treg: t = 1.079, d.f. = 8, P = 0.3119, unpaired two-tailed Student’s t test). (e,f) Immunofluorescence analysis of EthD-1+ cell numbers, n = 5, (U = 10, P = 0.6752, Mann Whitney U test) and (f) representative images of mixed glial cultures (scale bar = 100 μm, green = calcein, red = EthD-1). Data representative of (b) 3 and (d,e) 2 independent experiments. Data presented with mean values indicated, error bars = SEM, * P<0.05, ** P<0.01.
Supplementary Figure 4 Identification of CCN3 as a mediator of Treg-induced oligodendrocyte differentiation
(a) Semi-quantitative proteome profiler analysis of non-polarized (NP) and Treg-conditioned media (2 independent batches) compared to cell culture medium only. (b) Representative immunofluorescence images of mixed glial cultures stained for Olig2+MBP+ cells and analyzed quantitatively in (Figure 4d) (Green = Olig2, red = MBP, scale bar = 100 μm). (c) Schematic diagram of CCN3 depletion and elution from Treg-conditioned media. (d) ELISA confirmation of CCN3 depletion from Treg-conditioned media n = 2. Data representative of 1 (a, with 2 independently generated batches), or at least 3 (b, d) biologically independent experiments.
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Dombrowski, Y., O'Hagan, T., Dittmer, M. et al. Regulatory T cells promote myelin regeneration in the central nervous system.Nat Neurosci 20, 674–680 (2017). https://doi.org/10.1038/nn.4528
- Received: 22 August 2016
- Accepted: 03 February 2017
- Published: 13 March 2017
- Issue Date: May 2017
- DOI: https://doi.org/10.1038/nn.4528