2. Membrane Transporter/Ion Channel Neuronal Signaling
  3. iGluR
  4. L-Homocysteic acid

L-Homocysteic acid  (Synonyms: L-HCA)

Cat. No.: HY-138903 Purity: ≥98.0%
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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.

For research use only. We do not sell to patients.

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L-Homocysteic acid Chemical Structure

L-Homocysteic acid Chemical Structure

CAS No. : 14857-77-3

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Based on 1 publication(s) in Google Scholar

L-Homocysteic acid Related Antibodies

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Description

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].

IC50 & Target[1]

NMDA Receptor

14 μM (EC50)

Cellular Effect
Cell Line Type Value Description References
HEK293 EC50
< 100 μM
Compound: 4
Stimulation of [3H]phosphatidylinositol accumulation by rat Metabotropic glutamate receptor 4 co-expressed with Gqi9 protein in HEK 293 cells; Active
Stimulation of [3H]phosphatidylinositol accumulation by rat Metabotropic glutamate receptor 4 co-expressed with Gqi9 protein in HEK 293 cells; Active
[PMID: 15801843]
In Vitro

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].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

L-Homocysteic acid Related Antibodies
In Vivo

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].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

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.
Molecular Weight

183.18

Formula

C4H9NO5S
CAS No.
Appearance

Solid

Color

White to off-white

Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

H2O : ≥ 100 mg/mL (545.91 mM)

DMSO : 50 mg/mL (272.96 mM; ultrasonic and warming and heat to 60°C; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions
Concentration Solvent Mass 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
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

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Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

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In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Calculation results:
Working solution concentration: mg/mL
This product has good water solubility, please refer to the measured solubility data in water/PBS/Saline for details.
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only.If necessary, please contact MedChemExpress (MCE).
Purity & Documentation
References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO / H2O 1 mM 5.4591 mL 27.2956 mL 54.5911 mL 136.4778 mL
5 mM 1.0918 mL 5.4591 mL 10.9182 mL 27.2956 mL
10 mM 0.5459 mL 2.7296 mL 5.4591 mL 13.6478 mL
15 mM 0.3639 mL 1.8197 mL 3.6394 mL 9.0985 mL
20 mM 0.2730 mL 1.3648 mL 2.7296 mL 6.8239 mL
25 mM 0.2184 mL 1.0918 mL 2.1836 mL 5.4591 mL
30 mM 0.1820 mL 0.9099 mL 1.8197 mL 4.5493 mL
40 mM 0.1365 mL 0.6824 mL 1.3648 mL 3.4119 mL
50 mM 0.1092 mL 0.5459 mL 1.0918 mL 2.7296 mL
60 mM 0.0910 mL 0.4549 mL 0.9099 mL 2.2746 mL
80 mM 0.0682 mL 0.3412 mL 0.6824 mL 1.7060 mL
100 mM 0.0546 mL 0.2730 mL 0.5459 mL 1.3648 mL

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

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L-Homocysteic acid Related Classifications

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  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

L-Homocysteic acid14857-77-3L-HCAiGluRIonotropic glutamate receptorsExcitotoxinembryo retinaPurkinje cellsneurotoxicityhomocysteic acidseizuresneuronInhibitorinhibitorinhibit

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