The Japanese journal of surgery

, Volume 17, Issue 5, pp 369–376 | Cite as

Analysis of estrogen receptors in human breast cancer by assays using monoclonal antibodies and by the dextran-coated charcoal method

  • Noboru Fujino
  • Kiyoshi Sakamoto
  • Nobuyuki Shigaki
  • Jun-ichi Yamashita
  • Masaharu Kimura
  • Masanobu Akagi
Original Articles


Estrogen receptors (ER) were analyzed in 63 human breast cancers by immunocytochemical assay, and by enzyme-immunoassay, using monoclonal antibodies against human ER protein, and also by the dextrancoated characoal method. The specific staining was observed only in the nucleus of cancer cells by the immunocytochemical assay, and the presence of nuclear staining by this assay was closely associated with the estimation of the cytosolic ER content by both the dextran-coated charcoal method and the enzyme-immunoassay. In the latter, the cytosolic ER content corres-pondingly increased with the nuclear ER content. Both the cytosolic and nuclear ER contents correlated well with those obtained by the dextrancoated charcoal method. Furthermore, the cytosolic ER contents obtained by the enzyme-immunoassay and the dextran-coated charcoal method correlated significantly with the age of the patient, but not with the nuclear ER contents. These above mentioned results suggest that ER is present mainly in the nucleus of breast cancer cells and that the cytosolic ER obtained by these two assays is the unoccupied one released from the nucleus.

Key Words

human breast cancer estrogen receptor enzyme-immuno-assay immunocytochemical assay dextran-coated charcoal method 


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Copyright information

© The Japan Surgical Society 1987

Authors and Affiliations

  • Noboru Fujino
    • 1
  • Kiyoshi Sakamoto
    • 1
  • Nobuyuki Shigaki
    • 1
  • Jun-ichi Yamashita
    • 1
  • Masaharu Kimura
    • 1
  • Masanobu Akagi
    • 1
  1. 1.Second Department of SurgeryKumamoto University Medical SchoolKumamotoJapan

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