NOT-DA-20-046: Notice of Special Interest (NOSI): Neuroimmune Signaling and Function in Substance Use Disorders - 0 views
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MiamiOH OARS on 13 Apr 20Repeated exposure to drugs of abuse can cause changes in neuronal structure and function that contribute to and sustain drug use. Research has largely focused on the interactions of drugs with specific neuronal targets, and on the consequences of drug exposure on neuronal function, excitability, neuroplasticity, and neurochemistry. However, emerging evidence shows that neuroimmune factors, released from both glia or neurons, can modulate neuronal structure and function, either by affecting neuron-glia interactions or through direct effects on neurons. Yet the role of neuroimmune signaling in the modulation of neuronal function as it affects the expression of substance use behaviors is poorly understood. Research has shown that drugs of abuse, including methamphetamine, morphine, cocaine and nicotine, can elicit neuroinflammatory responses. Stress, an important contributor to relapse, can also elicit neuroimmune responses. Consequently, neuroimmune signaling may be integral to mechanisms underlying drug misuse, addiction, and other consequences of repeated drug use. Further, because the molecular targets and receptors for abused substances differ, the complement of neuroimmune factors affected by exposure to a particular drug may be drug-specific. Research to identify the commonalities between specific drugs of abuse, the neuroimmune factors released by drug use, and the neuroanatomical specificity of the responses is needed. It is expected that the contributing actions of neuroimmune signaling to addictive behaviors are most likely due not to obvious brain damage and overt pathology, but to the consequences of such signaling in altering specific molecular and cellular processes within glia, neurons, and neural circuits.