Related Experiment Video
Updated: Jan 10, 2026
10:08
Measuring Ascending Aortic Stiffness In Vivo in Mice Using Ultrasound
Published on: December 2, 2014
16.4K
Platelet stiffness correlates inversely with platelet volume during expansion and compression
Konstantin Krutzke1, Jan Seifert1, Meinrad Gawaz2
1Institute of Applied Physics, University of Tübingen, Auf der Morgenstelle 10, 72076, Tübingen, Germany. tilman.schaeffer@uni-tuebingen.de.
Soft Matter
|November 24, 2025
Summary
Human platelet stiffness and volume are inversely correlated. This finding, revealed by scanning ion conductance microscopy, offers new insights into platelet mechanics and function.
Area of Science:
- Cellular Mechanics
- Hematology
- Biophysics
Background:
- Platelet volume influences function, but its relationship with stiffness is unknown.
- Measuring platelet mechanics is challenging due to activation under stress.
Purpose of the Study:
- Investigate the relationship between human platelet volume and stiffness.
- Explore platelet mechanics under physiological conditions.
Main Methods:
- Scanning ion conductance microscopy (SICM) was used to measure platelet topography, volume, and mechanical properties.
- Measurements were performed on single cells under physiological conditions.
Main Results:
- A significant inverse correlation was found between platelet stiffness and volume.
- Platelet stiffness decreased with increasing volume, and vice versa.
- This relationship was confirmed during osmotic changes, platelet spreading, and spatial confinement.
Conclusions:
- A universal inverse correlation exists between human platelet stiffness and volume.
- This discovery opens new avenues for understanding platelet behavior and function.
Related Concept Videos
01:22Formation of the Platelet Plug
8.6K
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...
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...
8.6K
01:27Regulation of Stroke Volume
4.6K
The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
4.6K
01:17Autoregulation of Blood Flow
7.4K
Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation....
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation....
7.4K