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Related Concept Videos

Disorders of Hemostasis01:24

Disorders of Hemostasis

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Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
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Structure and Function of Platelets01:18

Structure and Function of Platelets

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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...
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Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

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Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
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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

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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.
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
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Disorders of Erythrocytes01:27

Disorders of Erythrocytes

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Disorders of erythrocytes, or red blood cells (RBCs), include a range of conditions affecting their number, shape, or function.
Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
On the other...
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Formation of the Platelet Plug01:22

Formation of the Platelet Plug

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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...
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Professor Gustav Victor Rudolph Born (29 July 1921 - 16 April 2018).

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An adenine insertion in exon 6 of human GP6 generates a truncated protein associated with a bleeding disorder in four Chilean families.

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The Natural Mutation Arg221aTrp in Human α-Thrombin Abrogates Physiological Na<sup>+</sup> Binding and Preferentially Hinders the Protease Anticoagulant Functions.

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Related Experiment Video

Updated: Apr 7, 2026

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation
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Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation

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Inherited disorders of platelet function: selected updates.

A T Nurden1, P Nurden1

  • 1Institut de Rhythmologie et de Modélisation Cardiaque, Plateforme Technologique d'Innovation Biomédicale, Hôpital Xavier Arnozan, Pessac, France.

Journal of Thrombosis and Haemostasis : JTH
|July 8, 2015
PubMed
Summary
This summary is machine-generated.

Next-generation sequencing technology has identified gene variants causing platelet disorders, but predicting bleeding severity remains challenging. Future research using this technology aims to uncover additional factors for improved patient care.

Keywords:
Glanzmann thrombastheniablood plateletsgenetic variationhemorrhagehigh‐throughput nucleotide sequencingrare diseases

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Area of Science:

  • Hematology
  • Genetics
  • Molecular Biology

Background:

  • Platelet disorders stem from identified gene variants affecting platelet function.
  • Next-generation sequencing technology (NGST) has been pivotal in discovering genes linked to platelet secretion, procoagulant activity, and activation.
  • These disorders can involve altered platelet production and may co-occur with other organ malfunctions.

Purpose of the Study:

  • To review recent advancements in identifying gene variants associated with platelet disorders.
  • To highlight the role of NGST in uncovering the genetic basis of platelet dysfunction.
  • To discuss the challenges in predicting bleeding severity and the need for further research.

Main Methods:

  • Exome sequencing as a primary NGST approach.
  • Review of identified gene variants and their associated platelet function defects.
  • Analysis of clinical observations and genetic data.

Main Results:

  • Identification of key genes (e.g., NBEAL2, STIM1, RASGRP2, PRKACG) responsible for specific platelet secretion, procoagulant, and activation defects.
  • Recognition that platelet disorders often involve changes in platelet number/size and can be systemic.
  • Understanding that genetic variants can lead to protein synthesis prevention, function loss, or aberrant protein activation.

Conclusions:

  • NGST has significantly advanced the understanding of the genetic underpinnings of platelet disorders.
  • Predicting bleeding severity solely by genotype is insufficient, indicating the influence of other unidentified factors.
  • Identifying these additional factors through advanced genetic analysis is crucial for enhancing patient care and management of platelet disorders.