Sugars and their substitutes increase pathogenicity of Pseudomonas aeruginosa
Document Type:
Conference object (Published version)
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© 2023 by the Institute of Molecular Genetics and Genetic Engineering, University of Belgrade
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Introduction: Different sugars are commonly used in the diet, but little is understood about the various effects of human health that they can affect. Hence, the impact of sugars and their substitutes used in diet on the development of virulence in Pseudomonas aeruginosa PAO1 was investigated. Sugars (fructose, demerara, coconut sugar, and cane sugar) and sugar substitutes (erythritol and stevia) were selected. The genes from three P. aeruginosa QS networks (las - lasI, lasR; rhl - rhlI, rhlR; PQS - pqsA, mvfR) were used for RT-qPCR analysis in order to investigate whether the expression of these genes changes. In this work, the focus is on the expression of genes involved in QS and the ability to form biofilms (a type of structured community of microorganisms that is attached to the surface and connected by an exopolysaccharide matrix), as well as determining minimal inhibitory concentration of antibiotics in presence of tested compounds.
Methods: Microdiltuion assay, Antibiofilm assay, RT- qPCR
Results: In the presence of tested sugars and their substitutes, the minimum inhibitory concentration of commercial antibiotics increased, as well as the percentages of biofilm formation (for instance, the percentage of biofilm formation is 171% in the presence of coconut sugar). Furthermore, exposure of P. aeruginosa to tested compounds caused the greatest increase in expression of virulence associated with the lasI and pvdF genes.
Conclusion: More awareness and research is needed to highlight the effects sugars can have on P. aeruginosa and to propose new strategies to reduce this negative aspect.
Keywords:
sugars; sugar substitutes; virulence factors; Pseudomonas aeruginosa; gene expressionFunding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200007 (University of Belgrade, Institute for Biological Research 'Siniša Stanković') (RS-MESTD-inst-2020-200007)
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200042 (University of Belgrade, Institute of Molecular Genetics and Genetic Engineering) (RS-MESTD-inst-2020-200042)
In:
- Dobrijević Z, editor. Abstract Book: CoMBoS2 - the Second Congress of Molecular Biologists of Serbia; 2023 Oct 6-8; Belgrade, Serbia. Belgrade: Institute of Molecular Genetics and Genetic Engineering, University of Belgrade ; 2023. p. 48. (Trends in Molecular Biology; Special Issue).