TY - JOUR
T1 - Identification of a non-canonical chemokine-receptor pathway suppressing regulatory T cells to drive atherosclerosis
AU - Döring, Yvonne
AU - van der Vorst, Emiel P.C.
AU - Yan, Yi
AU - Neideck, Carlos
AU - Blanchet, Xavier
AU - Jansen, Yvonne
AU - Kemmerich, Manuela
AU - Bayasgalan, Soyolmaa
AU - Peters, Linsey J.F.
AU - Hristov, Michael
AU - Bidzhekov, Kiril
AU - Yin, Changjun
AU - Zhang, Xi
AU - Leberzammer, Julian
AU - Li, Ya
AU - Park, Inhye
AU - Kral, Maria
AU - Nitz, Katrin
AU - Parma, Laura
AU - Gencer, Selin
AU - Habenicht, Andreas J.R.
AU - Faussner, Alexander
AU - Teupser, Daniel
AU - Monaco, Claudia
AU - Holdt, Lesca
AU - Megens, Remco T.A.
AU - Atzler, Dorothee
AU - Santovito, Donato
AU - von Hundelshausen, Philipp
AU - Weber, Christian
N1 - Funding Information:
We are indebted to A. Rot (Queen Mary University) for thoughtful discussions. We thank L. Saroyan, O. Schengel and staff at the animal facility (all LMU Munich) for excellent technical assistance. We thank S. Michaelides (LMU Munich) for generously providing Jurkat CCR4- and CCR8-transfectants, K. Pfeffer (Heinrich-Heine-Universität) for kindly providing Ccr4 mice and I. Förster (Universität Bonn) for generously providing Ccl17 (GFP reporter knock-in) mice. This work was supported by Deutsche Forschungsgemeinschaft (DFG) SFB1123-A1/A10 to Y.D. and C.W., SFB1123-A2 to P.v.H., SFB1123-B1 to D.T. and L.H., SFB1123-Z1 to R.T.A.M., SFB1123-A5 to D.A., SFB1123-B5 to D.S. and 390857198-EXC 2145 to C.W.; by the European Research Council (AdG °692511 to C.W.); by the German Ministry of Education and Research (BMBF) and the German Center for Cardiovascular Research (DZHK) to Y.D., C.W., D.S. and E.P.C.v.d.V. (81X2600254, 81Z0600202 and 81Z0600203); by grants from the Interdisciplinary Center for Clinical Research within the faculty of Medicine at the RWTH Aachen University and NWO-ZonMw Veni (91619053) to E.P.C.v.d.V.; by the DFG YI 133/3-5 and Friedrich-Baur-Stiftung 39/20 to C.Y.; by the DFG HA 1083/15-4, HA 1083/15-5 and ERA-CVD (PLAQUEFIGHT) 01KL1808 to A.J.R.H. and ERA-CVD (AtheroInside) 01KL1908 to R.T.A.M. The position of L.P. was kindly supported by DZHK (81X2600271). C.W. is van der Laar-Professor of Atherosclerosis. -/- e/e
Publisher Copyright:
© 2024, The Author(s).
PY - 2024/2
Y1 - 2024/2
N2 - CCL17 is produced by conventional dendritic cells, signals through CCR4 on regulatory T (Treg) cells and drives atherosclerosis by suppressing Treg functions through yet undefined mechanisms. Here we show that conventional dendritic cells from CCL17-deficient mice display a pro-tolerogenic phenotype and transcriptome that is not phenocopied in mice lacking its cognate receptor CCR4. In the plasma of CCL17-deficient mice, CCL3 was the only decreased cytokine/chemokine. We found that CCL17 signaled through CCR8 as an alternate high-affinity receptor, which induced CCL3 expression and suppressed Treg functions in the absence of CCR4. Genetic ablation of CCL3 and CCR8 in CD4+ T cells reduced CCL3 secretion, boosted FoxP3+ Treg numbers and limited atherosclerosis. Conversely, CCL3 administration exacerbated atherosclerosis and restrained Treg differentiation. In symptomatic versus asymptomatic human carotid atheroma, CCL3 expression was increased, whereas FoxP3 expression was reduced. Together, we identified a non-canonical chemokine pathway whereby CCL17 interacts with CCR8 to yield a CCL3-dependent suppression of atheroprotective Treg cells.
AB - CCL17 is produced by conventional dendritic cells, signals through CCR4 on regulatory T (Treg) cells and drives atherosclerosis by suppressing Treg functions through yet undefined mechanisms. Here we show that conventional dendritic cells from CCL17-deficient mice display a pro-tolerogenic phenotype and transcriptome that is not phenocopied in mice lacking its cognate receptor CCR4. In the plasma of CCL17-deficient mice, CCL3 was the only decreased cytokine/chemokine. We found that CCL17 signaled through CCR8 as an alternate high-affinity receptor, which induced CCL3 expression and suppressed Treg functions in the absence of CCR4. Genetic ablation of CCL3 and CCR8 in CD4+ T cells reduced CCL3 secretion, boosted FoxP3+ Treg numbers and limited atherosclerosis. Conversely, CCL3 administration exacerbated atherosclerosis and restrained Treg differentiation. In symptomatic versus asymptomatic human carotid atheroma, CCL3 expression was increased, whereas FoxP3 expression was reduced. Together, we identified a non-canonical chemokine pathway whereby CCL17 interacts with CCR8 to yield a CCL3-dependent suppression of atheroprotective Treg cells.
U2 - 10.1038/s44161-023-00413-9
DO - 10.1038/s44161-023-00413-9
M3 - Article
SN - 2731-0590
VL - 3
SP - 221
EP - 242
JO - Nature cardiovascular research
JF - Nature cardiovascular research
IS - 2
ER -