Estrogen responsiveness and control of normal human breast proliferation.

2.50
Hdl Handle:
http://hdl.handle.net/10541/92047
Title:
Estrogen responsiveness and control of normal human breast proliferation.
Authors:
Anderson, Elizabeth; Clarke, Robert B; Howell, Anthony ( 0000-0002-3879-5991 )
Abstract:
Our understanding of the hormonal control of the proliferation of normal human breast epithelium is still surprisingly meager. However, the results of a number of recent studies have confirmed that estrogen is the major steroid mitogen for the luminal epithelial cell population (the usual targets for neoplastic transformation). Estrogen seemingly exerts its effects on cell division indirectly as there is complete dissociation between the population of luminal epithelial cells expressing the estrogen receptor (ER)4 and those that proliferate. We suggest that the ER-negative proliferating cells represent a precursor or stem cell population that differentiates to ER-containing, nonproliferative cells. In turn, these ER-positive cells act as 'estrogen sensors' and transmit positive or negative paracrine growth signals to the precursor cells depending on the prevailing hormonal environment. As yet there is no direct evidence supporting this hypothesis but we suggest ways in which it may be obtained. The implication of these studies is that inhibition of luminal epithelial proliferation with tamoxifen or pure antiestrogens or by preventing ovarian steroid secretion should be an effective strategy for the prevention of breast cancer. In addition, we may be able to predict the risk of breast cancer in an individual by measuring the intrinsic estrogen sensitivity of her breast epithelium. Finally, study of the paracrine mechanisms of growth control in the normal human breast may provide new, more specific, therapeutic targets for breast cancer prevention.
Affiliation:
Clinical Research Department, Christie Hospital NHS Trust, Manchester. eanderson@picr.man.ac.uk
Citation:
Estrogen responsiveness and control of normal human breast proliferation. 1998, 3 (1):23-35 J Mammary Gland Biol Neoplasia
Journal:
Journal of Mammary Gland Biology and Neoplasia
Issue Date:
Jan-1998
URI:
http://hdl.handle.net/10541/92047
DOI:
10.1023/A:1018718117113
PubMed ID:
10819502
Type:
Article
Language:
en
ISSN:
1083-3021
Appears in Collections:
All Christie Publications ; All Paterson Institute for Cancer Research

Full metadata record

DC FieldValue Language
dc.contributor.authorAnderson, Elizabethen
dc.contributor.authorClarke, Robert Ben
dc.contributor.authorHowell, Anthonyen
dc.date.accessioned2010-02-12T16:32:40Z-
dc.date.available2010-02-12T16:32:40Z-
dc.date.issued1998-01-
dc.identifier.citationEstrogen responsiveness and control of normal human breast proliferation. 1998, 3 (1):23-35 J Mammary Gland Biol Neoplasiaen
dc.identifier.issn1083-3021-
dc.identifier.pmid10819502-
dc.identifier.doi10.1023/A:1018718117113-
dc.identifier.urihttp://hdl.handle.net/10541/92047-
dc.description.abstractOur understanding of the hormonal control of the proliferation of normal human breast epithelium is still surprisingly meager. However, the results of a number of recent studies have confirmed that estrogen is the major steroid mitogen for the luminal epithelial cell population (the usual targets for neoplastic transformation). Estrogen seemingly exerts its effects on cell division indirectly as there is complete dissociation between the population of luminal epithelial cells expressing the estrogen receptor (ER)4 and those that proliferate. We suggest that the ER-negative proliferating cells represent a precursor or stem cell population that differentiates to ER-containing, nonproliferative cells. In turn, these ER-positive cells act as 'estrogen sensors' and transmit positive or negative paracrine growth signals to the precursor cells depending on the prevailing hormonal environment. As yet there is no direct evidence supporting this hypothesis but we suggest ways in which it may be obtained. The implication of these studies is that inhibition of luminal epithelial proliferation with tamoxifen or pure antiestrogens or by preventing ovarian steroid secretion should be an effective strategy for the prevention of breast cancer. In addition, we may be able to predict the risk of breast cancer in an individual by measuring the intrinsic estrogen sensitivity of her breast epithelium. Finally, study of the paracrine mechanisms of growth control in the normal human breast may provide new, more specific, therapeutic targets for breast cancer prevention.en
dc.language.isoenen
dc.subjectOestrogenen
dc.subjectOestrogen Receptorsen
dc.subject.meshBreast-
dc.subject.meshCell Differentiation-
dc.subject.meshCell Division-
dc.subject.meshEstrogens-
dc.subject.meshFemale-
dc.subject.meshHumans-
dc.subject.meshReceptors, Estrogen-
dc.titleEstrogen responsiveness and control of normal human breast proliferation.en
dc.typeArticleen
dc.contributor.departmentClinical Research Department, Christie Hospital NHS Trust, Manchester. eanderson@picr.man.ac.uken
dc.identifier.journalJournal of Mammary Gland Biology and Neoplasiaen
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