De novo HDAC8 mutation causes Rett-related disorder with distinctive facial features and multiple congenital anomalies

Publication date: Available online 5 March 2018
Source:Brain and Development
Author(s): Tomoko Saikusa, Munetsugu Hara, Kazuhiro Iwama, Kotaro Yuge, Chihiro Ohba, Jun-ichiro Okada, Tadashi Hisano, Yushiro Yamashita, Nobuhiko Okamoto, Hirotomo Saitsu, Naomichi Matsumoto, Toyojiro Matsuishi
We present a unique 11-year-old girl showing clinical features of Rett-related disorder with distinctive facial features and multiple congenital anomalies including ocular hypertelorism, arched eyebrows, a broad nose, dental anomalies, congenital heart disease, truncal obesity, and epilepsy. A novel de novo mutation in histone deacetylase 8 (HDAC8) (c.652G > T, p.Gly218Cys) was confirmed by whole exome sequencing and Sanger sequencing. X-chromosome inactivation analysis on DNA isolated from peripheral blood lymphocytes revealed a completely skewed pattern associated with an inactive maternal allele. Late clinical loss of acquired purposeful hand movements and psychomotor deterioration may be a feature of Rett-related disorder, while distinctive facial features and multiple congenital anomalies are reminiscent of Cornelia de Lange syndrome.



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