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Objectives: This research work intends to clarify the role of artificial saliva, in particularly the role of mucin, a salivary protein, on the surface properties and adhesion ability of Candida spp. oral clinical isolates to abiotic surfaces. Methods: Four oral clinical isolates of Candida spp. were used: two Candida albicans strains (AC; AM) and two Candida parapsilosis strains (AD; AM2). The strains were isolated from patients using oral prosthesis. The microorganisms were cultured in the absence or presence of mucin and artificial saliva, and their adhesion to an abiotic surface (coated with mucin and artificial saliva) was evaluated. Results: The presence of mucin per se onto the abiotic surface decreased the adhesion of all strains, although the combination of mucin with artificial saliva had reduced this effect. No direct correlation between adhesion and the surface free energies of adhesion of the microorganisms was found. Significance: Candida spp. were human commensal microorganisms that became pathogenic when the host immune defenses were compromised. Medical devices were colonized by Candida spp. particularly, oral prostheses, which might lead to the degradation of the prostheses and systemic infections. The salivary secretions that constantly cover the oral cavity influenced Candida spp. adhesion process. Therefore, it was important to understand the interactions between Candida spp., salivary proteins and the characteristic of oral prosthesis when developing materials for oral prostheses.The authors thank the Project “BioHealth-Biotechnology and Bioengineering approaches to improve health quality”, Ref. NORTE-07-0124-FEDER-000027, co-funded by the Programa Operacional Regional do Norte (ON.2-O Novo Norte), QREN, FEDER. The would also like to thank the Fundação para a Ciência e Tecnologia for the Strategic Project Pest-OE/EQB/LA0023/2013 and Fundação para a Ciência e Tecnologia (FCT) for Ana Oliveira PhD Grant (SFRH/BD/68588/2010) and Catarina L. Seabra PhD Grant (SFRH/BD/89001/2012). The authors would also like to acknowledge Professora Rosário Oliveira, which is no longer with us, for her exceptional contribution and dedication to this work

Influence of Saliva and Mucin on the Adhesion of &lt;i&gt;Candida&lt;/i&gt; Oral Clinical Isolates

Influence of Saliva and Mucin on the Adhesion of <i>Candida</i> Oral Clinical Isolates