期刊
FRONTIERS IN PSYCHIATRY
卷 13, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fpsyt.2022.859123
关键词
serotonin receptor 4; functional neuroimaging (fMRI); emotional processing; cognition; antidepressant
类别
资金
- Wellcome Trust Clinical Doctoral Research Fellowship [216430/Z/19/Z]
- Royal College of Psychiatrists/Gatsby Foundation
- NIHR Oxford Health Biomedical Research Centre
- Wellcome Centre for Integrative Neuroscience (WIN) [203139/Z/16/Z]
- Wellcome Trust [203139/Z/16/Z] Funding Source: Wellcome Trust
Depression is a prevalent illness with global impact. Current antidepressants are ineffective for a significant portion of patients, and 5-HT4 receptor agonists show potential in animal models and cognitive deficits. This study found that the 5-HT4 partial agonist prucalopride improved accuracy in identifying emotional faces in healthy participants, and inhibited activation in regions corresponding to the default mode network. However, there was no evidence of a positive bias in the neural processing of emotional faces with prucalopride treatment.
Depression is a common and often recurrent illness with significant negative impact on a global scale. Current antidepressants are ineffective for up to one third of people with depression, many of whom experience persistent symptomatology. 5-HT4 receptor agonists show promise in both animal models of depression and cognitive deficit. We therefore studied the effect of the 5-HT4 partial agonist prucalopride (1 mg daily for 6 days) on the neural processing of emotional faces in 43 healthy participants using a randomised placebo-controlled design. Participants receiving prucalopride were more accurate at identifying the gender of emotional faces. In whole brain analyses, prucalopride was also associated with reduced activation in a network of regions corresponding to the default mode network. However, there was no evidence that prucalopride treatment produced a positive bias in the neural processing of emotional faces. Our study provides further support for a pro-cognitive effect of 5-HT4 receptor agonism in humans. While our current behavioural and neural investigations do not suggest an antidepressant-like profile of prucalopride in humans, it will be important to study a wider dose range in future studies.
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