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- W2479851229 abstract "Keratan sulfate (KS) is commonly elevated in urine samples from patients with mucopolysaccharidosis type IVA (MPS IVA) and is considered pathognomonic for the condition. Recently, a new method has been described by Martell et al. to detect and measure urinary KS utilizing LC-MS/MS. As a part of the validation of this method in our laboratory, we studied the sensitivity and specificity of elevated urine KS levels using 25 samples from 15 MPS IVA patients, and 138 samples from 102 patients with other lysosomal storage disorders, including MPS I (n = 9), MPS II (n = 13), MPS III (n = 23), MPS VI (n = 7), beta-galactosidase deficiency (n = 7), mucolipidosis (ML) type II, II/III and III (n = 51), alpha-mannosidosis (n = 11), fucosidosis (n = 4), sialidosis (n = 5), Pompe disease (n = 3), aspartylglucosaminuria (n = 4), and galactosialidosis (n = 1). As expected, urine KS values were significantly higher (fivefold average increase) than age-matched controls in all MPS IVA patients. Urine KS levels were also significantly elevated (threefold to fourfold increase) in patients with GM-1 gangliosidosis, MPS IVB, ML II and ML II/III, and fucosidosis. Urine KS was also elevated to a smaller degree (1.1-fold to 1.7-fold average increase) in patients with MPS I, MPS II, and ML III. These findings suggest that while the UPLC-MS/MS urine KS method is 100% sensitive for the detection of patients with MPS IVA, elevated urine KS is not specific for this condition. Therefore, caution is advised when interpreting urinary keratan sulfate results." @default.
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- W2479851229 date "2016-01-01" @default.
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- W2479851229 title "Measurement of Elevated Concentrations of Urine Keratan Sulfate by UPLC-MSMS in Lysosomal Storage Disorders (LSDs): Comparison of Urine Keratan Sulfate Levels in MPS IVA Versus Other LSDs" @default.
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- W2479851229 doi "https://doi.org/10.1007/8904_2016_1" @default.
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