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- W4225570424 abstract "Background: Type 1 angiotensin (AT 1 ) receptors are expressed on immune cells, and we previously found that bone marrow–derived AT 1 receptors protect against Ang (angiotensin) II-induced hypertension. CD11c is expressed on myeloid cells derived from the bone marrow, including dendritic cells (DCs) that activate T lymphocytes. Here, we examined the role of AT 1 receptors on CD11c + cells in hypertension pathogenesis. Methods: Mice lacking the dominant murine AT 1 receptor isoform, AT 1a, on CD11c + cells (dendritic cell [DC] AT1aR knockout [KO]) and wild-type (WT) littermates were subjected to Ang II-induced hypertension. Blood pressures were measured by radiotelemetry. Results: DC AT1aR KO mice had exaggerated hypertensive responses to chronic Ang II infusion with enhanced renal accumulation of effector memory T cells and CD40 + DCs. CCL5 (C-C motif chemokine ligand 5) recruits T cells into injured tissues, and CCR7 (C-C motif chemokine receptor 7) facilitates DC and T cell interactions in the kidney lymph node to allow T cell activation. DCs from the hypertensive DC AT1aR KO kidneys expressed higher levels of CCL5 and CCR7. mRNA expressions for CCR7 and tumor necrosis factor-α were increased in CD4 + T cells from the renal lymph nodes of DC AT1aR KO mice. During the second week of Ang II infusion when blood pressures between groups diverged, DC AT1aR KO mice excreted less sodium than WTs. Expressions for epithelial sodium channel subunits were increased in DC AT1aR KO kidneys. Conclusions: Following activation of the renin angiotensin system, AT1aR stimulation on DCs suppresses renal DC maturation and T cell activation with consequent protection from sodium retention and blood pressure elevation." @default.
- W4225570424 created "2022-05-05" @default.
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- W4225570424 date "2022-06-01" @default.
- W4225570424 modified "2023-10-16" @default.
- W4225570424 title "Type 1 Angiotensin Receptors on CD11c-Expressing Cells Protect Against Hypertension by Regulating Dendritic Cell–Mediated T Cell Activation" @default.
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- W4225570424 doi "https://doi.org/10.1161/hypertensionaha.121.18734" @default.
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