Antimicrobial actions of benzimidazoles against the oral anaerobes Fusobacterium nucleatum and Prevotella intermedia
| Autor: | J. Olsson, Jiangyun Sheng, Jeremiah D. BaldeckJ.D. Baldeck, Robert E. Marquis, Phuong T. M. Nguyen |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Glutamic Acid
Fructose Aminopeptidases Prevotella intermedia 2-Pyridinylmethylsulfinylbenzimidazoles Microbiology chemistry.chemical_compound Anti-Infective Agents Serine Humans Lansoprazole Anaerobiosis Amino Acids Enzyme Inhibitors General Dentistry chemistry.chemical_classification Mouth biology Fusobacterium nucleatum Catabolism Lysine Cell Biology General Medicine Hydrogen-Ion Concentration biology.organism_classification Antimicrobial Amino acid Oxygen stomatognathic diseases Glucose Otorhinolaryngology chemistry Biochemistry Fermentation Bacteria |
| Zdroj: | Archives of oral biology. 51(11) |
| ISSN: | 0003-9969 |
| Popis: | Summary Background/objective Benzimidazoles are widely used as proton-pump inhibitors to control stomach hyperacidity and have been found also to have antimicrobial actions against Helicobacter pylori and oral streptococci. Our primary aim was to determine if they are active also against oral anaerobes associated with gingivitis. Our major focus was on catabolism because it leads to production of inflammatory metabolites such as butyrate and ammonia. The benzimidazoles are effective in the protonated form at acid pH values and cause irreversible inhibition of enzymes associated with formation of drug-target disulfide bonds. Methods Fusobacterium nucleatum ATCC 25586 and Prevotella intermedia ATCC 25611 were grown anaerobically in suspension cultures, harvested, washed and exposed to the benzimidazole lansoprazole at pH values of 4 or 5 before being washed and used for standard assays to detect inhibition of catabolic functions, uptake of the agent and lethality. Results Lansoprazole was found to be a bacteriostatic, multi-target antimicrobial against F. nucleatum under anaerobic conditions inhibitory for amino acid fermentation and also for glycolysis of glucose or fructose. ID 50 values for fermentation of amino acids and dipeptides by F. nucleatum ranged from 0.05 mM for lysine to 0.25 mM for serine. Fructose catabolism was highly sensitive with an ID 50 value of 0.03 mM apparently related to high sensitivity of the phosphoenolpyruvate:fructose phosphotransferase system, while the ID 50 for glucose catabolism by intact cells was some 0.07 mM. Fermentation of aspartate or aspartylaspartate by P. intermedia was found to be lansoprazole-sensitive with ID 50 values of about 0.18 and 0.20 mM, respectively. Conclusion Catabolism of amino acids, dipeptides and sugars by oral anaerobes associated with gingivitis are sensitive to the inhibitory actions of lansoprazole. Thus, catabolic pathways are potential targets for use of benzimidazoles against bacteria involved in gingivitis. |
| Databáze: | OpenAIRE |
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