Inherited white matter disorders

Gene: PI4KA

Green List (high evidence)

Comment on list classification: Promoted from Amber to Green. There is enough evidence to support a gene-disease association.

Created: 1 Sep 2021, 1:52 p.m. | Last Modified: 1 Sep 2021, 1:52 p.m.

Panel Version: 1.138

This gene is associated with a relevant phenotype in OMIM and Gene2Phenotype.

PMID: 25855803. From OMIM: "3 fetuses were all diagnosed in utero with multiple congenital anomalies resulting in the termination of pregnancy between 16 and 34 weeks' gestation. All fetuses had bilateral perisylvian polymicrogyria and cerebellar hypoplasia or dysplasia. One had a small pons. Additional features included severe talipes equinovarus, externally rotated hips, and variable contractures of the limbs or fingers."

PMID:34415322. 10 patients from 10 unrelated families with biallelic varaints in PI4KA. Patients showed a spectrum of severe global neurodevelopmental delay (8/10 moderate to severe ID), hypomyelination, cerebellar hyoplasia (1/10), cerebellar atrophy (5/10), bilateral perisylvian polymicrogyria (1/10), immunological problems (hypogammaglobulinaemia, lymphopaenia, and autoimmune neutorpaenia - 4/10), bowl dysfunction (4/10). Age of onset ranged from newborn to 17 years.

PMID: 34415310. 7 unrelated families. Family 1: Amish. Severe extensive multiple intestinal atresia, IBD and combined immunodeficiency (2/4). Families 3 - 8 all have 1 affected individual, (Turkish, Indian, German and Italian). Global developmental delay (all), ID (severe to mild), cerebellar and/or brainstem anomalies (3/6), spasticity (all), immature gyral pattern (1/6), leukodystrophy (6/6), multiple intestinal atresia (0/6), IBD (3/6), combined immunodeficiency (2/6). Early age of onset.

Created: 1 Sep 2021, 1:47 p.m. | Last Modified: 1 Sep 2021, 1:47 p.m.

Panel Version: 2.230

Publications

• 25855803
• 34415322
• 34415310