A mouse model for fucosidosis recapitulates storage pathology and neurological features of the milder form of the human disease
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A mouse model for fucosidosis recapitulates storage pathology and neurological features of the milder form of the human disease. / Wolf, Heike; Damme, Markus; Stroobants, Stijn; D'Hooge, Rudi; Beck, Hans Christian; Hermans-Borgmeyer, Irm; Lüllmann-Rauch, Renate; Dierks, Thomas; Lübke, Torben.
in: DIS MODEL MECH, Jahrgang 9, Nr. 9, 01.09.2016, S. 1015-1028.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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T1 - A mouse model for fucosidosis recapitulates storage pathology and neurological features of the milder form of the human disease
AU - Wolf, Heike
AU - Damme, Markus
AU - Stroobants, Stijn
AU - D'Hooge, Rudi
AU - Beck, Hans Christian
AU - Hermans-Borgmeyer, Irm
AU - Lüllmann-Rauch, Renate
AU - Dierks, Thomas
AU - Lübke, Torben
N1 - © 2016. Published by The Company of Biologists Ltd.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - Fucosidosis is a rare lysosomal storage disorder caused by the inherited deficiency of the lysosomal hydrolase α-L-fucosidase, which leads to an impaired degradation of fucosylated glycoconjugates. Here, we report the generation of a fucosidosis mouse model, in which the gene for lysosomal α-L-fucosidase (Fuca1) was disrupted by gene targeting. Homozygous knockout mice completely lack α-L-fucosidase activity in all tested organs leading to highly elevated amounts of the core-fucosylated glycoasparagine Fuc(α1,6)-GlcNAc(β1-N)-Asn and, to a lesser extent, other fucosylated glycoasparagines, which all were also partially excreted in urine. Lysosomal storage pathology was observed in many visceral organs, such as in the liver, kidney, spleen and bladder, as well as in the central nervous system (CNS). On the cellular level, storage was characterized by membrane-limited cytoplasmic vacuoles primarily containing water-soluble storage material. In the CNS, cellular alterations included enlargement of the lysosomal compartment in various cell types, accumulation of secondary storage material and neuroinflammation, as well as a progressive loss of Purkinje cells combined with astrogliosis leading to psychomotor and memory deficits. Our results demonstrate that this new fucosidosis mouse model resembles the human disease and thus will help to unravel underlying pathological processes. Moreover, this model could be utilized to establish diagnostic and therapeutic strategies for fucosidosis.
AB - Fucosidosis is a rare lysosomal storage disorder caused by the inherited deficiency of the lysosomal hydrolase α-L-fucosidase, which leads to an impaired degradation of fucosylated glycoconjugates. Here, we report the generation of a fucosidosis mouse model, in which the gene for lysosomal α-L-fucosidase (Fuca1) was disrupted by gene targeting. Homozygous knockout mice completely lack α-L-fucosidase activity in all tested organs leading to highly elevated amounts of the core-fucosylated glycoasparagine Fuc(α1,6)-GlcNAc(β1-N)-Asn and, to a lesser extent, other fucosylated glycoasparagines, which all were also partially excreted in urine. Lysosomal storage pathology was observed in many visceral organs, such as in the liver, kidney, spleen and bladder, as well as in the central nervous system (CNS). On the cellular level, storage was characterized by membrane-limited cytoplasmic vacuoles primarily containing water-soluble storage material. In the CNS, cellular alterations included enlargement of the lysosomal compartment in various cell types, accumulation of secondary storage material and neuroinflammation, as well as a progressive loss of Purkinje cells combined with astrogliosis leading to psychomotor and memory deficits. Our results demonstrate that this new fucosidosis mouse model resembles the human disease and thus will help to unravel underlying pathological processes. Moreover, this model could be utilized to establish diagnostic and therapeutic strategies for fucosidosis.
KW - Journal Article
U2 - 10.1242/dmm.025122
DO - 10.1242/dmm.025122
M3 - SCORING: Journal article
C2 - 27491075
VL - 9
SP - 1015
EP - 1028
JO - DIS MODEL MECH
JF - DIS MODEL MECH
SN - 1754-8403
IS - 9
ER -