Influence of glucose supplementation on biofilm formation of Candida albicans and Candida glabrata isolated from diabetic and non-diabetic individuals

• Published in: Archives of oral biology Vol. 134; p. 105339
• Main Authors: Domingues, Pedro Castania Amadio, Oliveira, Viviane de Cássia, Bim, Felipe Lazarini, Aires, Carolina Patrícia, Santos, André Pereira dos, Castro, Denise Tornavoi de, Silva-Lovato, Cláudia Helena, Andrade, Denise de, Watanabe, Evandro
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01-02-2022
• Subjects: Antifungal Agents; Biofilm; Biofilms; Candida albicans; Candida glabrata; Candidiasis; Diabetes Mellitus; Dietary Supplements; Glucose; Humans; Saliva; SDB; SDA; Candidiasis; Diabetes mellitus; Biofilm; DM; CFU/mL; Glucose; ATCC; Saliva; PCR; RFLP
• ISSN: 0003-9969; 1879-1506
• DOI: 10.1016/j.archoralbio.2021.105339

This study evaluated the effect of different glucose concentration on biofilm formation of Candida albicans and Candida glabrata strains isolated from diabetic and non-diabetic individuals.
The study was divided into two stages: (I) selection and identification of 48 C. albicans and C. glabrata strains by polymerase chain reaction followed by restriction fragment length polymorphism analysis (PCR/RFLP); (II) evaluation of biofilm formation by means of viability rates (colony-forming units), biofilm dry matter (mg) and biofilm-covered areas (μm2). Statistical comparisons were performed through nonparametric analysis of longitudinal data in factorial experiments with pairwise comparisons using Friedman Conover’s test (α = 0.05).
All the Candida spp. had their identifications confirmed by PCR/RFLP. C. albicans biofilm of strains from diabetic individuals cultivated in different glucose concentration showed higher viability rates than strains from non-diabetic individuals. No difference was observed on viability of C. glabrata biofilm. Regarding biofilm dry matter, C. albicans biofilm of strains from diabetic individuals cultivated in different glucose concentration showed lower amount in weight than strains from non-diabetic individuals. In C. glabrata strains, this result was only observed in biofilms cultivated with no glucose supplementation. With regard to biofilm-covered areas, only glucose supplementation and non-diabetic condition showed a positive effect on C. albicans biofilm development, and no condition affected C. glabrata biofilm formation.
The strain type (C. albicans and C. glabrata) isolated from diabetic and non-diabetic individuals influenced on biofilm formation, but glucose supplementation did not.
•Strains from diabetic and non-diabetic individuals showed excessive biofilm growth.•Glucose presented a positive effect on biofilm formation of C. albicans from non-diabetic individuals.•Glucose supplementation has no effect on biofilm formation of C. glabrata strains.