Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

How do scars form? Fascia function as a repository of mobile scar tissue

28.11.2019

Abnormal scarring is a serious threat resulting in non-healing chronic wounds or fibrosis. Scars form when fibroblasts, a type of cell of connective tissue, reach wounded skin and deposit plugs of extracellular matrix. Until today, the question about the exact anatomical origin of these fibroblasts has not been answered. In order to find potential ways of influencing the scarring process, the team of Dr. Yuval Rinkevich, Group Leader for Regenerative Biology at the Institute of Lung Biology and Disease at Helmholtz Zentrum München, aimed to finally find an answer. As it was already known that all scars derive from a fibroblast lineage expressing the Engrailed-1 gene - a lineage not only present in skin, but also in fascia - the researchers intentionally tried to understand whether or not fascia might be the origin of fibroblasts.

Fibroblasts kit - ready to heal wounds


Fascia cells (green) rising into dermal open wounds dragging their surrounding matrix (magenta).

Credit: © Helmholtz Zentrum München / Donovan Correa -Gallegos

In order to find out, they used an array of techniques including genetic lineage tracing, anatomical fate mapping, and genetic ablation, a method which in selected cells leads to apoptosis, cell death. This extinguished the fascia fibroblasts. It was discovered that no matrix was incorporated into the wounds and only abnormal and unhealthy scars with major disadvantages were formed.

In another approach the team placed a porous film beneath the skin to prevent fascia fibroblasts from migrating upwards. This, however, led to chronic open wounds. The researchers concluded that fascia contains a specialized prefabricated kit of sentry fibroblasts, embedded within a movable sealant, that preassemble together all the cell types and matrix components needed to heal wounds. They are assuming that guided homing of fascia initiates the hallmark response to external and internal injuries.

Scarring ensures survival

The new findings are important in context of ensuring survival: In mammals scarring injury induces a universal fibrotic tissue response that quickly patches wounds with scars - and thus prevents infection and bleeding to death. The hitherto tenet in wound repair was that scars form de novo by fibroblasts depositing extracellular matrix at sites of injury. With this study, the researchers could proof that scars originate from reservoirs of matrix jelly that are dragged into open wounds by sentry fibroblasts embedded in the fascia. These novel findings contradict current paradigms of how wounds repair.

New methods of scarless regenerative healing

The knowledge that fascia is the origin of scars and the finding of new mechanisms of wound repair provide a novel therapeutic space to curtail pathological fibrotic responses and induce scarless regenerative healing across a range of medical settings.

"The findings of our research give fascia tissue a new role for future science. This will shift the attention of the scientific community to not only to look at fibroblasts in the dermis but also at native cells in the fascia when researching on wound healing," says Rinkevich.

Donovan Correa-Gallegos, PhD student at Helmholtz Zentrum München and first co-author of the study, comments: "Our new findings challenge and reconfigure the traditional view of the body's matrix system of connective tissue. This is opening up a new biological concept that radiates to a variety of aspects of scar-related disease."

###

Further information

The project was funded by the Human Frontier Science Program Career Development Award, the German Research Foundation, Fritz-Thyssen-Stiftung (2016-01277) and a European Research Council Consolidator Grant. The first co-author Donovan Correa-Gallegos was supported by the Consejo Nacional de Ciencia y Tecnología (CONACYT) and Deutscher Akademischer Austauschdienst (DAAD).

Original publication

Correa-Gallegos, D. et al., 2019: Fascia is a repository of mobile scar tissue. Nature, DOI: 10.1038/s41586-019-1794-y

The Helmholtz Zentrum München, the German Research Center for Environmental Health, pursues the goal of developing personalized medical approaches for the prevention and therapy of major common diseases such as diabetes, allergies and lung diseases. To achieve this, it investigates the interaction of genetics, environmental factors and lifestyle. The Helmholtz Zentrum München is headquartered in Neuherberg in the north of Munich and has about 2,500 staff members. It is a member of the Helmholtz Association, a community of 19 scientific-technical and medical-biological research centers with a total of about 37,000 staff members. http://www.helmholtz-muenchen.de/en

The Comprehensive Pneumology Center (CPC) is a joint research project of the Helmholtz Zentrum München, the Ludwig-Maximilians-Universität Clinic Complex and the Asklepios Fachkliniken München-Gauting. The CPC's objective is to conduct research on chronic lung diseases in order to develop new diagnosis and therapy strategies. The CPC maintains a focus on experimental pneumology with the investigation of cellular, molecular and immunological mechanisms involved in lung diseases. The CPC is a site of the Deutsches Zentrum für Lungenforschung (DZL). http://www.helmholtz-muenchen.de/ilbd

Yuval Rinkevich | EurekAlert!

Further reports about: Environmental Environmental Health Helmholtz lung diseases open wounds

More articles from Health and Medicine:

nachricht Body's natural signal carriers can help melanoma spread
21.01.2020 | University of Eastern Finland

nachricht Refining Breast Cancer Classification by Multiplexed Imaging
21.01.2020 | Universität Zürich

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A new look at 'strange metals'

For years, a new synthesis method has been developed at TU Wien (Vienna) to unlock the secrets of "strange metals". Now a breakthrough has been achieved. The results have been published in "Science".

Superconductors allow electrical current to flow without any resistance - but only below a certain critical temperature. Many materials have to be cooled down...

Im Focus: Programmable nests for cells

KIT researchers develop novel composites of DNA, silica particles, and carbon nanotubes -- Properties can be tailored to various applications

Using DNA, smallest silica particles, and carbon nanotubes, researchers of Karlsruhe Institute of Technology (KIT) developed novel programmable materials....

Im Focus: Miniature double glazing: Material developed which is heat-insulating and heat-conducting at the same time

Styrofoam or copper - both materials have very different properties with regard to their ability to conduct heat. Scientists at the Max Planck Institute for Polymer Research (MPI-P) in Mainz and the University of Bayreuth have now jointly developed and characterized a novel, extremely thin and transparent material that has different thermal conduction properties depending on the direction. While it can conduct heat extremely well in one direction, it shows good thermal insulation in the other direction.

Thermal insulation and thermal conduction play a crucial role in our everyday lives - from computer processors, where it is important to dissipate heat as...

Im Focus: Fraunhofer IAF establishes an application laboratory for quantum sensors

In order to advance the transfer of research developments from the field of quantum sensor technology into industrial applications, an application laboratory is being established at Fraunhofer IAF. This will enable interested companies and especially regional SMEs and start-ups to evaluate the innovation potential of quantum sensors for their specific requirements. Both the state of Baden-Württemberg and the Fraunhofer-Gesellschaft are supporting the four-year project with one million euros each.

The application laboratory is being set up as part of the Fraunhofer lighthouse project »QMag«, short for quantum magnetometry. In this project, researchers...

Im Focus: How Cells Assemble Their Skeleton

Researchers study the formation of microtubules

Microtubules, filamentous structures within the cell, are required for many important processes, including cell division and intracellular transport. A...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

11th Advanced Battery Power Conference, March 24-25, 2020 in Münster/Germany

16.01.2020 | Event News

Laser Colloquium Hydrogen LKH2: fast and reliable fuel cell manufacturing

15.01.2020 | Event News

„Advanced Battery Power“- Conference, Contributions are welcome!

07.01.2020 | Event News

 
Latest News

A new look at 'strange metals'

21.01.2020 | Materials Sciences

Body's natural signal carriers can help melanoma spread

21.01.2020 | Health and Medicine

Structual color barcode micromotors for multiplex biosensing

21.01.2020 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>