Oestrogen receptor expression in normal breast epithelium

Higher levels of oestrogen receptor (ER) expression in normal breast epithelium may compound the increase in breast cancer risk seen with prolonged estrogen exposure. In prior studies, we have used immunohistochemical ER assays on fresh frozen samples of benign breast tissue. Future studies will be...

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Veröffentlicht in:European journal of cancer (1990) 2000-09, Vol.36, p.27-28
Hauptverfasser: Khan, S.A, Rogers, M.A.M, Khurana, K.K, Siddiqui, J.F.M
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container_issue
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container_title European journal of cancer (1990)
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creator Khan, S.A
Rogers, M.A.M
Khurana, K.K
Siddiqui, J.F.M
description Higher levels of oestrogen receptor (ER) expression in normal breast epithelium may compound the increase in breast cancer risk seen with prolonged estrogen exposure. In prior studies, we have used immunohistochemical ER assays on fresh frozen samples of benign breast tissue. Future studies will be more feasible on paraffin-embedded samples, and newer, more sensitive antibodies are now available. We examined 30 samples of paraffin-embedded breast epithelium from postmenopausal women with two antibodies, 6F11 and TE111. We find that the median labelling indices for ER are significantly higher using these antibodies, compared with previous results. The threshold for ER positivity will, therefore, have to be reset in future studies, since there are still many issues that remain to be resolved in this area.
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subjects Breast - chemistry
Breast cancer risk
Epithelium - chemistry
Female
Humans
Middle Aged
Normal breast
Oestrogen receptor
Receptors, Estrogen - analysis
title Oestrogen receptor expression in normal breast epithelium
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