Laser welding of ruptured intestinal tissue using plasmonic polypeptide nanocomposite solders
| Autor: | Candace Rae Walker, Huang-Chiao Huang, Alisha Nanda, Kaushal Rege |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Swine General Physics and Astronomy Nanotechnology Welding In Vitro Techniques law.invention law Ultimate tensile strength Intestine Small Animals General Materials Science Leakage (electronics) Rupture Nanocomposite technology industry and agriculture General Engineering Laser beam welding Hyperthermia Induced Surface Plasmon Resonance Laser Nanostructures Treatment Outcome Nanorod Laser Therapy Peptides Ex vivo Biomedical engineering |
| Zdroj: | ACS nano. 7(4) |
| ISSN: | 1936-086X |
| Popis: | Approximately 1.5 million people suffer from colorectal cancer and inflammatory bowel disease in the United States. Occurrence of leakage following standard surgical anastomosis in intestinal and colorectal surgery is common and can cause infection leading to life-threatening consequences. In this report, we demonstrate that plasmonic nanocomposites, generated from elastin-like polypeptides (ELPs) cross-linked with gold nanorods, can be used to weld ruptured intestinal tissue upon exposure to near-infrared (NIR) laser irradiation. Mechanical properties of these nanocomposites can be modulated based on the concentration of gold nanorods embedded within the ELP matrix. We employed photostable, NIR-absorbing cellularized and noncellularized GNR-ELP nanocomposites for ex vivo laser welding of ruptured porcine small intestines. Laser welding using the nanocomposites significantly enhanced the tensile strength, leakage pressure, and bursting pressure of ruptured intestinal tissue. This, in turn, provided a liquid-tight seal against leakage of luminal liquid from the intestine and resulting bacterial infection. This study demonstrates the utility of laser tissue welding using plasmonic polypeptide nanocomposites and indicates the translational potential of these materials in intestinal and colorectal repair. |
| Databáze: | OpenAIRE |
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