Mass Spectrometry Evaluation of Biomarkers in the Vitreous Fluid in Gaucher Disease Type 3 with Disease Progression Despite Long-Term Treatment

Autor: Jeff Barnes, Leanne Zimmer, Frank A. Stockl, Donald R. Duerksen, Cheryl Rockman-Greenberg, Christiane Auray-Blais, Aizeddin A. Mhanni, Janine L. Johnston, Michel Boutin
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Diagnostics, Vol 10, Iss 2, p 69 (2020)
Diagnostics
Volume 10
Issue 2
ISSN: 2075-4418
Popis: Intraocular lesions have been infrequently reported in patients with Gaucher disease type 3 (GD3). We previously reported siblings with GD3 who responded well to the combination of enzyme replacement therapy (ERT) and substrate reduction therapy (SRT). Here we report progressive bilateral vitreous and preretinal deposits with declining visual acuity requiring bilateral vitrectomies in one of these siblings. These ocular manifestations had progressed despite combined ERT and SRT with improvement in visual acuity after vitrectomies. Vitrectomy fluid analysis performed for the first time by ultra-performance liquid chromatography&ndash
tandem mass spectrometry (UPLC-MS/MS) identified a high concentration of glucosylceramide (GluCer) in the patient (262.842 nM) compared to a sample (0.428 nM from a patient without a lysosomal storage or known hereditary metabolic disorder). The GluCer detected in our patient was resolved into 12 different isoforms including two methylated ones. No evidence of galactosylceramide (GalCer) was detected. The development of these intraocular manifestations and their characterization by UPLC-MS/MS indicate a need for ongoing ophthalmologic evaluation of all GD patients and for new therapies that can cross the blood&ndash
retinal and blood&ndash
brain barriers for patients with GD and other neuropathic lysosomal storage disorders.
Databáze: OpenAIRE
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