In Vivo and In Vitro Studies Assessing the Safety of Monosodium Glutamate

Area of Science:

• Toxicology
• Nutraceuticals
• Cancer Research

Background:

• Controversial research on monosodium glutamate (MSG) necessitates further safety evaluations.
• Animal and cellular models are crucial for understanding MSG's biological effects.

Purpose of the Study:

• To evaluate the safety of MSG using the Drosophila melanogaster model.
• To investigate potential nutraceutical and chemopreventive effects of MSG.

Main Methods:

• Assessed MSG toxicity, genotoxicity, longevity, and health span in Drosophila at various concentrations.
• Evaluated MSG's protective effects against hydrogen peroxide-induced damage.
• Investigated MSG's cytotoxic and antitumour activity against the HL-60 cell line.
• Analyzed LINE1 DNA methylation as a marker for chemoprevention.

Main Results:

• MSG at acceptable daily intake (ADI) concentrations (0.06 mg/mL) showed no toxicity or genotoxicity in Drosophila, preserving lifespan.
• MSG exhibited protective effects against oxidative stress, inhibiting genotoxicity by 43.7% and increasing health span by 32%.
• MSG demonstrated cytotoxic and antitumour activity against HL-60 cells, inducing DNA fragmentation and significant LINE1 DNA methylation.

Conclusions:

• MSG is safe for consumption at ADI levels, with no observed toxicity or genotoxicity in Drosophila.
• MSG exhibits potential nutraceutical benefits, including antioxidant and antigenotoxic properties.
• MSG shows promise as a chemopreventive agent, indicated by its antitumour activity and induction of DNA methylation in cancer cells.