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Garasto E, Stefani A, Pierantozzi M, Cerroni R, Conti M, Maranesi S, Mercuri NB, Chiaravalloti A, Schillaci O, Viziano A, Moleti A, Sisto R. Association between hearing sensitivity and dopamine transporter availability in Parkinson's disease. Brain Commun 2023; 5:fcad075. [PMID: 37006327 PMCID: PMC10065189 DOI: 10.1093/braincomms/fcad075] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/08/2023] [Accepted: 03/18/2023] [Indexed: 04/03/2023] Open
Abstract
In a previous study, we observed: (i) significant hearing function impairment, assessed with pure tone audiometry and distortion product otoacoustic emissions, in patients with Parkinson's disease, compared with a matched control group, and (ii) lateralization of the hearing dysfunction, worse on the side affected by more pronounced Parkinson's disease motor symptoms. This study investigates the association between the basal ganglia dopamine transporter availability and the hearing function in Parkinson's disease patients, focusing also on the lateralization of both dysfunctions, with respect to that of the motor symptoms, and introducing a further distinction between patients with left-sided and right-sided predominant motor symptoms. Patients with right-handed Parkinson's disease with a recent estimation of 123I-FP-CIT striatal uptake were audiologically tested with pure tone audiometry and distortion product otoacoustic emissions. Thirty-nine patients were included in the study. A statistically significant association was found, in the left-side predominant group only, between the distortion product otoacoustic emission levels and the contralateral dopamine transporter availability, and between the hearing threshold and the dopamine transporter availability difference between the ipsi- and the contralateral sides. The hearing impairment lateralization correlated to the motor symptom asymmetry was found significant only in the left-side predominant patients. The association between hearing function and basal ganglia dopamine transporter availability supports the hypothesis that the peripheral hearing function decline associated with dopamine depletion is involved in Parkinson's disease development, with a significant difference between patients with left- and right-sided predominant motor symptoms. These findings also suggest that peripheral hearing function evaluation and its lateralization could be key elements for subtyping the disease.
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Affiliation(s)
- Elena Garasto
- Parkinson’s Center, Department of Systems Medicine, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Alessandro Stefani
- Correspondence to: Alessandro Stefani, PhD Department of Systems Medicine, Parkinson’s Disease Center University of Rome ‘Tor Vergata’ Viale Oxford 81, Rome 00133, Italy E-mail:
| | - Mariangela Pierantozzi
- Parkinson’s Center, Department of Systems Medicine, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Rocco Cerroni
- Parkinson’s Center, Department of Systems Medicine, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Matteo Conti
- Parkinson’s Center, Department of Systems Medicine, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Simone Maranesi
- Parkinson’s Center, Department of Systems Medicine, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Nicola B Mercuri
- Parkinson’s Center, Department of Systems Medicine, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Agostino Chiaravalloti
- Department of Biomedicine and Prevention, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Orazio Schillaci
- Department of Biomedicine and Prevention, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Andrea Viziano
- Department of Clinical Sciences and Translational Medicine, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Arturo Moleti
- Department of Physics and NAST Centre, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Renata Sisto
- Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, INAIL Research, Monte Porzio Catone (Rome)00078, Italy
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