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RESEARCH ARTICLE
Contents Vol 74(11)

Adventures in Translocation: Studies of the Translocator Protein (TSPO) 18 kDa*

Jonathan J. Danon A , Dane F. L. Tregeagle A and Michael Kassiou https://orcid.org/0000-0002-6655-0529 A B
+ Author Affiliations
- Author Affiliations

A School of Chemistry, Faculty of Science, University of Sydney, Sydney, NSW 2006, Australia.

B Corresponding author. Email: michael.kassiou@sydney.edu.au

Australian Journal of Chemistry 74(11) 749-757 https://doi.org/10.1071/CH21176
Submitted: 26 July 2021  Accepted: 13 September 2021   Published: 5 October 2021

Abstract

The 18 kDa translocator protein (TSPO) is an evolutionarily conserved transmembrane protein found embedded in the outer mitochondrial membrane. A secondary target for the benzodiazepine diazepam, TSPO has been a protein of interest for researchers for decades, particularly owing to its well-established links to inflammatory conditions in the central and peripheral nervous systems. It has become a key biomarker for assessing microglial activation using positron emission tomography (PET) imaging in patients with diseases ranging from atherosclerosis to Alzheimer’s disease. This Account describes research published by our group over the past 15 years surrounding the development of TSPO ligands and their use in probing the function of this high-value target.

Keywords: translocator protein, medicinal chemistry, structure–activity relationships, CNS, neuroinflammation, microglia, PET imaging, neurodegeneration, single nucleotide polymorphism.


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