A comparison of the in vivo uptake and metabolism of 3H-oestrone and 3H-oestradiol by normal breast and breast tumour tissues in post-menopausal women
✍ Scribed by J. M. McNeill; M. J. Reed; P. A. Beranek; R. C. Bonney; M. W. Ghilchik; D. J. Robinson; V. H. T. James
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- French
- Weight
- 426 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0020-7136
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✦ Synopsis
After infusion of 3H-oestradiol or 'H-oestrone into post-menopausal women with breast cancer, there was a significant uptake of both steroids by breast turnour and normal tissue. The ro ortion of oestrogen present in turnour tissue as H-oestradiol after infusion of 'H-oestradiol (89.4 f 3.5%, mean +-SD, n = 4) was significantly higher (p < 0.001) than in normal breast tissue (72.8 f 3.3%) obtained from the same women. Similarly, after infusion of 'H-oestrone, the proportion of oestrogen present as 3H-oestradiol (48.4 f 14.40h) was significantly higher than in normal breast tissue (19.1 & 6.4%). These results suggest that conversion of oestrone to oestradiol is enhanced in breast tumour tissue with little metabolism of oestradiol. This would account for the higher concentrations of oestradiol reported in breast tumour tissue in the presence of increased oestradiol 17/3-hydroxysteroid dehydrogenase activity.
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