Dataset Information

A new UHPLC-MS/MS method for the screening of urinary oligosaccharides expands the detection of storage disorders.

ABSTRACT:

Background

Oligosaccharidoses are storage disorders due to enzymatic defects involved in the breakdown of the oligosaccharidic component of glycosylated proteins. The defect cause the accumulation of oligosaccharides (OS) and, depending on the lacking enzyme, results in characteristic profiles which are helpful for the diagnosis. We developed a new tandem mass spectrometry method for the screening of urinary OS which was applied to identify a large panel of storage disorders.

Methods

The method was set-up in urine and dried urine spots (DUS). Samples were analysed, without derivatization and using maltoheptaose as internal standard, by UHPLC-MS/MS with MRM acquisition of target OS transitions, including Glc4, the biomarker of Pompe disease. The chromatographic run was?ResultsThe method allowed to confirm the diagnosis of oligosaccharidoses (sialidosis, ?-/?-mannosidosis, fucosidosis, aspartylglucosaminuria) and of GM1 and GM2 (Sandhoff type) gangliosidosis, by detecting specific OS profiles. In other storage disorders (mucolipidosis II and III, mucopolysaccharidosis type IVB) the analyisis revealed abnormal OS excretion with non-specific profiles. Besides Pompe disease, the tetrasaccharide Glc4 was increased also in disorders of autophagy (Vici syndrome, Yunis-Varon syndrome, and Danon disease) presenting cardiomuscular involvement with glycogen storage. Overall, results showed a clear separation between patients and controls, both in urine and in DUS.

Conclusion

This new UHPLC/MS-MS method, which is suitable for rapid and easy screening of OS in urine and DUS, expands the detection of storage disorders from oligosaccharidoses to other diseases, including the novel category of inherited disorders of autophagy.

SUBMITTER: Semeraro M

PROVIDER: S-EPMC7796585 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Publications

A new UHPLC-MS/MS method for the screening of urinary oligosaccharides expands the detection of storage disorders.

Semeraro Michela M Sacchetti Elisa E Deodato Federica F Coşkun Turgay T Lay Incilay I Catesini Giulio G Olivieri Giorgia G Rizzo Cristiano C Boenzi Sara S Dionisi-Vici Carlo C

Orphanet journal of rare diseases 20210109 1

<h4>Background</h4>Oligosaccharidoses are storage disorders due to enzymatic defects involved in the breakdown of the oligosaccharidic component of glycosylated proteins. The defect cause the accumulation of oligosaccharides (OS) and, depending on the lacking enzyme, results in characteristic profiles which are helpful for the diagnosis. We developed a new tandem mass spectrometry method for the screening of urinary OS which was applied to identify a large panel of storage disorders.<h4>Methods< ...[more]

PMID: 33422100

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Dataset Information

A new UHPLC-MS/MS method for the screening of urinary oligosaccharides expands the detection of storage disorders.

Background

Methods

Conclusion

Publications

A new UHPLC-MS/MS method for the screening of urinary oligosaccharides expands the detection of storage disorders.

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