Previous studies underestimate BMAA concentrations in cycad flour

Area of Science:

• Neuroscience
• Environmental Toxicology
• Biochemistry

Background:

• The traditional Chamorro diet in Guam is high in the neurotoxin beta-methyl-amino-L-alanine (BMAA).
• BMAA is found in cycad tortillas and animals consuming cycad seeds, raising concerns about potential health impacts.
• Previous research primarily focused on free BMAA, potentially underestimating total exposure.

Purpose of the Study:

• To quantify BMAA concentrations in washed cycad flour.
• To compare different BMAA extraction methods used in prior studies.
• To investigate the presence of protein-associated BMAA, which may have been overlooked.

Main Methods:

• Washed cycad flour samples were analyzed for BMAA.
• Analytical methods included AQC precolumn derivatization with HPLC-FD detection.
• Verification was performed using UPLC-UV, UPLC-MS, and triple quadrupole LC/MS/MS.

Main Results:

• Significant levels of protein-associated BMAA were detected in washed cycad flour.
• This finding contrasts with previous studies that only measured free BMAA.
• The study highlights potential underestimation of BMAA in earlier research.

Conclusions:

• The presence of protein-associated BMAA in cycad flour provides further evidence for dietary exposure.
• These findings strengthen the proposed link between BMAA exposure and neurodegenerative diseases, including Amyotrophic Lateral Sclerosis/Parkinsonism-Dementia complex (ALS/PDC).
• Further research into BMAA's role in neurodegeneration is warranted.