Llama Palacios, María ArantxazuPotupa, OksanaSánchez Beltrán, María Del CarmenFiguero Ruiz, ElenaHerrera González, DavidSanz Alonso, Mariano2024-10-222024-10-222017Llama-Palacios A, Potupa O, Sánchez MC, Figuero E, Herrera D, Sanz M. Aggregatibacter actinomycetemcomitans Growth in Biofilm versus Planktonic State: Differential Expression of Proteins. J Proteome Res. 2017 Sep 1;16(9):3158-3167. doi: 10.1021/acs.jproteome.7b001271535-389310.1021/acs.jproteome.7b00127https://hdl.handle.net/20.500.14352/109195Aggregatibacter actinomycetemcomitans (Aa) is a pathogenic bacterium residing in the subgingival plaque biofilm strongly associated with the pathogenesis of periodontitis. The aim of this investigation was to study the protein differential expression of Aa when growing on biofilm compared with planktonic state using proteomic analysis by the 2D-DIGE system. Eighty-seven proteins were differentially expressed during biofilm growth (1.5-fold, p < 0.05), with 13 overexpressed and 37 down-expressed. Those repressed were mainly proteins involved in metabolism, biosynthesis, and transport. The overexpressed proteins were outer membrane proteins (OMPs) and highly immunogenic proteins such as YaeT (OMP), FtsZ, OMP39, OMP18/16, the chaperone GroEL, OMPA, adenylate kinase (Adk), and dihydrolipoamide acetyltransferase. The enrichment fractions of the OMPs from biofilm and planktonic states were obtained, and these proteins were analyzed by Western blotting with human serum from a periodontitis patient and one healthy control. These immunogenic proteins overexpressed in the biofilm may represent candidate virulence factorsengjournal article1535-3907https://doi.org/10.1021/acs.jproteome.7b0012728707473https://pubs.acs.org/doi/10.1021/acs.jproteome.7b00127https://pubmed.ncbi.nlm.nih.gov/28707473/open access616.314.17-008.1579.61Aggregatibacter actinomycetemcomitansBiofilmProteomic2D-DIGEOuter membrane proteinsPeriodonciaMicrobiología médica3213.13 Ortodoncia-Estomatología2414 Microbiología3201.03 Microbiología Clínica