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Requirements for branched chain amino acids and their interactions in the nematode Caenorhabditis elegans

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For more content, see Nematologica.

Branched chain amino acid (BCAA) requirements and their interactions were studied in the nematode Caenorhabditis elegans. Optimal, deficiency and toxic levels affecting nematode population growth were determined for each of the three BCAAs. The optimal range for leucine was 0.72-2.8; for isoleucine, 0.86-1.7; and for valine, 0.51-4.1 mg ml-1. Leucine at high concentrations was toxic. When isoleucine and valine were both added at high concentrations, they also exerted a marked toxic effect. The interactions of the branched chain amino acids found among vertebrate animals were not observed in C. elegans.

Les besoins relatifs aux amino-acides en chaîne ramifiée et leurs interactions chez le nématode Caenorhabditis elegans - Les besoins relatifs aux amino-acides en chaîne ramifiée (BCAA) et leurs interactions ont été étudiés chez le nématode Caenorhabditis elegans. Les niveaux optimal, de déficience et toxique affectant la croissance de la population du nématode ont été déterminés pour chacune des BCAA. L'optimum est, pour la leucine de 0,72 à 2,8, pour l'isoleucine de 0,86 à 1,7 et pour la valine de 0,51 à 4,1 mg ml-1. A forte concentration la leucine est toxique. Si l'isoleucine et la valine sont ajoutées à forte concentration elles exercent également une action toxique prononcée. Les interactions entre BCAA observées chez les vertébrés ne l'ont pas été chez les C. elegans.

Affiliations: 1: San Jose State University, Department of Nutrition and Food Science, One Washington Square, San Jose, CA 95192-0058,USA


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