Genes in panel
Regions in panel
Prev Next

Intellectual disability

Gene: TRIM8

Green List (high evidence)

TRIM8 (tripartite motif containing 8)
EnsemblGeneIds (GRCh38): ENSG00000171206
EnsemblGeneIds (GRCh37): ENSG00000171206
OMIM: 606125, Gene2Phenotype
TRIM8 is in 3 panels

2 reviews

Rebecca Foulger (Genomics England curator)

Comment on list classification: TRIM8 was added to the panel and rated Green by Konstantinos Varvagiannis. Assoum et al, (PMID:30244534) summarises six patients with TRIM8 variants; four new patients plus two previous patients from Sakai et al., 2016 (PMID:27346735) and Epi4K Consortium (PMID:23934111). All six patients had global developmental delay and/or intellectual disability (summarised in Table 1). Therefore although TRIM8 is not currently associated with a disorder in OMIM or Gene2Phenotype, there are sufficient unrelated cases from multiple publications to support a Green (diagnostic) rating on the ID panel.
Created: 14 May 2019, 1:05 p.m.

Konstantinos Varvagiannis (Other)

Green List (high evidence)

PMID: 30244534 is a collaborative study reporting on the phenotype of TRIM8-related epileptic encephalopathy and summarizing the findings in previously published patients. Developmental delay, intellectual disability, seizures are common findings in the 6 unrelated individuals reported. Proteinuria was observed in 3 subjects.

Seizures were universal feature with highly variable age of onset (2 months to 3 years and 5 months).

Several individuals were investigated for developmental delay prior to seizure onset (eg. pat.1 had an MRI at 10 months, sat at 16 months, walked at 22 months and developed seizures at 2 years, pat.3 sat at 12 months, walked at 22 and developed seizures at 3 years and 5 months, pat. 4 and 5 had significant/severe delay prior to the age of 21 months when they started having seizures).

All variants reported to date are truncating, affecting the last (sixth exon) and as a result may escape nonsense-mediated decay. Since TRIM8 homodimerizes via its (upstream) coiled-coil domain and its C-terminal domain is required for nuclear localization, a dominant-negative effect is postulated by the authors. Haploinsufficiency appears less likely.

A previously reported patient (from PMID: 27346735) as well as an individual reported by the Epi4K consortium (PMID: 23934111 - among the co-authors of the present study) are included in the table of this article.

As a result this gene can be considered for inclusion in the intellectual disability and epilepsy panels as green.
Sources: Expert Review, Literature
Created: 17 Oct 2018, 2:36 p.m.

Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown

Phenotypes
Global developmental delay; Intellectual disability; Seizures

Publications

Details

Mode of Inheritance
MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Sources
Phenotypes
  • Global developmental delay
  • Intellectual disability
  • Seizures
OMIM
606125
Clinvar variants
Variants in TRIM8
Penetrance
Complete
Publications
Panels with this gene

History Filter Activity

14 May 2019, Gel status: 3

Entity classified by Genomics England curator

Rebecca Foulger (Genomics England curator)

Gene: trim8 has been classified as Green List (High Evidence).

14 May 2019, Gel status: 0

Entity classified by Genomics England curator

Rebecca Foulger (Genomics England curator)

Gene: trim8 has been removed from the panel.

17 Oct 2018, Gel status: 0

Created, Added New Source, Set mode of inheritance, Set publications, Set Phenotypes, Set penetrance

Konstantinos Varvagiannis (Other)

gene: TRIM8 was added gene: TRIM8 was added to Intellectual disability. Sources: Expert Review,Literature Mode of inheritance for gene: TRIM8 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: TRIM8 were set to 30244534; 27346735; 23934111 Phenotypes for gene: TRIM8 were set to Global developmental delay; Intellectual disability; Seizures Penetrance for gene: TRIM8 were set to Complete Review for gene: TRIM8 was set to GREEN