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Anti-adhesive effect of poloxamer-based thermo-sensitive sol-gel in rabbit laminectomy model

  • Clinical Applications of Biomaterials
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Abstract

Poloxamer-based thermo-sensitive sol-gel has been developed to reduce the incidence of postoperative scar formation at the laminectomy site. The purpose of this study was to evaluate the anti-adhesive effect of poloxamer based thermo-sensitive sol-gel compared to hyaluronate based solution after laminectomy, using a rabbit model. A thermo-sensitive anti-adhesive with a property of sol-gel transition was manufactured by a physical mixture of Poloxamer188/407, Chitosan and Gelatin. The viscosity in different temperatures was assessed. 72 adult New Zealand rabbits underwent lumbar laminectomy and were randomly divided into experimental (treated with the newly developed agent), positive (treated with hyaluronate based solution), and negative control groups. Each group was subdivided into 1 and 4-week subgroups. Gross and histological evaluations were performed to assess the extent of epidural adhesion. The experimental group showed significantly higher viscosity compared to the positive control group and showed a significant increase of viscosity as the temperature increased. Gross evaluation showed no statistically significant differences between the 1- and 4-week subgroups. However, histologic evaluation showed significant differences both in 1- and 4-week subgroups. Although the 4-week histologic results of the experimental and the positive control subgroups showed no significant difference, both subgroups revealed higher value compared to the negative control subgroup with regard to the ratio of adhesion less than 50 %. The new poloxamer based thermo-sensitive agent showed superior efficacy over the hyaluronate based agent at 1 week postoperatively. At 4 weeks postoperatively, there were no statistically significant differences between the two agents, although both showed efficacy over the sham group.

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Acknowledgments

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2013R1A1A2061858)

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Correspondence to Jae Hyup Lee.

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No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript. Jungwon So and Kyungdan Min are employee of the CG bio.

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Institutional Animal Care and Use Committee of our institute approval was obtained for this study

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Shin, S.J., Lee, J.H., So, J. et al. Anti-adhesive effect of poloxamer-based thermo-sensitive sol-gel in rabbit laminectomy model. J Mater Sci: Mater Med 27, 162 (2016). https://doi.org/10.1007/s10856-016-5773-7

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  • DOI: https://doi.org/10.1007/s10856-016-5773-7

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