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Quantitative method for whole body autoradiography and application to tissue distribution study of FO-1561 in rats

Authors :
Shigeto Fujishita
Shinichi Okano
Hayao Shinozaki
Yoshie Yasukawa
Yukio Matsubara
Eiichi Nakajima
Source :
Drug Metabolism and Pharmacokinetics. 3:747-760
Publication Year :
1988
Publisher :
Japanese Society for the Study of Xenobiotics, 1988.

Abstract

Conventional whole-body autoradiography (MAR) shows detailed tissue distribution of radioisotopes “relatively”, not “quantitative”. We attempted to establish quantitative analytical method for MAR (QMAR) using computer-assisted densitometry system introduced from Dr. Sokoloff's laboratories, N.I.H. and Imaging-plate system developed by Fuji Photo Film Co., Ltd. Autoradiograms were prepared from rats after administration of (CH3-14C) FO-1561 (S-adenosylmethionine sulfate tosylate, SAMe) and exposed on X-ray films (Kodak, SB-5) for 3.5 days or Imaging-plates for 1.5 hrs with 14C-staircases. Measurement of isotope concentration was done from the autoradiograms by comparing optical densities or detection intensities of the regions of interest with a series of standards. Concentrations of SAMe-14C in blood, muscle, thymus, submaxillary gland and brain obtained from QMAR methods were comparable to those obtained from conventional tissue dissection method (LSC). Correlation coefficient between QMAR and LSC method was lager than 0.9. In addition, quantitative information was obtained on the distribution in such small organs which can not be dissected or on the localization of radioactivity in organ or tissue.

Details

ISSN :
09161139
Volume :
3
Database :
OpenAIRE
Journal :
Drug Metabolism and Pharmacokinetics
Accession number :
edsair.doi...........bd01b86318b73257c085a77c86b67a43
Full Text :
https://doi.org/10.2133/dmpk.3.747