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Related Concept Videos

Structure and Function of Platelets01:18

Structure and Function of Platelets

The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000 platelets, with...
Formation of the Platelet Plug01:22

Formation of the Platelet Plug

The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
Hypertension and Regulation of Blood Pressure01:18

Hypertension and Regulation of Blood Pressure

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...
Blood Pressure01:30

Blood Pressure

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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Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors01:20

Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors

Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
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Introduction to Hemostasis01:05

Introduction to Hemostasis

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Updated: Jun 29, 2026

Microfluidics in Assessing Platelet Function
06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

Platelet function in hypertension.

Mohammed El Haouari1, Juan A Rosado

  • 1Département de Biologie, Université Mohamed 1(er), Faculté des Sciences, Oujda 60000, Morocco. elhouarim@yahoo.fr

Blood Cells, Molecules & Diseases
|October 3, 2008
PubMed
Summary
This summary is machine-generated.

Hypertension alters platelet function, increasing their sensitivity and calcium levels. These changes in platelet activity contribute to cardiovascular complications, highlighting potential new drug targets.

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A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time

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Last Updated: Jun 29, 2026

Microfluidics in Assessing Platelet Function
06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

Live-cell Imaging of Platelet Degranulation and Secretion Under Flow
11:42

Live-cell Imaging of Platelet Degranulation and Secretion Under Flow

Published on: July 10, 2017

A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
09:38

A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time

Published on: February 14, 2017

Area of Science:

  • Cardiovascular Research
  • Hematology
  • Biochemistry

Background:

  • Hypertension is associated with altered platelet behavior.
  • Platelets play a crucial role in cardiovascular health and disease.
  • Understanding platelet dysfunction in hypertension is key to managing complications.

Purpose of the Study:

  • To investigate the functional abnormalities of platelets in hypertensive patients.
  • To explore the molecular mechanisms underlying platelet hyperactivity in hypertension.
  • To identify potential therapeutic targets for hypertension-related complications.

Main Methods:

  • Analysis of platelet sensitivity to agonists.
  • Measurement of intracellular free calcium concentration ([Ca2+]i).
  • Assessment of reactive oxygen species (ROS) production and antioxidant status.
  • Evaluation of protein tyrosine phosphorylation and nitric oxide (NO) bioavailability.

Main Results:

  • Platelets from hypertensive patients exhibit heightened agonist sensitivity and elevated [Ca2+]i.
  • Hypertension is linked to increased endogenous ROS production and decreased antioxidant capacity.
  • These factors promote protein tyrosine phosphorylation, enhance Ca2+ mobilization, and reduce NO bioavailability.

Conclusions:

  • Platelet hyperactivity is a significant feature of hypertension.
  • Dysfunctional platelets contribute to hypertension-related cardiovascular risks.
  • Targeting platelet abnormalities may offer novel pharmacological strategies for managing hypertension.