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Bioavailability Enhancement: Drug Stability Enhancement and GI Retention01:05

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Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
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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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Modified-Release Drug Delivery Systems: Stimuli-Activated

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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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Updated: Mar 9, 2026

Ferromagnetic Bare Metal Stent for Endothelial Cell Capture and Retention
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Current State of Bioabsorbable Polymer-Coated Drug-Eluting Stents.

Abhilash Akinapelli1, Jack P Chen2, Kristine Roy3

  • 1Creighton University Medical Center, Omaha, NE, United States.

Current Cardiology Reviews
|December 27, 2016
PubMed
Summary
This summary is machine-generated.

Biodegradable polymer drug-eluting stents (DES) offer improved arterial healing compared to permanent polymer DES. This may reduce late clinical events and the need for long-term dual antiplatelet therapy.

Keywords:
BMSBioabsorbable polymerabluminal coatingclinical trialsdrug-eluting stent.

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Area of Science:

  • Cardiovascular Medicine
  • Biomaterials Science
  • Interventional Cardiology

Background:

  • Drug-eluting stents (DES) effectively reduce restenosis compared to bare metal stents (BMS).
  • Permanent polymers in DES can cause delayed healing and hypersensitivity, potentially increasing late clinical event risk.
  • Chronic inflammation and neoatherosclerosis are linked to permanent polymer coatings.

Purpose of the Study:

  • To review bioabsorbable polymer-coated DES evaluated in clinical trials.
  • To explore the potential benefits of biodegradable polymers in improving arterial healing and reducing late adverse events.
  • To assess if biodegradable polymers can mitigate risks associated with permanent polymer DES.

Main Methods:

  • Review of clinical trial data for bioabsorbable polymer-coated DES.
  • Analysis of mechanisms by which biodegradable polymers may enhance arterial healing.
  • Comparison of outcomes between biodegradable and permanent polymer DES.

Main Results:

  • Biodegradable polymers degrade after drug elution, leaving an inert scaffold.
  • This degradation may promote better arterial healing by removing chronic inflammatory sources.
  • Potential reduction in neoatherosclerosis, late thrombosis, and associated ischemic events.

Conclusions:

  • Bioabsorbable polymer DES show promise for improved vascular healing.
  • Degradable polymers may reduce the risk of late stent-related complications.
  • Improved healing could potentially shorten the duration of dual antiplatelet therapy, reducing bleeding risks and costs.