Identification of the Mechanisms Underlying Antiestrogen Resistance: Breast Cancer Research Partnership Between FIU-UM Braman Family Breast Cancer Institute
Abstract
We have completed all proposed training and research project tasks, except a part of Task 4 of research project-related to tumorogenesis experiments. This will be completed during no-cost extension period. This research proposal had two primary objectives which were to (1) increase FIU investigators research expertise and competitive ability to succeed as independent breast cancer researchers; and (2) to execute research with the promise of identifying molecular causes of breast tumor resistance to anti-estrogen therapy. We proposed to investigate how reactive oxygen species (ROS)-induced redox signaling pathways in breast cancer cells may contribute to molecular mechanisms of antiestrogen resistance. Our hypothesis is that the conversion of breast tumors to a tamoxifen-resistant phenotype is associated with a progressive shift towards a pro-oxidant environment of cells as a result of oxidative stress. We postulate that excess ROS levels induce both CDC25A and change p27 phosphorylation promoting the loss of its inhibitory function and leading to antiestrogen resistance. We will investigate whether reducing the oxidative environment of breast cancer cells will restore the anti-proliferative action of tamoxifen and other antiestrogens by repressing CDC25A and altering p27 phosphorylation and restoring p27 function.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2011
- Accession Number
- ADA549249
Entities
People
- Deodutta Roy
Organizations
- Florida International University