Raquel Rabionet

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BACKGROUND Hearing impairment affects one infant in 1000 and 4% of people aged younger than 45 years. Congenital deafness is inherited or apparently sporadic. We have shown previously that DFNB1 on chromosome 13 is a major locus for recessive deafness in about 80% of Mediterranean families and that the connexin-26 gene gap junction protein beta2 (GJB2) is(More)
Congenital deafness accounts for about 1 in 1000 infants and approximately 80% of cases are inherited as an autosomal recessive trait. Recently, it has been demonstrated that connexin 26 (GJB2) gene is a major gene for congenital sensorineural deafness. A single mutation (named 35delG) was found in most recessive families and sporadic cases of congenital(More)
Using principal component (PC) analysis, we studied the genetic constitution of 3,112 individuals from Europe as portrayed by more than 270,000 single nucleotide polymorphisms (SNPs) genotyped with the Illumina Infinium platform. In cohorts where the sample size was >100, one hundred randomly chosen samples were used for analysis to minimize the sample size(More)
factors1. Mutations in the connexin26 gene (GJB2), located on 13q12, are responsible for non-syndromic recessive and dominant forms of deafness2–4. Connexin-31 and connexin-32 have also been implicated in deafness5,6. The identification of deaf families linked to 13q12 but negative for mutations in GJB2 (ref. 7) suggested the presence of other deafness(More)
MicroRNAs (miRNAs) are post-transcriptional gene expression regulators, playing key roles in neuronal development, plasticity and disease. Parkinson's disease (PD) is the second most common neurodegenerative disorder, characterized by the presence of protein inclusions or Lewy bodies and a progressive loss of dopaminergic neurons in the midbrain. Here, we(More)
Mutations in the GJB2 gene have been identified in many patients with childhood deafness, 35delG being the most common mutation in Caucasoid populations. We have analyzed a total of 576 families/unrelated patients with recessive or sporadic deafness from Italy and Spain, 193 of them being referred as autosomal recessive, and the other 383 as apparently(More)
The mtDNA variation of 50 Spanish and 4 Cuban families affected by nonsyndromic sensorineural deafness due to the A1555G mutation in the 12S rRNA gene was studied by high-resolution RFLP analysis and sequencing of the control region. Phylogenetic analyses of haplotypes and detailed survey of population controls revealed that the A1555G mutation can be(More)
Misregulation of the methyl-CpG-binding protein 2 (MECP2) gene has been found to cause a myriad of neurological disorders including autism, mental retardation, seizures, learning disabilities, and Rett syndrome. We hypothesized that mutations in other members of the methyl-CpG-binding domain (MBD) family may also cause autistic features in individuals. We(More)
Mutations in the connexin26 (GJB2) gene account for about half of inherited non-syndromic deafness cases in Western countries. The connexin26 protein is a subunit of gap junctions that form a network of intercellular communication among supporting cells and fibrocytes in the mammalian inner ear. Here we describe functional implications of mutations in the(More)
Mutations in the unconventional myosin VI gene, Myo6, are associated with deafness and vestibular dysfunction in the Snell's waltzer (sv) mouse. The corresponding human gene, MYO6, is located on chromosome 6q13. We describe the mapping of a new deafness locus, DFNA22, on chromosome 6q13 in a family affected by a nonsyndromic dominant form of deafness(More)