Increased urinary excretion of free N-acetylneuraminic acid in thirteen patients with Salla disease

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Thirteen severely retarded patients with Salla disease, a new type of lysosomal storage disorder, have been studied biochemically. All patients excreted approximately ten times more free sialic acid than normal individuals. The isolated sialic acid was characterized by paper chromatography, thin-layer chromatography, optical rotation, 13C and 1H nuclear magnetic resonance spectroscopy, and mass spectrometry of its permethylated derivative. The results clearly indicated that the excreted sialic acid was identical to N-acetylneuraminic acid. The main sialylated trisaccharide present in the urine of the patients was identified as 3'-sialyllactose by sugar and methylation analysis. The excreted amounts were found to be within normal range.


  • Martin Renlund
  • Alan Chester
  • Arne Lundblad
  • Pertti Aula
  • Kari O Raivio
  • Seppo Autio
  • Sirkka-Liisa Koskela
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Hematology
Original languageEnglish
Pages (from-to)245-250
JournalEuropean Journal of Biochemistry
Issue number1
Publication statusPublished - 1979
Publication categoryResearch