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Biopharmaceutical Factors Influencing Drug Product Design: Overview01:22

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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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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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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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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...
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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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Related Experiment Video

Updated: May 6, 2026

Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles
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Rational Design of Coordination Polymers Composited Hollow Multishelled Structures for Drug Delivery.

Qian Xiao1,2,3, Lingling Shang1,2,3, Yang Peng4

  • 1State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China.

Small Methods
|April 28, 2024
PubMed
Summary

Researchers developed novel hollow multishelled structures (HoMS) using iron-based coordination polymers for advanced drug delivery systems. These systems offer synergistic chemotherapy and chemodynamic therapy, effectively targeting cancer cells with minimal impact on normal cells.

Keywords:
coordination polymerdrug delivery systemshollow multishelled structuremetal‐organic framework templatemultifunctional material

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Multifunctional drug delivery systems (DDS) are crucial for targeted cancer therapy, requiring biocompatibility and controlled release.
  • Hollow multishelled structures (HoMS) offer a promising platform for developing efficient DDS due to their tunable architecture.

Purpose of the Study:

  • To fabricate novel amorphous coordination polymer (CP) composited HoMS from Fe-based metal-organic frameworks.
  • To develop a multifunctional DDS for synergistic chemotherapy and chemodynamic therapy against cancer.

Main Methods:

  • Fabrication of Fe-CP HoMS by controlling MOF decomposition and shell formation rates.
  • Loading doxorubicin (DOX) onto Fe-CP HoMS for drug delivery.
  • Evaluation of pH-triggered drug release, drug loading capacity, and catalytic activity for reactive oxygen species (ROS) generation.
  • Assessment of in vitro cytotoxicity and anti-cancer efficacy of DOX@3S-Fe-CP-HoMS.

Main Results:

  • Achieved controlled shell numbers in Fe-CP HoMS with a high DOX loading capacity (284 mg g⁻¹).
  • Demonstrated excellent pH-triggered DOX release (82% within 72 h at pH 5.0).
  • Fe-CP-HoMS effectively catalyzed H₂O₂ to generate ·OH species for chemodynamic therapy.
  • DOX@3S-Fe-CP-HoMS showed significant cancer cell inhibition (12.5 µg mL⁻¹) with minimal normal cell toxicity.

Conclusions:

  • CP-HoMS represent a viable and biocompatible platform for advanced intelligent drug delivery systems.
  • The developed DDS enables synergistic chemo- and chemodynamic therapy for enhanced cancer treatment.
  • This approach holds potential for future cancer therapy innovations.