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Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

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Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Hyperbranched Self-Immolative Polymers (hSIPs) for Programmed Payload Delivery and Ultrasensitive Detection.

Guhuan Liu1, Guofeng Zhang1,2, Jinming Hu1

  • 1CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, iChem (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Polymer Science and Engineering, University of Science and Technology of China , Hefei, Anhui 230026, China.

Journal of the American Chemical Society
|September 2, 2015
PubMed
Summary
This summary is machine-generated.

Researchers developed hyperbranched self-immolative polymers (hSIPs) for controlled drug delivery and sensing. These novel materials offer tunable amplified release triggered by various stimuli, expanding the potential of self-immolative polymers.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Self-immolative dendrimers (SIDs) and linear polymers (l-SIPs) are stimuli-responsive materials known for signal amplification.
  • Advancements in self-immolative polymers (SIPs) require novel design principles.
  • Existing SIPs often lack versatility in triggered release mechanisms and applications.

Purpose of the Study:

  • To report the facile fabrication of water-dispersible hyperbranched self-immolative polymers (hSIPs).
  • To demonstrate the modular engineering of hSIPs for diverse structures and functions.
  • To explore the potential of the hSIP platform in drug delivery, sensing, and biosensing.

Main Methods:

  • One-pot AB2 polycondensation and sequential postfunctionalization were used to synthesize hSIPs.
  • Modular engineering involved varying branching scaffolds, stimuli-cleavable capping moieties, and peripheral functional groups.
  • Applications were explored using visible light, reductive environments, and enzyme-mediated amplification.

Main Results:

  • Structurally and functionally diverse hSIPs with tunable amplified-release features were successfully fabricated.
  • Visible light-triggered intracellular drug release, DNA delivery, and H2O2 sensing (down to ~20 nM) were demonstrated.
  • hSIPs were integrated into a biosensor for ultrasensitive antigen detection using ELISA and enzyme-mediated amplification.

Conclusions:

  • The developed hSIP platform offers a versatile and modular approach for creating advanced stimuli-responsive materials.
  • hSIPs exhibit significant potential for applications in targeted drug delivery, intracellular sensing, and highly sensitive biosensing.
  • This work provides a new avenue for designing next-generation self-immolative polymers with amplified and tunable release capabilities.