Disclosed are methods and compositions comprising fibroblasts and/or products derived thereof for the inhibition and/or treatment of addiction of any kind, such as opioid addiction. In some embodiments, methods comprise treating a patient addicted to opioids by administering a fibroblast population at a concentration sufficient for suppression of addiction-associated brain damage. In some embodiments, the fibroblasts express CD31 and/or CD73 markers. In some embodiments, fibroblasts are used to endow neuronal regeneration in order to overcome changes in the brain associated with addiction. Some embodiments relate to the stimulation of hippocampal regeneration subsequent to addiction induced damage.
