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Spontaneous thought-related network connectivity predicts sertraline effect on major depressive disorder

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Abstract

Sertraline is one of the most commonly prescribed antidepressants. Major depressive disorder (MDD) is characterized by spontaneous thoughts that are laden with negative affect—a “malignant sadness”. Prior neuroimaging studies have identified abnormal resting-state functional connectivity (rsFC) in the spontaneous brain networks of MDD patients. But how antidepressant medication acts to relieve the experience of depression as well as adjust its associated spontaneous networks and mood-regulation circuits remains an open question. In this study, we recruited 22 drug-naïve MDD patients along with 35 normal controls and investigated whether the functional integrity of cortical networks associated with spontaneous thoughts is modulated by sertraline treatment. We attempted to predict post-treatment effects based upon what we observed in the pre-treatment rsFC of drug-naïve MDD patients. In the result, we demonstrated that (1) after the sertraline treatment, the medial temporal lobe of default network (DNMTL) and mood regulation pathway—the fronto-parietal control network (FPCN), the thalamus, and the salience network (SN)—were restored to normal connectivity, relative to the pre-treatment condition; however, the altered connections of FPCN-core DN (DNCORE), FPCN-SN, and intra-FPCN among MDD patients remained impaired; (2) thalamo-prefrontal connectivity provides moderate predictive power (r2 = 0.63) for the effectiveness of sertraline treatment. In summary, our findings contribute to a body of evidence that suggests salubrious effects of sertraline treatment primarily involve the FPCN-thalamus-SN pathway. The pre-treatment rsFC in this pathway could serve as a predictor of sertraline treatment outcome.

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Funding

This research was supported by National Science Council, Taiwan (NSC 102-2314-B-016-057) and Ministry of Science and Technology, Taiwan (MOST 108-2321-B-038-005-MY2, MOST 106-2420-H-038-005-MY2, MOST 106-2410-H-038-003, MOST 106-2632-H-038-001-MY3, MOST 104-2420-H-038-001-MY3, MOST 105-2632-H-038-001-MY3).

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Correspondence to Chi-Bin Yeh or Hung-Wen Kao.

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Li-Ming Hsu declares that he has no conflict of interest. Timothy J. Lane declares that he has no conflict of interest. Changwei W. Wu declares that he has no conflict of interest. Chien-Yuan Lin declares that he has no conflict of interest. Chi-Bin Yeh declares that he has no conflict of interest. Hung-Wen Kao declares that he has no conflict of interest. Ching-Po Lin declares that he has no conflict of interest.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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Hsu, LM., Lane, T.J., Wu, C.W. et al. Spontaneous thought-related network connectivity predicts sertraline effect on major depressive disorder. Brain Imaging and Behavior 15, 1705–1717 (2021). https://doi.org/10.1007/s11682-020-00364-w

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