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Dilated and arrhythmogenic cardiomyopathy v3.13 NEXN Ida Ertmanska commented on gene: NEXN: Comment on mode of inheritance: There are now more than 3 cases reported for both mono- and bi- allelic NEXN-related dilated cardiomyopathy cases. Hence, the MOI should be updated to BOTH monoallelic and biallelic, autosomal or pseudoautosomal.
Dilated and arrhythmogenic cardiomyopathy v3.13 NEXN Ida Ertmanska Publications for gene: NEXN were set to 19881492; 27532257
Dilated and arrhythmogenic cardiomyopathy v3.12 NEXN Ida Ertmanska Added comment: Comment on phenotypes: OMIM phenotypes updated 10th Mar 2026. Both dominant and recessive forms of NEXN-related dilated cardiomyopathy are now included in OMIM.
Dilated and arrhythmogenic cardiomyopathy v3.12 NEXN Ida Ertmanska Phenotypes for gene: NEXN were changed from Cardiomyopathy, dilated, 1CC, OMIM:613122 to Cardiomyopathy, dilated, 1CC, OMIM:613122; Cardiomyopathy, dilated, 2M, autosomal recessive, OMIM:621261
Dilated and arrhythmogenic cardiomyopathy v3.11 NEXN Ida Ertmanska Tag Q1_26_MOI tag was added to gene: NEXN.
Dilated and arrhythmogenic cardiomyopathy v3.11 NEXN Ida Ertmanska changed review comment from: Literature review by Achchuthan Shanmugasundram (Genomics England Curator) copied from Paediatric or syndromic cardiomyopathy:

PMID:32058062 - One male foetus was reported with compound heterozygous NEXN variants (c.1756A > T & c.1909_1912del) and dilated cardiomyopathy.

PMID:33027564 - One case was identified with dilated and hypertrophic cardiomyopathy and with compound heterozygous NEXN variants (p.Arg216Ter & p.Lys536fs). However, it was not possible to determine the phase (whether cis or trans) on the basis of exome sequencing.

PMID:33949776 - One patient presented with fetal hydrops at 33  weeks gestation requiring emergency caesarian delivery. Postnatally she required ventilation and continuous inotropic support for left ventricle systolic dysfunction. She died after 2 weeks when therapy was withdrawn. Homozygous c.1174C > T (p.Arg392Ter) variant in the NEXN gene was identified in this patient.

PMID:35166435 - A female from a four-generation Swedish family comprising 42 individuals had three three consecutive pregnancies with intrauterine fetal deaths caused by a lethal form of dilated cardiomyopathy. Homozygous NEXN variant (c.1302del/ p.Ile435Serfs*3) was identified in these foetuses.

In addition to these peer reviewed cases, additional biallelic cases were reported in the following reports: 10.1016/j.jsha.2013.03.180 & 10.1016/j.gimo.2023.100620.

The phenotypes associated with monoallelic variants are already reported in OMIM. However, phenotypes associated with biallelic variants are not yet reported either in OMIM or in Gene2Phenotype.; to: Literature review by Achchuthan Shanmugasundram (Genomics England Curator) copied from Paediatric or syndromic cardiomyopathy:

PMID:32058062 - One male foetus was reported with compound heterozygous NEXN variants (c.1756A > T & c.1909_1912del) and dilated cardiomyopathy.

PMID:33027564 - One case was identified with dilated and hypertrophic cardiomyopathy and with compound heterozygous NEXN variants (p.Arg216Ter & p.Lys536fs). However, it was not possible to determine the phase (whether cis or trans) on the basis of exome sequencing.

PMID:33949776 - One patient presented with fetal hydrops at 33  weeks gestation requiring emergency caesarian delivery. Postnatally she required ventilation and continuous inotropic support for left ventricle systolic dysfunction. She died after 2 weeks when therapy was withdrawn. Homozygous c.1174C > T (p.Arg392Ter) variant in the NEXN gene was identified in this patient.

PMID:35166435 - A female from a four-generation Swedish family comprising 42 individuals had three three consecutive pregnancies with intrauterine fetal deaths caused by a lethal form of dilated cardiomyopathy. Homozygous NEXN variant (c.1302del/ p.Ile435Serfs*3) was identified in these foetuses.

In addition to these peer reviewed cases, additional biallelic cases were reported in the following reports: 10.1016/j.jsha.2013.03.180 & 10.1016/j.gimo.2023.100620.
Dilated and arrhythmogenic cardiomyopathy v3.11 NEXN Ida Ertmanska reviewed gene: NEXN: Rating: GREEN; Mode of pathogenicity: None; Publications: 32058062, 33027564, 33949776, 35166435; Phenotypes: Cardiomyopathy, dilated, 1CC, OMIM:613122, Cardiomyopathy, dilated, 2M, autosomal recessive, OMIM:621261; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Dilated and arrhythmogenic cardiomyopathy v1.28 NEXN Arina Puzriakova Phenotypes for gene: NEXN were changed from Cardiomyopathy, dilated, 1CC (613122); Cardiomyopathy, hypertrophic, 20 (613876); Cardiomyopathy, dilated, 1CC to Cardiomyopathy, dilated, 1CC, OMIM:613122
Dilated and arrhythmogenic cardiomyopathy v0.62 NEXN Ivone Leong Source Expert Review Green was added to NEXN.
Rating Changed from Amber List (moderate evidence) to Green List (high evidence)
Dilated and arrhythmogenic cardiomyopathy v0.61 NEXN Kate Thomson reviewed gene: NEXN: Rating: GREEN; Mode of pathogenicity: ; Publications: ; Phenotypes: ; Mode of inheritance:
Dilated and arrhythmogenic cardiomyopathy v0.52 NEXN Ivone Leong reviewed gene: NEXN: Rating: AMBER; Mode of pathogenicity: ; Publications: ; Phenotypes: ; Mode of inheritance:
Dilated and arrhythmogenic cardiomyopathy v0.46 NEXN James Eden edited their review of gene: NEXN: Changed rating: AMBER
Dilated and arrhythmogenic cardiomyopathy v0.44 NEXN Matthew Edwards changed review comment from: On CGGL Royal Brompton DCM panel currently. Only VUS reported to date (but quite a few) moderate evidence in literature - Animal model for DCM phenotype (zebrafish), and some limited segregation. (LOF likely disease mechanism); to: On CGGL Royal Brompton DCM panel currently. Only VUS reported to date (but quite a few) moderate evidence in literature - Animal model for DCM phenotype (zebrafish), and some limited segregation. (LOF likely disease mechanism). Keep as amber for now.
Dilated and arrhythmogenic cardiomyopathy v0.44 NEXN Matthew Edwards reviewed gene: NEXN: Rating: AMBER; Mode of pathogenicity: None; Publications: 19881492; Phenotypes: ; Mode of inheritance: None; Current diagnostic: yes
Dilated and arrhythmogenic cardiomyopathy v0.19 NEXN Ellen McDonagh Classified gene: NEXN as Amber List (moderate evidence)
Dilated and arrhythmogenic cardiomyopathy v0.19 NEXN Ellen McDonagh Gene: nexn has been classified as Amber List (Moderate Evidence).
Dilated and arrhythmogenic cardiomyopathy v0.18 NEXN Ellen McDonagh Classified gene: NEXN as Green List (high evidence)
Dilated and arrhythmogenic cardiomyopathy v0.18 NEXN Ellen McDonagh Added comment: Comment on list classification: This gene appears on 3/4 gene lists submitted from GLHs, however has a Red review from one of these labs and therefore demoted to Amber for further discussion.
Dilated and arrhythmogenic cardiomyopathy v0.18 NEXN Ellen McDonagh Gene: nexn has been classified as Green List (High Evidence).
Dilated and arrhythmogenic cardiomyopathy v0.0 NEXN Ellen McDonagh gene: NEXN was added
gene: NEXN was added to Dilated cardiomyopathy - adult and teen. Sources: Emory Genetics Laboratory,Expert list,North West GLH,Expert Review Green,London South GLH,Illumina TruGenome Clinical Sequencing Services,Radboud University Medical Center, Nijmegen,South West GLH,UKGTN
Mode of inheritance for gene: NEXN was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: NEXN were set to 19881492; 27532257
Phenotypes for gene: NEXN were set to Cardiomyopathy, dilated, 1CC (613122); Cardiomyopathy, hypertrophic, 20 (613876); Cardiomyopathy, dilated, 1CC