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Robust Sealing of Blood Vessels with Cholesteryl Group-Modified, Alaska Pollock-Derived Gelatin-Based Biodegradable Sealant Under Wet Conditions

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A novel surgical sealant was developed by partially modifying the amino groups of Alaska pollock-derived gelatin derivative with cholesteryl groups (Chol-apGltn), which was combined with the crosslinker, pentaerythritol poly(ethylene glycol) ether tetrasuccinimidyl glutarate (4S-PEG). The burst strength of the resultant sealant was tested using fresh porcine aorta as an adherend. The Chol-apGltn/4S-PEG sealant cured within 25.4 ± 2.0 s. Burst strength increased with increasing degree of Chol modification up to a maximum value of 8.3 mol% (8.3Chol-apGltn). The highest burst strength of the 8.3Chol-apGltn/4S-PEG sealant was 341.3 ± 77.5 mmHg, which was 3.5- and 11.6-fold higher than that of the original apGltn/4S-PEG and commercial fibrin sealants, respectively. The 8.3Chol-apGltn/4S-PEG sealant swelled only slightly in solution (1.1-fold as compared to commercially prepared sealant). Furthermore, tissue migration into the 8.3Chol-apGltn/4S-PEG sealant and subsequent biodegradation was observed following implantation for 4–8 weeks. These results suggest that the 8.3Chol-apGltn/4S-PEG sealant has biomedical applications, including use in cardiovascular and thoracic surgery.
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Document Type: Research Article

Publication date: January 1, 2016

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  • Journal of Biomedical Nanotechnology (JBN) is a peer-reviewed multidisciplinary journal providing broad coverage in all research areas focused on the applications of nanotechnology in medicine, drug delivery systems, infectious disease, biomedical sciences, biotechnology, and all other related fields of life sciences.
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