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Intrinsic differences in insular circuits moderate nicotine dependent reductions in cingulate-striatal connectivity strength.

07:00 EST 13th February 2020 | BioPortfolio

Summary of "Intrinsic differences in insular circuits moderate nicotine dependent reductions in cingulate-striatal connectivity strength."

The development of brain-based biomarkers to assess nicotine dependence severity and treatment efficacy are essential to improve the current marginally effective treatment outcomes. Cross-sectional resting state functional connectivity (rsFC) studies in humans identified a circuit between the dorsal anterior cingulate cortex and the ventral striatum that negatively correlated with increased nicotine dependence severity but was unaffected by acute nicotine administration, suggesting a trait marker of addiction. However, whether this trait circuit dysregulation is predispositional to or resultant from nicotine dependence is unclear. Using a rat model of nicotine dependence with longitudinal fMRI measurements, we assessed the relationship between ACC-striatal rsFC and nicotine dependence severity. Data-driven modularity-based parcellation of the rat medial prefrontal cortex (mPFC) combined with seed-based connectivity analysis with the striatum recapitulated the cingulate-striatum relationship observed in humans. Furthermore, the relationship between cingulate-striatal brain circuits and nicotine dependence severity as indexed by the intensity of precipitated withdrawal, was fully statistically moderated by a predispositional insular-frontal cortical functional circuit. These data suggest that the identified trans-species ACC-striatal circuit relationship with nicotine dependence severity is dysregulated following chronic nicotine administration-induced dependence and may be biased by individual differences in predispositional insula-based striatal-frontal circuits, highlighting the circuit's potential as a biomarker of dependence severity.

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This article was published in the following journal.

Name: Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology
ISSN: 1740-634X
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Medical and Biotech [MESH] Definitions

Nicotine is highly toxic alkaloid. It is the prototypical agonist at nicotinic cholinergic receptors where it dramatically stimulates neurons and ultimately blocks synaptic transmission. Nicotine is also important medically because of its presence in tobacco smoke.

For-profit enterprise with relatively few to moderate number of employees and low to moderate volume of sales.

Chewing gum which contains NICOTINE.

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Reductions in all or any portion of the costs of providing goods or services. Savings may be incurred by the provider or the consumer.

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