Variable expression observed in a Korean family with Townes-Brocks syndrome caused by a SALL1 mutation
نویسندگان
چکیده
Commonly affected anomalies are anorectal malformations (imperforate anus, anteriorly placed anus, anal stenosis), hand malformations (preaxial polydactyly, triphalangeal thumb, bifid thumb), external ear malformations (microtia, “satyr” or “lop” ear, preauricular tag or pits) with sensorineural hearing loss, and renal malformations. In addition, intellectual disability, learning problems, and cardiac anomalies have been reported in TBS [46]. Cytogenetic findings provided the first indication of the causative gene for TBS, and SALL1 was mapped to chromosome Variable expression observed in a Korean family with Townes-Brocks syndrome caused by a SALL1 mutation
منابع مشابه
A family with Townes-Brocks syndrome with congenital hypothyroidism and a novel mutation of the SALL1 gene
Townes-Brocks syndrome (TBS) is a rare autosomal dominant congenital disorder caused by mutations in the SALL1 gene. Its signs and symptoms overlap with other genetic syndromes, including VACTERL association, Pendred syndrome, Baller-Gerold syndrome, and cat eye syndrome. Structural vertebral abnormalities, hypoplasia of the thumb, and radial bone abnormalities, which are not usually associated...
متن کاملOkihiro syndrome is caused by SALL4 mutations.
Okihiro syndrome refers to the association of forearm malformations with Duane syndrome of eye retraction. Based on the reported literature experience, clinical diagnosis of the syndrome can be elusive, owing to the variable presentation in families reported. Specifically, there is overlap of clinical features with other conditions, most notably Holt-Oram syndrome, a condition resulting from mu...
متن کاملExpression of a truncated Sall1 transcriptional repressor is responsible for Townes-Brocks syndrome birth defects.
Townes-Brocks syndrome (TBS, OMIM #107480) is an autosomal dominant disorder that causes multiple birth defects including renal, ear, anal and limb malformations. Mutations in SALL1 have been postulated to cause TBS by haploinsufficiency; however, a mouse model carrying a sall1-null allele does not mimic the human syndrome. Since the mutations that cause TBS could express a truncated SALL1 prot...
متن کاملEmbryonic expression of the murine homologue of SALL1, the gene mutated in Townes–Brocks syndrome
SALL1 is one of three human homologues of the Drosophila region-specific homeotic gene spalt (sal). Mutations of SALL1 on chromosome 16q12.1 cause Townes--Brocks syndrome (TBS) which is characterized by defects in multiple organ systems including limbs, ears, kidneys and anus. Here, we have analyzed the expression of the mouse homologue of SALL1 (Sall1) during early embryogenesis. Sall1 express...
متن کاملMolecular analysis of SALL1 mutations in Townes-Brocks syndrome.
Townes-Brocks syndrome (TBS) is an autosomal dominantly inherited malformation syndrome characterized by anal, renal, limb, and ear anomalies. Recently, we showed that mutations in the putative zinc finger transcription factor gene SALL1 cause TBS. To determine the spectrum of SALL1 mutations and to investigate the genotype-phenotype correlations in TBS, we examined 23 additional families with ...
متن کامل