Semin Hear 2006; 27(3): 136-147
DOI: 10.1055/s-2006-947281
Copyright © 2006 by Thieme Medical Publishers, Inc., 333 Seventh Avenue, New York, NY 10001, USA.

Epidemiology of Genetic Hearing Loss

Bronya J.B Keats1 , Charles I. Berlin2 , Paula Gregory3
  • 1Professor and Chair, Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, Louisiana
  • 2Professor Emeritus, Kresge Hearing Research Laboratory, Louisiana State University Health Sciences Center, New Orleans, Louisiana
  • 3Associate Professor, Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, Louisiana
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Publication History

Publication Date:
17 July 2006 (online)

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ABSTRACT

Epidemiological studies more than a century ago demonstrated that genetic factors are major contributors to hearing loss. Many genes associated with hearing loss have now been identified, although mutations in one of them, GJB2, explain a high proportion of genetic deafness in several populations. Environmental factors such as viruses (in particular, cytomegalovirus), ototoxic drugs, and noise also are associated with hearing loss, as is the aging process. Genetic hearing loss may be either syndromic (other organs and tissues are abnormal) or nonsyndromic. The majority show an autosomal recessive pattern of inheritance, but autosomal dominant, X-linked, and mitochondrial forms of hearing loss are found. In this article, four hearing loss syndromes, Jervell and Lange-Nielsen, Wolfram, branchio-otorenal, and Alport, are described; respectively, they are caused by mutations in genes encoding a potassium channel complex (KCNQ1, KCNE1), extracellular matrix proteins (COL4A3, COL4A4, COL4A5), transcription factors (EYA1, SIX1), and a protein that may be a novel endoplasmic reticulum calcium channel or a regulator of channel activity (WFS1). The contribution of mitochondrial DNA (mtDNA) mutations to hearing loss also is discussed.

REFERENCES

Bronya J.B KeatsPh.D. 

Department of Genetics, Louisiana State University Health Sciences Center

533 Bolivar Street, New Orleans, LA 70112

Email: bkeats@lsuhsc.edu