Orexin/hypocretin (Orx/Hcrt) transmission and drug-seeking behavior: Is the paraventricular nucleus of the thalamus (PVT) part of the drug seeking circuitry?
The orexin/hypocretin (Orx/Hcrt) system has long been considered to regulate a wide range of physiological processes, including feeding, energy metabolism, and arousal. More recently, concordant observations have demonstrated an important role for these peptides in the reinforcing properties of most...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2012-11-01
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| Series: | Frontiers in Behavioral Neuroscience |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fnbeh.2012.00075/full |
| _version_ | 1818007154937823232 |
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| author | Remi eMartin-Fardon Benjamin eBoutrel |
| author_facet | Remi eMartin-Fardon Benjamin eBoutrel |
| author_sort | Remi eMartin-Fardon |
| collection | DOAJ |
| description | The orexin/hypocretin (Orx/Hcrt) system has long been considered to regulate a wide range of physiological processes, including feeding, energy metabolism, and arousal. More recently, concordant observations have demonstrated an important role for these peptides in the reinforcing properties of most drugs of abuse. Orx/Hcrt neurons arise in the lateral hypothalamus (LH) and project to all brain structures implicated in the regulation of arousal, stress, and reward. Although Orx/Hcrt neurons have been shown to massively project to the paraventricular nucleus of the thalamus (PVT), only recent evidence suggested that the PVT may be a key relay of Orx/Hcrt-coded reward-related communication between the LH and both the ventral and dorsal striatum. While this thalamic region was not thought to be part of the drug addiction circuitry, an increasing amount of evidence demonstrated that the PVT—particularly PVT Orx/Hcrt transmission—was implicated in the modulation of reward function in general and several aspects of drug-directed behaviors in particular. The present review discusses recent findings that suggest that maladaptive recruitment of PVT Orx/Hcrt signaling by drugs of abuse may promote persistent compulsive drug-seeking behavior following a period of protracted abstinence and as such may represent a relevant target for understanding the long-term vulnerability to drug relapse after withdrawal. |
| first_indexed | 2024-04-14T05:11:59Z |
| format | Article |
| id | doaj.art-bdfc28c055864092be47008008c95875 |
| institution | Directory Open Access Journal |
| issn | 1662-5153 |
| language | English |
| last_indexed | 2024-04-14T05:11:59Z |
| publishDate | 2012-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Behavioral Neuroscience |
| spelling | doaj.art-bdfc28c055864092be47008008c958752022-12-22T02:10:31ZengFrontiers Media S.A.Frontiers in Behavioral Neuroscience1662-51532012-11-01610.3389/fnbeh.2012.0007534433Orexin/hypocretin (Orx/Hcrt) transmission and drug-seeking behavior: Is the paraventricular nucleus of the thalamus (PVT) part of the drug seeking circuitry?Remi eMartin-Fardon0Benjamin eBoutrel1The Scripps Research InstituteLausanne University HospitalThe orexin/hypocretin (Orx/Hcrt) system has long been considered to regulate a wide range of physiological processes, including feeding, energy metabolism, and arousal. More recently, concordant observations have demonstrated an important role for these peptides in the reinforcing properties of most drugs of abuse. Orx/Hcrt neurons arise in the lateral hypothalamus (LH) and project to all brain structures implicated in the regulation of arousal, stress, and reward. Although Orx/Hcrt neurons have been shown to massively project to the paraventricular nucleus of the thalamus (PVT), only recent evidence suggested that the PVT may be a key relay of Orx/Hcrt-coded reward-related communication between the LH and both the ventral and dorsal striatum. While this thalamic region was not thought to be part of the drug addiction circuitry, an increasing amount of evidence demonstrated that the PVT—particularly PVT Orx/Hcrt transmission—was implicated in the modulation of reward function in general and several aspects of drug-directed behaviors in particular. The present review discusses recent findings that suggest that maladaptive recruitment of PVT Orx/Hcrt signaling by drugs of abuse may promote persistent compulsive drug-seeking behavior following a period of protracted abstinence and as such may represent a relevant target for understanding the long-term vulnerability to drug relapse after withdrawal.http://journal.frontiersin.org/Journal/10.3389/fnbeh.2012.00075/fullDrug-Seeking Behaviorhypocretinorexinparaventricular nucleus of the thalamusnatural reward. |
| spellingShingle | Remi eMartin-Fardon Benjamin eBoutrel Orexin/hypocretin (Orx/Hcrt) transmission and drug-seeking behavior: Is the paraventricular nucleus of the thalamus (PVT) part of the drug seeking circuitry? Frontiers in Behavioral Neuroscience Drug-Seeking Behavior hypocretin orexin paraventricular nucleus of the thalamus natural reward. |
| title | Orexin/hypocretin (Orx/Hcrt) transmission and drug-seeking behavior: Is the paraventricular nucleus of the thalamus (PVT) part of the drug seeking circuitry? |
| title_full | Orexin/hypocretin (Orx/Hcrt) transmission and drug-seeking behavior: Is the paraventricular nucleus of the thalamus (PVT) part of the drug seeking circuitry? |
| title_fullStr | Orexin/hypocretin (Orx/Hcrt) transmission and drug-seeking behavior: Is the paraventricular nucleus of the thalamus (PVT) part of the drug seeking circuitry? |
| title_full_unstemmed | Orexin/hypocretin (Orx/Hcrt) transmission and drug-seeking behavior: Is the paraventricular nucleus of the thalamus (PVT) part of the drug seeking circuitry? |
| title_short | Orexin/hypocretin (Orx/Hcrt) transmission and drug-seeking behavior: Is the paraventricular nucleus of the thalamus (PVT) part of the drug seeking circuitry? |
| title_sort | orexin hypocretin orx hcrt transmission and drug seeking behavior is the paraventricular nucleus of the thalamus pvt part of the drug seeking circuitry |
| topic | Drug-Seeking Behavior hypocretin orexin paraventricular nucleus of the thalamus natural reward. |
| url | http://journal.frontiersin.org/Journal/10.3389/fnbeh.2012.00075/full |
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