Abstract
Mentha longifolia L. is used in folk medicine and its essential oil has antimicrobial and aromatic properties. The present invention relates to the development of hydrogel formulation of Mentha longifolia essential oil (EOML) for treating oral candidiasis. Various EOML hydrogels were developed using mucoadhesive polymers viz., Carbopol 940, sodium carboxymethylcellulose and their blends. The hydrogels were characterized with respect to physical, rheological and textural attributes. Finally, all the EOML based hydrogels were evaluated for in vitro efficacy against Candida albicans employing agar well diffusion and broth dilution assay. The EOML hydrogels were semisolid, off-white color, non-gritty, most stable at 4 and 25 °C, and possessed optimum spreading and pleasing aesthetic attributes. The hydrogels showed pseudo-plastic shear-thinning behaviour and variable viscosity, dependent on the concentration and type of gelling agent. The single polymer-based formulations (F1 and F2) were able to spread better compared to blended polymer formulations (F5 and F6). In broth dilution assay, of all the prepared mucoadhesive hydrogels, F1 (containing 5% Carbopol 940) exhibited lowest MIC value against Candida albicans (ATCC90028 and MTCC277), vis-a-vis EOML and standard drugs (i.e., Amphotericin B and Fluconazole). Further, there was marked enhancement in the antifungal efficacy of F1 in comparison to EOML (20 folds), Amphotericin B (2 folds) and Fluconazole (2 folds). Thus, the hydrogel formulation ensured reduced volatility of EOML and improved its therapeutic effectiveness. Owing to the mucoadhesive components and non-toxic properties of the EOML hydrogel, the formulation can be extended for clinical evaluation for treating oral thrush.
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The authors confirm that the data supporting the findings of this study are available within the article.
Abbreviations
- EOML:
-
Essential oil of Mentha longifolia
- TEA:
-
Triethanolamine
- PEG400:
-
Polyethylene glycol 400
- DMSO:
-
Dimethyl sulfoxide
- NaCMC:
-
Sodium carboxymethylcellulose
- YPD:
-
Yeast extract peptone dextrose
- F1:
-
Formulation 1
- F2:
-
Formulation 2
- F3:
-
Formulation 3
- F4:
-
Formulation 4
- F5:
-
Formulation 5
- AMPB:
-
Amphotericin B
- SS:
-
Semisolid
- SL:
-
Slightly liquid
- OW:
-
Off-white
- CH:
-
Characteristic
- US:
-
Unpleasant smell
- NSL:
-
No separation of layer
- FLU:
-
Fluconazole
- MIC:
-
Minimum inhibitory concentration
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Acknowledgements
We acknowledge Prem Kumar Khosla, Chancellor, the members of Yeast Biology Laboratory (YBL) and School of Pharmaceutical Sciences, Shoolini University for supporting this project. The research was promoted under the Center for Omics and Biodiversity Research Center at Shoolini University. Authors also acknowledge DST-FIST for infrastructural grant provided to Shoolini University.
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All the experiments were performed by Prakriti Nidhi. Dr. Anuradha Sourirajan, Dr. Poonam Negi and Dr. Kamal Dev conceived the idea and provided guidance to execute the research project. All the authors have read the manuscript.
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Prakriti Nidhi has no conflict of interest. Kamal Dev has no conflict of interest. Poonam Negi has no conflict of interest. Anuradha Sourirajan has no conflict of interest.
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Nidhi, P., Dev, K., Negi, P. et al. Development and evaluation of hydrogel formulation comprising essential oil of Mentha longifolia L. for oral candidiasis. ADV TRADIT MED (ADTM) 23, 777–787 (2023). https://doi.org/10.1007/s13596-022-00636-4
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DOI: https://doi.org/10.1007/s13596-022-00636-4