{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T03:48:47Z","timestamp":1779162527611,"version":"3.51.4"},"reference-count":28,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2019,10,1]],"date-time":"2019-10-01T00:00:00Z","timestamp":1569888000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100000272","name":"National Institute for Health Research","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000272","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100007343","name":"Shire","doi-asserted-by":"publisher","award":["IIR\u2010GBR\u2010000981"],"award-info":[{"award-number":["IIR\u2010GBR\u2010000981"]}],"id":[{"id":"10.13039\/100007343","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Inher Metab Disea"],"published-print":{"date-parts":[[2020,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Extracellular matrix (ECM) disruption is known to be an early pathological feature of the Mucopolysaccharidoses (MPS). Collagen is the main component of the ECM and its metabolism could act as a useful indicator of ECM disruption. We have measured the specific collagen breakdown products; urinary free hydroxylated (Lys\u2010OH) and glycosylated hydroxylysines (Lys\u2010O\u2010Gal and Lys\u2010O\u2010GalGlc) in MPS patients using a tandem liquid chromatography tandem mass spectrometry assay. A pilot study cohort analysis indicated that concentrations of lysine and Lys\u2010OH were raised significantly in MPS I (Hurler) disease patients. Lys\u2010O\u2010GalGlc was raised in MPS II and MPS VI patients and demonstrated a significant difference between MPS I Hurler and an MPS I Hurler\u2010Scheie group. Further analysis determined an age association for glycosylated hydroxylysine in control samples similar to that observed for the glycosaminoglycans. Using defined age ranges and treatment na\u00efve patient samples we confirmed an increase in glycosylated hydroxylysines in MPS I and in adult MPS IVA. We also looked at the ratio of Lys\u2010O\u2010Gal to Lys\u2010O\u2010GalGlc, an indicator of the source of collagen degradation, and noticed a significant change in the ratio for all pediatric MPS I, II, and IV patients, and a small significant increase in adult MPS IV. This indicated that the collagen degradation products were coming from a source other than bone such as cartilage or connective tissue. To see how specific the changes in glycosylated hydroxylysine were to MPS patients we also looked at levels in patients with other inherited metabolic disorders. MPS patients showed a trend towards increased glycosylated hydroxylysines and an elevated ratio compared to other metabolic disorders that included Battens disease, Fabry disease, Pyridoxine\u2010dependent epilepsy (due to mutations in ALDH7A1), and Niemann Pick C disease.<\/jats:p>","DOI":"10.1002\/jimd.12166","type":"journal-article","created":{"date-parts":[[2019,8,27]],"date-time":"2019-08-27T05:09:28Z","timestamp":1566882568000},"page":"309-317","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Free urinary glycosylated hydroxylysine as an indicator of altered collagen degradation in the mucopolysaccharidoses"],"prefix":"10.1002","volume":"43","author":[{"given":"Nina","family":"Patel","sequence":"first","affiliation":[{"name":"Inborn Errors of Metabolism Section, Genetics &amp; Genomic Medicine Unit, Great Ormond Street Institute of Child Health University College London  London UK"},{"name":"NIHR Great Ormond Street Biomedical Research Centre Great Ormond Street Hospital and UCL Great Ormond Street Institute of Child Health  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9704-1268","authenticated-orcid":false,"given":"Philippa","family":"Mills","sequence":"additional","affiliation":[{"name":"Inborn Errors of Metabolism Section, Genetics &amp; Genomic Medicine Unit, Great Ormond Street Institute of Child Health University College London  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9009-5538","authenticated-orcid":false,"given":"James","family":"Davison","sequence":"additional","affiliation":[{"name":"NIHR Great Ormond Street Biomedical Research Centre Great Ormond Street Hospital and UCL Great Ormond Street Institute of Child Health  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maureen","family":"Cleary","sequence":"additional","affiliation":[{"name":"NIHR Great Ormond Street Biomedical Research Centre Great Ormond Street Hospital and UCL Great Ormond Street Institute of Child Health  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9712-6122","authenticated-orcid":false,"given":"Paul","family":"Gissen","sequence":"additional","affiliation":[{"name":"Inborn Errors of Metabolism Section, Genetics &amp; Genomic Medicine Unit, Great Ormond Street Institute of Child Health University College London  London UK"},{"name":"NIHR Great Ormond Street Biomedical Research Centre Great Ormond Street Hospital and UCL Great Ormond Street Institute of Child Health  London UK"},{"name":"Metabolic Medicine Department Great Ormond Street Hospital for Children NHS Foundation Trust  London UK"},{"name":"MRC Laboratory for Molecular Cell Biology University College London  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4314-8369","authenticated-orcid":false,"given":"Blerida","family":"Banushi","sequence":"additional","affiliation":[{"name":"Metabolic Medicine Department Great Ormond Street Hospital for Children NHS Foundation Trust  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4580-6396","authenticated-orcid":false,"given":"Ivan","family":"Doykov","sequence":"additional","affiliation":[{"name":"Inborn Errors of Metabolism Section, Genetics &amp; Genomic Medicine Unit, Great Ormond Street Institute of Child Health University College London  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Megan","family":"Dorman","sequence":"additional","affiliation":[{"name":"NIHR Great Ormond Street Biomedical Research Centre Great Ormond Street Hospital and UCL Great Ormond Street Institute of Child Health  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0763-8288","authenticated-orcid":false,"given":"Kevin","family":"Mills","sequence":"additional","affiliation":[{"name":"Inborn Errors of Metabolism Section, Genetics &amp; Genomic Medicine Unit, Great Ormond Street Institute of Child Health University College London  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2106-8760","authenticated-orcid":false,"given":"Wendy E.","family":"Heywood","sequence":"additional","affiliation":[{"name":"Inborn Errors of Metabolism Section, Genetics &amp; 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