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Related Concept Videos

Hypertension II: Pathophysiology01:29

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Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...
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Hypertension, the most common cardiovascular disease, is diagnosed through repeated measurements of elevated blood pressure. Its risks, including damage to the kidney, heart, and brain, are directly proportional to blood pressure levels. Starting from 115/75 mm Hg, the risk of cardiovascular disease doubles with each increment of 20/10 mm Hg. The diagnosis relies on blood pressure measurements, not on patient symptoms, as hypertension is often asymptomatic until end-organ damage is imminent or...
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Disorders of the Autonomic Nervous System01:18

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The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
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The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
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Hypertension is asymptomatic and also referred to as the "silent killer" until it progresses to a severe stage or causes target organ disease. Patients may experience symptoms stemming from the strain on blood vessels and tissues in various organs or the heart's increased workload.Physical exams might show no abnormalities other than high blood pressure. Signs of vascular damage, when present, correspond to the organs supplied by the affected vessels, leading to target organ damage. For...
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Angiotensin-converting enzyme (ACE), a vital component of the renin-angiotensin-aldosterone system, is abundant in lung endothelial cells. ACE converts the inactive decapeptide, angiotensin I, into the active octapeptide, angiotensin II. This potent vasoconstrictor narrows blood vessels, increasing resistance to blood flow and elevating blood pressure. Angiotensin II also stimulates aldosterone production, encouraging kidney cells to reabsorb more sodium and water from urine, thereby increasing...
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Related Experiment Video

Updated: May 2, 2026

Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells
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The immune system in hypertension.

Daniel W Trott1, David G Harrison

  • 1Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee.

Advances in Physiology Education
|March 4, 2014
PubMed
Summary

The immune system plays a significant role in hypertension, with inflammatory cells and cytokines contributing to blood pressure elevation and organ damage. Understanding immune cell activation is key to managing this complex cardiovascular disease.

Keywords:
T cellangiotensincostimulationcytokinessubfornical organ

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Intracellular Staining and Flow Cytometry to Identify Lymphocyte Subsets within Murine Aorta, Kidney and Lymph Nodes in a Model of Hypertension
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Area of Science:

  • Immunology
  • Cardiovascular Research
  • Nephrology

Background:

  • Hypertension is traditionally linked to vascular, kidney, and central nervous system issues.
  • Emerging research over 50 years highlights the immune system's contribution to hypertension.
  • Inflammatory cell accumulation in kidneys and vasculature is observed in hypertensive individuals and animals.

Purpose of the Study:

  • To explore the role of the immune system in the development and progression of hypertension.
  • To investigate the mechanisms by which immune cells and their products influence blood pressure regulation.
  • To propose a unifying hypothesis linking the nervous, immune, and renal/vascular systems in hypertension.

Main Methods:

  • Studies utilizing genetically modified mice (recombinase-activating gene-deficient, severe combined immunodeficiency) lacking adaptive immune cells.
  • Adoptive transfer of T cells to assess their impact on blood pressure.
  • Investigating the role of B cell-produced antibodies to the ANG II receptor.
  • Examining the influence of central nervous system lesions (anteroventral third ventricle) and genetic manipulation of reactive oxygen species in the subfornical organ.
  • Analyzing the contribution of specific cytokines (TNF-α, IL-17, IL-6) and innate immune system components.

Main Results:

  • Mice lacking adaptive immunity exhibit blunted hypertensive responses to stimuli like ANG II, high salt, and norepinephrine.
  • T cell transfer restored blood pressure responses in immunodeficient models.
  • B cell-derived antibodies targeting the ANG II receptor contribute to hypertension in preeclampsia models.
  • Central nervous system manipulations affected both hypertension and immune cell activation.
  • Cytokines such as TNF-α, IL-17, and IL-6 are implicated in hypertension, affecting kidney and vasculature.
  • The innate immune system also appears to contribute to hypertension.

Conclusions:

  • The immune system, encompassing both adaptive and innate components, is a critical factor in hypertension.
  • Immune cell activation, cytokine production, and their interactions with the sympathetic nervous system, kidney, and vasculature drive hypertensive responses.
  • Targeting immune pathways offers potential new therapeutic strategies for hypertension and its associated end-organ damage.