PD-L1 expression is maintained on NCMs under inflammatory conditions and PD-L1+NCMs are found in TLOs. PD-L1 expression is maintained on NCMs under inflammatory.

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PD-L1 expression is maintained on NCMs under inflammatory conditions and PD-L1+NCMs are found in TLOs. PD-L1 expression is maintained on NCMs under inflammatory conditions and PD-L1+NCMs are found in TLOs. (A) Representative flow cytometry and (B) quantification of PD-L1 expression on blood leukocytes in mice after sham or MI surgery. Data are shown as means ± SEM. n = 3 (sham) and n = 6 (MI) mice. ***P < 0.001. (C) Quantification of NCMs in PAT of mice after sham or MI surgery. Data are shown as means ± SEM. n = 5. ***P < 0.001. (D) Quantification of PD-L1 expression on leukocyte populations in PAT of mice after sham or MI surgery. Data are shown as means ± SEM. n = 3. ***P < 0.001. (E) Representative 3D TPLSM reconstruction of a TLO in PAT of mice showing clustered B cells (B220+, blue), T cells (CD3+, green), and monocytes (CD115+, red). Adipocyte-derived autofluorescence is depicted in yellow. Scale bar, 90 μm. (F) Detailed TPLSM micrography of PD-L1+ (white), CD115+ (red) NCMs (indicated by the arrows), B220+ (blue) B cells, and CD3+ (green) T cells in a TLO in PAT of mice. Single markers are shown on the right. Adipocyte-derived autofluorescence is depicted in yellow. Scale bar, 20 μm. (G) Representative 3D TPLSM reconstruction of CD115+ PD-L1+ NCMs (yellow spheres) and CD31+ blood vessels (blue) in a TLO of PAT. Three examples of NCMs in contact with the extraluminal side of the vascular wall (tilted insets) are shown in detail. Scale bar, 30 μm. (H) Confocal laser scanning microscopy (CLSM) image of a TLO in human adventitial fat of the aorta, showing CD20+ (red) B cells and PD-L1+ (white), CD14+ (green), CD16+ (blue) NCMs. Representative PD-L1+ NCMs are indicated by Roman numerals and shown in detail and as single-color micrographs on the right. Scale bars, 20 μm and 5 μm. Mariaelvy Bianchini et al. Sci. Immunol. 2019;4:eaar3054 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works