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Related Concept Videos

Modified-Release Drug Delivery Systems: Site-Targeted01:24

Modified-Release Drug Delivery Systems: Site-Targeted

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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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Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

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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: Overview01:19

Modified-Release Drug Delivery Systems: Overview

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Modified-release dosage forms are designed to address the limitations of drugs with short biological half-lives. These forms maintain stable therapeutic drug concentrations over extended periods, reducing the need for frequent dosing. A consistent drug level helps minimize peak-trough fluctuations, which can reduce adverse effects, lower the risk of drug resistance, and improve overall treatment effectiveness.One common type of modified-release form is the extended-release (ER) formulation. ER...
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Bioavailability Enhancement: Drug Permeability Enhancement01:27

Bioavailability Enhancement: Drug Permeability Enhancement

283
After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt secretion,...
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Modified-Release Drug Delivery Systems: Classification01:23

Modified-Release Drug Delivery Systems: Classification

131
Modified-release drug delivery systems improve drug efficacy and minimize side effects by controlling the rate and location of drug release. These systems fall into three categories: rate-programmed, stimuli-activated, and site-targeted.Rate-programmed systems release drugs at a predetermined rate, maintaining consistent therapeutic levels and reducing fluctuations that could lead to toxicity or subtherapeutic effects. These systems use polymeric matrices, reservoir-based designs, or osmotic...
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Modified-Release Drug Delivery Systems: Rate-Programmed II01:19

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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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Preparation and Characterization of Nanoliposomes for the Entrapment of Bioactive Hydrophilic Globular Proteins
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Liposomal Delivery Systems: Design Optimization and Current Applications.

Amr Selim Abu Lila1, Tatsuhiro Ishida

  • 1Department of Pharmacokinetics and Biopharmaceutics, Institute of Medical Biosciences, Tokushima University.

Biological & Pharmaceutical Bulletin
|January 5, 2017
PubMed
Summary

Liposomes, phospholipid vesicles, are versatile pharmaceutical carriers. Advances in liposome technology enable effective delivery of anti-cancer drugs, diagnostics, and therapeutics.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Pharmaceutical Sciences

Background:

  • Liposomes are phospholipid bilayer vesicles widely recognized as promising pharmaceutical carriers.
  • Their capacity to encapsulate diverse drug types (hydrophilic and hydrophobic) and inherent biocompatibility/biodegradability enhance their utility.
  • Significant technological advancements have expanded liposome applications.

Purpose of the Study:

  • To review the design optimization of liposomal systems.
  • To summarize the diverse applications of liposomes as advanced drug delivery vehicles.

Main Methods:

  • Review of scientific literature on liposome technology and applications.
  • Analysis of design strategies for liposomal systems.
  • Compilation of examples of liposome use in various therapeutic and diagnostic fields.

Main Results:

  • Liposomes offer a versatile platform for drug delivery due to their unique structure and properties.
  • Technical innovations like remote loading and triggered release have improved liposome functionality.
  • Liposomes are effectively utilized in anti-cancer therapies, diagnostics, and delivery of bioactive molecules.

Conclusions:

  • Liposomal systems represent a highly adaptable and effective drug delivery technology.
  • Ongoing research and development continue to expand the therapeutic potential of liposomes.
  • Optimized liposome designs are crucial for maximizing their efficacy in diverse medical applications.