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Formation of the Platelet Plug01:22

Formation of the Platelet Plug

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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Platelet-Rich Plasma Lysate for Treatment of Eye Surface Diseases
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Trehalose lyophilized platelets for wound healing.

Giorgio Pietramaggiori1, Arja Kaipainen, David Ho

  • 1Division of Plastic Surgery, Brigham and Women's Hospital, Boston, MA 02115, USA.

Wound Repair and Regeneration : Official Publication of the Wound Healing Society [And] the European Tissue Repair Society
|March 14, 2007
PubMed
Summary

Lyophilized platelets preserved with trehalose show promise for wound healing. A single dose enhanced diabetic wound healing, offering a potential solution for nonhealing wounds.

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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:

  • Biomedical Engineering
  • Regenerative Medicine
  • Wound Healing Research

Background:

  • Fresh platelet preparations are used for wound treatment but face storage challenges and inconsistent outcomes.
  • Developing stable, effective platelet-based therapies is crucial for improving wound healing.
  • Trehalose preservation offers a potential method to stabilize platelets for extended use.

Purpose of the Study:

  • To evaluate the efficacy of trehalose-lyophilized and reconstituted platelet preparations in enhancing wound healing.
  • To compare the effects of single and multiple doses of these preparations against fresh platelets, VEGF, and untreated controls.
  • To assess the impact on granulation tissue, vascularity, proliferation, and wound closure in diabetic mice.

Main Methods:

  • Full-thickness wounds were created in genetically diabetic mice.
  • Treatments included single/multiple doses of trehalose-lyophilized platelets, multiple doses of fresh platelets, multiple doses of vascular endothelial growth factor (VEGF), and untreated controls.
  • Histology and immunohistochemistry were used to assess granulation tissue deposition, vascularity, and proliferation.
  • Wound closure rates were monitored.

Main Results:

  • Trehalose-lyophilized platelets (single/multiple doses), fresh platelets (multiple doses), and VEGF (multiple doses) significantly increased granulation tissue, vascularity, and proliferation compared to controls.
  • A single dose of trehalose-lyophilized platelets and multiple doses of VEGF accelerated wound closure to 90% faster than untreated wounds.
  • These findings suggest enhanced wound healing properties of the preserved platelet preparation.

Conclusions:

  • A single administration of trehalose-lyophilized and reconstituted platelet preparations effectively enhances diabetic wound healing.
  • This approach represents a promising strategy for managing and treating chronic or nonhealing wounds.
  • Stabilized platelet preparations offer a viable alternative to fresh platelets, overcoming storage and consistency limitations.