Nitrous Oxide Reward Driven by DCN-VTA Circuit, AMPA Receptor Potentiation

Substance use disorders present a persistent global health challenge, marked by compulsive drug-seeking behaviors and high relapse rates [1]. While clinical attention often focuses on opioids and stimulants, the misuse of non-opioid anesthetics like nitrous oxide (N2O) is a growing concern, particularly among adolescents and healthcare professionals [2, 3, 4]. Nitrous oxide, valued in clinical practice for its analgesic and anesthetic properties, is also sought recreationally for its euphoric effects [5, 4]. Despite its widespread availability, the precise neurobiological mechanisms that confer its rewarding properties and addictive potential have remained poorly defined [2, 4]. A recent study in an animal model provides new clarity on the specific brain circuits and molecular actions that drive the rewarding effects of N2O.