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Generation and Initial Characterization of FDD Knock in Mice

Overview
Journal PLoS One
Date 2009 Nov 20
PMID 19924302
Citations 26
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Abstract

Background: Mutations in the integral membrane protein 2B, also known as BRI(2), a type II trans-membrane domain protein cause two autosomal dominant neurodegenerative diseases, Familial British and Danish Dementia. In these conditions, accumulation of a C-terminal peptide (ABri and ADan) cleaved off from the mutated precursor protein by the pro-protein convertase furin, leads to amyloid deposition in the walls of blood vessels and parenchyma of the brain. Recent advances in the understanding of the generation of amyloid in Alzheimer's disease has lead to the finding that BRI(2) interacts with the Amyloid Precursor Protein (APP), decreasing the efficiency of APP processing to generate Abeta. The interaction between the two precursors, APP and BRI(2), and possibly between Abeta and ABri or ADan, could be important in influencing the rate of amyloid production or the tendency of these peptides to aggregate.

Methodology/principal Findings: We have generated the first BRI(2) Danish Knock-In (FDD(KI)) murine model of FDD, expressing the pathogenic decamer duplication in exon 6 of the BRI(2) gene. FDD(KI) mice do not show any evident abnormal phenotype, with normal brain histology and no detectable amyloid deposition in blood vessel walls or parenchyma.

Conclusions/significance: This new murine mouse model will be important to further understand the interaction between APP and BRI(2), and to provide insights into the molecular basis of FDD.

Citing Articles

Initial assessment of the spatial learning, reversal, and sequencing task capabilities of knock-in rats with humanizing mutations in the Aβ-coding region of App.

Pham H, Yin T, DAdamio L PLoS One. 2022; 17(5):e0263546.

PMID: 35507596 PMC: 9067689. DOI: 10.1371/journal.pone.0263546.


Danish and British dementia ITM2b/BRI2 mutations reduce BRI2 protein stability and impair glutamatergic synaptic transmission.

Yin T, Yao W, Lemenze A, DAdamio L J Biol Chem. 2020; 296:100054.

PMID: 33172889 PMC: 7948410. DOI: 10.1074/jbc.RA120.015679.


Facilitation of glutamate, but not GABA, release in Familial Alzheimer's APP mutant Knock-in rats with increased β-cleavage of APP.

Tambini M, Yao W, DAdamio L Aging Cell. 2019; 18(6):e13033.

PMID: 31496118 PMC: 6826143. DOI: 10.1111/acel.13033.


Tuning of Glutamate, But Not GABA, Release by an Intrasynaptic Vesicle APP Domain Whose Function Can Be Modulated by β- or α-Secretase Cleavage.

Yao W, Tambini M, Liu X, DAdamio L J Neurosci. 2019; 39(35):6992-7005.

PMID: 31235642 PMC: 6733572. DOI: 10.1523/JNEUROSCI.0207-19.2019.


BRI2 as an anti-Alzheimer gene.

Matsuda S, Senda T Med Mol Morphol. 2018; 52(1):1-7.

PMID: 29687167 DOI: 10.1007/s00795-018-0191-1.


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