Figure 7. Metabolomics Analysis Reveals Altered Tryptophan Metabolism in SCA7 Patients.
(A–F) We performed high-resolution mass spectrometry in combination with liquid chromatography (LC-HRMS) on plasma samples from 13 fasted SCA7 patients and 35 fasted controls. Depicted are boxplot representations for analyte signal areas in log-10, corresponding to (A) tryptophan, (B) kynurenine, (C) kynurenine/tryptophan ratio, (D) 5-hydroxytryptophan, (E) kynurenic acid, and (F) xanthurenic acid. **p < 0.01 and ***p < 0.001 (two-tailed t test). Error bars indicate SEM.