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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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Bioavailability Enhancement: Drug Permeability Enhancement01:27

Bioavailability Enhancement: Drug Permeability Enhancement

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Body: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...
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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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Bioavailability Enhancement: Drug Stability Enhancement and GI Retention01:05

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Body: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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Carrier-Mediated Transport01:06

Carrier-Mediated Transport

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Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
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Related Experiment Video

Updated: Mar 2, 2026

Preparation and Characterization of Nanoliposomes for the Entrapment of Bioactive Hydrophilic Globular Proteins
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Liposomal systems as carriers for bioactive compounds.

Ana Maria Sper Simão1, Maytê Bolean1, Thuanny Alexandra Campos Cury1

  • 1Departmento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto (FFCLRP), Universidade de São Paulo (USP), Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brazil.

Biophysical Reviews
|May 17, 2017
PubMed
Summary

Liposomes, versatile phospholipid vesicles, are crucial in biotechnology for drug delivery. Their biocompatibility and ability to carry diverse compounds enable targeted therapies with reduced side effects.

Keywords:
BiotechnologyCarrierDeliveryDrugsLiposome

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Area of Science:

  • Biotechnology
  • Materials Science
  • Nanotechnology

Background:

  • Phospholipids self-assemble into bilayer structures (liposomes) in aqueous environments.
  • Liposomes exhibit high biocompatibility and versatility, leading to widespread applications.
  • Liposomes facilitate the internalization of both hydrophilic and lipophilic compounds.

Purpose of the Study:

  • To explore the potential of liposomes in biotechnology and medicine.
  • To understand liposome interactions with cellular components for risk assessment.
  • To highlight liposomes as advanced drug delivery systems.

Main Methods:

  • Liposome preparation and characterization.
  • Assays for evaluating compound encapsulation (hydrophilic/lipophilic).
  • Cellular interaction and toxicity studies.

Main Results:

  • Liposomes demonstrate efficient encapsulation of diverse molecules.
  • Biocompatibility and biodegradability are key advantages.
  • Targeted delivery reduces undesirable side effects.

Conclusions:

  • Liposomes are invaluable tools in applied biotechnology.
  • Their properties enable safe and effective delivery of bioactive substances.
  • Further research can optimize liposomal formulations for enhanced therapeutic outcomes.