The Briefing

Continuous newsroom coverage of clinically relevant evidence — newest first.

This week

24 stories
  1. SSRIs Induce Spatially Distinct Molecular Changes in Dorsal Raphe Serotonin Neurons
    Molecular Psychiatry ·Animal Study · May 17, 2026

    SSRIs Induce Spatially Distinct Molecular Changes in Dorsal Raphe Serotonin Neurons

    A mouse study reveals how fluoxetine alters gene expression and neuropeptide levels in specific serotonergic subpopulations.

  2. SCCM and ESICM launch 2026 guideline for Sepsis and Septic Shock Management
    SCCM/ESICM ·Clinical Guideline · May 17, 2026

    SCCM and ESICM launch 2026 guideline for Sepsis and Septic Shock Management

    The updated Surviving Sepsis Campaign guidelines emphasize earlier, more precise interventions, including new screening tool recommendations.

  3. CANMAT and ICOCS launch 2025 international guideline for Obsessive-Compulsive Disorder
    CANMAT/ICOCS ·Clinical Guideline · May 17, 2026

    CANMAT and ICOCS launch 2025 international guideline for Obsessive-Compulsive Disorder

    New joint guidelines establish a clear, tiered algorithm for OCD management, solidifying first-line options and defining evidence-based augmentation.

  4. AHA and ACC launch 2026 guideline for Acute Pulmonary Embolism in Adults
    AHA/ACC/ACCP/ACEP/CHEST/SCAI/SHM/SIR/SVM/SVN ·Clinical Guideline · May 17, 2026

    AHA and ACC launch 2026 guideline for Acute Pulmonary Embolism in Adults

    A new clinical categorization system for acute PE refines risk stratification, enabling more precise management and expanding outpatient treatment.

  5. Autism Subtypes Linked to Distinct Brain Connectivity and Biological Pathways
    Nature Neuroscience ·Animal Study · May 17, 2026

    Autism Subtypes Linked to Distinct Brain Connectivity and Biological Pathways

    A cross-species neuroimaging study identifies two replicable autism subtypes with specific functional connectivity patterns and biological underpinnin

  6. Simvastatin Rescues Cognitive Impairment in Alzheimer's Model via Epigenetic and Synaptic Pathways
    Neuropsychopharmacology ·Animal Study · May 17, 2026

    Simvastatin Rescues Cognitive Impairment in Alzheimer's Model via Epigenetic and Synaptic Pathways

    A preclinical study in mice identifies specific molecular mechanisms by which simvastatin may improve cognitive function in Alzheimer's disease.

  7. Military Blood Supply Insufficient for Large-Scale Combat Operations
    Journal of Trauma: Injury, Infection, and Critical Care ·In Vitro Study · May 17, 2026

    Military Blood Supply Insufficient for Large-Scale Combat Operations

    Simulation reveals current Forward Resuscitative Surgical Detachment blood strategies, even with walking blood banks, fail rapidly under high casualty

  8. Favipiravir Safe, Well-Tolerated for Mild-to-Moderate Lassa Fever
    Nature Medicine ·Randomized Controlled Trial · May 17, 2026

    Favipiravir Safe, Well-Tolerated for Mild-to-Moderate Lassa Fever

    A phase 2 trial in Nigeria provides pharmacokinetic data and supports favipiravir as an alternative to ribavirin for Lassa fever.

  9. Somatic Symptoms, Sensory Dysregulation Are Core to PTSD Presentation
    World Psychiatry ·Narrative Review · May 17, 2026

    Somatic Symptoms, Sensory Dysregulation Are Core to PTSD Presentation

    Current PTSD treatments often fall short because they overlook the central role of physical sensations and sensory processing.

  10. Cameroon Football Reveals Gaps in Cardiac Screening, Emergency Preparedness
    British Journal of Sports Medicine ·Cross-Sectional Study · May 17, 2026

    Cameroon Football Reveals Gaps in Cardiac Screening, Emergency Preparedness

    A cross-sectional study highlights critical deficiencies in cardiovascular screening and sudden cardiac arrest response among football teams in Camero

  11. ED Nudge Strategy Increases Naltrexone Prescribing for Alcohol Misuse
    Annals of emergency medicine ·Non-Randomized Controlled Trial · May 17, 2026

    ED Nudge Strategy Increases Naltrexone Prescribing for Alcohol Misuse

    A multicomponent emergency department protocol significantly raised naltrexone initiation for patients with alcohol-related diagnoses.

  12. Refining Lower Limb TMS: Identifying MEPs in Resting Ipsilateral Muscles
    Brain Research ·Cohort Study · May 17, 2026

    Refining Lower Limb TMS: Identifying MEPs in Resting Ipsilateral Muscles

    This study quantifies motor evoked potentials in the non-target resting leg, offering methodological clarity for transcranial magnetic stimulation.

  13. IBD Inflammation Augments CHIP Risk, APE1/Ref-1 Identified as Therapeutic Target
    Blood ·Cohort Study · May 17, 2026

    IBD Inflammation Augments CHIP Risk, APE1/Ref-1 Identified as Therapeutic Target

    A new study links inflammatory bowel disease to increased clonal hematopoiesis of indeterminate potential, identifying a specific molecular pathway.

  14. Demographics Influence Etiology in 2,052 Patients With Late-Onset Seizures
    Neurology ·Cohort Study · May 17, 2026

    Demographics Influence Etiology in 2,052 Patients With Late-Onset Seizures

    A multicenter study finds that while stroke remains common, neurodegeneration and unexplained causes dominate the geriatric epilepsy profile.

  15. Selective HDAC6 Inhibition Improves Motor Function in Preclinical ALS Models
    Brain ·Preclinical Study · May 17, 2026

    Selective HDAC6 Inhibition Improves Motor Function in Preclinical ALS Models

    A CNS-penetrant small molecule restores protein clearance and axonal transport, reducing neurofilament levels and TDP-43 pathology.

  16. Intravenous Magnesium Sulfate Reduces Rescue Analgesia for Acute Headache
    Annals of emergency medicine ·Randomized Controlled Trial · May 16, 2026

    Intravenous Magnesium Sulfate Reduces Rescue Analgesia for Acute Headache

    A randomized trial finds adjunctive magnesium sulfate increases treatment success and patient satisfaction, despite pain reduction not meeting clinica

  17. Multimodal AI System Matches Clinicians in Simulated Telehealth Diagnostics
    Nature Medicine ·Randomized Controlled Trial · May 16, 2026

    Multimodal AI System Matches Clinicians in Simulated Telehealth Diagnostics

    A new AI system, multimodal AMIE, integrates diverse data types to achieve high diagnostic accuracy and conversational quality in simulated telehealth

  18. ALS Subtypes Show Distinct Immune Remodeling, Linking Blood Changes to Spinal Cord Damage
    Nature Neuroscience ·Cohort Study · May 16, 2026

    ALS Subtypes Show Distinct Immune Remodeling, Linking Blood Changes to Spinal Cord Damage

    A new study details specific immune cell dynamics and molecular programs in ALS, revealing distinct patterns across disease subtypes.

  19. Thrombectomy Improves Functional Independence in Medium-Vessel Occlusion Stroke
    New England Journal of Medicine ·Randomized Controlled Trial · May 16, 2026

    Thrombectomy Improves Functional Independence in Medium-Vessel Occlusion Stroke

    A randomized trial shows endovascular thrombectomy increases functional independence but also raises symptomatic intracranial hemorrhage risk in mediu

  20. SHANK3 Haploinsufficiency in Macaques Reveals Diverse Behavioral, Cognitive Phenotypes
    Neuron ·Animal Study · May 16, 2026

    SHANK3 Haploinsufficiency in Macaques Reveals Diverse Behavioral, Cognitive Phenotypes

    A new macaque model of SHANK3 haploinsufficiency provides insights into Phelan-McDermid syndrome and potential biomarkers.

  21. SSPOP Mutations Linked to Pediatric Epilepsy and Developmental Disorders
    Brain ·Preclinical Study · May 16, 2026

    SSPOP Mutations Linked to Pediatric Epilepsy and Developmental Disorders

    Researchers identify pathogenic variants in a supposed pseudogene, expanding the diagnostic landscape for unexplained neurodevelopmental delay.

  22. Long-Duration Levodopa Response Distinguishes Parkinson's, Predicts Outcomes
    Annals of Neurology ·Cohort Study · May 16, 2026

    Long-Duration Levodopa Response Distinguishes Parkinson's, Predicts Outcomes

    A study details how sustained levodopa motor improvement helps differentiate parkinsonian syndromes and offers prognostic insights for PD.

  23. Gender-Affirming Mastectomy Linked to Sustained Satisfaction, Quality of Life
    Plastic & Reconstructive Surgery ·Cross-Sectional Study · May 16, 2026

    Gender-Affirming Mastectomy Linked to Sustained Satisfaction, Quality of Life

    A cross-sectional study finds high patient-reported chest satisfaction and psychological well-being years after gender-affirming mastectomy.

  24. Alantolactone and Temozolomide Combination Targets Glioblastoma Stemness, Lipid Metabolism
    Brain Research ·Animal Study · May 16, 2026

    Alantolactone and Temozolomide Combination Targets Glioblastoma Stemness, Lipid Metabolism

    Preclinical findings suggest alantolactone combined with temozolomide may overcome glioblastoma resistance by modulating the Hippo pathway.