Psychopharmacology (Berl)
May 22, 2026
Wei-Chen Lin, Li-Kai Cheng, Tung-Ping Su et al.
Shorter to be effective: subanesthetic-dose ketamine infusion reduces the global and regional path length of brain functional connectivity in patients with treatment-resistant depression and suicidal ideation.
Scientific Reports
May 20, 2026
Guan-Jie She, Wei-Chi Li, Chun-Hsiang Chou et al.
Emerging evidence shows that ketamine, an N-methyl-D-aspartate (NMDA) receptor antagonist, can produce rapid anti-suicidal effects in treatment-resistant depression, yet its underlying neuropharmacological mechanisms remain elusive. The present study aimed at investigating the therapeutic effect of ketamine infusion on suicidal ideation by examining hemodynamic response changes in resting-state...
Pharmacopsychiatry
February 26, 2026
Ping-Chung Wu, Wei-Chen Lin, Tung-Ping Su et al.
As accumulating evidence suggests the antisuicidal properties of ketamine, elucidating its underlying mechanisms and predictors of treatment response has become crucial. Whether a combination of clinical markers can enhance the prediction of the antisuicidal response to ketamine remains unclear.Using data from our previous randomized placebo-controlled and open-label trials, this post hoc...
The British journal of psychiatry : the journal of mental science
April 2, 2025
Wei-Chen Lin, Li-Kai Cheng, Tung-Ping Su et al.
2 citations
Evidence suggests the crucial role of dysfunctional default mode (DMN), salience and frontoparietal (FPN) networks, collectively termed the triple network model, in the pathophysiology of treatment-resistant depression (TRD). Using the graph theory- and seed-based functional connectivity analyses, we attempted to elucidate the role of low-dose ketamine in the triple networks, namely the DMN,...
Journal of psychopharmacology (Oxford, England)
March 24, 2025
Chung-Feng Kao, Shih-Jen Tsai, Tung-Ping Su et al.
1 citation
Low-dose ketamine is an N-methyl-D-aspartate receptor antagonist that exerts an antidepressant effect on patients with treatment-resistant depression (TRD). This antidepressant effect may extend beyond the glutamatergic hypothesis. Nevertheless, the roles of genes encoding other monoamine neurotransmitters (i.e., serotonin and dopamine) in the neuromechanism of low-dose ketamine remain unknown....
Psychiatry Research
March 1, 2025
Tung-Ping Su, Li-Kai Cheng, Pei-Chi Tu et al.
6 citations
Ketamine is a dissociative drug used for the treatment of depression. However, the neurofunctional mechanism underlying the antidepressant effect of ketamine remains unknown. According to previous research, low-dose ketamine affects large-scale brain networks, including default-mode and salient networks. A total of 43 patients with treatment-resistant depression (TRD) and suicidal ideation (SI)...
Molecular Psychiatry
2025
Pei-Chi Tu, Wan-Chen Chang, Tung-Ping Su et al.
13 citations
Previous studies have shown an association between the thalamocortical dysconnectivity and treatment-resistant depression (TRD). Whether a single subanesthetic dose of ketamine may change thalamocortical connectivity among patients with TRD is unclear. Whether these changes in thalamocortical connectivity is associated with the antidepressant and antisuicidal effects of ketamine treatment is...
Pharmacopsychiatry
December 20, 2024
Mu-Hong Chen, Tung-Ping Su, Wei-Chen Lin et al.
1 citation
Low-grade inflammation (LGI) contributes to resistance against traditional antidepressants. However, whether the antidepressant and antisuicidal effects of ketamine on patients with treatment-resistant depression (TRD) differ between those with LGI and those without LGI remains unknown.This study included 167 patients with TRD, among whom 46 had LGI and 121 did not have LGI. The patients...
The Journal of Clinical Psychiatry
July 8, 2024
Wei-Chen Lin, Mu-Hong Chen, Tung-Ping Su et al.
4 citations
Background: Low-dose ketamine infusion has been demonstrated to exert antisuicidal effects on patients with treatment-resistant depression (TRD) and strong suicidal ideation. Although evidence suggests an association between hopelessness and suicidality, very few studies have investigated the antihopelessness effects of ketamine. Methods: This study included 84 patients with TRD and strong...
Progress in Brain Research
2023
Mu-Hong Chen, Pei-Chi Tu, Tung-Ping Su
3 citations
Evidence has suggested that the modulation of N-methyl-d-aspartate receptors (NMDARs) and 5-hydroxytryptamine receptors (5-HTRs) via the psychedelic drugs, such as ketamine and psilocybin, rapidly alters the state of consciousness and the neuroplasticity. The United State Food and Drug Administration approved the indications of esketamine for treatment-resistant depression (TRD) in 2019 and...
The International Journal of Neuropsychopharmacology
December 29, 2020
Mu-Hong Chen, Wan-Chen Chang, Wei-Chen Lin et al.
28 citations
Frontostriatal disconnectivity plays a crucial role in the pathophysiology of major depressive disorder. However, whether the baseline functional connectivity of the frontostriatal network could predict the treatment outcome of low-dose ketamine infusion remains unknown. In total, 48 patients with treatment-resistant depression were randomly divided into 3 treatment groups (a single-dose...
Journal of Affective Disorders
December 1, 2019
Mu-Hong Chen, Wei-Chen Lin, Pei-Chi Tu et al.
Increasing evidence suggests that infusion of a subanesthetic dose of ketamine exerts antidepressant and antisuicidal effects in patients with treatment-resistant depression (TRD). In this investigation, we used the resting functional connectivity magnetic resonance imaging (fcMRI) to determine the effects of ketamine on the functional connectivity (FC) of prefrontal cortex (PFC)-related...