Premium
Somatostatin and gentamicin‐induced auditory hair cell loss
Author(s) -
Caelers Antje,
Monge Arianne,
Brand Yves,
Bodmer Daniel
Publication year - 2009
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1002/lary.20058
Subject(s) - somatostatin , somatostatin receptor , hair cell , cochlea , organ of corti , medicine , spiral ganglion , endocrinology , neuropeptide , ototoxicity , receptor , anatomy , chemotherapy , cisplatin
Objective/Hypothesis: Hair cells of the mammalian auditory system do not regenerate, and therefore their loss leads to irreversible hearing loss. Aminoglycosides, among other substances, can irreversibly damage hair cells. Somatostatin, a peptide with hormone/neurotransmitter properties, has neuroprotective effects by binding to its receptor. In this study, we tested whether somatostatin can protect hair cells from gentamicin‐induced damage in vitro. Study Design: This study confirmed the expression of somatostatin receptor mRNA within the cochlea and analyzed the effect of somatostatin on gentamicin‐induced hair cell damage and death in vitro. Methods: Expression of somatostatin receptor mRNA in the rat cochlea was analyzed by reverse transcriptase‐polymerase chain reaction (RT‐PCR). Protection of auditory hair cells from gentamicin was tested using two different concentrations (1 μM and 5 μM, respectively) of somatostatin. Results: We detected somatostatin receptor‐1 and ‐2 mRNA and in the organ of Corti (OC), spiral ganglion, and stria vascularis by RT‐PCR. Moreover, we could see significantly less hair cell loss in the OCs that were pretreated with either 1 μM or 5 μM of somatostatin as compared with samples treated with gentamicin alone. Conclusions: Decreased hair cell loss in somatostatin‐treated samples that had been exposed to gentamicin provides evidence for a protective effect of somatostatin in aminoglycoside‐induced hair cell death in vitro.