cis-α-(Carboxycyclopropyl)glycine (L-CCG III) is a potent, competitive glutamate uptake inhibitor. cis-α-(Carboxycyclopropyl)glycine is a substrate of glutamate transporters (GluT) (EC50: 13 μM, 2 μM for EAAT 1 and EAAT 2, respectively). cis-α-(Carboxycyclopropyl)glycine inhibits a Na+-dependent high-affinity L-glutamate uptake in glial plasmalemmal vesicles (GPV) and synaptosomes[1][2].
DL-TBOA is a potent non-transportable inhibitor of excitatory amino acid transporters with IC50s of 70 μM, 6 μM and 6 μM for excitatory amino acid transporter-1 (EAAT1), EAAT2 and EAAT3, respectively. DL-TBOA inhibits the uptake of [14C]glutamate in COS-1 cells expressing the human EAAT1 and EAAT2 with Ki valuesof 42 μM and 5.7 μM, respectively. DL-TBOA blocks EAAT4 and EAAT5 in a competitive manner with Ki values of 4.4 μM and 3.2 μM, respectively[1][2][3].
LDN-212320(OSU-0212320) is a glutamate transporter EAAT2 activator; enhances EAAT2 levels by > 6 fold at concentrations < 5 μM after 24 h.IC50 value: 1.83 uM(EC50) [2]Target: EAAT2 activatorin vitro: LDN/OSU-0212320 increased EAAT2 protein levels in a dose-dependent(EC50=1.83 ± 0.27 μM) and time-dependent manner. LDN/OSU-0212320 increased EAAT2 protein levels and glutamate uptake function, but did not affect EAAT1 or EAAT3 protein levels. LDN/OSU-0212320 treatment markedly prevented neuronal loss and degeneration, as assessed by MAP2 immunostaining [2]. in vivo: After a single i.p. 40-mg/kg dose of LDN/OSU-0212320, EAAT2 protein levels and associated glutamate uptake increased by approximately 1.5- to 2-fold at 2 hours and by approximately 2- to 3-fold between 8 and 24 hours after injection. Even 72 hours after injection, an approximately 1.5-fold increase in EAAT2 protein levels could still be detected (data not shown). In addition, we found that LDN/OSU-0212320–induced EAAT2 protein levels and glutamate uptake were dose dependent [2].Small-molecule activator of glutamate transporter EAAT2 translation provides neuroprotectionBy Kong, Qiongman; Chang, Ling-Chu; Takahashi, Kou; Liu, Qibing; Schulte, Delanie A.; Lai, Liching; Ibabao, Brian; Lin, Yuchen; Stouffer, Nathan; Das Mukhopadhyay, Chitra; et alFrom Journal of Clinical Investigation (2014), 124(3), 1255-1267. Structure-activity relationship study of pyridazine derivatives as glutamate transporter EAAT2 activatorsBy Xing, Xuechao; Chang, Ling-Chu; Kong, Qiongman; Colton, Craig K.; Lai, Liching; Glicksman, Marcie A.; Lin, Chien-Liang Glenn; Cuny, Gregory D. From Bioorganic & Medicinal Chemistry Letters (2011), 21(19), 5774-5777.
L-threo-3-Hydroxyaspartic acid is a potent EAAT inhibitor with Kis of 11, 19 and 14 μM for EAAT1, EAAT2 and EAAT3, respectively in HEK293 cell lines[1].
TFB-TBOA (CF3-Bza-TBOA) is a potent glutamate transporter blocker that potently suppresses the activity of glial transporters. TFB-TBOA shows IC50 values of 22, 17, and 300 nM for glutamate transporters EAAT1, EAAT2, and EAAT3 respectively in an uptake assay using cells transiently expressing EAATs[1].
DL-TBOA ammonium is a potent non-transportable inhibitor of excitatory amino acid transporters with IC50s of 70 μM, 6 μM and 6 μM for excitatory amino acid transporter-1 (EAAT1), EAAT2 and EAAT3, respectively. DL-TBOA ammonium inhibits the uptake of [14C]glutamate in COS-1 cells expressing the human EAAT1 and EAAT2 with Ki valuesof 42 μM and 5.7 μM, respectively. DL-TBOA ammonium blocks EAAT4 and EAAT5 in a competitive manner with Ki values of 4.4 μM and 3.2 μM, respectively[1][2][3].
WAY-213613 is a potent, selective human EAAT2 inhibitor (IC50, 85 nM), exhibits 59- and 45-fold selectivity over human EAAT1 and EAAT3. Inhibits glutamate uptake in rat cortical synaptosomes[1].
(±)-threo-3-Methylglutamic acid is a potent EAAT2/4 inhibitor. (±)-threo-3-Methylglutamic acid also is an ionotropic glutamate receptor agonist. (±)-threo-3-Methylglutamic acid inhibits glutamate uptake by rod outer segments[1][2].
GT 949 is a selective excitatory amino acid transporter-2 (EAAT2) positive allosteric modulator with an EC50 of 0.26 nM[1].
(±)-HIP-A is a non-competitive excitatory amino acid transporter (EAAT) blocker that effectively blocks Glu uptake (IC50=17-18 μM). (±)-HIP-A is also a lead compound against ischemia-induced neuronal degeneration. (±)-HIP-A can be used in the study of neurological diseases[1].
(±)-HIP-B is a non-competitive excitatory amino acid transporter (EAAT) blocker that effectively blocks Glu uptake (IC50=17-18 μM). (±)-HIP-B is also a lead compound against ischemia-induced neuronal degeneration. (±)-HIP-B can be used in the study of neurological diseases[1].
EAAT2 activator 1 is the potent activator of excitatory amino acid transporter 2 (EAAT2). EAAT2 is the major glutamate transporter and functions to remove glutamate from synapses. EAAT2 activator 1 increases EAAT2 protein levels dose-dependently[1].
Dihydrokainic acid (DHK) is a glutamate transporter GLT1 (EAAT2) inhibitor. Dihydrokainic acid impairs novel object recognition (NOR) memory performance in mice. Dihydrokainic acid also shows epileptogenic effects[1].