Subjective and Neurocognitive Profiling of Clinical Doses of 3,4-Methylenedioxymethamphetamine (MDMA) in Healthy Volunteers: Implications for Therapeutic Use
A recent clinical study administered therapeutic doses of MDMA (75‑125 mg) to healthy volunteers and measured both subjective experiences and neurocognitive performance. Participants reported marked increases in empathy, mood elevation, and sociability, with peak effects around 90 minutes and a return to baseline by six hours. Cognitive testing revealed only modest, transient slowing of reaction time and no significant memory impairment. Safety data showed stable vital signs and no serious adverse events, reinforcing MDMA’s emerging profile as a viable adjunct in psychotherapy, especially for PTSD.
Adenosine Surges: A Step Forward in Understanding Antidepressant Actions of Ketamine
A recent Nature study reveals that a single sub‑anesthetic dose of (R,S)-ketamine produces rapid, transient surges of extracellular adenosine in the medial prefrontal cortex, independent of NMDA‑receptor blockade. Using genetically encoded adenosine sensors, the researchers showed that these adenosine spikes...
Convergent Coexpression Reveals Shared Biological Mechanisms Underlying Common and Rare Variant Risk in Six Neuropsychiatric Disorders
The authors applied convergent co‑expression analysis to post‑mortem brain transcriptomes, integrating GWAS and rare‑variant burden data across Alzheimer’s, autism, bipolar disorder, epilepsy, Parkinson’s and schizophrenia. By meta‑analyzing co‑expression Z‑scores, they identified genes whose expression patterns align with both common and...
Towards Scalable Biomarker Discovery in Posttraumatic Stress Disorder: Triangulating Genomic and Phenotypic Evidence From a Health System Biobank
Researchers leveraged a large health‑system biobank to combine genomic polygenic risk scores with electronic health‑record phenotypes, creating a scalable pipeline for PTSD biomarker discovery. The analysis identified immune‑related and metabolic signatures that correlate with PTSD risk, and highlighted sex‑specific genetic...
Characterization of the Chromosome 7 Locus Associated with Suicidal Behavior
Researchers have pinpointed a chromosome 7 locus that shows a genome‑wide significant association with suicidal behavior. The discovery stems from a large meta‑analysis of suicide‑attempt GWAS, combined with expression quantitative trait loci (eQTL) mapping and single‑cell transcriptomic profiling of brain...
Orexin Receptor Antagonists for Major Depressive Disorder: Perspectives From a Systematic Review and Meta-Analysis
A systematic review and meta‑analysis of orexin receptor antagonists (QXR‑ANTs) in adults with major depressive disorder found a modest but statistically significant reduction in overall symptom scores (standardized mean difference –0.16) and a 52% increase in remission rates compared with...
Liver-Derived Complement Component 3 Promotes the Susceptibility to Stress-Induced Depression by Impairing Blood-Brain Barrier Integrity
Chronic stress drives the liver to overproduce complement component 3 (C3), which then travels through the bloodstream to the brain. In mouse models, hepatic C3 suppresses the tight‑junction protein claudin‑5 in nucleus accumbens endothelial cells, compromising blood‑brain barrier integrity and heightening...
SETDB1 Modulates Neuroinflammation in the Mouse Cortex by Regulating Neuronal P2rx7 Expression
A recent mouse study demonstrates that the histone methyltransferase SETDB1 suppresses neuroinflammation by repressing neuronal P2rx7 expression. Conditional loss of SETDB1 in cortical neurons doubled P2X7 mRNA levels, amplified microglial IL‑1β release, and produced anxiety‑ and depressive‑like behaviors. Pharmacologic blockade...
Local Chemoarchitecture Explains Widespread Lower Cortical Thickness Associated with Clinical High Risk for Psychosis
A new multimodal study links the widespread cortical thinning observed in individuals at clinical high risk (CHR) for psychosis to the brain's local chemoarchitecture. By integrating structural MRI with neurotransmitter receptor density maps, the researchers showed that regions with specific...
Assessing Molecular Gene by Treatment Interactions Using a Population of Neural Progenitors Exposed to Valproic Acid and Lithium
Researchers exposed a genetically diverse panel of 83 human neural progenitor cell lines to valproic acid (VPA) and lithium, measuring chromatin accessibility and gene expression. They identified over 1,000 gene‑by‑treatment interaction loci, many of which overlap with psychiatric disorder risk...
Neuronal HDAC9: A Key Regulator of Cognitive and Synaptic Aging, Rescuing Alzheimer’s Disease-Related Phenotypes
Recent research identifies neuronal HDAC9 as a pivotal regulator of synaptic health and cognition during aging. The study shows that HDAC9 expression declines in the cortex of Alzheimer’s disease (AD) patients and aged mice, correlating with synaptic loss and memory...
A Prefrontal Cortex-Nucleus Accumbens Circuit Attenuates Cocaine-Conditioned Place Preference Memories
Researchers identified that infralimbic prefrontal cortex neurons projecting to the nucleus accumbens shell (IL‑NAcSh) become hypoexcitable after repeated cocaine exposure, a change that lasts at least 15 days into withdrawal. This intrinsic hypoexcitability reduces the circuit’s ability to suppress cocaine‑associated...
Integrative GWAS Identifies Novel Loci and Genetic Links Between Psychiatric and Metabolic Factors in Anorexia Nervosa
An integrative genome‑wide association study of anorexia nervosa (AN) uncovered a novel, genome‑wide significant locus near the SOX5 gene and identified 86 risk loci through multi‑trait analysis, including 25 previously unknown signals such as VAMP2, LPL and BDNF. Genetic correlation...
Depression, but Not Anxiety, Is Associated with Epigenetic Age Accelerations Among Asian Older Adults
A new molecular psychiatry study of 672 community‑dwelling older Asian adults found that higher depressive symptom severity is associated with accelerated epigenetic aging, especially measured by the second‑generation PC‑PhenoEAA clock (β = 0.087 per standard‑deviation increase; clinical depression raises PC‑PhenoEAA by 0.24 SD)....
Molecular Regulatory Mechanisms of Schizophrenia-Associated Functional Non-Coding Variants
The Molecular Psychiatry study leveraged functional genomics to pinpoint 249 non‑coding SNPs that alter transcription‑factor binding across 99 schizophrenia risk loci. By integrating ChIP‑Seq, position‑weight‑matrix data and brain eQTL resources, the authors linked 207 of these variants to gene‑expression changes...
Neural Representations of Dynamical State and Trait Impulsivity in Individuals at Risk for Internet Gaming Disorder
Researchers used fMRI and a modified card‑guessing task to examine state and trait impulsivity in 87 college students at risk for internet gaming disorder (IGD). State impulsivity was captured as loss‑chasing behavior, which intensified with consecutive losses, while trait impulsivity...
Sex-Specific Neurodevelopmental Pathways to Depressive Symptoms
A longitudinal study of the Singapore GUSTO birth cohort reveals sex‑specific neurodevelopmental pathways linking childhood brain maturation to adolescent depressive symptoms. Using structure‑function coupling (SC‑FC) measured at ages 4.5, 6.0 and 7.5, researchers found that females exhibit a steeper decline...
Antipsychotic-Like Effects of the Selective Rho-Kinase 2 Inhibitor KD025 in Genetic and Pharmacological Mouse Models of Schizophrenia
The selective ROCK2 inhibitor KD025 (belumosudil) demonstrated antipsychotic‑like activity in both genetic (Arhgap10 S490P/NHEJ) and pharmacological (methamphetamine and MK‑801) mouse models of schizophrenia. KD025 restored reduced spine density in the medial prefrontal cortex and rescued deficits in a touchscreen visual‑discrimination...
Standardized Chronic Restraint Stress Protocols Reveal Dynamic Evolution of Behavioral Adaptations in Male Mice: Implications for Translational Neuroscience
Researchers evaluated multiple chronic restraint stress (CRS) protocols in male mice, revealing that short, high‑intensity sessions (6 hours for three days) produce persistent avoidance and repetitive behaviors, while extended low‑intensity exposure (2 hours for ten‑plus days) leads to progressive deficits in reward‑seeking...
TrkB Promotes the Neuronal Secretion of Soluble Siglec-2 (CD22) to Mitigate Microglial Activation and Alleviate Depression-Like Behaviors in Male Mice
The study reveals that activating the TrkB receptor in neurons triggers secretion of soluble CD22 (Siglec‑2), which dampens microglial inflammation and reverses depression‑like behaviors in male mice. A peptidomimetic compound, dSyn3, restores TrkB‑Gαi1/3‑Akt signaling, boosting CD22 levels, promoting dendritic spine...
A Longitudinal DNA Methylation Atlas and Its Link to Brain Structure and Mental Health
Researchers built a longitudinal DNA‑methylation atlas using the IMAGEN cohort of 506 adolescents, identifying 18 coordinated DNAm clusters that persist from age 14 to 19. The cluster architecture was validated in two older‑adult datasets (PPMI and ADNI), demonstrating lifespan stability....
Anti-NMDAR Encephalitis Impairs Intrinsic Hippocampal Dynamics Through Neuronal Hypercoupling, Hub Dominance, and Aberrant Ensembles
Researchers used in‑vivo calcium imaging and electrophysiology in a passive‑transfer mouse model to show that anti‑NMDAR encephalitis simultaneously suppresses overall hippocampal activity and amplifies intrinsic synchrony. The disease drives neuronal hypercoupling, hub dominance, and the formation of numerous aberrant ensembles...
Hyperactivation of Distinct Thalamic Nuclei Differentially Impairs Sleep Physiology in Rats
Researchers used chemogenetic activation (hM3Dq) to hyperactivate three thalamic nuclei—mediodorsal (MDT), ventral posteromedial/ lateral (VPT) and ventromedial (VMT)—in rats. Activation sharply reduced deep NREM sleep, increased wakefulness, and cut sleep spindle density across all groups. EEG analysis showed suppressed slow‑wave...
Stress-Induced Plasminogen Activator Inhibitor-1 (PAI-1) as a Blood Biomarker and Brain Risk Factor for PTSD
Researchers identified plasminogen activator inhibitor‑1 (PAI‑1) as a stress‑responsive protein that rises in the dorsal hippocampus of mice and in the blood of humans with post‑traumatic stress disorder (PTSD). Using a restraint‑stress model, they showed that corticosterone triggers PAI‑1 up‑regulation...
Circuit-Targeted Modulation of Anxiety Symptoms in Individuals with Major Depression: A Randomized Head-to-Head TMS Trial
A randomized head‑to‑head trial compared two transcranial magnetic stimulation (TMS) targeting strategies in patients with major depressive disorder who also exhibit significant anxiety. Using circuit‑specific maps that differentiate anxiosomatic from dysphoric networks, the study found that the anxiosomatic‑targeted protocol produced...
Correction: A Brain-Enriched circRNA Blood Biomarker Can Predict Response to SSRI Antidepressants
A correction was issued for the March 30 2026 paper on a brain‑enriched circRNA blood biomarker that predicts SSRI antidepressant response. The original manuscript mistakenly marked only one of three co‑corresponding authors, omitting the other two and their contact details. The update...
Anesthetics as Emerging Therapeutics for Post-Traumatic Stress Disorder (PTSD): Bridging Bench and Bedside
A recent Molecular Psychiatry review highlights anesthetics as a promising new class of therapeutics for post‑traumatic stress disorder (PTSD). It outlines how NMDA‑receptor antagonists, α2‑adrenergic agonists, GABA‑A modulators and certain opioids can modulate fear circuitry and memory reconsolidation. Pre‑clinical models...
Paradoxical Role of the Mesocorticolimbic Netrin1-DCC Pathway in Social Competition and Vulnerability to Methamphetamine Abuse During Adolescence
Researchers discovered that adolescent social competition up‑regulates the mesocorticolimbic Netrin‑1/DCC pathway, reshaping dopamine projections in the prefrontal cortex and heightening methamphetamine self‑administration in mice. Elevated DCC expression conferred social dominance but simultaneously increased drug‑seeking behavior. Pharmacological blockade of DCC reduced...
NADPH Oxidase-1 Suppression Prolongs the Antidepressant-Like Effect of Ketamine
Researchers introduced K‑4, a novel AMPA‑receptor positive allosteric modulator, which produced rapid and sustained antidepressant‑like effects in treatment‑resistant depression rat models. Bulk RNA‑seq revealed that K‑4 markedly down‑regulated NADPH oxidase‑1 (NOX‑1) in the medial prefrontal cortex and lateral habenula. Pharmacological...
BDNF Restores Impaired Long-Term Potentiation of GABAergic Synapses Induced by Chronic Ethanol Exposure in the VTA and Attenuates Reward-Seeking Behavior
Chronic intermittent ethanol exposure in mice reduces brain‑derived neurotrophic factor (BDNF) levels in the ventral tegmental area (VTA) and abolishes long‑term potentiation of GABAergic synapses (LTP GABA) onto dopamine neurons. This impairment is presynaptic, leading to heightened dopamine neuron activity during...
Comprehensive Single-Cell Transcriptomic Atlas of Microglia in Alzheimer’s Disease Mouse Models
A new study delivers a comprehensive single‑cell transcriptomic atlas of microglia from multiple Alzheimer’s disease mouse models. By profiling thousands of cells, researchers uncovered diverse microglial states, including disease‑associated subtypes linked to TREM2 signaling and amyloid pathology. The atlas integrates...
Autism Spectrum Disorder Across the Lifespan: Dynamic Symptom Trajectories and Multidimensional Support Framework
The Molecular Psychiatry review maps autism spectrum disorder (ASD) from childhood through old age, highlighting that symptom expression and functional challenges evolve across life stages. While pediatric ASD research dominates, the article underscores a stark evidence gap for adults and...
Mechanistic Insights Into Cannabidiol-Mediated TrkB Activation via FRS2 Interaction in Attenuating Alzheimer’s Disease Pathology and Cognitive Impairment
A recent preclinical study demonstrates that cannabidiol (CBD) directly engages the TrkB neurotrophin receptor through its PTB‑binding domain, recruiting the adaptor protein FRS2 to trigger robust downstream signaling. This activation attenuates amyloid‑β deposition, tau hyperphosphorylation, and neuroinflammation in transgenic Alzheimer’s...
Pursuing the Elusive Biosignature for Suicide: A Decennial Update
A new review surveys a decade of post‑mortem research seeking biological signatures of suicide, highlighting consistent alterations in stress‑related systems, inflammation, neuroplasticity, and especially serotonergic pathways. The authors compiled 129 studies, emphasizing shifts from hypothesis‑driven to data‑driven multi‑omic analyses, yet...
Genetic Pathways Linking Oxytocin-Vasotocin Hypothalamic Subunit Architecture with Psychiatric and Metabolic Traits
A recent genome‑wide analysis identified genetic variants shaping oxytocin‑vasotocin hypothalamic subunits that also influence risk for severe mental disorders and metabolic syndrome. Using UK Biobank data, researchers derived polygenic scores for oxytocin‑pathway genes and found significant associations with schizophrenia, bipolar...
Deciphering the Causal Influence of BMI and Related Metabolic, Inflammatory, and Cardiovascular Factors on Brain Structure: A Mendelian Randomization Study
The study applied univariate and multivariate Mendelian randomization to test whether body mass index (BMI) causally influences brain structure. Results indicate that genetically higher BMI leads to reduced cortical thickness, especially in the precentral and fusiform gyri. Visceral adipose tissue...
The Short-Chain Fatty Acid Butyrate Prevents Gut-Brain Amyloid-Β Pathology and Neuroinflammation in an Alzheimer Mouse Model
Researchers demonstrated that oral sodium butyrate supplementation prevents amyloid‑β accumulation and neuroinflammation in both the gut and brain of the SAMP8 mouse model of sporadic Alzheimer’s disease. Longitudinal analyses revealed early Aβ deposition in the enteric nervous system, leading to...
Combining Neurobiological Markers and a Sociodemographic Risk Score to Predict Adolescent Depression – An IDEA RiSCo Prospective Cohort Study
Researchers integrated inflammatory cytokines, kynurenine pathway balance, and amygdala reactivity with the IDEA‑RS sociodemographic risk score to predict adolescent depression over three years. The composite model (IDEA‑BIO‑RS) raised predictive accuracy from a 0.715 AUC to 0.889, correctly classifying 82.2% of...
Synaptic Correlates of Benzodiazepine Tolerance
Recent pre‑clinical work has mapped the synaptic changes that underlie benzodiazepine tolerance. Chronic exposure uncouples GABA(A) receptors from their benzodiazepine binding site, down‑regulates α1‑subunit mRNA, and reshapes receptor trafficking through auxiliary proteins such as Shisa7. These alterations weaken inhibitory signalling,...
A Nuclei-Specific Fronto-Amygdala Pathway and Its Neurotransmitter Receptor Distribution: Implications for Antidepressant Selection
Recent neuroimaging and tract‑tracing studies have identified a nuclei‑specific fronto‑amygdala pathway that links distinct amygdala subregions with ventromedial prefrontal cortex. The work maps serotonin, norepinephrine and dopamine receptor densities across these nuclei, revealing divergent pharmacological profiles for SSRIs and SNRIs....
The Novel Role of GADD45A in the Etiology of Autism: Modulating Neuronal Excitability via TET1/R-Loop Dependent Regulation of KCNQ5
Researchers identified GADD45A as a hub gene dysregulated in both valproic acid‑induced and MECP2‑related autism models. Deleting Gadd45a in mice produced core autistic traits, heightened neuronal excitability, and seizures, while rescuing GADD45A in excitatory mPFC neurons restored normal social behavior....
Myelin Dysfunction in Autism Spectrum Disorder: Insights Into Core Symptoms and Mechanisms of Brain Development
Recent research highlights myelin dysfunction as a central factor in autism spectrum disorder, linking abnormal white‑matter development to core social and communication deficits. Genetic and epigenetic studies reveal that disruptions in oligodendrocyte maturation, driven by mTOR and ERK signaling, occur...
Dual Regulatory Roles of CPT1C in Chronic Stress-Induced Depression-Related Outcomes
A recent study reveals that carnitine palmitoyltransferase 1C (CPT1C) exerts dual regulatory functions in chronic stress‑induced depression‑related phenotypes. CPT1C enhances surface expression of GluA1‑containing AMPA receptors via SAC1‑mediated lipid signaling while simultaneously dampening mTORC1 activity through AMPK pathways. Genetic deletion...
Nitric Oxide-Mediated S-Nitrosylation of TSC2 Drives mTOR Dysregulation Across Shank3 and Cntnap2 Models of Autism Spectrum Disorder
Researchers identified that neuronal nitric oxide (NO) S‑nitrosylates the TSC2 protein at cysteine 203, triggering its ubiquitination and degradation. The loss of TSC2 removes inhibition of the mTOR pathway, causing hyperactivation in both excitatory and inhibitory neurons of Shank3Δ4–22 and Cntnap2‑/‑...
Biomarker for Craving and Acamprosate Treatment Response in Patients with Alcohol Use Disorder: Insights From Multi-Omics
A multi‑omics investigation identified molecular signatures that link alcohol craving to acamprosate treatment response in patients with alcohol use disorder (AUD). The study highlighted IL17RB genetic variants and elevated plasma TNFSF10 as robust predictors of therapeutic success, while proteomic and...
Trends and Patterns of Medical Stimulant Use by US Adults
Recent analyses reveal a steady rise in medical stimulant prescriptions among U.S. adults, with a 30% increase between 2013 and 2022. The expansion of telehealth, especially after COVID‑19, contributed to roughly 40% of new adult ADHD initiations, while FDA alerts...
Pharmacogenomics of Antiepileptic Drug Mood Stabilizer Treatment Response in Bipolar Disorder: A MoStGen Consortium Study
The Mood Stabilizer Genomics (MoStGen) Consortium analyzed 917 bipolar disorder patients to identify genetic predictors of response to antiepileptic mood stabilizers (AMS). Genome‑wide association studies revealed a robust association between lamotrigine response and variants in ROBO2, and a gene‑level signal...
A Transcriptional Program Associated with Neurotransmission in the Living Human Brain
Researchers from the Living Brain Project combined prefrontal cortex biopsies from 130 neurosurgical patients with intracranial recordings of dopamine, serotonin, and other neurotransmitters. Differential‑expression analyses of single‑nucleus and bulk RNA‑seq data revealed reproducible gene‑expression signatures that correlate with fast‑scan cyclic...
Exercise Mimetics as Unexplored Therapeutics for Treating Depression
The paper proposes exercise mimetics—pharmacological agents that imitate endurance training—as a novel class of antidepressants. While regular physical activity cuts depression risk by about 18 percent, adherence challenges limit its real‑world impact. Exercise mimetics activate muscle signaling pathways and alter the...
Sex Differences in Placebo and Antidepressant Response to Intranasal Esketamine for Treatment-Resistant Depression
A pooled analysis of five double‑blind, placebo‑controlled intranasal esketamine trials (n≈1,016) confirms that esketamine significantly reduces Montgomery‑Åsberg Depression Rating Scale (MADRS) scores versus placebo. Female participants showed larger total MADRS improvements at later visits (days 22 and 28) and greater reductions in...