Cocaine exposure and gut microbiota (IMAGE) Cell Press Caption This photo represents Cuesta et al.'s demonstration that cocaine exposure increases norepinephrine in the gut facilitating γ-Proteobacteria colonization. This gut microbiota shift toward γ-Proteobacteria leads to a depletion of glycine from the host, which, in turn, facilitates cocaine-induced addiction-like behaviors in mice. Credit Florencia Cerchiara www.instagram.com/florecer.creative Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.