Related Experiment Video
Updated: Aug 11, 2026

04:30
A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis
Published on: May 14, 2013
Prevention of Restenosis by Local Drug Delivery
Journal of Cardiovascular Pharmacology and Therapeutics
|April 1, 1996
Summary
Local drug delivery via catheters and stents is being explored to prevent restenosis after angioplasty. Various methods enhance drug retention, with local therapy poised to become essential.
Area of Science:
- Cardiovascular medicine
- Biomaterials science
- Pharmacology
Background:
- Restenosis after angioplasty remains a clinical challenge.
- Local drug delivery aims to improve therapeutic efficacy and reduce systemic side effects.
- Various drug carriers and delivery systems have been developed.
Purpose of the Study:
- To review current strategies for local drug delivery to prevent restenosis post-angioplasty.
- To discuss the role of different delivery devices and carriers.
- To highlight the future potential of local drug therapy in cardiovascular interventions.
Main Methods:
- Review of existing literature on local drug delivery for restenosis prevention.
- Analysis of various drug carriers including microspheres, liposomes, and polymers.
- Evaluation of stent-based local drug delivery approaches (e.g., coatings, cell seeding, radiation).
Main Results:
- Local drug delivery using catheters has been investigated for over ten years.
- Microspheres, liposomes, and polymers enhance drug retention at the delivery site.
- Stents are emerging as platforms for local drug delivery, radiation, or cell-based therapy.
Conclusions:
- Local drug delivery is a promising strategy for preventing restenosis after angioplasty.
- While optimal methods are still under investigation, local therapy is expected to be crucial in future cardiovascular treatments.
Related Concept Videos
Drug Distribution: Tissue Binding
Upon entering the systemic circulation, drugs can distribute into the interstitial and intracellular fluid of various tissue cells. This distribution is facilitated by the binding of drugs to different cellular components within tissues, which may lead to drug accumulation in specific areas. Drugs bound to tissue components serve as reservoirs that release free drugs back into the system, prolonging the drug's overall action. However, this accumulation can also result in local toxicity.
For...
For...
Modified-Release Drug Delivery Systems: Rate-Programmed II
Rate-programmed drug delivery systems release drugs in a controlled manner to maintain therapeutic levels. Three main designs include reservoir, matrix, and hybrid systems.Reservoir systems consist of a drug core enclosed within a membrane that controls drug release. In non-swelling reservoir systems, polymers like ethyl cellulose or polymethacrylates are used. These do not hydrate in aqueous media and control release through membrane thickness, porosity, or insolubility. This type includes...
Modified-Release Drug Delivery Systems: Stimuli-Activated
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 called...
Modified-Release Drug Delivery Systems: Site-Targeted
Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.
Site-Targeted Drug Delivery Systems: Polymeric Carriers
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...
Peripheral Artery Disease III: Interprofessional Care
Peripheral Artery Disease (PAD) is characterized by narrowed arteries that diminish blood flow to the extremities. Effective management of PAD requires an interprofessional approach involving various healthcare professionals. The critical aspects of interprofessional care for PAD patients focus on risk factor modification, drug therapy, exercise therapy, nutrition therapy, critical limb ischemia care, and interventional radiology and surgical procedures.The primary treatment goal for PAD...

