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Current Medicinal Chemistry

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Review Article

Recent Advances in the Development of Antidepressants Targeting the Purinergic P2X7 Receptor

Author(s): Shinyoung Lee, Hyunsoo Ha, Jaebong Jang and Youngjoo Byun*

Volume 30, Issue 2, 2023

Published on: 29 August, 2022

Page: [164 - 177] Pages: 14

DOI: 10.2174/0929867329666220629141418

Price: $65

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Abstract

The purinergic P2X7 receptor (P2X7R) is an adenosine triphosphate (ATP)- gated cation channel protein. Although extracellular ATP (eATP) is maintained at the nanomolar concentration range under normal conditions, it is elevated to micromolar levels in response to cell stress or damage, resulting in activation of P2X7R in the brain. The binding of eATP to P2X7R in glial cells in the brain activates the NLRP3 inflammasome and releases pro-inflammatory cytokines, such as IL-1β, IL-6, IL-18, and TNFα. Depression has been demonstrated to be strongly associated with neuroinflammation activated by P2X7R. Therefore, P2X7R is an attractive therapeutic target for depression. Multinational pharmaceutical companies, including AstraZeneca, GlaxoSmithKline, Janssen, Lundbeck, and Pfizer, have developed CNS-penetrating P2RX7 antagonists. Several of these have been evaluated in clinical trials. This review summarizes the recent development of P2X7R antagonists as novel antidepressant agents in terms of structural optimization, as well as in vitro/in vivo evaluation and physicochemical properties of representative compounds.

Keywords: Purinergic P2X7 receptor, depression, neuroinflammation, ATP, structure-activity relationship, BBB penetration.

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