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Related Concept Videos

Hypertension and Regulation of Blood Pressure01:18

Hypertension and Regulation of Blood Pressure

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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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Antihypertensive Drugs: Action of β1 Blockers01:17

Antihypertensive Drugs: Action of β1 Blockers

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β1-receptors are primarily located in the heart and kidneys. In cardiac myocytes, these receptors interact with neurotransmitters released by the sympathetic nervous system during heightened activity or danger. As a result, β1-receptors get activated, initiating a series of biochemical processes. Excessive activation of beta receptors due to chronic stress can abnormally increase heart rate and contractility, resulting in high blood pressure or hypertension. To counteract this,...
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Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors01:30

Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors

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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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Hormonal Regulation of Blood Pressure01:17

Hormonal Regulation of Blood Pressure

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Endocrinal or hormonal intervention in the cardiovascular system is predominantly exerted by the catecholamines - epinephrine and norepinephrine, as well as a slew of hormones that interact with renal function to modulate blood volume.
Epinephrine and Norepinephrine
The adrenal medulla releases epinephrine and norepinephrine, catecholamines that enhance and extend the sympathetic or "fight or flight" physiological response. These hormones escalate heart rate and the force of contraction...
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Neural Regulation of Blood Pressure01:18

Neural Regulation of Blood Pressure

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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.
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
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Blood Pressure01:30

Blood Pressure

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Blood pressure (BP) is the pressure or force of blood exerted on the artery's walls as it circulates through the body. It is essential for maintaining blood flow throughout the body.
The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the...
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Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells
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Immune cells and hypertension.

Liren Gan1,2,3, Di Ye1,2,3, Yongqi Feng1,2,3

  • 1Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China.

Immunologic Research
|December 3, 2023
PubMed
Summary

Immune cells significantly contribute to hypertension pathogenesis by infiltrating organs and releasing inflammatory cytokines. Understanding these immune responses is crucial for developing new treatments for high blood pressure.

Keywords:
HypertensionImmune cellsInterleukins

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Area of Science:

  • Cardiovascular Disease Research
  • Immunology
  • Hypertension Pathogenesis

Background:

  • Hypertension is a major cause of mortality linked to target organ damage.
  • Current treatments are insufficient, with only one-sixth of patients achieving effective blood pressure control.
  • Understanding hypertension's underlying mechanisms, particularly the role of immune cells, is critical.

Purpose of the Study:

  • To review the current research on the involvement of various immune cells in the pathogenesis of hypertension.
  • To elucidate the mechanisms by which immune cells contribute to hypertension-related organ damage.

Main Methods:

  • Review of existing scientific literature on immune cells and hypertension.
  • Analysis of the roles of innate and adaptive immune cells (monocytes/macrophages, neutrophils, dendritic cells, NK cells, B and T lymphocytes).
  • Examination of immune cell infiltration in cardiovascular tissues and their secreted factors.

Main Results:

  • Immune cells infiltrate blood vessels, kidneys, and hearts, causing damage.
  • Immune cells secrete cytokines (e.g., interleukin, interferon, tumor necrosis factor) that influence inflammation, oxidative stress, and renal function.
  • These processes contribute to cardiovascular dysfunction, remodeling, and fibrosis, impacting blood pressure regulation.

Conclusions:

  • Immune cell activity is a key factor in hypertension development and progression.
  • Targeting immune responses presents a potential therapeutic strategy for managing hypertension and its complications.