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Discovery of (R)‑N‑Benzyl-2-(2,5-dioxopyrrolidin-1-yl)propanamide [(R)-AS‑1], a Novel Orally Bioavailable EAAT2 Modulator with Drug-like Properties and Potent Antiseizure Activity In Vivo
Journal article   Open access   Peer reviewed

Discovery of (R)‑N‑Benzyl-2-(2,5-dioxopyrrolidin-1-yl)propanamide [(R)-AS‑1], a Novel Orally Bioavailable EAAT2 Modulator with Drug-like Properties and Potent Antiseizure Activity In Vivo

Michał Abram, Marcin Jakubiec, Katelyn Reeb, Mary Hongying Cheng, Robin Gedschold, Anna Rapacz, Szczepan Mogilski, Katarzyna Socała, Dorota Nieoczym, Małgorzata Szafarz, …
Journal of medicinal chemistry, v 65(17), pp 11703-11725
08 Sep 2022
PMID: 35984707
url
https://doi.org/10.1021/acs.jmedchem.2c00534View
Published, Version of Record (VoR)CC BY V4.0 Open

Abstract

( R )-7 [( R )-AS-1] showed broad-spectrum antiseizure activity across in vivo mouse seizure models: maximal electroshock (MES), 6 Hz (32/44 mA), acute pentylenetetrazol (PTZ), and PTZ-kindling. A remarkable separation between antiseizure activity and CNS-related adverse effects was also observed. In vitro studies with primary glia cultures and COS-7 cells expressing the glutamate transporter EAAT2 showed enhancement of glutamate uptake, revealing a stereoselective positive allosteric modulator (PAM) effect, further supported by molecular docking simulations. ( R )-7 [( R )-AS-1] was not active in EAAT1 and EAAT3 assays and did not show significant off-target activity, including interactions with targets reported for marketed antiseizure drugs, indicative of a novel and unprecedented mechanism of action. Both in vivo pharmacokinetic and in vitro absorption, distribution, metabolism, excretion, toxicity (ADME-Tox) profiles confirmed the favorable drug-like potential of the compound. Thus, ( R )-7 [( R )-AS-1] may be considered as the first-in-class small-molecule PAM of EAAT2 with potential for further preclinical and clinical development in epilepsy and possibly other CNS disorders.

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Web of Science research areas
Chemistry, Medicinal
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