A ConA-like lectin isolated from Canavalia maritima seeds alters the expression of genes related to virulence and biofilm formation in Streptococcus mutans
Theodora Thays Arruda Cavalcante, Victor Alves Carneiro, Cinara Carneiro Neves, Humberlânia de Sousa Duarte, Maria Gleiciane de Queiroz Martins, Francisco Vassiliepe Sousa Arruda, Mayron Alves de Vasconcelos, Hélcio Silva dos Santos, Rodrigo Maranguape da Silva Cunha, Benildo Sousa Cavada, Edson Holanda Teixeira
Biologically Active Molecules Laboratory (Biomol-Lab), Department of Biochemistry and Molecular Biology, Federal University of Ceará, Forta-leza, Brazil.
Center of Agricultural Science and Biological, Acaraú Valley State Uni-versity, Sobral, Brazil.
Center of the Exact Sciences and Technology, Acaraú Valley State Uni-versity, Sobral, Brazil.
Faculty of Dentistry, Institute of Applied Theology (INTA), Sobral, Brazil.
Integrate Biomolecules Laboratory (LIBS), Department of Pathology and Legal Medicine, Federal University of Ceará, Fortaleza, Brazil.
Integrate Biomolecules Laboratory (LIBS), Faculty of Medicine of Sobral, Federal University of Ceará, Sobral, Brazil.
DOI: 10.4236/abb.2013.412143   PDF    HTML     4,543 Downloads   6,705 Views   Citations

Abstract

Bacteria form biofilms as an adaptive mechanism in response to environmental changes. Streptococcus mutans is the biofilm-forming bacterium that is primarily associated with dental caries. The expression of important genes by bacteria in biofilms is different from that of planktonic cells. Lectins are proteins that bind specifically to carbohydrates and may have important biological activities on bacterial cells, acting as antibacterial and anti-biofilm agents. ConM (Canavalia maritima lectin) is a protein that is able to inhibit the planktonic growth and biofilm formation of S. mutans. In this context, this study aimed to evaluate the effects of ConM and concanavalin A (ConA) on the expression of genes related to virulence and biofilm formation in S. mutans. The results showed that ConM significantly reduced the expression of genes encoding enzymes related to adhesion, formation and regulation of biofilms. On the contrary, ConA did not alter the expression of the genes studied. Because the two lectins have a high degree of similarity, the differences in the actions of ConM and ConA may be explained by the small structural differences in the carbohydrate recognition domain of the lectins.

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Arruda Cavalcante, T. , Carneiro, V. , Neves, C. , Sousa Duarte, H. , Queiroz Martins, M. , Sousa Arruda, F. , Vasconcelos, M. , dos Santos, H. , Silva Cunha, R. , Cavada, B. and Teixeira, E. (2013) A ConA-like lectin isolated from Canavalia maritima seeds alters the expression of genes related to virulence and biofilm formation in Streptococcus mutans. Advances in Bioscience and Biotechnology, 4, 1073-7078. doi: 10.4236/abb.2013.412143.

Conflicts of Interest

The authors declare no conflicts of interest.

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