Engineering 101

Surgical Smart Glues Made by Welding Stem Cells

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Scientists at the University of Bristol have invented a new technology that could lead to the development of a new generation of smart surgical glues and dressings for chronic wounds. The new method involves re-engineering the membranes of stem cells to effectively “weld” the cells together.

Cell membrane re-engineering is emerging as a powerful tool for the development of next-generation cell therapies because it allows scientists to provide additional functions in the therapeutic cells, such as homing, adhesion or hypoxia (low oxygen) resistance. At the moment, there are not many examples of instances where the cell membrane is re-engineered to display active enzymes that drive extracellular matrix production, which is an essential process in wound healing.

During the course of the research, conducted by Dr. Adam Perriman and colleagues, the team modified the membrane of human mesenchymal stem cells (hMSCs) with an enzyme, known as thrombin, which is involved in the wound healing process.  When the modified cells were placed in a solution containing the blood protein fibrinogen, they automatically welded together through the growth of a natural hydrogel from the surface of the cells. The researchers have also shown that the resulting 3D cellular structures could be used for tissue engineering.

“One of the biggest challenges in cell therapies is the need to protect the cells from aggressive environments after transplantation. We have developed a completely new technology that allows cells to grow their own artificial extracellular matrix, enabling cells to protect themselves and allowing them to thrive after transplantation,” said Dr. Adam Perriman, Associate Professor in Biomaterials in the School of Cellular and Molecular Medicine.

The team’s findings could increase the possibilities in tissue engineering for chronic wound healing, especially because the process uses fibrinogen, which is abundant in blood.

The new method of the conversion of natural enzymes into membrane binding proteins could pave the way for the development of a wide range of new biotechnologies.

Story via University of Bristol.

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