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Thermosensitive methyl cellulose-based injectable hydrogels for post-operation anti-adhesion.

Yongli Zhang1, Chunjuan Gao, Xiulan Li

  • 1Huanhu Hospital, Tianjin 300060, PR China.

Carbohydrate Polymers
|December 5, 2013
PubMed
Summary

Injectable thermosensitive hydrogels made from methyl cellulose (MC) effectively prevent post-surgery adhesions. These novel hydrogels, incorporating polyethylene glycol (PEG) and chitosan sulfate (CS-SO3), demonstrate significant anti-adhesion properties in animal models.

Keywords:
Anti-adhesionBiomaterialChitosanHydrogelMethyl cellulosePEG

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Surgical Innovation

Background:

  • Post-surgical adhesions are a significant clinical challenge, leading to complications and increased healthcare costs.
  • Current anti-adhesion strategies have limitations, necessitating the development of advanced materials.
  • Injectable hydrogels offer a promising minimally invasive approach for adhesion prevention.

Purpose of the Study:

  • To develop and characterize thermosensitive methyl cellulose (MC)-based injectable hydrogels for post-operative anti-adhesion applications.
  • To investigate the influence of formulation components, including polyethylene glycol (PEG), carboxymethyl cellulose (CMC), and chitosan sulfate (CS-SO3), on hydrogel properties.
  • To evaluate the efficacy of these hydrogels in reducing surgical adhesions in a preclinical model.

Main Methods:

  • MC-based sols were formulated with varying concentrations of PEG, CMC, and CS-SO3.
  • Viscosity, gelation temperature, and gel strength of the sols were characterized.
  • Gelation temperature was tuned by adjusting K+ concentration and other components to achieve body temperature transition.
  • The anti-adhesion efficacy was assessed using a rat cecal abrasion model.

Main Results:

  • Hydrogel viscosity and gelation temperature were significantly influenced by sol composition, particularly CMC content.
  • Gelation temperature was successfully modulated to achieve transformation at body temperature.
  • Incorporation of PEG enhanced gel strength by reducing macromolecular repulsions between CMC and CS-SO3.
  • The developed PEG and CS-SO3 loaded MC-based hydrogels demonstrated significant reduction in adhesion formation and improved ease of adhesiolysis in vivo.

Conclusions:

  • Thermosensitive MC-based injectable hydrogels can be effectively formulated for anti-adhesion purposes.
  • Compositional control allows tuning of critical hydrogel properties like viscosity, gelation temperature, and strength.
  • These novel hydrogels show significant promise as effective barriers against post-surgical adhesions, warranting further clinical investigation.