Browsing by Author "Somdas, MA"

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    The Effect of N-Acetylcysteine on the Neurofilament and Nerve Growth Factor Expression after Gentamicin Induced Cochlear Damage
    Sarsmaz, HY; Gürgen, SG; Somdas, MA
    Objective: To investigate of the effectiveness of N-acetylcysteine (NAC) in preventing cochlear damage due to gentamicin by the means of expression of neuronal factors Metods: In our study, 36 female Spraguea Dawley rats were used. They were divided into 3 groups such as (saline), Gentamicin + Serum physiological (saline) and Gentamicin + NAC. After 15 days, the rats were sacrificed. Cochleae were removed and examined histopathologically. The immunoreactivity of neurofilament and neuronal growth factor primary antibodies was examined in the tissues taken. Results: Neuroflament immunoreactivity was quite significant in afferent and efferent nerve bundles in the saline group and Gentamicin + NAC group, whereas it was weak in the Gentamicin + serum physiological group. Also neuronal growth factor immunoreactivity was moderate in afferent and efferent nerve bundles in the saline group and Gentamicin + NAC group, it was negative at vestibular ganglia, and weak in afferent and efferent nerve fiber bundles in the Gentamicin + serum physiological group. Conclusion: It was shown immunohistochemically that ototoxicity caused by gentamicin was significantly reduced when the NAC combination was applied.
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    N-acetylcysteine Prevents Gentamicin Ototoxicity in a Rat Model
    Somdas, MA; Korkmaz, F; Gürgen, SG; Sagit, M; Akçadag, A
    OBJECTIVE: The possible preventive effect of N-acetylcysteine (NAC) in gentamicin ototoxicity was studied with auditory brain stem responses (ABRs), otoacoustic emissions (OAEs), and histopathological investigation of the cochlea. MATERIALS and METHODS: This study is conducted on 36 rats in three groups. Gentamicin, gentamicin plus NAC, and NAC alone were intraperitoneally administered for 15 days. The rats were sacrificed to study the cochleas after testing hearing levels. RESULTS: ABR thresholds and OAEs were attenuated in the gentamicin group, in which apoptosis was detected with histopathological investigation. The group that received NAC in addition to gentamicin had better ABR thresholds and better OAEs. The histopathological evidence of apoptosis in was considerably less in this group. CONCLUSION: Gentamicin ototoxicity can be detected by ABR and OAE testing in rats, and NAC may protect the cochlear cells from apoptosis.