Endometrial cancer affects more than 40,000 women per year. The incidence of endometrial cancer is rising as life expectancy increases and as key risk factors, including obesity, becomes more prevalent. Chronic exposure to estrogen with a lack of opposing progesterone is highly associated with endometrial carcinoma. Progesterone is a hormone that antagonizes the growth-promoting properties of estrogen in the uterus. Progesterone therapy has been shown to be effective in preventing endometrial cancer as well as controlling growth of the endometrium. However, the effectiveness of progestins for women with endometrial cancer is less clear. Progesterone functions through its receptor (PR), and regulates the expression of genes. For PR to do this, it must be properly phosphorylated at specific residues. Furthermore, its transcriptional function is dependent on the cofactors that are available. Interestingly, up to 80% of endometrial cancers carry a PTEN mutation. Given the role of PTEN to negatively regulate the PI3K/AKT pathway, inactivation of this gene results in hyper activated AKT, which contributes to enhanced proliferation and survival. In the proposed project, we will study the post translational modification of PR, its transcriptional function and the physiological role in the context of hyper activated AKT. This will be done using the most current technologies, using in vitro and in vivo models to study tumor behavior in response to progesterone and inhibitors of the AKT pathway. The information generated from this study may contribute towards the development of combinatorial therapies using hormones and inhibitors of the AKT pathway.

Public Health Relevance

Progestin therapy is an attractive option for women with endometrial adenocarcinoma who want to preserve fertility or cannot undergo surgery. This option is vital since risk factors for endometrial cancer such as obesity are on the rise and are affecting younger women. This project focuses on understanding how the AKT pathway, which is a pathway that is overactive due to a common mutation in endometrial cancer, which affects progesterone receptor action. This is important to understand since only a subset of women with endometrial cancer responds to progestins. The data generated from this project will contribute towards improving progestin therapy in these progestin resistant women.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
1R01CA155513-01A1
Application #
8297282
Study Section
Molecular Oncogenesis Study Section (MONC)
Program Officer
Sathyamoorthy, Neeraja
Project Start
2012-06-04
Project End
2017-03-31
Budget Start
2012-06-04
Budget End
2013-03-31
Support Year
1
Fiscal Year
2012
Total Cost
$315,396
Indirect Cost
$107,896
Name
Northwestern University at Chicago
Department
Obstetrics & Gynecology
Type
Schools of Medicine
DUNS #
005436803
City
Chicago
State
IL
Country
United States
Zip Code
60611
Saygin, Caner; Wiechert, Andrew; Rao, Vinay S et al. (2017) CD55 regulates self-renewal and cisplatin resistance in endometrioid tumors. J Exp Med 214:2715-2732
Winder, Abigail; Unno, Kenji; Yu, Yanni et al. (2017) The allosteric AKT inhibitor, MK2206, decreases tumor growth and invasion in patient derived xenografts of endometrial cancer. Cancer Biol Ther 18:958-964
Peevey, Joseph F; Seagle, Brandon-Luke L; Maniar, Kruti P et al. (2017) Association of body mass index with ER, PR and 14-3-3? expression in tumor and stroma of type I and type II endometrial carcinoma. Oncotarget 8:42548-42559
Lee, I I; Maniar, K; Lydon, J P et al. (2016) Akt regulates progesterone receptor B-dependent transcription and angiogenesis in endometrial cancer cells. Oncogene 35:5191-201
Pineda, M J; Lu, Z; Cao, D et al. (2015) Influence of Cancer-Associated Endometrial Stromal Cells on Hormone-Driven Endometrial Tumor Growth. Horm Cancer 6:131-41
Mittal, Navdha; Malpani, Saurabh; Dyson, Matthew et al. (2014) Fenretinide: a novel treatment for endometrial cancer. PLoS One 9:e110410
Lee, Irene I; Kim, J Julie (2014) Influence of AKT on progesterone action in endometrial diseases. Biol Reprod 91:63
Unno, Kenji; Ono, Masanori; Winder, Abigail D et al. (2014) Establishment of human patient-derived endometrial cancer xenografts in NOD scid gamma mice for the study of invasion and metastasis. PLoS One 9:e116064
Kim, J Julie; Kurita, Takeshi; Bulun, Serdar E (2013) Progesterone action in endometrial cancer, endometriosis, uterine fibroids, and breast cancer. Endocr Rev 34:130-62
Pant, Alok; Lee, Irene I; Lu, Zhenxiao et al. (2012) Inhibition of AKT with the orally active allosteric AKT inhibitor, MK-2206, sensitizes endometrial cancer cells to progestin. PLoS One 7:e41593