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      Cyanobacteria (Nostoc commune) used as a dietary item in the Peruvian highlands produce the neurotoxic amino acid BMAA

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          Abstract

          In the mountains of Peru, globular colonies of Nostoc commune (Nostocales) are collected in the highland lakes by the indigenous people, who call them llullucha. They are consumed locally, traded for maize, or sold, eventually entering the folk markets of Cusco and other neighboring cities. Throughout highland Peru, Nostoc commune is highly salient as a seasonal dietary item, being eaten alone, or in picante -- a local stew -- and is said to be highly nutritious. Nostoc commune has been known to produce unusual amino acids, including those of the mycosporine group, which possibly function to prevent UV damage. We analyzed 21 different Nostoc commune spherical colonies from 7 different market collections in the Cusco area for the presence of beta-N-methylamino-L-alanine (BMAA), a neurotoxic amino acid produced by diverse taxa of cyanobacteria, using four different analytical techniques (HPLC-FD, UPLC-UV, UPLC/MS, LC/MS/MS). We found using all four techniques that BMAA was present in the samples purchased in the Peruvian markets. Since BMAA has been putatively linked to neurodegenerative illness, it would be of interest to know if the occurrence of ALS, Alzheimer's, or Parkinson's Disease is greater among individuals who consume llullucha in Peru.

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          Author and article information

          Journal
          Journal of Ethnopharmacology
          Journal of Ethnopharmacology
          Elsevier BV
          03788741
          June 2008
          June 2008
          : 118
          : 1
          : 159-165
          Article
          10.1016/j.jep.2008.04.008
          18495396
          5b9d8585-0857-4a77-8046-fba657f06b9b
          © 2008

          https://www.elsevier.com/tdm/userlicense/1.0/

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