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Structure and Function of Platelets

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...

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Preparation of Pooled Human Platelet Lysate pHPL as an Efficient Supplement for Animal Serum-Free Human Stem Cell Cultures

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Self-assembled poly(L-lactide)-based platelets prepared via seeded growth.

Laihui Xiao¹, Tianlai Xia¹, Rachel K O'Reilly¹

¹School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK. r.oreilly@bham.ac.uk.

Faraday Discussions

|September 19, 2025

Summary

This summary is machine-generated.

Researchers developed a seeded growth method using polymers to create controllable, 2D poly(L-lactide) (PLLA) platelets. This technique enables scalable production of biodegradable nanoparticles for biomedical applications.

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Characterization of Leukocyte-platelet Rich Fibrin, A Novel Biomaterial

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Characterization of Leukocyte-platelet Rich Fibrin, A Novel Biomaterial

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Published on: September 29, 2015

Area of Science:

Materials Science
Polymer Chemistry
Nanotechnology

Background:

Crystallization-driven self-assembly (CDSA) is key for nanostructure fabrication.
Precise control over 2D platelet formation, especially for poly(L-lactide) (PLLA), is difficult.
Existing methods lack scalability and precise control over nanoparticle morphology.

Purpose of the Study:

To develop a robust method for synthesizing size-controllable 2D PLLA platelets.
To enhance the crystallization kinetics and stability of PLLA nanostructures.
To establish a scalable production process for PLLA nanoparticles.

Main Methods:

Utilized a seeded growth strategy with a blend of PLLA homopolymers and diblock copolymers.
Optimized parameters including temperature, polymer composition, and molecular weight.
Transitioned the synthesis from batch to a continuous flow system.

Main Results:

Achieved precise control over the size and formation of 2D PLLA platelets.
Demonstrated enhanced crystallization kinetics and stability via polymer blending.
Successfully scaled up platelet production using a continuous flow process.

Conclusions:

The seeded growth strategy offers a versatile approach for producing well-defined PLLA platelets.
The developed method enables scalable and controllable synthesis of biodegradable nanoparticles.
These PLLA platelets hold potential for advanced biomedical and functional material applications.