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A Revolution in Wound Healing: Scientists Develop Durable, Flexible Bio-Glue

Theresa Casimir by Theresa Casimir
August 2, 2017
in Education
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In a remarkable leap forward in the medical field, researchers have recently developed an adhesive, flexible, and robust bio-glue that is promising to revolutionize how wounds are treated. Drawing inspiration from a rather unexpected source, the sticky substance secreted by slugs, the group of scientists has formulated a material that can adhere to biological tissues, all without causing any toxic harm to the body.

The standout feature of this innovative bio-glue is its biocompatibility, and its extraordinary ability to bind with any kind of tissues similar to the body’s resilient cartilage. This capacity enables it to heal wounds effectively when applied.

As explained by Dave Mooney, a professor at the Paulson School of Engineering and Applied Sciences in Harvard University, “The key feature of our material is the combination of a very strong adhesive force and the ability to transfer and dissipate stress, which have historically not been integrated into a single adhesive.”

The adhesive properties of this bio-glue can be attributed to specialised polymers developed to bond securely with biological tissues. Employing a three-fold mechanism, this glue’s components include an electrostatic attraction to negatively charged cell surfaces, covalent bonds existing between neighboring atoms, and a physical interpenetration that amplifies the adhesive’s strength and durability.

The pioneering matrix for the glue, as reported by the researchers, was initially composed of a tough mix peppered with positively charged proteins. This inventive blend was conceived collaboratively, spearheaded by Jianyu Li, an assistant professor at McGill University in Canada. Together with a dedicated team of colleagues, Li helped create a double-layered hydrogel. This innovative composition consists of an alginate polyacrylamide matrix – the stronghold that supports the adhesive layer housing the positively charged polymers.

A series of rigorous experiments showcased the adhesive’s performance under different conditions. These included tests conducted on both dry and wet body tissues from diverse species, ranging from dry skin to internal organs such as the heart, cartilage, and even on liver tissue. The results were, to say the least, remarkable. The experimental material bound all the torn tissues with an impressive strength that surpassed other medical adhesives currently used in the field.

These significant experiments and their findings were published in a noted U.S. science journal. The studies outline exhaustive tests on body tissues from mice, rats, and pigs, during which the adhesive was used surgically to seal a hole in a pig’s heart. Its stability and bonding capacities maintained remarkably well, causing no tissue damage and refraining from leaving residual stickiness on the affected area.

Excitingly, the initial experiments suggest the new bio-glue’s potential extends to tackling tasks such as patching tissue surfaces or mending deep wounds. The adhesive appears to have no negative side effects and demonstrates impressive persistence in sticking to tissues when applied on it. This bio-glue seems poised to herald in a new era for wound healing in the near future.

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Theresa Casimir

Theresa Casimir

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