Helicobacter pylori Eradication Using Laser Endoscope and Methylene Blue

Area of Science:

• Microbiology
• Photodynamic Therapy
• Gastroenterology

Background:

• Antibiotic resistance in Helicobacter pylori (H. pylori) significantly hinders eradication success.
• There is a critical need for novel, non-antibiotic strategies to combat H. pylori infections.
• Photodynamic antimicrobial chemotherapy (PACT) presents a promising alternative approach.

Purpose of the Study:

• To investigate the efficacy of methylene blue (MB) combined with sodium bicarbonate (NaHCO3) for H. pylori eradication.
• To evaluate the use of a laser endoscope in conjunction with MB and NaHCO3 for PACT.
• To determine the optimal conditions for MB-based PACT against H. pylori.

Main Methods:

• Methylene blue was alkalized using sodium bicarbonate.
• The efficacy of alkalized MB was tested on H. pylori cultures using a laser endoscope.
• Bacterial growth was assessed after light illumination of cultures treated with alkalized MB.

Main Results:

• Effective alkalization of MB was achieved at pH 8.6-9.0 with 2%-6.5% NaHCO3.
• MB concentrations exceeding 0.05% demonstrated significant antimicrobial effects.
• Irradiation duration did not notably influence the eradication outcomes.

Conclusions:

• The combination of a laser endoscope and alkalized methylene blue shows effectiveness in eradicating H. pylori.
• This non-antibiotic approach holds potential for overcoming treatment resistance.
• Further research into PACT for H. pylori is warranted.