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Related Concept Videos

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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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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High-throughput Synthesis of Carbohydrates and Functionalization of Polyanhydride Nanoparticles
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Superselective targeting using multivalent polymers.

Galina V Dubacheva1, Tine Curk, Bortolo M Mognetti

  • 1Biosurfaces Unit, CIC biomaGUNE , Paseo Miramon 182, 20009 Donostia-San Sebastian, Spain.

Journal of the American Chemical Society
|January 10, 2014
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Summary
This summary is machine-generated.

Polymer-surface interactions are better understood using a new host/guest model. This research reveals faster-than-linear polymer binding to surfaces, driven by unique enthalpic and entropic effects.

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Area of Science:

  • Polymer science
  • Surface chemistry
  • Supramolecular chemistry

Background:

  • Multivalent polymer-surface interactions are crucial in material and life sciences but poorly understood.
  • Developing well-defined model systems is essential for mechanistic studies.

Purpose of the Study:

  • To investigate the binding behavior of functionalized polymers to surfaces with varying binding site densities.
  • To elucidate the factors governing polymer adsorption onto surfaces.

Main Methods:

  • Utilized synthetic chemistry to create hyaluronic acid functionalized with host molecules.
  • Employed tunable surfaces displaying different densities of guest molecules.
  • Combined experimental binding studies with analytical modeling.

Main Results:

  • Demonstrated a faster-than-linear increase in bound polymer density with increasing surface binding site density.
  • Observed superselective binding behavior, exceeding simple stoichiometric predictions.

Conclusions:

  • The observed superselectivity is attributed to a combination of enthalpic and entropic effects.
  • Polymer chain interpenetration significantly enhances binding affinity and density on surfaces.