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Expression of advanced glycation end-product receptors in the cochlea

Claudia Hanusek1, Cristian Setz, Vesna Radojevic

  • 1Department of Biomedicine, University Hospital Basel, Basel, Switzerland.

The Laryngoscope
|June 1, 2010
PubMed
Abstract

Insights

Advanced glycation end product (AGE) receptors, RAGE and Ddost (AGE-R1), are present in the cochlea. Their expression differs between immature and mature inner ear tissues, suggesting a role in auditory development and aging.

Area of Science:

  • Otolaryngology
  • Aging Research
  • Molecular Biology

Background:

  • Advanced glycation end products (AGEs) are linked to aging in various tissues.
  • The role of AGEs and their receptors in the mammalian inner ear remains largely unexplored.

Purpose of the Study:

  • To investigate the expression of two key AGE receptors, RAGE and Ddost (AGE-R1), in the mammalian cochlea.
  • To determine the localization of these receptors within the inner ear structures, including the organ of Corti.

Main Methods:

  • Utilized reverse transcriptase-polymerase chain reaction (RT-PCR) and Western blot to analyze receptor expression at mRNA and protein levels in rat cochleas.
  • Employed immunohistochemistry to specifically localize RAGE and Ddost (AGE-R1) within the mouse organ of Corti.

Main Results:

  • Confirmed the presence of RAGE and Ddost (AGE-R1) mRNA and protein in the cochlea, spiral ganglion, and stria vascularis.
  • Successfully identified both receptors within the organ of Corti in both immature and mature specimens.

Conclusions:

  • The AGE receptors RAGE and Ddost (AGE-R1) are demonstrably present in the cochlea.
  • Observed distinct expression patterns for RAGE and Ddost (AGE-R1) between immature and mature inner ear tissues, indicating potential roles in development and aging.

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