Comprehensive evaluation of pathogenic protein accumulation in fibroblasts from all subtypes of Sanfilippo disease patients.

Autor: Wiśniewska K; Department of Molecular Biology, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland., Rintz E; Department of Molecular Biology, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland., Żabińska M; Department of Molecular Biology, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland., Gaffke L; Department of Molecular Biology, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland., Podlacha M; Department of Molecular Biology, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland., Cyske Z; Department of Molecular Biology, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland., Węgrzyn G; Department of Molecular Biology, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland., Pierzynowska K; Department of Molecular Biology, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland. Electronic address: karolina.pierzynowska@ug.edu.pl.
Jazyk: angličtina
Zdroj: Biochemical and biophysical research communications [Biochem Biophys Res Commun] 2024 Nov 12; Vol. 733, pp. 150718. Date of Electronic Publication: 2024 Sep 19.
DOI: 10.1016/j.bbrc.2024.150718
Abstrakt: Sanfilippo disease is a lysosomal storage disorder from the group of mucopolysaccharidoses (MPS), characterized by storage of glycosaminoglycans (GAGs); thus, it is also called MPS type III. The syndrome is divided into 4 subtypes (MPS III A, B, C and D). Despite the storage of the same GAG, heparan sulfate (HS), the course of these subtypes can vary considerably. Here, we comprehensively evaluated the levels of protein aggregates (APP, β-amyloid, p-tau, α-synuclein, TDP43) in fibroblasts derived from patients with all MPS III subtypes, and tested whether lowering GAG levels results in a decrease in the levels of the investigated proteins and the number of aggregates they form. Elevated levels of APP, β-amyloid, tau, and TDP43 proteins were evident in all MPS III subtypes, and elevated levels of p-tau and α-synuclein were demonstrated in all subtypes except MPS IIIC. These findings were confirmed in the neural tissue of MPS IIIB mice. Fluorescence microscopy studies also indicated a high number of protein aggregates formed by β-amyloid and tau in all cell lines tested, and a high number of aggregates of p-tau, TDP43, and α-synuclein in all lines except MPS IIIC. Reduction of GAG levels by genistein led to the decrease of levels of all tested proteins and their aggregates except α-synuclein, indicating a relationship between GAG levels and those of some protein aggregates. This work describes for the first time the problem of deposited protein aggregates in all subtypes of Sanfilippo disease and suggests that GAGs are partly responsible for the formation of protein aggregates.
Competing Interests: Declaration of competing interest The authors declare no conflict of interest.
(Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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