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Nitric Oxide Signaling Pathway01:28

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Stimuli-activated drug delivery systems are designed to release drugs in response to specific physical, chemical, or biological stimuli. These systems often utilize hydrogels—three-dimensional, hydrophilic polymer networks capable of swelling in aqueous environments and retaining significant fluid volumes. Upon exposure to particular stimuli, these hydrogels undergo structural transitions that allow the embedded drug to be released. Due to this adaptive behavior, such systems are also...
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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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Photo-crosslinked Biodegradable Elastomers for Controlled Nitric Oxide Delivery.

Ying Wang1, Melina R Kibbe2, Guillermo A Ameer3

  • 1Biomedical Engineering Department, Northwestern University, Evanston, IL 60208.

Biomaterials Science
|April 8, 2014
PubMed
Summary

Researchers developed new biodegradable elastomers that slowly release nitric oxide (NO) for medical use. These photo-curable materials show promise for treating vascular conditions like thrombosis and restenosis.

Keywords:
biodegradationcell proliferationelastomernitric oxidephoto-polymerization

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Medical Devices

Background:

  • Nitric oxide (NO) delivery is crucial in vascular medicine.
  • Existing NO delivery methods face challenges in sustained and localized release.

Purpose of the Study:

  • To develop photo-curable, biodegradable elastomers for sustained nitric oxide (NO) release.
  • To evaluate the mechanical properties, cell compatibility, and therapeutic potential of these NO-releasing materials.

Main Methods:

  • Synthesized methacrylated poly(diol citrate) macromonomers.
  • Incorporated a nitric oxide donor into the polymer matrix.
  • Fabricated elastomeric networks via photo-polymerization and tested mechanical strength, biodegradability, and NO release kinetics.
  • Assessed effects of NO release on endothelial and smooth muscle cell proliferation.

Main Results:

  • Developed photo-curable, biodegradable poly(diol citrate) elastomers capable of slow NO release.
  • Achieved sustained NO release for over a week under physiological conditions.
  • Demonstrated strong mechanical properties (tensile and compressive strength) and good cell compatibility.
  • Observed NO-enhanced endothelial cell proliferation and inhibited smooth muscle cell proliferation.

Conclusions:

  • Photo-polymerizable NO-releasing elastomers offer a novel approach for localized and sustained NO delivery.
  • These materials hold potential for treating vascular diseases such as thrombosis and restenosis.
  • The tunable NO release profile and mechanical properties make them versatile for biomedical applications.