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journal article·2024-08Open access

Development of a New Positron Emission Tomography Imaging Radioligand Targeting RIPK1 in the Brain and Characterization in Alzheimer's Disease

Ping Bai, Yu Lan, Yan Liu, Prasenjit Mondal, Ashley Gomm, Yulong Xu, Yanli Wang, Yongle Wang, Leyi Kang, Lili Pan, Frederick A. Bagdasarian, Madelyn Hallisey, Fleur Lobo, Breanna Varela, Se Hoon Choi, Stephen N. Gomperts, Hsiao‐Ying Wey, Shiqian Shen, Rudolph E. Tanzi, Changning Wang, Can Zhang

Advanced Science· Volume 11· Issue 32
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Abstract

Abstract Targeting receptor‐interacting protein kinase 1 (RIPK1) has emerged as a promising therapeutic stratagem for neurodegenerative disorders, particularly Alzheimer's disease (AD). A positron emission tomography (PET) probe enabling brain RIPK1 imaging can provide a powerful tool to unveil the neuropathology associated with RIPK1. Herein, the development of a new PET radioligand, [11C]CNY‐10 is reported, which may enable brain RIPK1 imaging. [11C]CNY‐10 is radiosynthesized with a high radiochemical yield (41.8%) and molar activity (305 GBq/µmol). [11C]CNY‐10 is characterized by PET imaging in rodents and a non‐human primate, demonstrating good brain penetration, binding specificity, and a suitable clearance kinetic profile. It is performed autoradiography of [11C]CNY‐10 in human AD and healthy control postmortem brain tissues, which shows strong radiosignal in AD brains higher than healthy controls. Subsequently, it is conducted further characterization of RIPK1 in AD using [11C]CNY‐10‐based PET studies in combination with immunohistochemistry leveraging the 5xFAD mouse model. It is found that AD mice revealed RIPK1 brain signal significantly higher than WT control mice and that RIPK1 is closely related to amyloid plaques in the brain. The studies enable further translational studies of [11C]CNY‐10 for AD and potentially other RIPK1‐related human studies.
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Research context

OpenAlex topics: Alzheimer's disease research and treatments · Cell death mechanisms and regulation · Neuroscience and Neuropharmacology Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Pulmonary and Critical Care Medicine Targeted Tracer Research and Development Laboratory Institute of Respiratory Health Frontiers Science Center for Disease‐related Molecular Network Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Research Center West China Hospital Sichuan University Chengdu Sichuan 610041 China

Athinoula A. Martinos Center for Biomedical Imaging Department of Radiology Massachusetts General Hospital Harvard Medical School Charlestown MA 02129 USA

Department of Pharmacy Renmin Hospital of Wuhan University Wuhan 430060 China

Genetics and Aging Research Unit McCance Center for Brain Health MassGeneral Institute for Neurodegenerative Disease Department of Neurology Massachusetts General Hospital Harvard Medical School 114 16th Street Charlestown MA 02129 USA

Department of Nuclear Medicine Laboratory of Clinical Nuclear Medicine West China Hospital Sichuan University Chengdu 610041 China

Department of Neurology Massachusetts General Hospital Harvard Medical School 114 16th Street Charlestown MA 02129 USA

Department of Anesthesia Critical Care and Pain Medicine Massachusetts General Hospital Harvard Medical School Charlestown MA 02129 USA

Funding

Alzheimer's Drug Discovery Foundation

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