Antibodies generated against dextransucrase exhibit potential anticariostatic properties in Streptococcus mutans

Area of Science:

• Microbiology
• Immunology
• Biochemistry

Background:

• Streptococcus mutans is a primary cause of dental caries.
• Dextransucrase is a key enzyme in S. mutans virulence.
• Developing targeted therapies against S. mutans is crucial for caries prevention.

Purpose of the Study:

• To investigate the efficacy of antibodies against dextransucrase in inhibiting S. mutans growth and virulence.
• To assess the specificity of these antibodies against mammalian tissues and other bacteria.

Main Methods:

• Purification of dextransucrase enzyme.
• Generation and purification of specific IgG antibodies.
• In vitro assays measuring enzyme activity, bacterial growth, glucosyltransferase activity, and biofilm formation.
• Western blot and dot blot analyses for cross-reactivity testing.

Main Results:

• Purified dextransucrase showed high specific activity.
• Antibodies significantly inhibited S. mutans growth (85%) and biofilm formation (92.6%).
• Antibodies also impaired glucosyltransferase activity (72.8%) with no cross-reactivity with mammalian tissues.

Conclusions:

• Antibodies against dextransucrase demonstrate potent inhibitory effects on S. mutans.
• These antibodies show high specificity, indicating potential as a safe and effective anticariogenic agent.