Behav Brain Res. 2022 Feb 10;418:113642. doi: 10.1016/j.bbr.2021.113642. Epub 2021 Oct 28.
Manipulation of vocal communication and anxiety through pharmacologic modulation of norepinephrine in the Pink1-/- rat model of Parkinson disease.
Behavioural brain research
Jesse D Hoffmeister, Cynthia A Kelm-Nelson, Michelle R Ciucci
Affiliations
Affiliations
- Department of Communication Sciences and Disorders, University of Wisconsin-Madison, 1975 Willow Drive, Madison, WI 53706, USA; Department of Surgery, Division of Otolaryngology-Head & Neck Surgery, University of Wisconsin-Madison, 600 Highland Avenue, Madison, WI 53792-7375, USA. Electronic address: [email protected].
- Department of Surgery, Division of Otolaryngology-Head & Neck Surgery, University of Wisconsin-Madison, 600 Highland Avenue, Madison, WI 53792-7375, USA. Electronic address: [email protected].
- Department of Communication Sciences and Disorders, University of Wisconsin-Madison, 1975 Willow Drive, Madison, WI 53706, USA; Department of Surgery, Division of Otolaryngology-Head & Neck Surgery, University of Wisconsin-Madison, 600 Highland Avenue, Madison, WI 53792-7375, USA; Neuroscience Training Program, University of Wisconsin-Madison, 9531 WIMR II, 1111 Highland Avenue, Madison, WI 53705, USA. Electronic address: [email protected].
PMID: 34755639
PMCID: PMC8671235 DOI: 10.1016/j.bbr.2021.113642
Abstract
Vocal deficits and anxiety are common, co-occurring, and interacting signs of Parkinson Disease (PD) that have a devastating impact on quality of life. Both manifest early in the disease process. Unlike hallmark motor signs of PD, neither respond adequately to dopamine replacement therapies, suggesting that their disease-specific mechanisms are at least partially extra-dopaminergic. Because noradrenergic dysfunction is also a defining feature of PD, especially early in the disease progression, drug therapies targeting norepinephrine are being trialed for treatment of motor and non-motor impairments in PD. Research assessing the effects of noradrenergic manipulation on anxiety and vocal impairment in PD, however, is sparse. In this pre-clinical study, we quantified the influence of pharmacologic manipulation of norepinephrine on vocal impairment and anxiety in Pink1-/- rats, a translational model of PD that demonstrates both vocal deficits and anxiety. Ultrasonic vocalization acoustics, anxiety behavior, and limb motor activity were tested twice for each rat: after injection of saline and after one of three drugs. We hypothesized that norepinephrine reuptake inhibitors (atomoxetine and reboxetine) and a β receptor antagonist (propranolol) would decrease vocal impairment and anxiety compared to saline, without affecting spontaneous motor activity. Our results demonstrated that atomoxetine and reboxetine decreased anxiety behavior. Atomoxetine also modulated ultrasonic vocalization acoustics, including an increase in vocal intensity, which is almost always reduced in animal models and patients with PD. Propranolol did not affect anxiety or vocalization. Drug condition did not influence spontaneous motor activity. These studies demonstrate relationships among vocal impairment, anxiety, and noradrenergic systems in the Pink1-/- rat model of PD.
Copyright © 2021 Elsevier B.V. All rights reserved.
Keywords: Parkinson Disease; Pink1; anxiety; norepinephrine; rat; ultrasonic vocalization
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