| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
Hypomyelinating leukodystrophy is a heterogeneous group of diseases. We studied 29 patients with hypomyelinating leukodystrophy to uncover their genetic etiology through chromosomal analyses, targeted gene analyses, array comparative genomic hybridization (aCGH) assay and whole-exome sequencing (WES). The presumptive diagnoses were confirmed in 62.1% of the enrolled patients (18/29). The most frequent backgrounds were 18q deletion syndrome and Pelizaeus-Merzbacher disease, with an incidence of 11% (3/29) for both. The diagnostic rate of aCGH was 6.9% (2/29). Using WES, the following causative genes of hypomyelination were identified in eight individuals (27.6%, 8/29): TUBB4A, POLR3B, KCNT1, MCOLN1,AHDC1 and X. Our findings suggest heterogeneous genetic backgrounds in patients with persistent white matter lesions. These data also indicate that WES may be a rapid and useful tool for identifying the underlying genetic causes of undiagnosed leukodystrophies.
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