The use of homologous and hetebologous 125 I-radioligands in the radioimmunoassay of progesterone
作者:R Allen
DOI:10.1016/0039-128x(78)90059-4
日期:1978.11
Eight homologous and heterologous 125I-radioligand systems for the radioimmunoassay of progesterone were examined. Using an antiserum raised to 11alpha-hydroxyprogesterone 11-succinyl-bovine serum albumin, standard curves were set up with the homologous radioligands, 11alpha-hydroxyprogesterone 11-succinyl-[125I]-iodotyramine, -[125I]-iodohistamine and -[125I]-iodotyrosine methyl ester. Heterologous bridge systems were represented by progesterone-11alpha-oxycarbonyl-[125I]-iodotyrosine methyl ester and 11alpha-hydroxyprogesterone 11-phthalyl-[125I]-iodotyrosine methyl ester, and heterologous site systems by progesterone-3-(O-carboxymethyl)oxime-[125I]-iodotyramine, progesterone-12-(O-carboxymethyl)oxime-[125I]-iodotyramine, and progesterone-20-(O-carboxymethyl)oxime-[125I]-iodohistamine. The preparation of the steroid derivatives and iodination by a two-phase method are described. The curves obtained from the homologous radioligands were relatively insensitive compared with a tritiated system, with the tyrosine methyl ester derivative providing a more sensitive assay than the corresponding tyramine or histamine analogues. The heterologous bridge systems gave more sensitive curves than the homologous tracers whilst the 3- and 12-(O-carboxymethyl)oxime derivatives of progesterone furnished curves as sensitive as the tritiated reference. Progesterone-20-(O-carboxymethyl)oxime-[125I]-iodohistamine was not bound by the antibody.
Erlanger et al., Journal of Biological Chemistry, 1959, vol. 234, p. 1090,1093
作者:Erlanger et al.
DOI:——
日期:——
Zorina, A. D.; Martynov, V. F.; Matyukhina, L. G., Journal of general chemistry of the USSR, 1980, vol. 50, p. 156 - 157
作者:Zorina, A. D.、Martynov, V. F.、Matyukhina, L. G.、Saltykova, I. A.