Biomaterial Database

Nonenzymatic glucosylation of human serum albumin and its influence on binding capacity of sulfonylureas. 1984

S Tsuchiya, and T Sakurai, and S Sekiguchi

To estimate the functional change occurring in human serum albumin by nonenzymatic glucosylation, glucosylated human serum albumin was prepared by in vitro incubation with glucose. The rate of glucosylation proceeded as a first-order reaction. The binding of sulfonylureas to serum albumin was determined by equilibrium gel filtration. Through this method, it was possible to estimate the binding capacity of a low water solubility drug with a high affinity to protein. The amounts of the sulfonylureas bound to glucosylated HSA decreased by 44% with tolazamide and acetohexamide, 50% with glibenclamide, and 52% with tolbutamide, compared to human serum albumin (HSA). This suggests that a high concentration of glucosylated HSA in diabetic patients may possibly cause an increase in free drug concentration exceeding normal levels. This study shows that the decrease in the binding capacity of sulfonylureas with protein is due to the modification of albumin molecules by the covalent binding of glucose.

UI	MeSH Term	Description	Entries
D011485	Protein Binding	The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments.	Plasma Protein Binding Capacity,Binding, Protein
D002846	Chromatography, Affinity	A chromatographic technique that utilizes the ability of biological molecules, often ANTIBODIES, to bind to certain ligands specifically and reversibly. It is used in protein biochemistry. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Chromatography, Bioaffinity,Immunochromatography,Affinity Chromatography,Bioaffinity Chromatography
D002850	Chromatography, Gel	Chromatography on non-ionic gels without regard to the mechanism of solute discrimination.	Chromatography, Exclusion,Chromatography, Gel Permeation,Chromatography, Molecular Sieve,Gel Filtration,Gel Filtration Chromatography,Chromatography, Size Exclusion,Exclusion Chromatography,Gel Chromatography,Gel Permeation Chromatography,Molecular Sieve Chromatography,Chromatography, Gel Filtration,Exclusion Chromatography, Size,Filtration Chromatography, Gel,Filtration, Gel,Sieve Chromatography, Molecular,Size Exclusion Chromatography
D003920	Diabetes Mellitus	A heterogeneous group of disorders characterized by HYPERGLYCEMIA and GLUCOSE INTOLERANCE.
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000093423	Glycated Serum Albumin	Serum albumin that has undergone, in vivo, spontaneous, non-enzymatic modification with reducing sugars via the MAILLARD REACTION. They are analyzed to measure control of HYPERGLYCEMIA.	Glycated Albumin, Serum,Glycoalbumin,Glycosyl-Albumin,Glycosylated Serum Albumin,Serum Albumin, Glycosylated,Albumin, Glycated Serum,Albumin, Glycosylated Serum,Albumin, Serum Glycated,Glycosyl Albumin,Serum Albumin, Glycated,Serum Glycated Albumin
D012709	Serum Albumin	A major protein in the BLOOD. It is important in maintaining the colloidal osmotic pressure and transporting large organic molecules.	Plasma Albumin,Albumin, Serum
D013453	Sulfonylurea Compounds	A class of compounds in which a sulfone functional group is attached to UREA.	Compounds, Sulfonylurea
D017127	Glycation End Products, Advanced	A heterogeneous group of compounds derived from rearrangements, oxidation, and cross-linking reactions that follow from non-enzymatic glycation of amino groups in PROTEINS; LIPIDS; or NUCLEIC ACIDS. Their accumulation in vivo accelerates under hyperglycemic, oxidative, or inflammatory conditions. Heat also accelerates the formation of advanced glycation end products (AGEs) such seen with the browning of food during cooking.	Advanced Glycation End Product,Advanced Glycation Endproduct,Advanced Maillard Reaction End Product,Glycated Lipids,Glycotoxins,Maillard Product,Maillard Reaction End Product,Maillard Reaction Product,Advanced Glycation End Products,Advanced Glycation Endproducts,Advanced Maillard Reaction End Products,Glycation Endproducts, Advanced,Maillard Products,Maillard Reaction End Products,Maillard Reaction Products,Glycation Endproduct, Advanced,Lipids, Glycated,Product, Maillard Reaction,Products, Maillard,Products, Maillard Reaction,Reaction Products, Maillard
D066298	In Vitro Techniques	Methods to study reactions or processes taking place in an artificial environment outside the living organism.	In Vitro Test,In Vitro Testing,In Vitro Tests,In Vitro as Topic,In Vitro,In Vitro Technique,In Vitro Testings,Technique, In Vitro,Techniques, In Vitro,Test, In Vitro,Testing, In Vitro,Testings, In Vitro,Tests, In Vitro,Vitro Testing, In