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Novel irreversible fluorescent probes targeting the 18 kDa translocator protein: synthesis and biological characterization.

Abstract：

:The 18 kDa translocator protein (TSPO) is a mitochondrial protein whose basal density is altered in several diseases, with the result that the evaluation of its expression levels by means of molecular imaging techniques represents a promising diagnostic approach. Experimental procedures using a labeled ligand often cause loss of the bound probe, and consequently high affinity ligands covalently binding the receptor protein are needed to overcome this problem. We have previously described a series of N,N-dialkyl-(2-phenylindol-3-yl)glyoxylamides as potent and selective TSPO ligands. Starting from these derivatives, we designed novel TSPO irreversible ligands bearing an electrophilic isothiocyanato group (7, 8), together with an irreversible NBD-fluorescent probe (18). The TSPO affinity of the new irreversible ligands was measured on rat tissue homogenates by [(3)H]Ro 5-4864 radiobinding kinetic assays, all compounds showing high affinities for the target protein. Further biological characterization of the fluorescent irreversible TSPO probe 18 was carried out by using fluorescent spectroscopy in human glioma cells.

journal_name

J Med Chem

journal_title

Journal of medicinal chemistry

authors

Taliani S,Da Pozzo E,Bellandi M,Bendinelli S,Pugliesi I,Simorini F,La Motta C,Salerno S,Marini AM,Da Settimo F,Cosimelli B,Greco G,Novellino E,Martini C

doi

10.1021/jm100100q

subject

Has Abstract

pub_date

2010-05-27 00:00:00

pages

4085-93

issue

10

eissn

0022-2623

issn

1520-4804

journal_volume

53

pub_type

杂志文章

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