Equimolar concentrations of [4-14C]oestriol and [6,9-3H]oestriol 16 alpha-monoglucuronide were simultaneously perfused through isolated rat livers. Oestriol was hydroxylated to 2-hydroxyoestriol and 6 xi-hydroxyoestriol; 2-hydroxyoestriol was further methylated to 2-methoxyoestriol. Oxidoreduction of oestriol led to the formation of 16 alpha-hydroxyoestrone, 16-0xooestradio-17
Zeitschrift fur Geburtshilfe und Perinatologie, 185(5), 284-287 (1981-10-01)
A method based on the inhibition of hemagglutination for the determination of estriol-16-alpha-glucuronide is compared to the method of Kober and Ittrich. A sufficient degree of correlation (p less than 0.001) is found, when the daily estrogen production (Kober-Ittrich) in
The Journal of pharmacology and experimental therapeutics, 229(1), 175-181 (1984-04-01)
The uptake of estradiol-17 beta(beta-D-glucuronide) (E(2)17G), estriol-16 alpha(beta-D-glucuronide (E(3)16G), estradiol-17 beta-3-(beta-D-glucuronide) (E(2)3G) and taurocholate (TC) into hepatocytes isolated from male and female rats was examined and found to be linear for at least 75 sec and to exhibit Michaelis-Menten kinetics.
The uptake of [4-14C]oestriol by the isolated perfused rat liver is 3.8 times faster as compared to that of simultaneously perfused [6,9-3H2]oestriol 16 alpha-monoglucuronide. During perfusion the concentration of both radioactive oestrogens decreased exponentially in perfusion medium (apparent kel: 0.061
Journal of chromatography. B, Biomedical sciences and applications, 695(2), 201-207 (1997-08-01)
An HPLC method for the direct and simultaneous determination of estriol 3- and 16-glucuronides in pregnancy urine is described. The method is based on direct derivatization of the glucuronic acid moiety in estriol glucuronides in urine with 6,7-dimethoxy-1-methyl-2(1H)-quinoxalinone-3-propionylcarboxylic acid hydrazide.
Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.