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Cingulum and abnormal psychological stress response in schizophrenia

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Abstract

Stress is implicated in many aspects of schizophrenia, including heightened distress intolerance. We examined how affect and microstructure of major brain tracts involved in regulating affect may contribute to distress intolerance in schizophrenia. Patients with schizophrenia spectrum disorders (n = 78) and community controls (n = 95) completed diffusion weighted imaging and performed psychological stress tasks. Subjective affect was collected pre and post stressors. Individuals who did not persist during one or both stress tasks were considered distress intolerant (DI), and otherwise distress tolerant (DT). Fractional anisotropy (FA) of the dorsal cingulum showed a significant diagnosis x DT/DI phenotype interaction (p = 0.003). Post-hoc tests showed dorsal cingulum FA was significantly lower in DI patients compared with DI controls (p < 0.001), but not different between DT groups (p = 0.27). Regarding affect responses to stress, irritability showed the largest stress-related change (p < 0.001), but irritability changes were significantly reduced in DI patients compared to DI controls (p = 0.006). The relationship between irritability change and performance errors also differed among patients (ρ = −0.29, p = 0.011) and controls (ρ = 0.21, p = 0.042). Further modeling highlighted the explanatory power of dorsal cingulum for predicting DI even after performance and irritability were taken into account. Distress intolerance during psychological stress exposure is related to microstructural properties of the dorsal cingulum, a key structure for cognitive control and emotion regulation. In schizophrenia, the affective response to psychological stressors is abnormal, and distress intolerant patients had significantly reduced dorsal cingulum FA compared to distress intolerant controls. The findings provide new insight regarding distress intolerance in schizophrenia.

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Abbreviations

DI:

distress intolerant

DT:

distress tolerant

BPRS:

Brief Psychiatric Rating Scale

BNSS:

Brief Negative Symptom Scale

CPZ:

chlorpromazine equivalents

PASAT:

Paced Auditory Serial Addition Task

MTPT:

Mirror-Tracing Persistence Task

PANAS:

Positive and Negative Affect Schedule

DWI:

diffusion weighted imaging

FA:

fractional anisotropy

RD:

radial diffusivity

AD:

axial diffusivity

dcg:

dorsal cingulum

vcg:

ventral cingulum

fx:

fornix

unc:

uncinate fasciculus

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Funding

Support was received from National Institutes of Health grants MH112180, MH103222, MH108148, MH067533, a State of Maryland contract (M00B6400091), and a National Alliance for Research in Schizophrenia and Affective Disorders (NARSAD) Award from the Brain and Behavior Research Foundation.

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Correspondence to Krista M. Wisner.

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Conflict of interest

Dr. Hong has received or is planning to receive research funding or consulting fees from Mitsubishi, Your Energy Systems LLC, Neuralstem, Taisho Pharmaceutical, Heptares, Pfizer, Takeda and Regeneron. All other authors declare no financial interests that could represent a conflict of interest.

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All procedures were in accordance with the ethnical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinksi Declaration of 1975, and the applicable revisions at the time of the investigation. Informed consent was obtained from all participants included in the study.

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Supplemental Figure 1

Voxel-wise differences in factional anisotropy between patients and controls along the entire white matter skeleton; widespread reductions in FA were observed in patients relative to controls. (PDF 511 kb)

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Wisner, K.M., Chiappelli, J., Savransky, A. et al. Cingulum and abnormal psychological stress response in schizophrenia. Brain Imaging and Behavior 14, 548–561 (2020). https://doi.org/10.1007/s11682-019-00120-9

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  • DOI: https://doi.org/10.1007/s11682-019-00120-9

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