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Key Documents

A1908

Sigma-Aldrich

Asialofetuin from fetal calf serum

Type II (Sigma designation)

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About This Item

Numéro MDL:
MFCD00130561
Code UNSPSC :
12352202
Nomenclature NACRES :
NA.61

Source biologique

bovine

Niveau de qualité

200

Type

Type II (Sigma designation)

Forme

powder

Technique(s)

activity assay: suitable
inhibition assay: suitable

Impuretés

salt, essentially free
≤1.0% N-acetylneuraminic acid

Solubilité

H2O: soluble 1.0 mg/mL, clear to hazy, colorless to very faintly yellow

Température de stockage

2-8°C

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Application

Asialofetuin from fetal calf serum is suitable for use:
  • in the assay of the lactose binding activity of the galectin-7 by immunodetection of in situ binding activity to asialofetuin immobilized on nitrocellulose
  • in the inhibition of zona pellucida hardening of mouse oocytes
  • as an acceptor in sialyltransferase enzyme activity assay
Incorporation of asialofetuin (AF) in liposomes strongly enhance delivery to and endocytosis by cells displaying the AF receptor, notably hepatocytes. This provides a very efficient route for gene therapy.

Actions biochimiques/physiologiques

Asialofetuin (AF) binds to asialoglycoprotein receptor (ASGP-R) and is employed as a ligand for drug delivery to the hepatocytes. It aids serum-resistant lipoplexes for efficient gene deliver into the HepG2 (human hepatoblastoma) cells.
Feutins are glycoproteins that belong to the cystatin superfamily. They are characterized by the presence of two tandemly arranged cystatin-like domains and an unrelated domain. It binds to transforming growth factor (TGF)-β/BMP (bone morphogenic protein) cytokines.

Notes préparatoires

Enzymatic cleavage using neuraminidase

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

Eyeshields, Gloves, type N95 (US)

Certificats d'analyse (COA)

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Consulter la Bibliothèque de documents

A C Schroeder et al.
Biology of reproduction, 43(5), 891-897 (1990-11-01)
The zona pellucida of mouse oocytes becomes resistant to chymotrypsin digestion, or "hardened", when spontaneous maturation occurs in serum-free medium (De Felici and Siracusa, Gam Res 1982; 6:107). The hardened zona pellucida is refractory to sperm penetration, thus preventing fertilization.
Serum-resistant lipoplexes in the presence of asialofetuin
Liposomes, 2011, 425-434 (2010)
In vitro gene delivery mediated by asialofetuin-appended cationic liposomes associated with gamma-cyclodextrin into hepatocytes
Motoyama K, et al.
Journal of Drug Delivery, 2011 (2011)
W M Brown et al.
BioEssays : news and reviews in molecular, cellular and developmental biology, 14(11), 749-755 (1992-11-01)
Bovine fetuin, the first fetal protein to be described, has recently been shown to be a species homologue of a well known human plasma protein--alpha 2HS glycoprotein (alpha 2HS). The fetuins are now known to be members of the cystatin
X C Wang et al.
The Journal of biological chemistry, 264(3), 1854-1859 (1989-01-25)
The hepatic acute phase response is accompanied by increased levels of Gal beta 1-4GlcNAc alpha 2,6-sialyltransferase activity in liver and in circulation. Previous studies suggested that cytokines and glucocorticoids mediate the induction of this sialyltransferase activity. In this study the
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