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ABSTRACT: Background
The Annexin A11 (ANXA11) gene has been newly identified as a causative gene of amyotrophic lateral sclerosis (ALS) with or without frontotemporal dementia (FTD). The current study aimed to investigate the ANXA11 mutations in a Chinese ALS-FTD or FTD cohort.Methods
We included ten probands/patients with suspected ALS-FTD or FTD. Mutational analysis of ANXA11 was performed through Next Generation Sequencing (NGS) and Sanger sequencing. We collected and reviewed clinical presentation, neuropsychology test results, brain-imaging findings, and electrophysiological examination findings.Results
In total, six probands presented with ALS-FTD, and four with behavior variant FTD (bv-FTD). We identified a non-synonymous heterozygous mutation (c.119A>G, p.D40G) of ANXA11 in proband 1, which is associated with ALS. However, this is the first report of the mutation causing ALS-FTD. Proband 1 started with abnormal behavior and progressed to classic upper motor nervous disease. Magnetic resonance imaging (MRI) showed significant bilateral temporal lobe atrophy and bilateral hyperintensities along the corticospinal tracts.18F-AV45-PET imaging showed negative amyloid deposits.Conclusion
ANXA11-related diseases have high clinical and genetic heterogeneity. Our study confirmed the contribution of ANXA11 mutations to ALS-FTD. The ANXA11 mutations established a complex genotype-phenotype correlation in ALS-FTD. Our research further elucidated the genetic mechanism of ALS-FTD and contributed to setting the foundation of future targeted therapy.
SUBMITTER: Wang Y
PROVIDER: S-EPMC9549789 | biostudies-literature | 2022
REPOSITORIES: biostudies-literature
Frontiers in neurology 20220926
<h4>Background</h4>The Annexin A11 (<i>ANXA11</i>) gene has been newly identified as a causative gene of amyotrophic lateral sclerosis (ALS) with or without frontotemporal dementia (FTD). The current study aimed to investigate the <i>ANXA11</i> mutations in a Chinese ALS-FTD or FTD cohort.<h4>Methods</h4>We included ten probands/patients with suspected ALS-FTD or FTD. Mutational analysis of <i>ANXA11</i> was performed through Next Generation Sequencing (NGS) and Sanger sequencing. We collected a ...[more]