NDLI: Inflammation in Lafora Disease: Evolution with Disease Progression in Laforin and Malin Knock-out Mouse Models

Content Provider	Springer Nature Link
Author	López González, Irene Viana, Rosa Sanz, Pascual Ferrer, Isidre
Copyright Year	2016
Abstract	Lafora progressive myoclonus epilepsy (Lafora disease, LD) is a fatal rare autosomal recessive neurodegenerative disorder characterized by the accumulation of insoluble ubiquitinated polyglucosan inclusions in the cytoplasm of neurons, which is most commonly associated with mutations in two genes: EPM2A, encoding the glucan phosphatase laforin, and EPM2B, encoding the E3-ubiquitin ligase malin. The present study analyzes possible inflammatory responses in the mouse lines Epm2a $^{−/−}$ (laforin knock-out) and Epm2b $^{−/−}$ (malin knock-out) with disease progression. Increased numbers of reactive astrocytes (expressing the GFAP marker) and microglia (expressing the Iba1 marker) together with increased expression of genes encoding cytokines and mediators of the inflammatory response occur in both mouse lines although with marked genotype differences. C3ar1 and CxCl10 messenger RNAs (mRNAs) are significantly increased in Epm2a $^{−/−}$ mice aged 12 months when compared with age-matched controls, whereas C3ar1, C4b, Ccl4, CxCl10, Il1b, Il6, Tnfα, and Il10ra mRNAs are significantly upregulated in Epm2b $^{−/−}$ at the same age. This is accompanied by increased protein levels of IL1-β, IL6, TNFα, and Cox2 particularly in Epm2b $^{−/−}$ mice. The severity of inflammatory changes correlates with more severe clinical symptoms previously described in Epm2b $^{−/−}$ mice. These findings show for the first time increased innate inflammatory responses in a neurodegenerative disease with polyglucosan intraneuronal deposits which increase with disease progression, in a way similar to what is seen in neurodegenerative diseases with abnormal protein aggregates. These findings also point to the possibility of using anti-inflammatory agents to mitigate the degenerative process in LD.
Starting Page	3119
Ending Page	3130
Page Count	12
File Format	PDF
ISSN	08937648
Journal	Molecular Neurobiology
Volume Number	54
Issue Number	5
e-ISSN	15591182
Language	English
Publisher	Springer US
Publisher Date	2016-04-04
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Lafora disease Polyglucosan Inflammation Cytokines Chemokines Microglia Neurosciences Neurobiology Cell Biology Neurology
Content Type	Text
Resource Type	Article
Subject	Neurology Cellular and Molecular Neuroscience

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