In Breast Cancer: Cellular and Molecular Biology [Kluwer Academic Pub-
lishers, 1988], we tried to present an introduction to the emerging
basic studies on steroid receptors, oncogenes, and growth factors in the
regulation of normal and malignant mammary epithelium. The response to
this volume was superb, indicating a tremendous interest in basic growth
regulatory mechanisms governing breast cancer and controlling its
malignant progres- sion. In the two years since its publication, much
new and exciting in- formation has been published and the full interplay
of regulatory mechanisms is now beginning to emerge. We have divided
this book into four sections that we hope will unify important concepts
and help to crystallize areas of consensus and/or disagreement among a
diverse group of basic and clinical scientists working on the disease.
The first section is devoted to studies on oncogenes, antioncogenes,
proliferation, and tumor prognosis. The first chapter, by Sunderland and
McGuire, introduces the characteristics of breast cancer as studied by
patho- logists to establish prognostic outcome. Of particular interest
is a new proto- oncogene called HER-2 (or neu), which is rapidly
becoming accepted as a valuable new tumor marker of poor prognosis. The
second chapter, by Lee Bookstein and Lee, introduces the best known
antioncogene, the retinoblas- toma antioncogene, whose expression is
sometimes lost in breast cancer. Malignant progression appears to be
influenced by the balance of proto- oncogene and antioncogene
expression.