MAK354
Homocysteine Assay Kit
sufficient for 100 fluorometric tests
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About This Item
Code UNSPSC :
12161503
Produits recommandés
Utilisation
sufficient for 100 fluorometric tests
Méthode de détection
fluorometric
Maladie(s) pertinente(s)
cardiovascular diseases
Catégories apparentées
Description générale
Homocysteine is a non-proteogenic amino acid synthesized intracellularly by removal of the N-methyl group from the essential amino acid methionine. Homocysteine is exported from cells into the blood, where it exists mainly as an oxidized disulfide species, either as a dimer or bound to cysteine residues of serum proteins. The reduced form of homocysteine (‘free′ homocysteine) can be metabolized into cysteine via the transsulfuration pathway; however, it can also undergo intramolecular cyclization, forming the highly reactive pro-oxidant homocysteine thiolactone. Subsequent N-homocysteinylation of protein lysine residues by the reactive thiolactone disrupts protein conformation, leading to formation of cytotoxic protein aggregates. Homocysteinylated proteins may also act as autoantigens, triggering arterial inflammation and atherosclerosis. Elevated plasma homocysteine concentration is a clinical biomarker for increased risk of cardiovascular disease, ischemic stroke and myocardial infarction. Severely elevated homocysteine levels (hyperhomocysteinemia) are correlated with a 4-fold increase in mortality due to heart attack and a 16-fold increase in the likelihood of recurrent stroke.
Caractéristiques et avantages
Compatible with high-throughput handling systems.
Adéquation
Suitable for the determination of total homocysteine concentration in plasma or serum.
Principe
The Homocysteine Assay Kit allows for quantification of total homocysteine in biological fluids such as plasma and serum. The assay is based on the reduction of homocysteine disulfides to free homocysteine, which is cleaved by a homocysteine-selective enzyme, generating an intermediate product. The intermediate reacts with a probe solution to form a stable fluorophore that emits in the far-red spectrum (λex = 658 nm/λem = 708 nm). The assay is not affected by physiological concentrations of other biological thiols (such as cysteine, methionine and glutathione), is high-throughput adaptable and can detect as low as 5 μM homocysteine.
Mention d'avertissement
Warning
Mentions de danger
Conseils de prudence
Classification des risques
Aquatic Chronic 3 - Eye Irrit. 2 - Met. Corr. 1 - Skin Irrit. 2
Code de la classe de stockage
8A - Combustible, corrosive hazardous materials
Classe de danger pour l'eau (WGK)
WGK 2
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
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