How mouth bacteria resist saliva's natural oxidants and affect tooth decay
The impact of bacterial oxidative stress responses on the ecology and pathogenicity of oral streptococci
['FUNDING_R01'] · UNIVERSITY OF ALABAMA AT BIRMINGHAM · NIH-11300219
This work looks at how some common mouth bacteria protect themselves from a natural saliva chemical and how that may change the mix of bacteria linked to cavities.
Quick facts
| Phase | ['FUNDING_R01'] |
|---|---|
| Study type | Nih_funding |
| Sex | All |
| Sponsor | UNIVERSITY OF ALABAMA AT BIRMINGHAM (nih funded) |
| Locations | 1 site (BIRMINGHAM, UNITED STATES) |
| Trial ID | NIH-11300219 on ClinicalTrials.gov |
What this research studies
From a patient perspective, researchers will compare health-associated and cavity-associated Streptococcus bacteria to see why some survive better in human saliva. They will study a bacterial enzyme called RclA that can break down a saliva-made oxidant (HOSCN) and test how that enzyme changes bacterial survival in lab models. The team will run experiments that mix different bacterial species and expose them to saliva-like conditions to see which bacteria dominate. Results will be used to explain how bacterial defenses shape oral communities linked to tooth decay.
Who could benefit from this research
Good fit: Ideal participants would include people with active dental cavities and people with healthy mouths who can provide saliva samples for comparing bacterial communities.
Not a fit: People seeking immediate dental treatment or expecting direct personal health improvement are unlikely to receive clinical benefit from participating in this laboratory-focused research.
Why it matters
Potential benefit: If successful, this could point to new ways to prevent or reduce cavities by blocking bacterial defenses or promoting beneficial mouth bacteria.
How similar studies have performed: Previous research shows saliva produces the antimicrobial HOSCN and some bacteria resist it, but using the newly identified RclA enzyme to explain shifts in cavity-associated versus health-associated bacteria is a newer, less-tested idea.
Where this research is happening
BIRMINGHAM, UNITED STATES
- UNIVERSITY OF ALABAMA AT BIRMINGHAM — BIRMINGHAM, UNITED STATES (ACTIVE)
Researchers
- Principal investigator: GRAY, MICHAEL JEFFREY — UNIVERSITY OF ALABAMA AT BIRMINGHAM
- Study coordinator: GRAY, MICHAEL JEFFREY
About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page below.
Conditions: Bacterial Infections