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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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Hormonal Regulation of Blood Pressure01:17

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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.
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Composition of Blood Plasma01:24

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Blood plasma is a fluid that contains approximately 92% water and 8% solutes. The solutes include various types of proteins, which constitute about 7% of the total solutes in the plasma. The high-molecular-weight proteins—albumins, globulins, and fibrinogen—are essential to plasma function. Albumins, making up about 60% of the plasma proteins, maintain the osmotic balance within blood vessels by preventing excessive water leakage. Additionally, albumins serve as carrier proteins,...
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Blood Pressure01:24

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The movement of blood in a human body, commonly referred to as blood flow, is determined by the volume of blood that traverses a certain section of the bodily system per unit time. It is the rhythmic contraction of the heart's ventricles that primarily instigates this movement. As the ventricles contract, blood is forced into the prominent arteries, which then flow from areas of greater pressure to lower pressure areas. This movement continues into smaller arteries and arterioles and...
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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.
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Related Experiment Video

Updated: Feb 8, 2026

Isolation of Exosomes from the Plasma of HIV-1 Positive Individuals
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Plasma exosomes regulate systemic blood pressure in rats.

Kosuke Otani1, Mai Yokoya1, Tomoko Kodama1

  • 1Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Towada, Aomori, 034-0828, Japan.

Biochemical and Biophysical Research Communications
|June 19, 2018
PubMed
Summary

Plasma exosomes regulate blood pressure and cardiovascular health. Studies show exosomes from hypertensive rats raise blood pressure and alter blood vessel structure, while exosomes from normotensive rats have the opposite effect.

Keywords:
ExosomesFibrosisHypertensionPlasmaSpontaneously hypertensive rats

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Protein Digestion, Ultrafiltration, and Size Exclusion Chromatography to Optimize the Isolation of Exosomes from Human Blood Plasma and Serum
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Area of Science:

  • Cardiovascular Biology
  • Extracellular Vesicles
  • Hypertension Research

Background:

  • Exosomes, small extracellular vesicles, are key mediators of cell-cell communication.
  • While microRNAs within exosomes are known to influence gene expression, their specific role in hypertension remains unclear.
  • The impact of plasma-derived exosomes on essential hypertension has not been thoroughly investigated.

Purpose of the Study:

  • To investigate the role of plasma exosomes in regulating systemic blood pressure.
  • To determine if exosomes derived from normotensive and spontaneously hypertensive rats differentially affect cardiovascular structure and function.

Main Methods:

  • Plasma exosomes were isolated from Wistar Kyoto (WKY) and spontaneously hypertensive rats (SHR) using ultracentrifugation.
  • Exosomes were administered intraperitoneally to WKY and SHR rats weekly for six weeks.
  • Systemic blood pressure, thoracic aorta structure, mesenteric arterial smooth muscle function, and left ventricular characteristics were assessed.

Main Results:

  • SHR-derived exosomes significantly increased systolic blood pressure in WKY rats.
  • WKY-derived exosomes significantly decreased blood pressure in SHR rats.
  • SHR-derived exosomes induced aortic wall thickening and altered collagen content in WKY rats, while WKY-derived exosomes ameliorated these changes in SHR. WKY-derived exosomes also suppressed abnormal mesenteric artery contraction in SHR and reduced cardiac fibrosis.

Conclusions:

  • Plasma exosomes play a significant role in modulating systemic blood pressure.
  • Exosomes can influence cardiovascular tissue structure and function in both normotensive and hypertensive states.
  • These findings highlight plasma exosomes as potential therapeutic targets for hypertension.