Chronic Oral Selegiline Treatment Mitigates Age-Related Hearing Loss in BALB/c Mice.

International journal of molecular sciences 2021 Mar 11

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Age-related hearing loss (ARHL), a sensorineural hearing loss of multifactorial origin, increases its prevalence in aging societies. Besides hearing aids and cochlear implants, there is no FDA approved efficient pharmacotherapy to either cure or prevent ARHL. We hypothesized that selegiline, an antiparkinsonian drug, could be a promising candidate for the treatment due to its complex neuroprotective, antioxidant, antiapoptotic, and dopaminergic neurotransmission enhancing effects. We monitored by repeated Auditory Brainstem Response (ABR) measurements the effect of chronic per os selegiline administration on the hearing function in BALB/c and DBA/2J mice, which strains exhibit moderate and rapid progressive high frequency hearing loss, respectively. The treatments were started at 1 month of age and lasted until almost a year and 5 months of age, respectively. In BALB/c mice, 4 mg/kg selegiline significantly mitigated the progression of ARHL at higher frequencies. Used in a wide dose range (0.15-45 mg/kg), selegiline had no effect in DBA/2J mice. Our results suggest that selegiline can partially preserve the hearing in certain forms of ARHL by alleviating its development. It might also be otoprotective in other mammals or humans.

Citation

Judit Szepesy, Viktória Humli, János Farkas, Ildikó Miklya, Júlia Tímár, Tamás Tábi, Anita Gáborján, Gábor Polony, Ágnes Szirmai, László Tamás, László Köles, Elek Sylvester Vizi, Tibor Zelles. Chronic Oral Selegiline Treatment Mitigates Age-Related Hearing Loss in BALB/c Mice. International journal of molecular sciences. 2021 Mar 11;22(6)