Global prefrontal and fronto-amygdala dysconnectivity in bipolar i disorder with psychosis history

Alan Anticevic, Margaret S. Brumbaugh, Anderson M. Winkler, Lauren E. Lombardo, Jennifer Barrett, Phillip R. Corlett, Hedy Kober, June Gruber, Grega Repovs, Michael W. Cole, John H. Krystal, Godfrey D. Pearlson, David C. Glahn

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Background: Pathophysiological models of bipolar disorder postulate that mood dysregulation arises from fronto-limbic dysfunction, marked by reduced prefrontal cortex (PFC) inhibitory control. This might occur due to both disruptions within PFC networks and abnormal inhibition over subcortical structures involved in emotional processing. However, no study has examined global PFC dysconnectivity in bipolar disorder and tested whether regions with within-PFC dysconnectivity also exhibit fronto-limbic connectivity deficits. Furthermore, no study has investigated whether such connectivity disruptions differ for bipolar patients with psychosis history, who might exhibit a more severe clinical course. Methods: We collected resting-state functional magnetic resonance imaging at 3 T in 68 remitted bipolar I patients (34 with psychosis history) and 51 demographically matched healthy participants. We employed a recently developed global brain connectivity method, restricted to PFC (rGBC). We also independently tested connectivity between anatomically defined amygdala and PFC. Results: Bipolar patients exhibited reduced medial prefrontal cortex (mPFC) rGBC, increased amygdala-mPFC connectivity, and reduced connectivity between amygdala and dorsolateral PFC. All effects were driven by psychosis history. Moreover, the magnitude of observed effects was significantly associated with lifetime psychotic symptom severity. Conclusions: This convergence between rGBC, seed-based amygdala findings, and symptom severity analyses highlights that mPFC, a core emotion regulation region, exhibits both within-PFC dysconnectivity and connectivity abnormalities with limbic structures in bipolar illness. Furthermore, lateral PFC dysconnectivity in patients with psychosis history converges with published work in schizophrenia, indicating possible shared risk factors. Observed dysconnectivity in remitted patients suggests a bipolar trait characteristic and might constitute a risk factor for phasic features of the disorder.

    Original languageEnglish (US)
    Pages (from-to)565-573
    Number of pages9
    JournalBiological psychiatry
    Volume73
    Issue number6
    DOIs
    StatePublished - Mar 15 2013

    Keywords

    • Amygdala
    • bipolar disorder
    • connectivity
    • prefrontal cortex
    • psychosis
    • resting-state

    ASJC Scopus subject areas

    • Biological Psychiatry

    Fingerprint Dive into the research topics of 'Global prefrontal and fronto-amygdala dysconnectivity in bipolar i disorder with psychosis history'. Together they form a unique fingerprint.

    Cite this