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Differentiating between disorders of peroxisomal biogenesis (eg, Zellweger syndrome) and disorders with loss of a single peroxisomal function
Detecting abnormal elevations of pipecolic acid in urine
Pipecolic acid is not detected by conventional organic acid analysis of urine.
Measurement of pipecolic acid is a useful diagnostic tool for differentiating between peroxisomal biogenesis disorders (Zellweger spectrum disorders) and peroxisomal disorders caused by single enzyme deficiencies such as X-linked adrenoleukodystrophy (X-ALD).
Results must be interpreted together with the results of other biochemical markers for peroxisomal disorders.
Both urine and plasma are suitable specimens for the detection of pipecolic acid.
Gas Chromatography-Mass Spectrometry (GC-MS)