Abstract
The objective of this study was to study the effect of formulation compositions on physicochemical properties and anti-Propionibacterium acnes activity of film-forming solutions containing alpha-mangostin-rich extract (AM). Film-forming solution bases and film-forming solutions containing AM were prepared by using Eudragit RL PO or Klucel LF or combinations of them as film-forming polymers. Rheological properties, pH values of the solutions, and mechanical properties of the dry films were investigated. An optimized formulation was selected and evaluated for the film surface, in vitro AM release, an anti-P. acnes activity, and potential for being a skin irritant. It was found that mechanical properties of the dry films were affected by total polymer contents, ratios of Klucel LF/Eudragit RL PO, AM, and contents of triethyl citrate. The film-forming solutions containing AM had pH values around 7.0. Their flow curves exhibited Newtonian flow behaviors. The optimized formulation provided films possessing smooth and nonporous surfaces. These films showed greater anti-P. acnes activity than their base films without toxicity to skin fibroblasts. Furthermore, AM released from the film matrix obeyed Higuchi's equation. In conclusion, the film-forming solutions containing AM had potential for treatment of acne vulgaris caused by P. acnes. However, further in vivo study is necessary to determine their efficacy and safety for using in patients suffering from acne vulgaris.
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Abbreviations
- AM:
-
Alpha-mangostin-rich extract
- BHI:
-
Brain–heart infusion
- CFU:
-
Colony-forming unit
- CO2 :
-
Carbon dioxide
- cm:
-
Centimeter
- °C:
-
Degree Celsius
- DMEM:
-
Dulbecco's modified Eagle's medium
- DMSO:
-
Dimethylsulfoxide
- FBS:
-
Fetal bovine serum
- FT-IR:
-
Fourier transform infrared
- g:
-
Gram
- gf:
-
Gram force
- HCl:
-
Hydrochloric acid
- HPLC:
-
High-performance liquid chromatography
- i.e.:
-
id est
- kg:
-
Kilogram
- kV:
-
Kilovolt
- mM:
-
Millimolar
- MIC:
-
Minimum inhibitory concentration
- min:
-
Minutes
- mg:
-
Milligram
- ml:
-
Milliliter
- mm:
-
Millimeter
- MTT:
-
Methylthiazolydiphenyl-tetrazolium bromide
- N:
-
Newton
- N:
-
Normality
- NHFF:
-
Normal human foreskin fibroblast
- nm:
-
Nanometer
- Pa:
-
Pascal
- PBS:
-
Phosphate buffer saline
- pH:
-
Potential of hydrogen
- r 2 :
-
Coefficient of determination
- rpm:
-
Round per minute
- s:
-
Second
- SD:
-
Standard deviation
- SEM:
-
Scanning electron microscopy
- UV:
-
Ultraviolet
- v/v :
-
Volume by volume
- w/v :
-
Weight by volume
- w/w :
-
Weight by weight
- μg:
-
Microgram
- μl:
-
Microliter
- μm:
-
Micrometer
- %:
-
Percent
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ACKNOWLEDGMENTS
The authors gratefully acknowledge the National Science and Technology Development Agency (NSTDA) for financial support under the Young Scientist and Technologist Programme (YSTP) grant no. SP54-MT06 (academic year 2011) and Assistant Professor Sarin Tadtong and Associate Professor Suwanna Vorarat for their technical assistance and helpful suggestions.
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Asasutjarit, R., Larpmahawong, P., Fuongfuchat, A. et al. Physicochemical Properties and Anti-Propionibacterium acnes Activity of Film-Forming Solutions Containing Alpha-Mangostin-Rich Extract. AAPS PharmSciTech 15, 306–316 (2014). https://doi.org/10.1208/s12249-013-0057-8
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DOI: https://doi.org/10.1208/s12249-013-0057-8