Adequate BDNF Helps Stop Addiction

Byron's Comments:

BDNF to the rescue.

Study Title:

Brain-derived neurotrophic factor and addiction.

Study Abstract:

The effects of brain-derived neurotrophic factor (BDNF) on cocaine-seeking are brain region-specific. Infusion of BDNF into subcortical structures, like the nucleus accumbens and ventral tegmental area, enhances cocaine-induced behavioral sensitization and cocaine-seeking. Conversely, repeated administration of BDNF antiserum into the nucleus accumbens during chronic cocaine self-administration attenuates cocaine-induced reinstatement. In contrast, BDNF infusion into the dorsomedial prefrontal cortex immediately following a final session of cocaine self-administration attenuates relapse to cocaine-seeking after abstinence, as well as cue- and cocaine prime-induced reinstatement of cocaine-seeking following extinction. BDNF-induced alterations in the ERK-MAP kinase cascade and in prefronto-accumbens glutamatergic transmission are implicated in BDNF’s ability to alter cocaine-seeking. Within 22 hours after infusion into the prefrontal cortex, BDNF increases BDNF protein in prefrontal cortical targets, including nucleus accumbens, and restores cocaine-mediated decreases in phospho-ERK expression in the nucleus accumbens. Furthermore, 3 weeks after BDNF infusion in animals with a cocaine self-administration history, suppressed basal levels of glutamate are normalized and a cocaine prime-induced increase in extracellular glutamate levels in the nucleus accumbens is prevented. Thus, BDNF may have local effects at the site of infusion and distal effects in target areas that are critical to mediating or preventing cocaine-induced dysfunctional neuroadaptations.

Study Information:

McGinty JF, Whitfield TW Jr, Berglind WJ. Brain-derived neurotrophic factor and addiction. Brain Res. 2009 September 
Department of Neurosciences, Medical University of South Carolina, 173 Ashley Ave MSC 510, Charleston, SC 29425, USA.




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