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Disrupted SOX10 regulation of GJC2 transcription causes Pelizaeus-Merzbacher-like disease
Hitoshi Osaka1, Haruka Hamanoue, Ryoko Yamamoto
1Clinical Research Institute, Kanagawa Children's Medical Center, Yokohama, Japan. hosaka@kcmc.jp
Abstract:
Mutations in the gap junction protein gamma-2 gene, GJC2, cause a central hypomyelinating disorder; Pelizaeus-Merzbacher-like disease (PMLD; MIM311601). Using a homozygosity mapping and positional candidate gene approach, we identified a homozygous mutation (c.-167A>G) within the GJC2 promoter at a potent SOX10 binding site in a patient with mild PMLD. Functionally, this mutation completely abolished the SOX10 binding and attenuated GJC2 promoter activity. These findings suggest not only that the SOX10-to-GJC2 transcriptional dysregulation is a cause of PMLD, but also that GJC2 may be in part responsible for the central hypomyelination caused by SOX10 mutations.
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