AIP Publishing LLC
AIP Publishing LLC
  • pubs.aip.org
  • AIP
  • AIP China
  • University Science Books
  • Resources
    • Researchers
    • Librarians
    • Publishing Partners
    • Topical Portfolios
    • Commercial Partners
  • Publications

    Find the Right Journal

    Explore the AIP Publishing collection by title, topic, impact, citations, and more.
    Browse Journals

    Latest Content

    Read about the newest discoveries and developments in the physical sciences.
    See What's New

    Publications

    • Journals
    • Books
    • Physics Today
    • AIP Conference Proceedings
    • Scilight
    • Find the Right Journal
    • Latest Content
  • About
    • About Us
    • News and Announcements
    • Careers
    • Events
    • Leadership
    • Contact
  • pubs.aip.org
  • AIP
  • AIP China
  • University Science Books

Simulating Cuts and Burns Reveals Wound Healing and Clearing Power of Fibroblasts

  • March 14, 2023
  • APL Bioengineering
  • News
Share:

Therapies that build on the natural tissue clearance by fibroblasts may accelerate healing, especially in slow-to-heal burn wounds.

From the Journal: APL Bioengineering

Dermal microtissues are ablated using a pulsed laser. Damaged extracellular matrix is cleared by dermal fibroblasts in the vicinity of the wound edge through phagocytosis. Created with BioRender.com. Credit: Jeroen Eyckmans and Anish Vasan
Dermal microtissues are ablated using a pulsed laser. Damaged extracellular matrix is cleared by dermal fibroblasts in the vicinity of the wound edge through phagocytosis. Created with BioRender.com. Credit: Jeroen Eyckmans and Anish Vasan

WASHINGTON, March 14, 2023 – Burn wounds are notoriously prone to bacterial infection and typically lead to a larger amount of scar tissue than laceration wounds.

In APL Bioengineering, by AIP publishing, researchers from Boston University and Harvard University created a biomimetic model to study wound healing in burn and laceration wounds. They discovered that fibroblasts – normally considered building cells that give shape and strength to tissues and organs – clear away damaged tissue before depositing new material. This part of the healing process is slower in burn wounds, where more tissue damage is present.

Cell biologists identify four phases of wound healing: bleeding stoppage, inflammation, new tissue formation, and tissue strengthening. During the inflammation and formation stages, immune cells are thought to clear bacteria and dead cells from the wound. They also activate fibroblasts and blood vessels to begin repairs.

“Depending on the injury, the extent and duration of these four phases can wildly vary across different wound types,” said author Jeroen Eyckmans. “Given that laceration wounds are well perfused with blood, they tend to heal well. However, in burns, the blood vessels are cauterized, preventing blood from entering the wound bed and slowing down the healing process. Severe burn wounds also have large amounts of dead tissue that physically block new tissue formation.”

To study how the mode of injury impacts the healing rate of wounds, the team designed an in vitro model system made of fibroblasts embedded in a collagen hydrogel. Wounds were created in this microtissue using a microdissection knife to mimic laceration or a high-energy laser to simulate a burn.

Although both wound types were equal in size, laser ablation caused more cell death and tissue damage next to the wound margins compared to knife wounds.

“During healing, we found that the fibroblasts first cleared the damaged material from the wound before depositing new material,” said Eyckmans. “This was a surprising finding because removal of dead tissue has been attributed to specialized immune cells such as macrophages, and fibroblasts have been considered to be tissue-building cells, not tissue-removal cells.”

Given that there was more tissue damage in the laser ablation wounds, it took fibroblasts more time to remove the damage, ultimately delaying tissue healing.

Based on these findings, therapies that promote wound clearance could accelerate healing. Genetically engineered white blood cells, designed to remove dead tissue, could be particularly useful for reaching injured organs and tissues deep in the body.

###

Article Title

Fibroblast clearance of damaged tissue following laser ablation in engineered microtissues

Authors

Megan Elizabeth Griebel, Anish Vasan, Christopher S. Chen, and Jeroen Eyckmans

Author Affiliations

Boston University, Harvard University


APL Bioengineering

APL Bioengineering is devoted to research at the intersection of biology, physics, and engineering. The journal publishes high-impact manuscripts specific to the understanding and advancement of physics and engineering of biological systems. APL Bioengineering is the new home for the bioengineering and biomedical research communities.

https://aip.scitation.org/journal/apb

Share:
  • Fighting Intolerance with Physics
  • Cleaning Up the Atmosphere with Quantum Computing

Keep Up With AIP Publishing

Sign up for the AIP newsletter to receive the latest news and information from AIP Publishing.
Sign Up

AIP PUBLISHING

1305 Walt Whitman Road,
Suite 110
Melville, NY 11747
(516) 576-2200

Resources

  • Researchers
  • Librarians
  • Publishing Partners
  • Commercial Partners

About

  • About Us
  • Careers 
  • Leadership

Support

  • Contact Us
  • Terms Of Use
  • Privacy Policy

© 2025 AIP Publishing LLC
  • 𝕏