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Platelet-Rich Plasma: An Endogenous Bioregulatory Modulator Coordinating Soft Tissue Remodeling.
Bowen Liao1,2, Zhongsheng Sun3, Liwen Huang2
1The First School of Clinical Medicine, Southern Medical University, Guangzhou, China.
Aesthetic Plastic Surgery
|June 20, 2026
Summary
Platelet-rich plasma (PRP) is a bioregulatory system influencing tissue repair and rejuvenation, not just a growth factor supplement. Its effectiveness in soft-tissue remodeling depends on preparation and formulation, requiring standardized studies.
Area of Science:
- Regenerative Medicine
- Biomaterials Science
- Tissue Engineering
Background:
- Platelet-rich plasma (PRP) is increasingly studied for soft-tissue repair due to its biological functions.
- PRP's activity is complex, extending beyond growth factors and influenced by preparation methods.
Purpose of the Study:
- To review the evidence on PRP and related products in soft-tissue repair and aesthetic remodeling.
- To elucidate the mechanisms by which PRP influences tissue microenvironments.
Main Methods:
- Comprehensive literature search of PubMed/MEDLINE, Web of Science, and Google Scholar.
- Inclusion of studies on PRP, PRF, platelet-derived extracellular vesicles, and various soft-tissue applications.
- Literature review up to March 2026.
Main Results:
- PRP modulates inflammation, angiogenesis, ECM deposition, and regeneration via macrophage polarization, stem cell regulation, and mitochondrial transfer.
- Mechanisms involve TGF-β/Smad signaling, MMP activity, and vascular reconstruction.
- Significant variability exists in PRP preparations (concentration, leukocytes, activation, fibrin), impacting outcomes.
Conclusions:
- PRP functions as a context-dependent bioregulatory system modifying the tissue microenvironment.
- PRP shows potential in scar revision, fat graft retention, and facial rejuvenation.
- Standardized clinical studies with detailed formulations are crucial for further validation.
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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...
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...
01:18Structure 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...
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...
01:16Clot Retraction and Fibrinolysis
After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
01:05Introduction to Hemostasis
Hemostasis is a complex physiological process that prevents excessive bleeding when a blood vessel is injured. It's crucial for maintaining the integrity of the circulatory system, as it ensures that our blood remains fluid while still within the vascular network and yet clots to prevent blood loss upon vessel injury.
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized, and...
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