A family with Townes-Brocks syndrome with congenital hypothyroidism and a novel mutation of the SALL1 gene
نویسندگان
چکیده
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 with TBS, help in the differential diagnosis of these syndromes. We report the case of a family whose members were diagnosed with TBS with congenital hypothyroidism and had a novel SALL1 gene mutation.
منابع مشابه
Variable expression observed in a Korean family with Townes-Brocks syndrome caused by a SALL1 mutation
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 ...
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 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 کاملSall1 regulates cortical neurogenesis and laminar fate specification in mice: implications for neural abnormalities in Townes-Brocks syndrome
Progenitor cells in the cerebral cortex undergo dynamic cellular and molecular changes during development. Sall1 is a putative transcription factor that is highly expressed in progenitor cells during development. In humans, the autosomal dominant developmental disorder Townes-Brocks syndrome (TBS) is associated with mutations of the SALL1 gene. TBS is characterized by renal, anal, limb and audi...
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...
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