Mar. Drugs 2007, 5, 180-196 Marine Drugs ISSN 1660-3397 © 2007 by MDPI www.mdpi.org/marinedrugs Full Original Paper Production of the Neurotoxin BMAA by a Marine Cyanobacterium Sandra Anne Banack 1,2, Holly E. Johnson 1, Ran Cheng 1 and Paul Alan Cox 1,* 1 Institute for Ethnomedicine, Box 3464, Jackson Hole, Wyoming 83001, USA; E-mails:
[email protected] (Sandra Anne Banack);
[email protected] (Holly E. Johnson);
[email protected] (Ran Cheng) 2 Department of Biological Science, California State University, Fullerton, California 92834, USA * Author to whom correspondence should be addressed; E-mail:
[email protected] Received: November 17, 2007 / Accepted: 4 December 2007 / Published: 6 December 2007 Abstract: Diverse species of cyanobacteria have recently been discovered to produce the neurotoxic non-protein amino acid β-methylamino-L-alanine (BMAA). In Guam, BMAA has been studied as a possible environmental toxin in the diets of indigenous Chamorro people known to have high levels of Amyotrophic Lateral Sclerosis/ Parkinsonism Dementia Complex (ALS/PDC). BMAA has been found to accumulate in brain tissues of patients with progressive neurodegenerative illness in North America. In Guam, BMAA was found to be produced by endosymbiotic cyanobacteria of the genus Nostoc which live in specialized cycad roots. We here report detection of BMAA in laboratory cultures of a free-living marine species of Nostoc. We successfully detected BMAA in this marine species of Nostoc with five different methods: HPLC-FD, UPLC-UV, Amino Acid Analyzer, LC/MS, and Triple Quadrupole LC/MS/MS. This consensus of five different analytical methods unequivocally demonstrates the presence of BMAA in this marine cyanobacterium.