PubMed · 3608317
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R Kakigi, H Shibasaki, Y Tomiyoshi, Y Kuroda, K Oda. 1987. [Acquired oculomotor apraxia: a case report].. https://pubmed.ncbi.nlm.nih.gov/3608317/
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Corticobasal syndrome (CBS) is a rare cognitive and movement disorder characterized by asymmetric rigidity, apraxia, alien-limb phenomenon, cortical sensory loss, myoclonus, focal dystonia, and dementia. It occurs along the clinical spectrum of frontotemporal lobar degeneration (FTLD), which has recently been shown to segregate with truncating mutations in progranulin (PGRN), a multifunctional growth factor thought to promote neuronal survival. This study identifies a novel splice donor site mutation in the PGRN gene (IVS7+1G-->A) that segregates with CBS in a Canadian family of Chinese origin. We confirmed the absence of the mutant PGRN allele in the RT-PCR product which supports the model of haploinsufficiency for PGRN-linked disease. This report of mutation in the PGRN gene in CBS extends the evidence for genetic and phenotypic heterogeneity in FTLD spectrum disorders.