University of Pittsburgh Pittsburgh, Pennsylvania
Professor of Pharmacology and Chemical Biology Director of Education, Women’s Cancer Research Center Magee Women’s Research Institute University of Pittsburgh Cancer Institute
Understanding the biology of invasive lobular carcinoma, a common but understudied form of breast cancer.
Invasive lobular carcinoma (ILC) is a type of invasive breast cancer that originates in the milk-producing glands of the breast called lobules and accounts for 10 to 15 percent of diagnoses. The key difference between ILC and invasive ductal cancer (IDC), is the loss of E-cadherin, a protein that is present on the surface of cells and mediates attachment to other cells. How this molecular hallmark of ILC drives disease function is still an open research question.
The team has developed an innovative new laboratory model in an attempt to “switch” an ILC tumor into an IDC tumor by restoring expression. In doing so, the team aims to identify characteristics in ILC that are driven by changes other than E-cadherin levels. Preliminary results indicate that overexpression of E-cadherin in ILC alone is not sufficient to “switch” subtype, implying there may be additional factors that drive biological and clinical differences between the two. Further, they have also discovered key non-genetic changes that are different between ILC and IDC.
In the coming year, the team will finalize their analysis of the E-cadherin expressing ILC models and share the findings with the larger research community. They will expand their analysis on the non-genetic differences they discovered which may lead to improved standardization of ILC diagnosis and identification of a drug target for ILC.
Steffi Oesterreich, PhD is Professor of Pharmacology and Chemical Biology and Director of Education, Women’s Cancer Research Center at the University of Pittsburgh. The main interest of Dr. Oesterreich’s research is to further our understanding of hormone action in women’s cancer for improved diagnosis and endocrine treatment. Her studies have focused on breast cancer and in receptor action in ovarian cancer. Her lab studies how the estrogen receptor (ER) functions, how its activity is regulated by diverse signaling pathways and through coregulator proteins, and how these mechanisms are perturbed in cancer cells. The Oesterreich lab is interested in novel concepts of ER action, such as its role in repression of gene transcription and its role in epigenetic marks in the genome. Her lab also has a strong interest in situ and invasive lobular disease, with a focus on estrogen and antiestrogen response. In her role as Director of Training in the Women’s Cancer Research Center, she is interested in providing outstanding training opportunities to the next generation of women’s cancer researchers.
2011
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