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    Do viral infections have a role in benign paroxysmal positional vertigo?
    (Royal Belgian Soc Ear, Nose, Throat, Head & Neck Surgery, 2015) Hanci, D.; Ulusoy, S.; Muluk, N. B.; Cingi, C.
    Do viral infections have a role in benign paroxysmal positional vertigo? Objectives: To investigate the role of viral infection in benign paroxysmal positional vertigo (BPPV). Methods: In this retrospective study, 483 patients with BPPV were included in the study group. The control group consisted of 461 healthy subjects. In both groups, serologic analysis of viral agents (HSV1, HSV2, Herpes zoster, EBV, CMV, adenovirus, influenza, and parainfluenza virus) was performed. Results: With the exception of influenza and parainfluenza, all viral serology values were higher in the BBPV group than the control group. We also observed seasonal variation. The BPPV group exhibited elevated values for HSV1 and adenovirus in March and May, for Herpes zoster, adenovirus, and influenza in April, for HSV1 in June, and for HSV1 and CMV in September, compared to the control group. In October, the BPPV group showed increased values for all of the viruses studied, compared to the control group. Conclusion: BPPV is associated with positive viral serology, particularly during certain months of the year, mainly in spring and autumn. Viral infection might promote BPPV attacks due to the development of vestibulopathy or induce secondary BPPV via viral infection-related neurolabyrinthitis.
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    Potential protective effect of resveratrol on acoustic trauma: electron microscopy study
    (Verduci Publisher, 2016) Hanci, D.; Ulusoy, S.; Acar, M.; Burukoglu, D.; Kutlu, H. M.; Muluk, N. Bayar; Cingi, C.
    OBJECTIVE: To investigate the potential preventive effect of resveratrol in rats exposed to acoustic trauma (AT). MATERIALS AND METHODS: In this experimental study, Wistar albino rats were divided into three groups: Group 1 (Control, n = 6), Group 2 (AT, n = 6), and Group 3 (resveratrol + AT). The rats in Group 2 were exposed to AT. The rats in Group 3 received resveratrol (300 mg/kg/day) via gavage for 7 days. On day 7, the rats were exposed to AT 10 min following resveratrol treatment. Histological sections of the cochleae were examined using light microscopy, transmission (TEM), and scanning electron microscopy (SEM). RESULTS: The cochlear hair cells, stereocilia, and Deiters' cells of the control group appeared normal in all microscopic evaluations. In Group 2, light microscopy revealed predominantly inner hair cell loss, although the outer hair cells were affected. TEM and SEM examination showed severe loss of stereocilia and SEM revealed stereocilia arranged in an asymmetric array. The cochlear structure in Group 3 appeared well preserved under the light microscope, and although TEM and SEM revealed stereocilia loss, the hair cells and stereocilia appeared near normal compared with those of Group 2. CONCLUSIONS: Resveratrol may have a protective effect against AT damage in the cochlea, most likely through its antioxidant activity. Our results may be useful for studies in humans exposed to AT and noise-induced hearing loss related to chronic exposure to occupational noise.