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Muhammad Oneeb Rehman Mian1, Pierre Paradis, Ernesto L Schiffrin

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The exact cause of hypertension is unknown, but low-grade inflammation involving innate immunity is increasingly implicated. This review explores how innate immune cells contribute to hypertension pathogenesis.

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Area of Science:

  • Immunology
  • Cardiovascular Disease
  • Pathophysiology

Background:

  • The precise etiology of hypertension remains elusive, despite extensive investigation.
  • Low-grade inflammation is a proposed key factor in hypertension development.
  • While adaptive immunity's role is studied, innate immunity's contribution to hypertension pathophysiology is less understood.

Purpose of the Study:

  • To review current evidence on the role of innate immunity in hypertension.
  • To discuss the activation mechanisms and responses of innate effector cells in hypertension.
  • To highlight the potential of innate immunity as a mediator of chronic inflammation in hypertension.

Main Methods:

  • Review of recent scientific literature on innate immunity and hypertension.
  • Analysis of studies investigating innate effector cells (monocytes, macrophages, dendritic cells, NK cells).
  • Examination of molecular triggers like damage-associated molecular patterns (DAMPs) and pathogen-associated molecular patterns (PAMPs).

Main Results:

  • Innate immune responses, triggered by DAMPs/PAMPs and Toll-like receptors, are implicated in hypertension.
  • Innate effector cells such as monocytes, macrophages, dendritic cells, and natural killer cells contribute to inflammation.
  • These innate responses can directly promote inflammation or activate adaptive immune responses involving T lymphocytes.

Conclusions:

  • Innate immunity plays a significant, yet underappreciated, role in the inflammatory processes underlying hypertension.
  • Understanding innate immune cell activation pathways is crucial for developing novel hypertension therapies.
  • Further research into innate immunity mechanisms could unlock new strategies for managing high blood pressure.