Brain processes of reward and decision making: stress and drug effects

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About the project

Figure showing two brain processes, one for relief and one for reward.
Figure showing brain processes of reward and decision making: stress and drug effects.

In this project, we hypothesise that addictive drugs have different mechanisms of action depending on how one is feeling before taking the drug. Negative feelings and a wish for relief could underpin the increased risk of addiction observed in people suffering from depression, anxiety, a history of childhood trauma, and poor social support networks. We also investigate the role of the endogenous opioid system (which uses for instance endorphins as signal transmitters) in stress responses and their modulation.

Outcomes

The research results are expected to shed light on how distress enhances vulnerability to opioid addiction, and whether protective individual and environmental factors buffer stress responses through the endogenous opioid system.

Background

Despite the tremendous resources invested in uncovering the mechanisms of substance abuse, overdose tolls are increasing worldwide. These tragic deaths are mainly attributable to opioid drugs such as heroin and prescription analgesics. The canonical view that pain protects against the addictive properties of opioids has finally been abandoned. Yet we are still a long way from understanding the processes that make opioid drugs so addictive.

Funding

European Research Counsil

Funded by the European Union (ERC, 802885). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council Executive Agency. Neither the European Union nor the granting authority can be held responsible for them.

The project is funded by European Research Council under the European Union’s Horizon 2020 research and innovation program.

Collaborators

In addition to the UiO based core team, the Project Group includes partners from Oslo University Hospital, Kongsberg Hospital, Linköping University in Sweden and Swinburn University in Australia.

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Published Feb. 27, 2025 3:37 PM - Last modified Feb. 27, 2025 3:50 PM