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L-Homocysteic acid (Synonyms: L-HCA)

Catalog No.GC66843

L-Homocysteic acid (L-HCA) is an endogenous excitatory amino acid that acts as a NMDA receptor agonist (EC50: 14 μM). L-Homocysteic acid is neurotoxic, and can be used in the research of neurological disorders.

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L-Homocysteic acid Chemical Structure

Cas No.: 14857-77-3

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10mg
$317.00
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Sample solution is provided at 25 µL, 10mM.

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Background

L-Homocysteic acid (L-HCA) is an endogenous excitatory amino acid that acts as a NMDA receptor agonist (EC50: 14 μM). L-Homocysteic acid is neurotoxic, and can be used in the research of neurological disorders[1][2][3].

L-Homocysteic acid activates NMDA receptor with an EC50 value of 14 μM[1].
L-Homocysteic acid (100 μM) induces large currents (1.8 nA) that is insensitive to the NMDA receptor-antagonist mixture in Purkinje cells[1].
L-Homocysteic acid (250 μM, 30 min) potently induces an acute excitotoxic reaction in ex vivo chick embryo retina[2].
L-Homocysteic acid (0-2 mM, 48 h) induces a concentration-dependent neurotoxic effect in rat primary neurons[3].

L-Homocysteic acid (intraperitoneal injection, 4-11 mmol/kg) elicits seizures in rats during early postnatal development[4].
L-Homocysteic acid (intraperitoneal injection, 100-1500 mg/kg) partially substitutes for NMDA, producing maximum values of 61-67% NMDA-lever responding at doses of 1000 and 560 mg/kg, respectively in Sprague-Dawley rats[5].

Animal Model: Male albino rats of the Wistar strain[4]
Dosage: 4, 5.5, 8, 11 mM/kg
Administration: Intraperitoneal injection, daily for 14 days
Result: Induced flexion seizures at 4 mmol/kg.
Led to intense tail flicking, pivoting, and locomotion.
Decreased ECoG (electrocorticograms) activity for 5-9 min.

[1]. M Yuzaki, et al. Characterization of L-homocysteate-induced currents in Purkinje cells from wild-type and NMDA receptor knockout mice. J Neurophysiol . 1999 Nov;82(5):2820-6.
[2]. J W Olney, et al. L-homocysteic acid: an endogenous excitotoxic ligand of the NMDA receptor. Brain Res Bull. 1987 Nov;19(5):597-602.
[3]. B Lockhart, et al. Inhibition of L-homocysteic acid and buthionine sulphoximine-mediated neurotoxicity in rat embryonic neuronal cultures with alpha-lipoic acid enantiomers. Brain Res. 2000 Feb 14;855(2):292-7.
[4]. P Mares, et al. Convulsant action of D,L-homocysteic acid and its stereoisomers in immature rats.
[5]. Katherine L Nicholson, et al. The discriminative stimulus effects of N-methyl-D-aspartate glycine-site ligands in NMDA antagonist-trained rats. Psychopharmacology (Berl). 2009 Apr;203(2):441-51.

Chemical Properties

Cas No. 14857-77-3 SDF Download SDF
Synonyms L-HCA
Formula C4H9NO5S M.Wt 183.18
Solubility Storage Store at -20°C
General tips Please select the appropriate solvent to prepare the stock solution according to the solubility of the product in different solvents; once the solution is prepared, please store it in separate packages to avoid product failure caused by repeated freezing and thawing.Storage method and period of the stock solution: When stored at -80°C, please use it within 6 months; when stored at -20°C, please use it within 1 month.
To increase solubility, heat the tube to 37°C and then oscillate in an ultrasonic bath for some time.
Shipping Condition Evaluation sample solution: shipped with blue ice. All other sizes available: with RT, or with Blue Ice upon request.

Complete Stock Solution Preparation Table

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1 mg 5 mg 10 mg
1 mM 5.4591 mL 27.2956 mL 54.5911 mL
5 mM 1.0918 mL 5.4591 mL 10.9182 mL
10 mM 0.5459 mL 2.7296 mL 5.4591 mL
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