Assessment of estradiol and its metabolites in meat
2001
Maume, Daniel | Deceuninck, Yoann | Pouponneau, Karine | Paris, A. | Le Bizec, Bruno | André, François | Laboratoire des Dosages Hormonaux (LDH) ; École nationale vétérinaire, agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS) | Xénobiotiques ; Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Vétérinaire de Toulouse (ENVT) ; Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)
15 ref.
اظهر المزيد [+] اقل [-]International audience
اظهر المزيد [+] اقل [-]إنجليزي. Most studies related to research on steroids in main edible tissues (muscle, liver or kidney) have focused on measurement of parent or major metabolite residues. In order to evaluate the estradiol content in bovine edible tissues, a multi-step extraction procedure was developed in conjunction with parallel metabolism studies of [14C]–17β-estradiol in cattle (1–2). Various classes of free estradiol and conjugates were separated: estradiol −17β and −17β, estradiol-17-fatty acid esters, estradiol 17-glycoside, estradiol 3–glucuronide, estradiol–17-glycoside and 3- glucuronide (diconjugates) were separated. No sulphates conjugated forms have been found at the detection level of the method. The quantification was realized by calibration with deuterated 17β -estradiol -d3 standard and was validated at the ng kg–1 (ppt) level. Muscle, liver, kidney and fat samples from control or Revalor S® single (licensed implantation) or multi-implanted steers have been assayed.The results show a wide variation between animals, but both the highest value and the mean of total estradiol content in each group proportionally increase from untreated to multi-implanted animals. In accordance with international rules, a calculation of the daily food supply of estradiol by such edible tissues in comparison with the acceptable daily intake was performed.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Institut national de la recherche agronomique