Abstract
Objective
To advance studies on the effect of a new pharmaceutical formulation for the treatment of oral fungal infections, we evaluated the safety and tolerability of orabase ointment containing cinnamaldehyde for use on the oral mucosa.
Material and methods
A clinical trial (phase I) was carried out on 35 individuals with healthy oral mucosa divided into three groups: ointments at 200 µg/mL, n = 12; 300 µg/mL, n = 11; and 400 µg/mL, n = 12. Product safety was assessed using three parameters: (a) clinical evolution as recorded by trained examiners; (b) evolution of the inflammatory process as registered by an exfoliative cytology exam and analyzed by trained pathologists; (c) mucosal swab to count Candida spp. colony-forming units (CFU). These parameters were analyzed both beforehand and at 15 days of treatment.
Results
The three ointment concentrations evaluated did not trigger inflammatory processes. The mycological analyses revealed a reduction of at least 99% in the number of Candida spp. CFU. In the exfoliative cytology analyses, the cells were found to be healthy. Participants reported a pleasant taste, yet 17% reported a slight burning sensation when applying the product.
Conclusions
The ointment is safe and tolerable for use on healthy oral mucosa.
Trial registration
Registration number: RBR-7zwzs3.
Clinical relevance
The ointment proved to be safe and tolerable for use on oral mucosa, encouraging studies to evaluate its clinical efficacy in patients with oral candidiasis, and contributing to a new therapeutic proposal for the treatment of fungal infections caused by Candida spp.
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Data availability
The datasets used and/or analyzed during the current study are available from the corresponding author on request.
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Funding
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoa de Nível Superior – Brasil (CAPES) – Finance Code: PROEX AUXPE—0521/2020.
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All authors contributed to the study conception and design. Material preparation and data collection and analysis were performed by Danielle da Nóbrega Alves, Ana Karoline Vieira Melo, Adriano Francisco Alves, Maria Rejane Cruz de Araújo, Rubens da Silva Araújo, and Ricardo Dias de Castro. The first draft of the manuscript was written by Danielle da Nóbrega Alves and all authors commented on previous versions of the manuscript. All authors have read and approved the final manuscript.
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All procedures followed the ethical standards of the Declaration of Helsinki, 1964. The study was submitted to the Research Ethics Committee (CEP) of the Health Sciences Center of the Federal University of Paraiba, being approved under opinion no. 3,892.294.
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Informed consent was obtained from all individual participants included in this study.
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The authors declare no competing interests.
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da Nóbrega Alves, D., Melo, A.K.V., Alves, A.F. et al. Safety and tolerability of cinnamaldehyde in orabase for oral candidiasis treatment: phase I clinical trial. Clin Oral Invest 26, 4825–4833 (2022). https://doi.org/10.1007/s00784-022-04450-9
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DOI: https://doi.org/10.1007/s00784-022-04450-9