Apoptosis induction after HSV infection on facial and auditory nerve

2015 Fiscal Year Final Research Report

• Project/Area Number: 25861579
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Otorhinolaryngology
• Research Institution: Nagoya City University
• Principal Investigator: Yamano Koji 名古屋市立大学, 医学(系)研究科(研究院), 研究員 (20597819)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 単純ヘルペスウイルス / 顔面神経 / 聴神経

Outline of Final Research Achievements

HSV types 1 and 2 were inoculated into the middle ear of mice, and the function of the cochlear and vestibular nerves was assessed. Histopathological changes were examined with hematoxylin and eosin staining. Anti-HSV immunohistochemistry staining and TUNEL staining were done to investigate the relationship between HSV-infected cells and apoptotic cells. Results: Hearing loss and vestibular dysfunction were observed in all mice after inoculation of HSV type 1 or 2. In the cochlear duct, columnar epithelial cells in the stria vascularis were infected with HSV, but only a portion of the infected cells underwent apoptosis. In contrast, many uninfected cells in the spiral organ of Corti were apoptotic. Vestibular dysfunction was observed when vestibular ganglion cells were largely infected, but not apoptotic.
Next, we injected AM-111, anti-apoptosis peptide into the middle ear of mice. However, no effect was observed.

Free Research Field

顔面神経麻痺