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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Tan, Ting Wang, Lie Wang, Bing |
| Description | Author Affiliation: Tan T ( Department of Breast Surgery, Fuzhou General Hospital of Nanjing Military Region, Fuzhou, Fujian 350025, P.R. China.); Wang L ( Department of General Surgery, Fuzhou General Hospital of Nanjing Military Region, Fuzhou, Fujian 350025, P.R. China.); Wang B ( Department of General Surgery, Fuzhou General Hospital of Nanjing Military Region, Fuzhou, Fujian 350025, P.R. China.) |
| Abstract | Excessive local estrogen production in the breast promotes estrogen-dependent breast cancer. Aromatase is a key enzyme in estrogen biosynthesis. Aromatase inhibitors used in the treatment of breast cancer are very effective, but indiscriminately reduce estrogen synthesis in all tissues, causing major sideeffects. It is thus desirable to develop inhibitors that selectively block aromatase and estrogen production in breast cancer. To this end, it is important to identify the mechanisms by which aromatase is activated in the tumor microenvironment. Prostaglandin E2 (PGE2) and collagen are two important factors in the tumor microenvironment, which contribute to tumor development and progression. In this study, we show that collageninduced aromatase expression in adipose stromal cells (ASCs) was significantly reduced by inhibitors of phosphatidylinositide 3kinase (PI3K), IκB kinase (IKK), mitogenactivated protein kinase kinase (MEK), cJun NH2terminal kinase (JNK), protein kinase A (PKA), and by the knockdown of the JunB and AKT2 genes. In addition, PGE2induced aromatase expression was significantly inhibited by inhibitors of IKK, MEK, JNK, p38 and PKA. These results indicate that the PI3K/AKT/IKK and the mitogenactivated protein (MAP) kinase pathways are involved in collagen and PGE2induced aromatase expression, and also suggest that collagen and PGE2induced signaling pathways may crosstalk in regulating aromatase expression. This study enhances our understanding on the mechanism of regulation of aromatase expression by collagen and PGE2. Furthermore, this study provides a theoretical foundation for the development of specific inhibitors of aromatase by exploiting the signaling pathways identified herein in the context of breast cancer. |
| ISSN | 17912997 |
| e-ISSN | 17913004 |
| Journal | Molecular Medicine Reports |
| Issue Number | 3 |
| Volume Number | 12 |
| Language | English |
| Publisher | Spandidos Publications |
| Publisher Date | 2015-09-01 |
| Publisher Place | Greece |
| Access Restriction | Open |
| Subject Keyword | Aromatase Metabolism Dinoprostone Physiology Map Kinase Signaling System Stromal Cells Enzymology Adipose Tissue, White Pathology Genetics Breast Neoplasms Drug Therapy Cells, Cultured Enzyme Induction I-kappa B Kinase Isoquinolines Pharmacology Molecular Targeted Therapy Phosphatidylinositol 3-kinases Proto-oncogene Proteins C-akt Sulfonamides Discipline Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Biochemistry Molecular Biology Cancer Research Molecular Medicine Oncology |
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