Our overall objective is to dissect the role of the steroid receptor coactivator (SRC-1) family in governing the tissue-selective physiological functions of estrogen (E) and progesterone (P) as mediated through their cognate nuclear receptors, ER and PR, respectively. Our working hypothesis is that ER and PR act in the female reproductive system and mammary gland via obligatory interactions with SRC family members, which determine their actions in a developmental-, tissue-, gene-, receptor-, and ligand-specific manner. This hypothesis will be tested in the following Specific Aims:
Specific Aim 1 will employ conditional murine transgenic approaches to selectively increase SRC expression to disclose the involvement of each SRC in a given ER- and/or PR-mediated physiological response. To address the proposed functional synergy between SRC-1 and SRC-2 in the adult, Specific Aim 2 will utilize CRE/loxP engineering strategies to conditionally ablate SRC-2 function in the SRC-1 knockout mouse; the SRC-1/SRC-2 double knockout results in early postnatal lethality.
Specific Aim 3 will use existing PRA, PRB and SRC knockout mouse models to define the SRC contributions to the tissue-selective effects elicited by these PR isoforms in vivo.
This aim will also employ the three SRC knockout mouse models (and combinations thereof) to address the fundamental basis of the specific effects of natural ligands and selective receptor modulators (SRMs).
Specific Aim 4 will co-opt state-of-the-art ultrastructural, histological, and molecular approaches to phenotypically characterize the animal models described in this proposal. These studies are essential not only to further understand the tissue-specific biology of SRC family members, but will pave the way for a greater comprehension of the mode of action of SRMs that will improve prospects for their therapeutic application in the myriad of endocrine disorders in which nuclear receptors, and by association SRCs, are implicated.

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
Research Project (R01)
Project #
2R01HD007857-31
Application #
6469949
Study Section
Biochemical Endocrinology Study Section (BCE)
Program Officer
Yoshinaga, Koji
Project Start
1977-05-01
Project End
2007-04-30
Budget Start
2002-05-01
Budget End
2003-04-30
Support Year
31
Fiscal Year
2002
Total Cost
$549,304
Indirect Cost
Name
Baylor College of Medicine
Department
Anatomy/Cell Biology
Type
Schools of Medicine
DUNS #
074615394
City
Houston
State
TX
Country
United States
Zip Code
77030
Panigrahi, Anil K; Foulds, Charles E; Lanz, Rainer B et al. (2018) SRC-3 Coactivator Governs Dynamic Estrogen-Induced Chromatin Looping Interactions during Transcription. Mol Cell 70:679-694.e7
Szwarc, Maria M; Hai, Lan; Gibbons, William E et al. (2018) Retinoid signaling controlled by SRC-2 in decidualization revealed by transcriptomics Reproduction 156:387-395
Dasgupta, Subhamoy; Rajapakshe, Kimal; Zhu, Bokai et al. (2018) Metabolic enzyme PFKFB4 activates transcriptional coactivator SRC-3 to drive breast cancer. Nature 556:249-254
Szwarc, Maria M; Kommagani, Ramakrishna; Putluri, Vasanta et al. (2018) Steroid Receptor Coactivator-2 Controls the Pentose Phosphate Pathway through RPIA in Human Endometrial Cancer Cells. Sci Rep 8:13134
Gates, Leah A; Gu, Guowei; Chen, Yue et al. (2018) Proteomic profiling identifies key coactivators utilized by mutant ER? proteins as potential new therapeutic targets. Oncogene 37:4581-4598
Rohira, Aarti D; Yan, Fei; Wang, Lei et al. (2017) Targeting SRC Coactivators Blocks the Tumor-Initiating Capacity of Cancer Stem-like Cells. Cancer Res 77:4293-4304
Zhu, Bokai; Zhang, Qiang; Pan, Yinghong et al. (2017) A Cell-Autonomous Mammalian 12 hr Clock Coordinates Metabolic and Stress Rhythms. Cell Metab 25:1305-1319.e9
Han, Sang Jun; Begum, Khurshida; Foulds, Charles E et al. (2016) The Dual Estrogen Receptor ? Inhibitory Effects of the Tissue-Selective Estrogen Complex for Endometrial and Breast Safety. Mol Pharmacol 89:14-26
Lonard, David M; Xu, Jianming; O'Malley, Bert W (2015) Bufalin is a steroid receptor coactivator inhibitor-response. Cancer Res 75:1157
Han, Sang Jun; Jung, Sung Yun; Wu, San-Pin et al. (2015) Estrogen Receptor ? Modulates Apoptosis Complexes and the Inflammasome to Drive the Pathogenesis of Endometriosis. Cell 163:960-74

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