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Related Experiment Video

Updated: Feb 12, 2026

Detection and Enrichment of Rare Antigen-specific B Cells for Analysis of Phenotype and Function

Detection and Enrichment of Rare Antigen-specific B Cells for Analysis of Phenotype and Function

Published on: February 16, 2017

Morphometric analysis of spread platelets identifies integrin α_IIbβ₃-specific contractile phenotype.

Sebastian Lickert¹, Simona Sorrentino², Jan-Dirk Studt³

¹Laboratory of Applied Mechanobiology, Department of Health Sciences and Technology, ETH Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland.

Scientific Reports

|April 5, 2018

Summary

Platelet cytoskeletal organization dictates clot contraction. This study reveals how integrin αIIbβ3 mechanotransduction drives a bipolar platelet shape essential for hemostasis, offering insights into bleeding disorders.

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Last Updated: Feb 12, 2026

Detection and Enrichment of Rare Antigen-specific B Cells for Analysis of Phenotype and Function

Detection and Enrichment of Rare Antigen-specific B Cells for Analysis of Phenotype and Function

Published on: February 16, 2017

Simplified, High-throughput Analysis of Single-cell Contractility using Micropatterned Elastomers

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Published on: April 8, 2022

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

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

Published on: May 23, 2025

Area of Science:

Hematology
Cell Biology
Biophysics

Background:

Platelet function in hemostasis relies on cellular mechanics and cytoskeletal changes.
The development of a contractile platelet phenotype for clot retraction is not well understood.

Purpose of the Study:

To investigate how cytoskeletal rearrangements in platelets lead to a contractile phenotype.
To develop a quantitative assay for assessing platelet morphology and its relation to function.

Main Methods:

Developed a morphometric screen to quantify actin and vinculin organization in single spread platelets.
Utilized super-resolution and electron microscopy to confirm cytoskeletal architecture.
Tested effects of integrin αIIbβ3 inhibitors and matrix stiffness on platelet morphology.

Main Results:

Platelets exhibited bipolar morphology on fibrinogen/fibronectin and isotropic morphology on collagen I/laminin.
Integrin αIIbβ3 inhibition and decreased matrix stiffness induced isotropic morphology.
Platelets from Glanzmann thrombasthenia patients showed circular F-actin consistent with residual integrin activity.

Conclusions:

Platelet cytoskeletal morphology in vitro reflects adhesion receptor identity and function.
Integrin αIIbβ3 mechanotransduction is crucial for the bipolar phenotype associated with clot contraction.
The developed assay provides quantitative assessment of platelet morphology, aiding in the diagnosis of bleeding disorders.