Exploring the Role of the Ser9Gly (rs6280) Dopamine D3 Receptor Polymorphism in Nicotine Reinforcement and Cue-elicited Craving
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Preclinical studies show that the dopamine D3 receptor (D3R) is involved in the reinstatement of drug seeking and motivation for drugs of abuse. A D3R gene variant, Ser9Gly (rs6280) has been linked to nicotine dependence, yet the mechanisms underlying its involvement in nicotine dependence is unclear. This study investigated the relationship between the Ser9Gly variant and measures of both nicotine reinforcement and cue-elicited craving. Phenotypes of smoking behaviors were assessed in genetically grouped (Glycine vs. No Glycine carriers) current smokers (n = 104, ≥ 10 cigarettes per day). Laboratory measures included a forced choice session (to measure reinforcement of nicotine containing vs. denicotinized cigarettes), and a cue-reactivity session (to measure smoking cues vs. neutral cues elicited craving). The forced choice procedure revealed that subjective ratings were significantly higher in response to nicotinized compared to denicotinized cigarettes; however the Ser9Gly variant did not influence this effect. By comparison, smoking cues elicited greater craving over time compared to neutral cues, and Glycine carriers of the Ser9Gly D3R variant seem to experience a significant blunted cue-elicited craving effect. Results support D3R involvement in nicotine cue reactivity. However, more research is needed to reveal how this gene variant modulates various aspects of nicotine dependence.
Xie J, Zhuang W, Zhu Y, Zheng Z, Huang Y, Ma S Ital J Pediatr. 2024; 50(1):225.
PMID: 39468580 PMC: 11520374. DOI: 10.1186/s13052-024-01776-w.
Xu L, Zhang J, Yang H, Cao C, Fang R, Liu P Front Psychiatry. 2024; 15:1257911.
PMID: 38487579 PMC: 10937445. DOI: 10.3389/fpsyt.2024.1257911.
Han P, Jing X, Han S, Wang X, Li Q, Zhang Y Front Neurosci. 2023; 17:1288102.
PMID: 38033549 PMC: 10687399. DOI: 10.3389/fnins.2023.1288102.
Del Casale A, Paolini M, Gentile G, Borro M, Zocchi C, Fiasche F J Pers Med. 2022; 12(4).
PMID: 35455685 PMC: 9033085. DOI: 10.3390/jpm12040565.
Le Foll B, Piper M, Fowler C, Tonstad S, Bierut L, Lu L Nat Rev Dis Primers. 2022; 8(1):19.
PMID: 35332148 DOI: 10.1038/s41572-022-00346-w.