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Principaux documents

SAE0053

Sigma-Aldrich

Lipoprotein, low density from human plasma, solution

Synonyme(s) :

LDL, Low density lipoprotein, beta-lipoprotein

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About This Item

Code UNSPSC :
12352202
Nomenclature NACRES :
NA.61
Le tarif et la disponibilité ne sont pas disponibles actuellement.

Forme

liquid

Niveau de qualité

Conditions d'expédition

dry ice

Température de stockage

−70°C

Catégories apparentées

Actions biochimiques/physiologiques

Low-density lipoprotein (LDL) is a lipoprotein that carries cholesterol throughout the body via blood circulation. LDL has a role in dispositioning cholesterol to tissues and organs of the body. Colloquially deemed as the "bad cholesterol", having high levels of LDL can lead to plaque formation in arteries.

LDL and HDL transport both dietary and endogenous cholesterol in the plasma. LDL is the main transporter of cholesterol and cholesteryl esters, and makes up more than half of the total lipoprotein in plasma. LDL is absorbed by the liver and other tissues via receptor mediated endocytosis. The cytoplasmic domain of the LDL receptor facilitates the formation of coated pits; receptor-rich regions of the membrane. The ligand binding domain of the receptor recognizes apo-B100 on LDL, resulting in the formation of a clathrin-coated vesicle. ATP-dependent proton pumps lower the pH inside the vesicle, resulting in dissociation of LDL from its receptor. After loss of the clathrin coat, the vesicles fuse with lysozomes, resulting in peptide and cholesteryl ester enzymatic hydrolysis. The LDL receptor can be recycled to the cell membrane. Insulin, tri-iodothyronine and dexamethasome have shown to be involved with the regulation of LDL receptor mediated uptake

Clause de non-responsabilité

Ce produit, destiné à la recherche scientifique, est soumis à une réglementation spécifique en France, y compris pour les activités d′importation et d′exportation (Article L 1211-1 alinéa 2 du Code de la Santé Publique). L′acheteur (c′est-à-dire l′utilisateur FINAL) est tenu d′obtenir une autorisation d′importation auprès du ministère français de la recherche, mentionné à l′article L1245-5-1 II du Code de la Santé Publique. En commandant ce produit, vous confirmez détenir l′autorisation d′importation requise.

Code de la classe de stockage

10 - Combustible liquids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable


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Certificats d'analyse (COA)

Lot/Batch Number

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Questions

1–2 sur 2 questions  
  1. When working with LDL (SAE0053), is it acceptable to store a working solution at 4°C if used within the same week for several treatments? Alternatively, can LDL go through freeze-thaw cycles?

    1 réponse
    1. To thaw the product, it should be quickly thawed in a 37°C water bath and removed as soon as it is thawed. The product should then be stored at 2 – 8°C for up to one week, at -20°C for up to three months, and at -70°C for up to 24 months. For further dilutions, it should be diluted with 0.15 M sodium chloride.

      Utile ?

  2. What is the difference between products SAE0053 and 437644 (both LDL from human plasma)? Can you provide more characetristics of SAE0053 product?

    1 réponse
    1. Regarding Product SAE0053, the volume and concentration are not fixed, the only certainty is that the total cholesterol content of one bottle is 10mg. The total LDL particle concentration (protein+cholesterol+other lipids) is not currently determined, but based on published literature it is expected to be approximately twice the cholesterol concentration.

      Please see the link below for testing performed on this product:
      https://www.sigmaaldrich.cn/specification-sheets/228/747/SAE0053-10MG______SIGMA____.pdf


      Regarding Product 437644, a 10 mg vial contains ~2 mg of protein. This product is under the product line Calbiochem®. The formulation is 150 mM NaCl, 0.01% EDTA, pH 7.4. The source of this material is prepared from plasma that has been shown by certified tests to be negative for HBsAg and for antibodies to HIV and HCV.

      Please see the link below for testing performed on this product:
      https://www.sigmaaldrich.com/specification-sheets/228/747/SAE0053-10MG______SIGMA____.pdf

      Utile ?

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