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Thioketal-Based Polymers for Biomedical Applications: Structure Design, Properties, And Perspectives.

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Thioketal (TK) polymers offer controlled degradation in high reactive oxygen species (ROS) environments. These ROS-responsive materials show promise for targeted drug delivery and tissue regeneration applications.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Reactive oxygen species (ROS) accumulate in pathological conditions like inflammation and tumors.
  • Elevated ROS levels can be leveraged as an endogenous trigger for therapeutic interventions.
  • Thioketal (TK) moieties provide a stable linkage under normal conditions, cleaving in the presence of ROS.

Purpose of the Study:

  • To summarize the design strategies, structure-property relationships, and biomedical applications of TK-based polymers.
  • To highlight challenges and propose future perspectives for TK-based polymer translation.
  • To explore the potential of TK polymers for ROS-triggered drug delivery and tissue engineering.

Main Methods:

  • Fabrication of TK-based polymers into various architectures (hydrogels, nanoparticles, fibers, scaffolds).
  • Tuning polymer properties by adjusting TK content, hydrophilic-hydrophobic balance, and branching.
  • Evaluation of degradation kinetics, mechanical properties, and drug-release profiles.
  • Assessment of synergistic ROS-scavenging and stimulus-responsive release in disease models.

Main Results:

  • TK-based polymers demonstrate tunable degradation and drug release in response to ROS.
  • Diverse material formats (hydrogels, nanoparticles, etc.) exhibit controlled performance.
  • Successful application in preclinical models for acute lung injury, wound repair, myocardial infarction, and spinal cord injury.
  • Demonstrated synergistic ROS-scavenging and targeted release capabilities.

Conclusions:

  • TK-based polymers represent a versatile platform for ROS-responsive biomaterials.
  • Further research is needed to address ROS heterogeneity in vivo, byproduct biosafety, and scalable synthesis.
  • Significant potential exists for clinical and industrial translation of TK polymers for regenerative medicine and targeted therapies.