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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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Rational drug product design integrates knowledge of the drug’s physicochemical properties, formulation components, manufacturing techniques, and intended route of administration. Each factor influences the drug’s performance, including how it is released, absorbed, and eliminated in the body.The physicochemical properties of a drug—such as solubility, stability, and particle size—affect its compatibility with excipients and the choice of dosage form. Excipients, though...
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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.
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Drug Delivery Systems: Different Types01:27

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Conventional oral drug products, termed immediate-release (IR) formulations, are engineered to promptly release their active pharmaceutical ingredient (API) upon ingestion, typically in tablets or capsules. This rapid release often results in swift drug absorption and consequent pharmacodynamic effects, although the timing and intensity can vary depending on the drug's properties. Prodrugs within these formulations require metabolic conversion to activate their pharmacodynamic effects,...
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Modified-Release Drug Delivery Systems: Influencing Factors01:20

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Modified-release drug delivery systems are designed to optimize the therapeutic effect of drugs by minimizing side effects, reducing the dosage required, and controlling drug release to align with pharmacokinetic and pharmacodynamic needs. The system depends on two key factors: the drug's release from the formulation and its movement through the body to the target site. Unlike conventional dosage forms, where absorption is the limiting step, the rate of drug release is the key determinant in...
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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...
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Tools for Surface Treatment of Silicon Planar Intracortical Microelectrodes
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Recent developments in drug eluting devices with tailored interfacial properties.

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  • 1University of The Basque Country (UPV/EHU), Department of Mining-Metallurgy Engineering and Materials Science & POLYMAT, School of Engineering, Alameda Urquijo s/n, 48013 Bilbao, Spain.

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Advancements in drug-eluting devices utilize micro/nanotechnology for controlled drug release and enhanced healing. These engineered surfaces improve biological interactions for medical implants across various body systems.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Nanotechnology

Background:

  • Drug-eluting devices have evolved from bare metal to drug-loaded systems for controlled local therapeutic concentrations.
  • Modern devices incorporate micro- and nanoscale surface features to influence cellular and subcellular functions.
  • These engineered surfaces mimic natural antifouling mechanisms and promote specific biological responses.

Purpose of the Study:

  • To review recent trends in drug-eluting device development.
  • To discuss advancements in micro/nanotechnology for medical devices.
  • To identify future challenges in the field of drug-eluting implants.

Main Methods:

  • Review of current literature on drug-eluting devices and micro/nanotechnology.
  • Categorization of devices based on the body systems they target (orthopedic, cardiovascular, etc.).
  • Analysis of surface engineering techniques and their impact on biological interactions.

Main Results:

  • Drug-eluting devices offer sustained drug release, improving therapeutic efficacy.
  • Micro/nanoscale surface features significantly impact cellular functions, promoting desired biological responses like osteointegration.
  • Engineered surfaces can enhance healing and reduce complications like fouling.

Conclusions:

  • Drug-eluting devices with engineered micro/nanoscale surfaces represent a significant advancement in medical implants.
  • Continued research in nanotechnology is crucial for designing next-generation implants that promote controlled and rapid healing.
  • Future challenges include optimizing surface designs for specific applications and ensuring long-term biocompatibility and efficacy.