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Neuropsychopharmacology. 2019 Apr 30. doi: 10.1038/s41386-019-0403-y. [Epub ahead of print]

Quitting starts in the brain: a randomized controlled trial of app-based mindfulness shows decreases in neural responses to smoking cues that predict reductions in smoking.

Author information

1
McLean Imaging Center, McLean Hospital, Belmont, MA, 02478, USA.
2
Harvard Medical School, Boston, MA, 02115, USA.
3
Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, 149 Thirteenth St. #2301, Charlestown, MA, 02129, USA.
4
Center for Mindfulness and Compassion, Cambridge Health Alliance, 1035 Cambridge St. #21, Cambridge, MA, 02141, USA.
5
Mindfulness Center, Brown University School of Public Health and Warren Alpert School of Medicine, 121S Main St, Providence, RI, 02903, USA.
6
Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, 55 Lake Ave North, Worcester, MA, 01655, USA.
7
University of Oklahoma-Tulsa School of Community Medicine, Tulsa, OK, 74135, USA.
8
Mindfulness Center, Brown University School of Public Health and Warren Alpert School of Medicine, 121S Main St, Providence, RI, 02903, USA. judson_brewer@brown.edu.

Abstract

Current treatments for smoking yield suboptimal outcomes, partly because of an inability to reduce cue-induced smoking. Mindfulness training (MT) has shown preliminary efficacy for smoking cessation, yet its neurobiological target remains unknown. Our prior work with nonsmokers indicates that MT reduces posterior cingulate cortex (PCC) activity. In individuals who smoke, the PCC, consistently a main hub of the "default mode network," activates in response to smoking cues. In this randomized controlled trial, we tested the effects of app-delivered MT on PCC reactivity to smoking cues and whether individual differences in MT-mediated PCC changes predicted smoking outcomes. Smoking cue-induced PCC reactivity was measured using functional magnetic resonance imaging at baseline and 1 month after receiving smartphone app-based MT (n = 33) vs. an active control (National Cancer Institute's QuitGuide, n = 34). Whether individual differences in treatment-related changes in PCC activity predicted smoking behavior was assessed. The MT group demonstrated a significant correlation between a reduction in PCC reactivity to smoking cues and a decline in cigarette consumption (r = 0.39, p = 0.02). No association was found in the control group (r = 0.08, p = 0.65). No effects of group alone were found in PCC or cigarette reduction. Post hoc analysis revealed this association is sex specific (women, r = 0.49, p = 0.03; men: r = -0.08, p = 0.79). This initial report indicates that MT specifically reduces smoking cue-induced PCC activity in a subject-specific manner, and the reduction in PCC activity predicts a concurrent decline in smoking. These findings link the hypothesized behavioral effects of MT for smoking to neural mechanisms particularly in women. This lays the groundwork for identifying individuals who may benefit from targeted digital therapeutic treatments such as smartphone-based MT, yielding improved clinical outcomes.

PMID:
31039580
DOI:
10.1038/s41386-019-0403-y

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