DFNB68, a novel autosomal recessive non-syndromic hearing impairment locus at chromosomal region 19p13.2

Hum Genet. 2006 Aug;120(1):85-92. doi: 10.1007/s00439-006-0188-z. Epub 2006 May 16.


From a large collection of families with autosomal recessive non-syndromic hearing impairment (NSHI) from Pakistan, linkage has been established for two unrelated consanguineous families to 19p13.2. This new locus was assigned the name DFNB68. A 10 cM genome scan and additional fine mapping were carried out using microsatellite marker loci. Linkage was established for both families to DFNB68 with maximum multipoint LOD scores of 4.8 and 4.6. The overlap of the homozygous regions between the two families was bounded by D19S586 and D19S584, which limits the locus interval to 1.9 cM and contains 1.4 Mb. The genes CTL2, KEAP1 and CDKN2D were screened but were negative for functional sequence variants.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chromosome Mapping
  • Chromosomes, Human, Pair 19 / genetics*
  • Consanguinity
  • Family Health
  • Female
  • Genes, Recessive*
  • Genetic Linkage
  • Genetic Predisposition to Disease / genetics*
  • Genotype
  • Hearing Loss / genetics*
  • Humans
  • Intracellular Signaling Peptides and Proteins / genetics
  • Kelch-Like ECH-Associated Protein 1
  • Lod Score
  • Male
  • Membrane Glycoproteins / genetics
  • Membrane Transport Proteins / genetics
  • Microsatellite Repeats
  • Pedigree
  • Sequence Analysis, DNA


  • Intracellular Signaling Peptides and Proteins
  • KEAP1 protein, human
  • Kelch-Like ECH-Associated Protein 1
  • Membrane Glycoproteins
  • Membrane Transport Proteins
  • SLC44A2 protein, human