Differences of Sex Development
Gene: TWNK
Perrault syndrome-5 (PRLTS5) is an autosomal recessive disorder characterized by progressive ataxia, axonal neuropathy, hyporeflexia, and abnormal eye movements, accompanied by progressive hearing loss and ovarian dysgenesis.
PMID: 25355836: 4 women from 2 unrelated families with Perrault syndrome-5.
2 sisters in each family presented with primary amenorrhea, lack of secondary sexual characteristics, and gonadal dysgenesis; 2 sisters in 1 family showed streak ovaries. Three of the 4 girls had onset of sensorineural hearing loss at 7 to 8 years of age; the fourth had onset of hearing loss at age 13. All 4 patients developed neurologic involvement in the second or third decades, with features including ataxia, nystagmus, hyporeflexia, and sensory axonal neuropathy with distal sensory impairment. WES identified compound heterozygous variants in each family, but functional studies of the variants were not performed.
PMID: 31852434: female with severe bilateral hypoacusis, severe ataxia, polyneuropathy, lower limb spastic paraparesis with pyramidal signs, and gonadal dysgenesis, and compound heterozygous variants in TWNK gene (but functional studies of the variants were not performed).
PMID: 31455392: 3 siblings from one family with childhood-onset bilateral sensorineural hearing impairment, neurological signs (spinocerebellar ataxia, polyneuropathy), and gonadal dysfunction with early cessation of menses in the 2 females. WES identified compound heterozygous pathogenic mutations in the TWNK gene, which segregated with disease.
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Sources: LiteratureCreated: 5 Dec 2024, 2:45 a.m.
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
Perrault syndrome 5; MIM# 616138
Publications
Gene: twnk has been classified as Green List (High Evidence).
Phenotypes for gene: TWNK were changed from Perrault syndrome 5; MIM# 616138 to Perrault syndrome 5, MIM# 616138
Publications for gene: TWNK were set to PMID: 25355836, 31852434, 31455392
Gene: twnk has been classified as Green List (High Evidence).
Gene: twnk has been classified as Green List (High Evidence).
gene: TWNK was added gene: TWNK was added to Differences of Sex Development. Sources: Literature Mode of inheritance for gene: TWNK was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TWNK were set to PMID: 25355836, 31852434, 31455392 Phenotypes for gene: TWNK were set to Perrault syndrome 5; MIM# 616138 Review for gene: TWNK was set to GREEN