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Luke R Johnson

Center for the Study of Traumatic Stress, Uniformed Services University, Bethesda, MD, United States.

2 papers in the library · 67 citations · publishing 2022-2025

Papers

Diverse therapeutic developments for post-traumatic stress disorder (PTSD) indicate common mechanisms of memory modulation.

Pharmacology & therapeutics November 1, 2022 Sanket B Raut, Padmaja A Marathe, Liza Van Eijk et al. 62 citations

PTSD is a chronic condition marked by abnormally persistent and distressing memories, with current treatments limited to psychotherapy and two FDA-approved drugs that reduce depression and anxiety but do not produce permanent remission. Early evidence suggests psychedelics like psilocybin, MDMA, LSD, cannabinoids, ayahuasca, and ketamine, especially combined with psychotherapy, may help by increasing trust and enabling modification of trauma-related memories. Research into memory reconsolidation has identified pharmacological targets to disrupt fear memories. Pre-clinical and clinical studies have investigated novel agents such as neuropeptide Y, oxytocin, cannabinoids, and neuroactive steroids. While many drugs show promise in pilot trials, large-scale clinical trials are needed for clinical adoption.

Effects of ketamine on fear memory extinction: a review of preclinical literature.

Frontiers in neuroscience January 1, 2025 Martin Boese, Rina Berman, Kennett Radford et al. 5 citations

This review summarizes preclinical studies on how ketamine affects fear extinction, the process of learning that trauma-related cues are no longer threatening. Findings are inconsistent: ketamine may enhance, impair, have no effect, or produce mixed effects on fear extinction, depending on dosage, route, and timing of administration. The authors recommend future research include more female subjects, use clinically relevant doses and routes, and employ behavioral assays relevant to human PTSD to improve translation from animal studies to clinical treatment.