Early onset or syndromic epilepsy
Gene: ZNF335The rating of this gene has been updated following NHS Genomic Medicine Service approval.Created: 3 Mar 2022, 5:34 p.m. | Last Modified: 3 Mar 2022, 5:34 p.m.
Panel Version: 2.491
Comment on list classification: Rating Amber, but should be promoted to Green at the next GMS panel update (added 'for-review' tag) as there are sufficient unrelated cases to support a gene-disease association.Created: 27 Oct 2020, 12:41 p.m. | Last Modified: 27 Oct 2020, 12:41 p.m.
Panel Version: 2.203
At least 6 unrelated families reported in literature with different biallelic variants in ZNF335. Microcephaly is the primary feature, but also commonly in association with a variable epilepsy phenotype.
Stouffs et al. (PMID:29652087) report 2 unrelated cases: patient A, demonstrating refractory seizures leading to death at age 5 days, whereas patient B lacked any clinical seizures, but had frequent spasms that have yet to be recorded by EEG. The proband in Sato et al. (PMID:27540107) had rare focal seizures controlled by treatment. Although not noted by Yang et al. (PMID:231781260), affected individuals in that family had seizures described as paroxysmal myoclonic jerks (personal communication with Stouffs et al). The case by Rana et al. (PMID:31187448) presented multifocal drug-resistant epilepsy, and while details were limited in McSherry et al. (PMID:30500859), authors did also note seizures.
Sources: LiteratureCreated: 27 Oct 2020, 12:40 p.m.
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
Microcephaly 10, primary, autosomal recessive, 615095
Publications
Tag for-review was removed from gene: ZNF335.
Source Expert Review Green was added to ZNF335. Rating Changed from Amber List (moderate evidence) to Green List (high evidence)
Gene: znf335 has been classified as Amber List (Moderate Evidence).
gene: ZNF335 was added gene: ZNF335 was added to Genetic epilepsy syndromes. Sources: Literature for-review tags were added to gene: ZNF335. Mode of inheritance for gene: ZNF335 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ZNF335 were set to 23178126; 27540107; 29652087; 30500859; 31187448 Phenotypes for gene: ZNF335 were set to Microcephaly 10, primary, autosomal recessive, 615095 Review for gene: ZNF335 was set to GREEN