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Interaction of iodine with 2-hydroxypropyl-alpha-cyclodextrin and its bactericidal activity
1College of Pharmacy, Nihon University, 7-1, Narashinodai 7-chome Funabashi-shi, Chiba 247-8555, Japan. tomono@pha.nihon-u.ac.jp
Drug Development and Industrial Pharmacy
|December 13, 2002
Summary
2-hydroxypropyl-alpha-cyclodextrin (2-HP-alpha-CD) enhances iodine solution stability and efficacy. This cyclodextrin derivative shows superior iodine complexation and volatility reduction, matching bactericidal activity of other systems.
Area of Science:
- Pharmaceutical Chemistry
- Materials Science
Background:
- Iodine solutions are crucial antiseptics but can be unstable.
- Cyclodextrins are known to stabilize various compounds through inclusion complexation.
Purpose of the Study:
- To evaluate 2-hydroxypropyl-alpha-cyclodextrin (2-HP-alpha-CD) as a solubilizer for iodine.
- To compare its performance against other agents like alpha-cyclodextrin (alpha-CD), beta-cyclodextrin (beta-CD), potassium iodide (KI), and polyvinylpyrrolidone (PVP).
Main Methods:
- Solubility method to determine stability constants of iodine inclusion complexes.
- Measurement of volatile depression effects.
- Minimum inhibitory concentration (MIC) assays using Escherichia coli and Staphylococcus aureus.
Main Results:
- Apparent stability constants followed the order: KI < beta-CD < alpha-CD < 2-HP-alpha-CD.
- 2-HP-alpha-CD demonstrated the most significant volatile depression effect.
- The bactericidal activity of the iodine/2-HP-alpha-CD system was comparable to iodine/alpha-CD, iodine/beta-CD, and iodine/PVP systems.
Conclusions:
- 2-HP-alpha-CD is a highly effective solubilizer for iodine.
- The 2-HP-alpha-CD/iodine combination offers a stable and potent iodine solution.
- This system holds promise for antiseptic and disinfectant applications.