Deacylated lipopolysaccharides inhibit biofilm formation by Gram-negative bacteria.
The extracellular polysaccharides of Vibrio vulnificus play different roles during biofilm development. Among them, the effect of lipopolysaccharide (LPS), which is crucial for bacterial adherence to surfaces during the initial stage of biofilm formation, on the formation process was examined using various types of LPS extracts. Exogenously added LPS strongly inhibited biofilm formation in a dose-dependent manner. In addition, the exogenous addition of a deacylated form of LPS (dLPS) also inhibited biofilm formation. However, an LPS fraction extracted from a mutant not able to produce O-antigen polysaccharides (O-Ag) did not have an inhibitory effect. Furthermore, biofilm formation by several Gram-negative bacteria was inhibited by dLPS addition. In contrast, biofilm formation by Gram-positive bacteria was not influenced by dLPS but was affected by lipoteichoic acid. Therefore, this study demonstrates that O-Ag in LPS is important for inhibiting biofilm formation and may serve an efficient anti-biofilm agent specific for Gram-negative bacteria.
a Department of Life Science , Sogang University , Seoul , Republic of Korea.
Kyung-Jo
KJ
Lee
a Department of Life Science , Sogang University , Seoul , Republic of Korea.
Mi-Ae
MA
Lee
a Department of Life Science , Sogang University , Seoul , Republic of Korea.
Won
W
Hwang
a Department of Life Science , Sogang University , Seoul , Republic of Korea.
Hana
H
Park
a Department of Life Science , Sogang University , Seoul , Republic of Korea.
Kyu-Ho
KH
Lee
D001422:Bacterial Adhesion / Q000187:drug effects; D018441:Biofilms / Q000187:drug effects* / Q000254:growth & development; D006090:Gram-Negative Bacteria / Q000187:drug effects* / Q000235:genetics / Q000502:physiology; D006094:Gram-Positive Bacteria / Q000187:drug effects / Q000235:genetics / Q000502:physiology; D008070:Lipopolysaccharides / Q000494:pharmacology*; D013682:Teichoic Acids / Q000494:pharmacology*
D008070:Lipopolysaccharides; D013682:Teichoic Acids; C052253:deacylated lipopolysaccharides; C009900:lipoteichoic acid
Biofilm; LPS; LTA; anti-biofilm agents