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  • Electronic Resource  (3)
  • 1985-1989  (3)
  • Human epidermal growth factor (hEGF)  (2)
  • 5-trifluoromethyluracil  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 263 (1985), S. 682-685 
    ISSN: 1435-1536
    Keywords: 5-trifluorouracial ; sodium poly-α ; L-glutamate ; interaction ; viscosity ; 5-trifluoromethyluracil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The purpose of our research is to obtain an understanding of the binding mechanism and its correlations in terms of chemical structure and the potentiactive drug activity. The interaction of 5-fluorouracil (5-fluorouracil is used as an anticancer drug) with sodium poly-α,L-glutamate in aqueous solution was studied with a spectral method and viscosity measurement. From the binding data, the molar change in enthalpy, entropy and the number of binding sites on the polymer were calculated. It is very interesting that the value ofΔH0 of the binding of 5-fluorouracil with sodium poly-α,L-glutamate is smaller than that of 5-trifluoromethyluracil (although 5-trifluoromethyluracil is not used as an anticancer drug, the compound has a similar structure to 5-fluorouracil).
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1612-1112
    Keywords: Immunoaffinity chromatography ; Human epidermal growth factor (hEGF) ; Degradation products ; Immunoaffinity precolumn ; HPLC column-switching system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A high-performance liquid-chromatographic, column-switching system for automated sample pre-treatment and determination of human epidermal growth factor and its degradation products (hEGFs) is described. The system consists of an immunoaffinity precolumn (4.0×10mm) packed with diol silica immobilized with antibody against hEGF and an analytical ODS column (4.6×250mm). Samples such as cultured media ofE. coli, human urine, milk, seminal fluid and saliva can be directly injected on the immunoaffinity precolumn and the analytes of interest are trapped by the immobilized anti-hEGF antibody. After washing this precolumn with aqueous solvents, the analytes are desorbed with an aqueous solution of low pH and transferred to the analytical column to allow their separation in reversed phase mode. The recoveries of hEGFs spiked in these biological fluids were over 98%. The detection limit was 1 ng for a 1ml sample injection. This method was applied for the determination of hEGF levels in cultured media ofE. coli and biological fluids. Degradation of hEGF in human serum and urine was also examined.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1612-1112
    Keywords: Immunoaffinity chromatography ; Human epidermal growth factor (hEGF) ; Immobilization of antibody ; Pore size of diol silica ; Optimum coupling conditions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The preparation of support-coupled antibodies for high-performance immunoaffinity chromatography has been demonstrated. Diol silica had the least non-specific adsorption of all supports investigated. The optimum activation conditions for diol silica with 1,1′-carbonyl-diimidazole and the optimum coupling conditions for anti-human epidermal growth factor antibody as a function of salt concentration, pH and ligand concentration were selected. The pore size of the diol silica was an important factor in achieving good results. Diol silica with 500Å pore size had high loading capacity against the antigen. The use of F(ab′)2 or Fab as a ligand showed almost the same chromatographic characteristics as IgG.
    Type of Medium: Electronic Resource
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