Neuronal network of panic disorder: the role of the neuropeptide cholecystokinin

Depression and Anxiety
P ZwanzgerJ Bradwejn

Abstract

Panic disorder (PD) is characterized by panic attacks, anticipatory anxiety and avoidance behavior. Its pathogenesis is complex and includes both neurobiological and psychological factors. With regard to neurobiological underpinnings, anxiety in humans seems to be mediated through a neuronal network, which involves several distinct brain regions, neuronal circuits and projections as well as neurotransmitters. A large body of evidence suggests that the neuropeptide cholecystokinin (CCK) might be an important modulator of this neuronal network. Key regions of the fear network, such as amygdala, hypothalamus, peraqueductal grey, or cortical regions seem to be connected by CCKergic pathways. CCK interacts with several anxiety-relevant neurotransmitters such as the serotonergic, GABA-ergic and noradrenergic system as well as with endocannabinoids, NPY and NPS. In humans, administration of CCK-4 reliably provokes panic attacks, which can be blocked by antipanic medication. Also, there is some support for a role of the CCK system in the genetic pathomechanism of PD with particularly strong evidence for the CCK gene itself and the CCK-2R (CCKBR) gene. Thus, it is hypothesized that genetic variants in the CCK system might contribute to ...Continue Reading

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Citations

Mar 7, 2013·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Peter ZwanzgerBettina Pfleiderer
Apr 12, 2013·Proceedings of the National Academy of Sciences of the United States of America·Anu JosephYa-Ping Tang
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