MGH McLean Adult Psychiatry Residency Program

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A gene essential for normal brain development, and also linked to autism spectrum disorders, plays a critical role in addiction-related behaviors, according to Harvard Medical School investigators at McLean Hospital.

“Chronic exposure to drugs of abuse causes changes in the brain that could underlie the transition from casual drug use to addiction. By discovering the brain molecules that control the development of drug addiction, we hope to identify new treatment approaches,” Cowan said.

The Cowan lab team, led by Laura Smith, HMS research fellow in psychiatry at McLean, used animal models to show that the fragile X mental retardation protein, or FMRP, plays a critical role in the development of addiction-related behaviors.

[The findings were published in the latest issue of the neuroscience journal Neuron. (more…)

Harvard researcher David Ludwig has linked low blood glucose levels with high activation of the nucleus accumbens, a brain region specifically involved in reward and craving, known addictive behaviors. Using fMRI analysis, his team found that the glycemic load of foods, not caloric intake, significantly alters brain function, promoting hunger and overeating, behaviors related to substance abuse and dependence.