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Injectable bandage created

Date:
April 2, 2018
Source:
Texas A&M University
Summary:
A penetrating injury from shrapnel is a serious obstacle in overcoming battlefield wounds that can ultimately lead to death. Given the high mortality rates due to hemorrhaging, there is an unmet need to quickly self-administer materials that prevent fatality due to excessive blood loss.
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A penetrating injury from shrapnel is a serious obstacle in overcoming battlefield wounds that can ultimately lead to death.Given the high mortality rates due to hemorrhaging, there is an unmet need to quickly self-administer materials that prevent fatality due to excessive blood loss.

With a gelling agent commonly used in preparing pastries, researchers from the Inspired Nanomaterials and Tissue Engineering Laboratory have successfully fabricated an injectable bandage to stop bleeding and promote wound healing.

In a recent article "Nanoengineered Injectable Hydrogels for Wound Healing Application" published in Acta Biomaterialia, Dr. Akhilesh K. Gaharwar, assistant professor in the Department of Biomedical Engineering at Texas A&M University, uses kappa-carrageenan and nanosilicates to form injectable hydrogels to promote hemostasis (the process to stop bleeding) and facilitate wound healing via a controlled release of therapeutics.

"Injectable hydrogels are promising materials for achieving hemostasis in case of internal injuries and bleeding, as these biomaterials can be introduced into a wound site using minimally invasive approaches," said Gaharwar. "An ideal injectable bandage should solidify after injection in the wound area and promote a natural clotting cascade. In addition, the injectable bandage should initiate wound healing response after achieving hemostasis."

The study uses a commonly used thickening agent known as kappa-carrageenan, obtained from seaweed, to design injectable hydrogels. Hydrogels are a 3-D water swollen polymer network, similar to Jell-O, simulating the structure of human tissues.

When kappa-carrageenan is mixed with clay-based nanoparticles, injectable gelatin is obtained. The charged characteristics of clay-based nanoparticles provide hemostatic ability to the hydrogels. Specifically, plasma protein and platelets form blood adsorption on the gel surface and trigger a blood clotting cascade.

"Interestingly, we also found that these injectable bandages can show a prolonged release of therapeutics that can be used to heal the wound" said Giriraj Lokhande, a graduate student in Gaharwar's lab and first author of the paper. "The negative surface charge of nanoparticles enabled electrostatic interactions with therapeutics thus resulting in the slow release of therapeutics."

This research is funded by the National Science Foundation's Chemical, Bioengineering, Environmental and Transport Systems Division, and the National Institutes of Health's National Institute of Biomedical Imaging and Bioengineering.


Story Source:

Materials provided by Texas A&M University. Note: Content may be edited for style and length.


Journal Reference:

  1. Giriraj Lokhande, James K. Carrow, Teena Thakur, Janet R. Xavier, Madasamy Parani, Kayla J. Bayless, Akhilesh K. Gaharwar. Nanoengineered injectable hydrogels for wound healing application. Acta Biomaterialia, 2018; DOI: 10.1016/j.actbio.2018.01.045

Cite This Page:

Texas A&M University. "Injectable bandage created." ScienceDaily. ScienceDaily, 2 April 2018. <www.sciencedaily.com/releases/2018/04/180402160615.htm>.
Texas A&M University. (2018, April 2). Injectable bandage created. ScienceDaily. Retrieved October 10, 2024 from www.sciencedaily.com/releases/2018/04/180402160615.htm
Texas A&M University. "Injectable bandage created." ScienceDaily. www.sciencedaily.com/releases/2018/04/180402160615.htm (accessed October 10, 2024).

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