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L-Homocysteine thiolactone hydrochloride 

Cat. No.: HY-101404A Purity: >98.0%
Data Sheet SDS Handling Instructions

L-Homocysteine thiolactone hydrochloride is an intramolecular thioester of homocysteine; prevents translational incorporation of homocysteine into proteins.

For research use only. We do not sell to patients.
L-Homocysteine thiolactone hydrochloride Chemical Structure

L-Homocysteine thiolactone hydrochloride Chemical Structure

CAS No. : 31828-68-9

Size Price Stock Quantity
10 mM * 1 mL in Water $88 In-stock
5 mg $80 In-stock
10 mg $120 In-stock
50 mg   Get quote  
100 mg   Get quote  

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L-Homocysteine thiolactone hydrochloride is an intramolecular thioester of homocysteine; prevents translational incorporation of homocysteine into proteins.

In Vitro

In all cell types, from bacterial to human, homocysteine is metabolized to homocysteine thiolactone by methionyl-tRNA synthetase. Elevated levels of homocysteine are an independent risk factor for cardiovascular disease in humans. Homocysteine can be harmful to human cells because of its metabolic conversion to homocysteine thiolactone, a reactive thioester. This conversion occurs in all human cell types, including endothelial cells[1]. Homocysteine thiolactone induces cell death and features of apoptosis including increased phosphotidylserine exposure on the membrane surface, increased apoptotic cells with hypoploid DNA contents, and internucleosomal DNA fragmentation in HL-60 cells[2]. Homocysteine thiolactone is cytotoxic and capable of promoting cell death, as measured by caspase-3 activation and DNA fragmentation. HcyT strongly activates IL-8 release[3].

In Vivo

Homocysteine thiolactone is toxic, induces epileptic seizures in rodents, and has been implicated in Alzheimer’s disease[4]. Homocysteine thiolactone induces two types of seizures, the coexistence of convulsive and nonconvulsive epilepsy. The grade of seizures is dose dependent[5].

Cell Assay

HUVEC are treated with homocysteine (1, 5, 10 mM) or homocysteine thiolactone (0.25, 0.5, 1 mM) for 3, 6, 12 and 24 h. Cell survival is determined by the MTT method. The optical density is measured at 570 nm with 630 nm as a reference[3].

Animal Administration

Rat: Homocysteine thiolactone is freshly prepared in saline and administered in a volume of 1.0 mL/100 g body weight. Rats are divided into control (saline-injected) group and homocysteine thiolactone-treated group. The latter group receives different doses 5.5 mM/kg, 8.0 mM/kg, and 11.0 mM/kg, respectively. Each rat is used only once[5].








Please store the product under the recommended conditions in the Certificate of Analysis.


Room temperature in continental US; may vary elsewhere

Solvent & Solubility

H2O: ≥ 23 mg/mL

* "<1 mg/mL" means slightly soluble or insoluble. "≥" means soluble, but saturation unknown.

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