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Immune System and Microvascular Remodeling in Humans
Damiano Rizzoni1,2, Carolina De Ciuceis1, Piotr Szczepaniak3,4
1Clinica Medica, Department of Clinical and Experimental Sciences, University of Brescia, Italy (D.R., C.D.C.).
Hypertension (Dallas, Tex. : 1979)
|January 31, 2022
Summary
Immune cells and inflammation contribute to high blood pressure (hypertension) and organ damage. Understanding these immune mechanisms may lead to new hypertension treatments.
Area of Science:
- Immunology
- Cardiovascular Disease
- Pathophysiology
Background:
- Low-grade inflammation and oxidative stress are implicated in hypertension development and organ damage.
- Innate immune cells (neutrophils, dendritic cells, monocytes/macrophages) and unconventional T lymphocytes (γδ T cells) contribute to hypertension and vascular inflammation.
- Adaptive immunity, including effector T lymphocytes (Th1, Th2, Th17) and T-regulatory lymphocytes, plays a role in blood pressure elevation, vascular/kidney injury, and microvascular remodeling.
Purpose of the Study:
- To review the key immune mechanisms involved in hypertension-mediated inflammation and vascular remodeling.
- To highlight the role of immune cell subpopulations in the development and regression of microvascular remodeling.
- To explore how understanding these immune pathways can inform novel therapeutic strategies for hypertension.
Main Methods:
- Literature review of current research on immune system involvement in hypertension.
- Analysis of the roles of innate and adaptive immune cells in blood pressure regulation and organ damage.
- Synthesis of findings on immune cell-derived cytokines and their impact on oxidative stress and endothelial function.
Main Results:
- Immune cells, particularly effector T lymphocytes, promote hypertension, vascular inflammation, and microvascular remodeling.
- Cytokines produced by effector T cells exacerbate oxidative stress and endothelial dysfunction, contributing to target organ damage.
- T-regulatory lymphocytes may offer a protective effect against hypertension-related pathology.
- Evidence suggests immune cell subpopulations influence microvascular remodeling in hypertensive individuals.
Conclusions:
- Immune system activation is a significant factor in hypertension pathogenesis and associated organ damage.
- Specific immune cell types and their secreted factors drive vascular inflammation and remodeling in hypertension.
- Targeting immune pathways presents a promising avenue for developing innovative hypertension therapies.
