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Hereditary neuropathy or pain disorder v6.163 DHX9 Achchuthan Shanmugasundram Added comment: Comment on phenotypes: This gene has now been associated with relevant phenotypes in OMIM (MIM #620988).
Hereditary neuropathy or pain disorder v6.163 DHX9 Achchuthan Shanmugasundram Phenotypes for gene: DHX9 were changed from Adult-onset axonal neuropathy; Charcot-Marie-Tooth disease, MONDO:0015626 to Intellectual developmental disorder, autosomal dominant 75, OMIM:620988
Hereditary neuropathy or pain disorder v6.162 DHX9 Achchuthan Shanmugasundram Tag gene-checked was removed from gene: DHX9.
Hereditary neuropathy or pain disorder v4.10 DHX9 Eleanor Williams Tag gene-checked tag was added to gene: DHX9.
Hereditary neuropathy or pain disorder v4.4 DHX9 Arina Puzriakova Tag Q3_23_promote_green was removed from gene: DHX9.
Hereditary neuropathy or pain disorder v4.3 DHX9 Arina Puzriakova edited their review of gene: DHX9: Added comment: The rating of this gene has been updated to Green and the mode of inheritance set to 'MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted' following NHS Genomic Medicine Service approval.; Changed rating: GREEN; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Hereditary neuropathy or pain disorder v4.2 DHX9 Arina Puzriakova Source NHS GMS was added to DHX9.
Source Expert Review Green was added to DHX9.
Rating Changed from Amber List (moderate evidence) to Green List (high evidence)
Hereditary neuropathy or pain disorder v3.44 DHX9 Achchuthan Shanmugasundram Classified gene: DHX9 as Amber List (moderate evidence)
Hereditary neuropathy or pain disorder v3.44 DHX9 Achchuthan Shanmugasundram Added comment: Comment on list classification: There is sufficient evidence available (three unrelated cases) for promoting this gene to green rating in the next major update.
Hereditary neuropathy or pain disorder v3.44 DHX9 Achchuthan Shanmugasundram Gene: dhx9 has been classified as Amber List (Moderate Evidence).
Hereditary neuropathy or pain disorder v3.43 DHX9 Achchuthan Shanmugasundram Tag watchlist was removed from gene: DHX9.
Tag Q3_23_promote_green tag was added to gene: DHX9.
Hereditary neuropathy or pain disorder v3.43 DHX9 Achchuthan Shanmugasundram Phenotypes for gene: DHX9 were changed from Adult-onset axonal neuropathy to Adult-onset axonal neuropathy; Charcot-Marie-Tooth disease, MONDO:0015626
Hereditary neuropathy or pain disorder v3.42 DHX9 Achchuthan Shanmugasundram Publications for gene: DHX9 were set to
Hereditary neuropathy or pain disorder v3.41 DHX9 Achchuthan Shanmugasundram Mode of inheritance for gene: DHX9 was changed from MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Hereditary neuropathy or pain disorder v3.40 DHX9 Achchuthan Shanmugasundram reviewed gene: DHX9: Rating: GREEN; Mode of pathogenicity: None; Publications: 37467750; Phenotypes: Charcot-Marie-Tooth disease, MONDO:0015626; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Hereditary neuropathy or pain disorder v1.25 DHX9 Arina Puzriakova Classified gene: DHX9 as Red List (low evidence)
Hereditary neuropathy or pain disorder v1.25 DHX9 Arina Puzriakova Added comment: Comment on list classification: Rating this gene as Red, but with a watchlist tag, until more evidence is available.
Hereditary neuropathy or pain disorder v1.25 DHX9 Arina Puzriakova Gene: dhx9 has been classified as Red List (Low Evidence).
Hereditary neuropathy or pain disorder v1.24 DHX9 Arina Puzriakova gene: DHX9 was added
gene: DHX9 was added to Hereditary neuropathy NOT PMP22 copy number. Sources: Other
watchlist tags were added to gene: DHX9.
Mode of inheritance for gene: DHX9 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Phenotypes for gene: DHX9 were set to Adult-onset axonal neuropathy
Added comment: Conference poster (Genomics of Rare Disease 2021) - 'DExH-box helicase 9 (DHX9) is a candidate hereditary axonal neuropathy gene' by Fatih et al, Baylor College of Medicine -

Report three unrelated individuals with adult-onset axonal neuropathy (age of onset: 41, 49, and 12 years old, respectively). Clinical features include limb weakness (3), muscle atrophy (2), diminished sensation in feet (2; plus in hands in 1 individual), ataxic gait (1), and painful neuropathy (1). All subjects exhibited neurogenic changes on EMG, and 2 cases also had normal or absent motor and sensory NCV.
Exome sequencing revealed distinct heterozygous variants in the DHX9 gene ([c.2537A>G, p.Asp846Gly]; [c.2510G>C, p.Arg837Thr]; [c.3763G>A, p.Ala1255Thr]). Segregation data was only available for one case, showing de novo occurrence. No functional data presented.

These variants have to be validated and currently DHX9 is deemed a candidate gene. No other publications in relation to this gene and phenotype are available in PubMed at this time.

Baylor College of Medicine POC: Dr. Daniel Calame, [email protected]
Sources: Other