#  Study published by current Junior Fellow investigates how dopamine–serotonin interactions shape reward-related behavior 

 





March 15, 2026

 

 

A new study by Daniel Cardozo Pinto, a biologist and current Junior Fellow, has uncovered a neural circuit mechanism explaining how two key brain chemicals—dopamine and serotonin—work in opposition to regulate reward learning. The work, published in [*Nature Communications*](https://www.nature.com/articles/s41467-026-70519-8) and conducted during Cardozo Pinto’s time at Stanford University, identifies a neural pathway in the brain’s reward circuitry by which the two neuromodulators exert opposing effects on behavior.

Read more about the study [here](https://www.mcb.harvard.edu/department/news/study-reveals-neural-circuit-behind-the-brains-dopamine-serotonin-gas-brake-system-for-reward/).



 

 

 



 

 

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