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Related Concept Videos

Factors Affecting Dissolution: Particle Size and Effective Surface Area01:23

Factors Affecting Dissolution: Particle Size and Effective Surface Area

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Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are...
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Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry01:20

Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry

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Orally administered drugs primarily enter the systemic circulation via passive diffusion through the intestinal membranes. The drug's absorption is influenced by drug stability in the gastrointestinal GI tract, membrane permeability, the surface area available for absorption, luminal drug concentration, and residence time in the lumen. Drug permeability can be enhanced by adjusting the lipophilicity, polarity, or molecular size of the drug, promoting its passive transport across intestinal...
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Factors Influencing Drug Absorption: Physicochemical Parameters01:22

Factors Influencing Drug Absorption: Physicochemical Parameters

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The physicochemical characteristics of drugs play a crucial role in formulating stable and bioavailable drug products. The solubility of a drug, governed by the varying pH along the GI tract and its dissociation constant (pKa), is pivotal in determining its ionization state and absorption rate. Notably, weak acids and bases remain unionized and are absorbed more rapidly.
Enhanced drug absorption can be achieved by reducing particle sizes and increasing surface areas, thereby facilitating...
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Factors Influencing Drug Absorption: Pharmaceutical Parameters01:28

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Solid dosage forms such as tablets and capsules undergo rigorous manufacturing processes to ensure stability and effectiveness. Their dissolution and absorption properties are influenced significantly by the choice of excipients (inactive ingredients that serve various roles in the formulation), and the methodology applied during production. The manufacturing parameters, such as compression force and granulation techniques, significantly affect dissolution rates. Elevated compression forces...
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Cationic Curcumin Nanocrystals Liposomes for Improved Oral Bioavailability: Formulation Development, Optimization, In

Xiang Cheng1, Xiaoran Han1, Jia Si1

  • 1Department of Pharmacy, Jilin University, Changchun 130021, China.

Pharmaceutics
|September 28, 2024
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Summary
This summary is machine-generated.

Developing chitosan-modified curcumin nanocrystal liposomes significantly enhanced bioavailability by overcoming digestive tract barriers. This novel strategy improves the delivery of poorly soluble natural compounds like curcumin.

Keywords:
bioavailability enhancementcationic nanocrystalscurcuminmucous barrieroral absorption

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Area of Science:

  • Pharmacology
  • Materials Science
  • Nanotechnology

Background:

  • Curcumin, a polyphenol, exhibits poor water solubility and is classified as a BCS IV drug.
  • Low bioavailability limits the therapeutic efficacy of curcumin.
  • Developing advanced delivery systems is crucial for enhancing curcumin's therapeutic potential.

Purpose of the Study:

  • To develop novel curcumin nanocrystal liposomes for improved bioavailability.
  • To investigate the role of chitosan oligosaccharide in self-assembly and stability.
  • To evaluate the in vitro and in vivo performance of the developed nanocarriers.

Main Methods:

  • Preparation of cationic curcumin nanocrystals (29.42 nm).
  • Loading of nanocrystals into negatively charged liposomes.
  • Chitosan oligosaccharide modification for enhanced self-assembly.
  • In vitro and in vivo assessment of stability and bioavailability.

Main Results:

  • Successfully prepared exceptionally small cationic curcumin nanocrystals.
  • Chitosan oligosaccharide promoted the self-assembly of curcumin nanocrystal liposomes.
  • Chitosan-modified liposomes demonstrated enhanced resistance to enzymatic, mucus, and cellular barriers.
  • A 5.4-fold increase in bioavailability was observed compared to crude curcumin powder.

Conclusions:

  • Cationic nanocrystal liposomes represent a promising strategy for enhancing the dissolution and bioavailability of poorly soluble drugs.
  • Chitosan modification further improves the stability and efficacy of curcumin delivery systems.
  • The developed nanocrystal liposomes offer a novel approach for improving the therapeutic outcomes of natural products.