University of Toronto, University Health Network
130 papers in the library · 4,810 citations · publishing 0-2026
Expert Opinion on Drug Safety August 28, 2023 Roger S McIntyre 16 citations
KEYWORDS: Psychedelicpsilocybinlysergic acid diethylamidemood disordersantidepressantsdiscoverypharmacologyFDA
Expert Opinion on Drug Safety August 15, 2023 Roger S McIntyre 26 citations
KEYWORDS: PsilocybinLysergic acid diethylamide (LSD)ecstasyvalvular heart disease5HT2B receptor agonismFDA guidance
Psychiatry Research July 29, 2023 Mauro Pettorruso, Roberto Guidotti, Giacomo D’andrea et al. 56 citations
Treatment-resistant depression (TRD) represents a severe clinical condition with high social and economic costs. Esketamine Nasal Spray (ESK-NS) has recently been approved for TRD by EMA and FDA, but data about predictors of response are still lacking. Thus, a tool that can predict the individual patients' probability of response to ESK-NS is needed. This study investigates sociodemographic and...
American Journal of Geriatric Psychiatry July 8, 2023 Giacomo D’andrea, Stefania Chiappini, Roger S McIntyre et al. 36 citations
INTRODUCTION: Treatment-resistant depression (TRD) is a serious and debilitating psychiatric disorder that frequently affects older patients. Esketamine nasal spray (ESK-NS) has recently been approved as a treatment for TRD, with multiple studies establishing its efficacy and tolerability. However, the real-world effectiveness, tolerability, and safety of this treatment in older adults is still...
Frontiers in Psychiatry June 30, 2023 Colleen E. Charlton, Povilas Karvelis, Roger S McIntyre et al. 7 citations
Suicide is a pressing public health issue, with over 700,000 individuals dying each year. Ketamine has emerged as a promising treatment for suicidal thoughts and behaviors (STBs), yet the complex mechanisms underlying ketamine’s anti-suicidal effect are not fully understood. Computational psychiatry provides a promising framework for exploring the dynamic interactions underlying suicidality and...
Brain Sciences June 4, 2023 Muhammad Youshay Jawad, Saleha Qasim, Menglu Ni et al. 46 citations
Bipolar depression remains a clinical challenge with a quarter of patients failing to respond to initial conventional treatments. Although ketamine has been extensively studied in unipolar depression, its role in bipolar disorder remains inconclusive. The aim of our scoping review was to comprehensively synthesize the current clinical literature around ketamine use in bipolar depression. A...
Journal of Psychopharmacology May 16, 2023 Noah Chisamore, Kevork Danayan, Nelson B Rodrigues et al. 13 citations
Background: Ketamine is an emerging treatment for treatment-resistant depression (TRD) associated with rapid and robust improvements in depressive symptoms and suicidality. However, the efficacy and safety of ketamine in transitional age youth (TAY; age 18–25) populations remains understudied. Methods: In this retrospective analysis, TAY patients (n = 52) receiving ketamine for TRD were matched...
Bipolar Disorders May 1, 2023 William S H Kim, Mikaela K Dimick, Danielle Omrin et al.
There remain few efficacious treatments for bipolar depression, which dominates the course of bipolar disorder (BD). Despite multiple studies reporting associations between depression and cerebral blood flow (CBF), little is known regarding CBF as a treatment target, or predictor and/or indicator of treatment response, in BD. Nitrous oxide, an anesthetic gas with vasoactive and putative...
CNS Spectrums April 1, 2023 Amanda Jones, Roger S McIntyre, Mark Jacobsen et al.
AbstractBackgroundTreatments for MDD that can improve both overall depressive and anhedonic symptoms are urgently needed.AXS-05 (dextromethorphan-bupropion) is a novel, oral, investigational NMDA receptor antagonist with multimodal activity being developed for MDD. The dextromethorphan component of AXS-05 is an NMDA receptor antagonist and a sigma-1 receptor agonist. The bupropion component of...
Psychiatry Research March 5, 2023 Kevork Danayan, Noah Chisamore, Nelson B Rodrigues et al. 36 citations
Borderline personality disorder (BPD) has high rates of comorbidity with mood disorders, including treatment-resistant depression (TRD). Comorbidity of BPD with depression is associated with poorer response to antidepressants. Intravenous ketamine is a novel treatment for TRD that has not been specifically evaluated in patients with comorbid BPD. In this retrospective analysis of data collected...
World Journal of Biological Psychiatry January 18, 2023 Shakila Meshkat, Sipan Haikazian, Joshua D. Di Vincenzo et al. 61 citations
Abstract Objectives: Ketamine is a glutamate N-methyl-D-aspartate receptor antagonist that can be used to treat major depressive disorder by single or repeated infusions. However, the accessibility and scalability of oral ketamine make it preferred over intravenous ketamine. In this systematic review, we aim to evaluate the efficacy, tolerability, and safety of oral ketamine, esketamine and...
Bipolar Disorders January 13, 2023 Giovanni Martinotti, Bernardo Dell’osso, Giorgio Di Lorenzo et al. 72 citations
BACKGROUND: Bipolar depression accounts for most of the disease duration in type I and type II bipolar disorder (BD), with few treatment options, often poorly tolerated. Many individuals do not respond to first-line therapeutic options, resulting in treatment-resistant bipolar depression (B-TRD). Esketamine, the S-enantiomer of ketamine, has recently been approved for treatment-resistant...
Cancers January 7, 2023 Joshua D. Rosenblat, Froukje E. deVries, Zoe Doyle et al. 49 citations
Antidepressants require several weeks for the onset of action, a lag time that may exceed life expectancy in palliative care. Ketamine has demonstrated rapid antidepressant effects, but has been minimally studied in cancer and palliative care populations. Herein, the objective was to determine the feasibility, safety, tolerability and preliminary efficacy of intranasal racemic ketamine for...
Bipolar Disorders December 14, 2022 Farhan Fancy, Nelson B Rodrigues, Joshua D. Di Vincenzo et al. 35 citations
Abstract Background Clinical trials have demonstrated rapid antidepressant effects with intravenous (IV) ketamine for major depressive disorder, with relatively less research specifically for bipolar depression. Herein, we describe the real‐world effectiveness of repeated ketamine infusions for treatment‐resistant bipolar depression. Methods This study was conducted in a community clinic in...
Journal of Affective Disorders December 1, 2022 Anastasia Levinta, Shakila Meshkat, Roger S McIntyre et al.
Ketamine has demonstrated rapid and significant antidepressant effects in patients with treatment resistant depression (TRD). Herein, we conducted a systematic review to determine ketamine's efficacy as a function of the stage of treatment resistance (e.g., number of failed treatments) among individuals with TRD. A systematic search of PubMed and Scopus from inception to August 2021 was...
Neuropharmacology November 1, 2022 Muhammad Youshay Jawad, Joshua D. Di Vincenzo, Sebastian Badulescu et al. 29 citations
Over the past two decades, ketamine has emerged as a novel effective and safe rapid-acting antidepressant. While the vast majority of studies on ketamine have focused on its ability to reduce the severity of depression broadly, its effectiveness in specific domains such as cognition, anhedonia, suicidality, and workplace/social/scholastic functionality has been neglected. Similarly, current...
Annals of Clinical Psychiatry November 1, 2022 David C J Chen-Li, Leanna M.W. Lui, Joshua D. Rosenblat et al. 22 citations
BACKGROUND: Postpartum depression (PPD) is a severe, debilitating mood disorder with consequences for both mothers and children, highlighting the need for rapid-acting and effective treatments for PPD. The aim of this narrative review is to synthesize the available literature on the administration of ketamine for PPD and propose ketamine as a viable and advantageous treatment. METHODS: A search...
JAMA Psychiatry October 19, 2022 T. Rhee, S. Shim, B. Forester et al. 139 citations
Importance Whether ketamine is as effective as electroconvulsive therapy (ECT) among patients with major depressive episode remains unknown. Objective To systematically review and meta-analyze data about clinical efficacy and safety for ketamine and ECT in patients with major depressive episode. Data Sources PubMed, MEDLINE, Cochrane Library, and Embase were systematically searched using...
Journal of Affective Disorders October 15, 2022 Isak Joneborg, Yena Lee, Joshua D. Di Vincenzo et al.
Few studies have evaluated the efficacy of ketamine-assisted psychotherapy (KAP) in the treatment of treatment-resistant depression (TRD) and substance use disorders (SUD). A systematic review of clinical trials reporting on the efficacy of KAP and discussing mechanisms of action, identified on PubMed and PsycInfo. Five randomized-controlled trials reported on the efficacy of KAP treatment and...
CNS Drugs October 1, 2022 Niloufar Pouyan, Zahra Halvaei Khankahdani, Farnaz Younesi Sisi et al. 16 citations
Preliminary results from randomized controlled studies as well as identified molecular, cellular, and circuit targets of select psychedelics (e.g., psilocybin) suggest that their effects are transdiagnostic. In this review, we exploit the Research Domain Criteria (RDoC) transdiagnostic framework, to synthesize extant literature on psilocybin. We aimed to identify RDoC-based effects of...
The Canadian Journal of Psychiatry August 17, 2022 Joshua D. Rosenblat, Muhammad Ishrat Husain, Yena Lee et al. 58 citations
Objective Serotonergic psychedelics are re-emerging as potential novel treatments for several psychiatric disorders including major depressive disorder. The Canadian Network for Mood and Anxiety Treatments (CANMAT) convened a task force to review the evidence and provide a consensus recommendation for the clinical use of psychedelic treatments for major depressive disorder. Methods A systematic...
Expert Opinion on Drug Safety May 3, 2022 Danica Nogo, Hana Nazal, Yuetong Song et al. 17 citations
INTRODUCTION: Ketamine is an established intervention for treatment-resistant depression (TRD). However, long-term adverse effects with repeated doses remain insufficiently characterized. Although several animal models have shown N-methyl-D-aspartate glutamate receptor antagonists to produce various neuropathological reactions, attention surrounding the risk of brain lesions has been minimal....
Journal of Psychiatric Research May 1, 2022 Yazen Alnefeesi, David C J Chen-Li, Ella Krane et al. 177 citations
Ketamine is a promising therapeutic option in treatment-resistant depression (TRD). The acute efficacy of ketamine in TRD has been demonstrated in replicated randomised-controlled trials (RCTs), but the generalizability of RCT data to real-world practice is limited. To this end, we conducted a systematic review (Search date: 25/12/2021; 1482 records identified) and meta-analysis of studies...
Journal of Psychiatric Research May 1, 2022 Tuyen T. Le, Isabel Pazos Cordero, Muhammad Youshay Jawad et al. 82 citations
While ketamine has been used clinically over the past decades, it has only been recently shown to be a promising therapy for treatment-resistant depression (TRD). However, ketamine and related dissociative agents may also be misused recreationally, creating significant concerns for abuse liability when prescribed for depression. Although the abuse potential of ketamine is widely recognized,...
Psychiatry Research April 25, 2022 Hartej Gill, Parnian Puramat, Pankti Patel et al. 16 citations
The use of psilocybin as treatment for major depressive disorder (MDD) has been examined as a promising alternative to traditional first-line options. We reviewed existing literature to provide a synthesis of the extant neuroimaging observations with psilocybin, and to identify putative therapeutic targets for target engagement studies with psilocybin, and potentially other psychedelics. We...