Biallelic P4HTM variants associated with HIDEA syndrome and mitochondrial respiratory chain complex I deficiency.

ABSTRACT: We report a patient with profound congenital hypotonia, central hypoventilation, poor visual behaviour with retinal hypopigmentation, and significantly decreased mitochondrial respiratory chain complex I activity in muscle, who died at 7 months of age having made minimal developmental progress. Biallelic predicted truncating P4HTM variants were identified following trio whole-genome sequencing, consistent with a diagnosis of hypotonia, hypoventilation, intellectual disability, dysautonomia, epilepsy and eye abnormalities (HIDEA) syndrome. Very few patients with HIDEA syndrome have been reported previously and mitochondrial abnormalities were observed in three of four previous cases who had a muscle biopsy, suggesting the possibility that HIDEA syndrome represents a primary mitochondrial di

SUBMITTER: Hay E 

PROVIDER: S-EPMC8484625 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature