Identification of Pathogenic Cardiac CD11c+ Macrophages in Nod1-Mediated Acute Coronary Arteritis

Yoshitomo Motomura, Shunsuke Kanno, Kenichi Asano, Masato Tanaka, Yutaka Hasegawa, Hideki Katagiri, Takashi Saito, Hiromitsu Hara, Hisanori Nishio, Toshiro Hara, Sho Yamasaki

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16 Citations (Scopus)

Abstract

Objective - Nod1 is an intracellular pattern recognition receptor for bacterial peptidoglycan fragments. We previously reported that a synthetic Nod1 ligand, FK565, induced acute coronary arteritis in mice similar to that of Kawasaki disease. However, the molecular mechanisms underlying this characteristic inflammation have remained elusive. Approach and Results - We found that CD11c+MHC class II+ cells accumulated in the heart of FK565-treated mice before arteritis development. Morphological features and gene expression signatures of the cardiac CD11c+MHC class II+ cells suggested that this population is closely related to macrophages, and thus, we designated them cardiac CD11c+ macrophages. Nod1 in nonhematopoietic cells, rather than hematopoietic cells, was required for the increase of cardiac CD11c+ macrophages and arteritis development. Among nonhematopoietic cells, cardiac endothelial cells produced a large amount of chemokines in response to FK565. Endothelial cell-specific blockade of Nod1 signaling suppressed FK565-induced expression of these chemokines, accumulation of cardiac CD11c+ macrophages, and subsequent coronary arteritis development. We also found that CCR2+Ly6Chi inflammatory monocytes in peripheral blood supplied precursors of cardiac CD11c+ macrophages. CCR2-deficient mice or pertussis toxin-treated mice exhibited decreased numbers of cardiac CD11c+ macrophages and reduced arteritis. Conclusions - These results suggest that Ly6Chi monocytes are recruited to FK565-activated endothelial cells to generate cardiac CD11c+ macrophages, which play a pivotal role in the pathogenesis of acute coronary arteritis.

Original languageEnglish
Pages (from-to)1423-1433
Number of pages11
JournalArteriosclerosis, thrombosis, and vascular biology
Volume35
Issue number6
DOIs
Publication statusPublished - Jun 27 2015

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Arteritis
Macrophages
Endothelial Cells
Chemokines
Monocytes
Pattern Recognition Receptors
Mucocutaneous Lymph Node Syndrome
Peptidoglycan
Pertussis Toxin
Transcriptome
Ligands
Inflammation
Population

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine

Cite this

Identification of Pathogenic Cardiac CD11c+ Macrophages in Nod1-Mediated Acute Coronary Arteritis. / Motomura, Yoshitomo; Kanno, Shunsuke; Asano, Kenichi; Tanaka, Masato; Hasegawa, Yutaka; Katagiri, Hideki; Saito, Takashi; Hara, Hiromitsu; Nishio, Hisanori; Hara, Toshiro; Yamasaki, Sho.

In: Arteriosclerosis, thrombosis, and vascular biology, Vol. 35, No. 6, 27.06.2015, p. 1423-1433.

Research output: Contribution to journalArticle

Motomura, Y, Kanno, S, Asano, K, Tanaka, M, Hasegawa, Y, Katagiri, H, Saito, T, Hara, H, Nishio, H, Hara, T & Yamasaki, S 2015, 'Identification of Pathogenic Cardiac CD11c+ Macrophages in Nod1-Mediated Acute Coronary Arteritis', Arteriosclerosis, thrombosis, and vascular biology, vol. 35, no. 6, pp. 1423-1433. https://doi.org/10.1161/ATVBAHA.114.304846
Motomura, Yoshitomo ; Kanno, Shunsuke ; Asano, Kenichi ; Tanaka, Masato ; Hasegawa, Yutaka ; Katagiri, Hideki ; Saito, Takashi ; Hara, Hiromitsu ; Nishio, Hisanori ; Hara, Toshiro ; Yamasaki, Sho. / Identification of Pathogenic Cardiac CD11c+ Macrophages in Nod1-Mediated Acute Coronary Arteritis. In: Arteriosclerosis, thrombosis, and vascular biology. 2015 ; Vol. 35, No. 6. pp. 1423-1433.
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AU - Tanaka, Masato

AU - Hasegawa, Yutaka

AU - Katagiri, Hideki

AU - Saito, Takashi

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AU - Yamasaki, Sho

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