Neuroplasticity and Psychedelics: a comprehensive examination of classic and non-classic compounds in pre and clinical models
arXiv (Cornell University) – November 29, 2024
Source: OpenAlex
Summary
Psychedelics demonstrate remarkable potential for rapid, lasting treatment of neuropsychiatric conditions. Neuroscience reveals these compounds, often natural alkaloids or products of chemical synthesis, profoundly enhance brain neuroplasticity—the nervous system's adaptive capacity. Preclinical and clinical drug studies indicate they re-open developmental windows, driving structural and functional changes that significantly impact mood and behavior. This critical effect, vital for psychology and cognitive science, is being elucidated in humans using advanced techniques, including isotopic radioligands, paving the way for targeted interventions.
Abstract
Neuroplasticity, the ability of the nervous system to adapt throughout an organism's lifespan, offers potential as both a biomarker and treatment target for neuropsychiatric conditions. Psychedelics, a burgeoning category of drugs, are increasingly prominent in psychiatric research, prompting inquiries into their mechanisms of action. Distinguishing themselves from traditional medications, psychedelics demonstrate rapid and enduring therapeutic effects after a single or few administrations, believed to stem from their neuroplasticity-enhancing properties. This review examines how classic psychedelics (e.g., LSD, psilocybin, N,N-DMT) and non-classic psychedelics (e.g., ketamine, MDMA) influence neuroplasticity. Drawing from preclinical and clinical studies, we explore the molecular, structural, and functional changes triggered by these agents. Animal studies suggest psychedelics induce heightened sensitivity of the nervous system to environmental stimuli (meta-plasticity), re-opening developmental windows for long-term structural changes (hyper-plasticity), with implications for mood and behavior. Translating these findings to humans faces challenges due to limitations in current imaging techniques. Nonetheless, promising new directions for human research are emerging, including the employment of novel positron-emission tomography (PET) radioligands, non-invasive brain stimulation methods, and multimodal approaches. By elucidating the interplay between psychedelics and neuroplasticity, this review informs the development of targeted interventions for neuropsychiatric disorders and advances understanding of psychedelics' therapeutic potential.