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Wandzioch E, Pusey M, Werda A, Bail S, Bhaskar A, Nestor M, Yang JJ, Rice LM. PME-1 Modulates Protein Phosphatase 2A Activity to Promote the Malignant Phenotype of Endometrial Cancer Cells. Cancer Res 2014; 74:4295-305. [DOI: 10.1158/0008-5472.can-13-3130] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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2
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Bai JX, Yan B, Zhao ZN, Xiao X, Qin WW, Zhang R, Jia LT, Meng YL, Jin BQ, Fan DM, Wang T, Yang AG. Tamoxifen represses miR-200 microRNAs and promotes epithelial-to-mesenchymal transition by up-regulating c-Myc in endometrial carcinoma cell lines. Endocrinology 2013; 154:635-45. [PMID: 23295740 DOI: 10.1210/en.2012-1607] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Although tamoxifen (TAM), a selective estrogen receptor modulator, has been widely used in the treatment of hormone-responsive breast cancer, its estrogen-like effect increases the risk of endometrial cancer. However, the molecular mechanisms of TAM-induced endometrial carcinoma still remain unclear. In this report, we explored the role of microRNAs (miRNAs) in TAM-induced epithelial-mesenchymal transition (EMT) in ECC-1 and Ishikawa endometrial cancer cell lines and found miR-200 is involved in this process via the regulation of c-Myc. When treated with TAM, ECC-1 and Ishikawa cells were characterized by higher invasiveness and motility and underwent EMT. miR-200, a miRNA family with tumor suppressive functions in a wide range of cancers, was found reduced in response to TAM treatment. Consistent with zinc finger E-box binding homeobox 2, which was confirmed as a direct target of miR-200b in endometrial cancer cell lines, some other key factors of EMT such as Snail and N-cadherin increased, whereas E-cadherin decreased in the TAM-treated cells, contributing to TAM-induced EMT in these endometrial cancer cells. In addition, we showed that c-Myc directly binds to and represses the promoter of miR-200 miRNAs, and its up-regulation in TAM-treated endometrial cancer cells leads to the down-regulation of miR-200 and eventually to EMT. Collectively, our data suggest that TAM can repress the miR-200 family and induce EMT via the up-regulation of c-Myc in endometrial cancer cells. These findings describe a possible mechanism of TAM-induced EMT in endometrial cancer and provide a potential new therapeutic strategy for it.
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Affiliation(s)
- Jiu-Xu Bai
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an 710032, China
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Pandya K, Meeke K, Clementz AG, Rogowski A, Roberts J, Miele L, Albain KS, Osipo C. Targeting both Notch and ErbB-2 signalling pathways is required for prevention of ErbB-2-positive breast tumour recurrence. Br J Cancer 2011; 105:796-806. [PMID: 21847123 PMCID: PMC3171020 DOI: 10.1038/bjc.2011.321] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Revised: 07/12/2011] [Accepted: 07/18/2011] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND We reported that Notch-1, a potent breast oncogene, is activated in response to trastuzumab and contributes to trastuzumab resistance in vitro. We sought to determine the preclinical benefit of combining a Notch inhibitor (γ-secretase inhibitor (GSI)) and trastuzumab in both trastuzumab-sensitive and trastuzumab-resistant, ErbB-2-positive, BT474 breast tumours in vivo. We also studied if the combination therapy of lapatinib plus GSI can induce tumour regression of ErbB-2-positive breast cancer. METHODS We generated orthotopic breast tumour xenografts from trastuzumab- or lapatinib-sensitive and trastuzumab-resistant BT474 cells. We investigated the antitumour activities of two distinct GSIs, LY 411 575 and MRK-003, in vivo. RESULTS Our findings showed that combining trastuzumab plus a GSI completely prevented (MRK-003 GSI) or significantly reduced (LY 411 575 GSI) breast tumour recurrence post-trastuzumab treatment in sensitive tumours. Moreover, combining lapatinib plus MRK-003 GSI showed significant reduction of tumour growth. Furthermore, a GSI partially reversed trastuzumab resistance in resistant tumours. CONCLUSION Our data suggest that a combined inhibition of Notch and ErbB-2 signalling pathways could decrease recurrence rates for ErbB-2-positive breast tumours and may be beneficial in the treatment of recurrent trastuzumab-resistant disease.
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MESH Headings
- Amyloid Precursor Protein Secretases/antagonists & inhibitors
- Amyloid Precursor Protein Secretases/therapeutic use
- Animals
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized
- Breast Neoplasms/drug therapy
- Breast Neoplasms/genetics
- Breast Neoplasms/pathology
- Breast Neoplasms/prevention & control
- Cell Line, Tumor
- Cyclic S-Oxides/pharmacology
- Drug Resistance, Neoplasm
- Female
- Gene Targeting
- Genes, erbB
- Genes, erbB-2
- Humans
- Lapatinib
- Mice
- Mice, Nude
- Neoplasm Transplantation
- Quinazolines/administration & dosage
- Receptor, ErbB-2/metabolism
- Receptors, Notch/antagonists & inhibitors
- Receptors, Notch/genetics
- Recurrence
- Signal Transduction/drug effects
- Thiadiazoles/pharmacology
- Trastuzumab
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Affiliation(s)
- K Pandya
- Molecular Biology Program, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
| | - K Meeke
- Oncology Institute, Stritch School of Medicine at Loyola University Medical Center, 2160 South First Avenue, Maywood, IL 60153, USA
| | - A G Clementz
- Molecular and Cellular Biochemistry Program, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
| | - A Rogowski
- Molecular Biology Program, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
| | - J Roberts
- Oncology Institute, Stritch School of Medicine at Loyola University Medical Center, 2160 South First Avenue, Maywood, IL 60153, USA
| | - L Miele
- University of Mississippi Cancer Institute, 350 Woodrow Wilson Drive, Suite 600, Jackson, MS 39213, USA
| | - K S Albain
- Department of Medicine, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
| | - C Osipo
- Molecular Biology Program, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
- Oncology Institute, Stritch School of Medicine at Loyola University Medical Center, 2160 South First Avenue, Maywood, IL 60153, USA
- Molecular and Cellular Biochemistry Program, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
- Department of Pathology, 2160 South First Avenue, Maywood, IL 60153, USA
- Department of Microbiology and Immunology, 2160 South First Avenue, Maywood, IL 60153, USA
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Ibrahim IT, Amin AM, El-Azony KM. Preparation of radioiodo-metoprolol and its biological evaluation as a possible cardiac imaging agent. RADIOCHEMISTRY 2010. [DOI: 10.1134/s1066362210020165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Lin SL, Yan LY, Liang XW, Wang ZB, Wang ZY, Qiao J, Schatten H, Sun QY. A novel variant of ER-alpha, ER-alpha36 mediates testosterone-stimulated ERK and Akt activation in endometrial cancer Hec1A cells. Reprod Biol Endocrinol 2009; 7:102. [PMID: 19775474 PMCID: PMC2761922 DOI: 10.1186/1477-7827-7-102] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2009] [Accepted: 09/24/2009] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Endometrial cancer is one of the most common gynecologic malignancies and its incidence has recently increased. Experimental and epidemiological data support that testosterone plays an important role in the pathogenesis of endometrial cancer, but the underlying mechanism has not been fully understood. Recently, we identified and cloned a variant of estrogen receptor (ER) alpha, ER-alpha36. The aim of the present study was to investigate the role of ER-alpha36 in testosterone carcinogenesis. METHODS The cellular localization of ER-alpha36 was determined by immunofluorescence. Hec1A endometrial cancer cells (Hec1A/V) and Hec1A cells with siRNA knockdown of ER-alpha36 (Hec1A/RNAi) were treated with testosterone, ERK and Akt phosphorylation was assessed by Western blot analysis. Furthermore, the kinase inhibitors U0126 and LY294002 and the aromatase inhibitor letrozole were used to elucidate the pathway underlying testosterone-induced activities. RESULTS Immunofluorescence shows that ER-alpha36 was localized on the plasma membrane of the both ER-alpha- and androgen receptor-negative endometrial cancer Hec1A cells. Testosterone induced ERK and Akt phosphorylation, which could be abrogated by ER-alpha 36 shRNA knockdown or the kinase inhibitors, U0126 and LY294002, and the aromatase inhibitor letrozole. CONCLUSION Testosterone induces ERK and Akt phosphorylation via the membrane-initiated signaling pathways mediated by ER-alpha36, suggesting a possible involvement of ER-alpha 36 in testosterone carcinogenesis.
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Affiliation(s)
- Sheng-Li Lin
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Graduate School, Chinese Academy of Sciences, Beijing, China
| | - Li-Ying Yan
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Xing-Wei Liang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Zhen-Bo Wang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Graduate School, Chinese Academy of Sciences, Beijing, China
| | - Zhao-Yi Wang
- Department of Medical Microbiology and Immunology, Creighton University Medical School, Omaha, USA
| | - Jie Qiao
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO 65211, USA
| | - Qing-Yuan Sun
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
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Jordan VC. The 38th David A. Karnofsky lecture: the paradoxical actions of estrogen in breast cancer--survival or death? J Clin Oncol 2008; 26:3073-82. [PMID: 18519949 DOI: 10.1200/jco.2008.17.5190] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
During the first David A. Karnofsky Award lecture entitled "Thoughts on Chemical Therapy" in 1970, Sir Alexander Haddow commented about the dramatic regressions observed with estrogen in some breast cancers in postmenopausal women, but regrettably the mechanism was unknown. He was concerned that a cancer-specific target would remain elusive, without tests to predict response to therapy. At that time, I was conducting research for my PhD on an obscure group of estrogen derivatives called nonsteroidal antiestrogens. Antiestrogens had failed to fulfill their promise as postcoital contraceptives and were unlikely to be developed further by the pharmaceutical industry. In 1972, that perspective started to change and ICI 46,474 was subsequently reinvented as the first targeted therapy for breast cancer. The scientific strategy of targeting the estrogen receptor (ER) in the tumor, treating patients with long-term adjuvant therapy, examining active metabolites, and considering chemoprevention all translated through clinical trials to clinical practice during the next 35 years. Hundreds of thousands of women now have enhanced survivorship after their diagnosis of ER-positive breast cancer. However, it was the recognition of selective ER modulation (SERM) that created a new dimension in therapeutics. Nonsteroidal antiestrogens selectively turn on or turn off estrogen target tissues throughout the body. Patient care was immediately affected by the recognition in the laboratory that tamoxifen would potentially increase the growth of endometrial cancer during long-term adjuvant therapy. At that time, a failed breast cancer drug, keoxifene, was found to maintain bone density of rats (estrogenic action) while simultaneously preventing mammary carcinogenesis (antiestrogenic action). Perhaps a SERM used to prevent osteoporosis could simultaneously prevent breast cancer? Keoxifene was renamed raloxifene and became the first SERM for the treatment and prevention of osteoporosis as well as the prevention of breast cancer, but without an increase in endometrial cancer. There the story might have ended had the study of antihormone resistance not revealed a vulnerability of cancer cells that could be exploited in the clinic. The evolution of antihormone resistance over years of therapy reconfigures the survival mechanism of the breast cancer cell, so estrogen no longer is a survival signal but a death signal. Remarkably, remaining tumor tissue is again responsive to continuing antihormone therapy. This new discovery is currently being evaluated in clinical trials but it also solves the mystery mechanism of chemical therapy with estrogen noted by Haddow in the first Karnofsky lecture.
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Affiliation(s)
- V Craig Jordan
- Medical Sciences, Fox Chase Cancer Center, 333 Cottman Ave, Philadelphia, PA 19111, USA.
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Gründker C, Günthert AR, Emons G. Hormonal heterogeneity of endometrial cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2008; 630:166-88. [PMID: 18637491 DOI: 10.1007/978-0-387-78818-0_11] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Endometrial cancer is the most common malignant tumor of the female genital tract in the developed world. Increasing evidence suggests that the majority of cases can be divided into two different types ofendometrial cancer based on clinico-pathological and molecular characteristics. Type I is associated with an endocrine milieu of estrogen predominance. These tumors are ofendometroid histology and develop from endometrial hyperplasia. They have good prognosis and are sensitive to endocrine treatment. Type II endometrial cancers are not associated with a history of unopposed estrogens and develop from the atrophic endometrium of elderly women. Mainly, they are of serous papillary or clear cell morphology, have a poor prognosis and do not react to endocrine treatment. Both types of endometrial cancer probably differ markedly with regard to the molecular mechanisms of transformation. The transition from normal endometrium to a malignant tumor is thought to involve a stepwise accumulation of alterations in cellular mechanisms leading to dysfunctional cell growth. This chapter reviews the current knowledge of the molecular mechanisms commonly associated with development of type I and type II endometrial cancer.
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Affiliation(s)
- Carsten Gründker
- Department of Gynecology and Obstetrics, Georg-August-University, Göttingen, Germany
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Sengupta S, Jordan VC. Selective Estrogen Modulators as an Anticancer Tool:. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2008; 630:206-19. [DOI: 10.1007/978-0-387-78818-0_13] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Craig Jordan V, Lewis-Wambi J, Kim H, Cunliffe H, Ariazi E, Sharma CGN, Shupp HA, Swaby R. Exploiting the apoptotic actions of oestrogen to reverse antihormonal drug resistance in oestrogen receptor positive breast cancer patients. Breast 2007; 16 Suppl 2:S105-13. [PMID: 17719781 PMCID: PMC2707932 DOI: 10.1016/j.breast.2007.07.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The ubiquitous application of selective oestrogen receptor modulators (SERMs) and aromatase inhibitors for the treatment and prevention of breast cancer has created a significant advance in patient care. However, the consequence of prolonged treatment with antihormonal therapy is the development of drug resistance. Nevertheless, the systematic description of models of drug resistance to SERMs and aromatase inhibitors has resulted in the discovery of a vulnerability in tumour homeostasis that can be exploited to improve patient care. Drug resistance to antihormones evolves, so that eventually the cells change to create novel signal transduction pathways for enhanced oestrogen (GPR30+OER) sensitivity, a reduction in progesterone receptor production and an increased metastatic potential. Most importantly, antihormone resistant breast cancer cells adapt with an ability to undergo apoptosis with low concentrations of oestrogen. The oestrogen destroys antihormone resistant cells and reactivates sensitivity to prolonged antihormonal therapy. We have initiated a major collaborative program of genomics and proteomics to use our laboratory models to map the mechanism of subcellular survival and apoptosis in breast cancer. The laboratory program is integrated with a clinical program that seeks to determine the minimum dose of oestrogen necessary to create objective responses in patients who have succeeded and failed two consecutive antihormonal therapies. Once our program is complete, the new knowledge will be available to translate to clinical care for the long-term maintenance of patients on antihormone therapy.
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Affiliation(s)
- V Craig Jordan
- Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA.
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