• Lancet neurology · Nov 2023

    Review

    Stimulation of TREM2 with agonistic antibodies-an emerging therapeutic option for Alzheimer's disease.

    • Kai Schlepckow, Estrella Morenas-Rodríguez, Soyon Hong, and Christian Haass.
    • German Centre for Neurodegenerative Diseases, Munich, Germany.
    • Lancet Neurol. 2023 Nov 1; 22 (11): 104810601048-1060.

    AbstractNeurodegenerative disorders, including Alzheimer's disease, are associated with microgliosis. Microglia have long been considered to have detrimental roles in Alzheimer's disease. However, functional analyses of genes encoding risk factors that are linked to late-onset Alzheimer's disease, and that are enriched or exclusively expressed in microglia, have revealed unexpected protective functions. One of the major risk genes for Alzheimer's disease is TREM2. Risk variants of TREM2 are loss-of-function mutations affecting chemotaxis, phagocytosis, lipid and energy metabolism, and survival and proliferation. Agonistic anti-TREM2 antibodies have been developed to boost these protective functions in patients with intact TREM2 alleles. Several anti-TREM2 antibodies are in early clinical trials, and current efforts aim to achieve more efficient transport of these antibodies across the blood-brain barrier. PET imaging could be used to monitor target engagement. Data from animal models, and biomarker studies in patients, further support a rationale for boosting TREM2 functions during the preclinical stage of Alzheimer's disease.Copyright © 2023 Elsevier Ltd. All rights reserved.

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