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Altwegg KA, Pratap UP, Liu Z, Liu J, Sanchez JR, Yang X, Ebrahimi B, Panneerdoss DM, Li X, Sareddy GR, Viswanadhapalli S, Rao MK, Vadlamudi RK. Targeting PELP1 oncogenic signaling in TNBC with the small molecule inhibitor SMIP34. Breast Cancer Res Treat 2023; 200:151-162. [PMID: 37199805 PMCID: PMC10224866 DOI: 10.1007/s10549-023-06958-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 04/21/2023] [Indexed: 05/19/2023]
Abstract
PURPOSE Triple-negative breast cancer (TNBC) is the most aggressive subtype of breast cancer. Oncogenic PELP1 is frequently overexpressed in TNBC, and it has been demonstrated that PELP1 signaling is essential for TNBC progression. The therapeutic utility of targeting PELP1 in TNBC, however, remains unknown. In this study, we investigated the effectiveness of SMIP34, a recently developed PELP1 inhibitor for the treatment of TNBC. METHODS To ascertain the impact of SMIP34 treatment, we used seven different TNBC models for testing cell viability, colony formation, invasion, apoptosis, and cell cycle analysis. Western blotting and RT-qPCR were used to determine the mechanistic insights of SMIP34 action. Using xenograft and PDX tumors, the ability of SMIP34 in suppressing proliferation was examined both ex vivo and in vivo. RESULTS TNBC cells' viability, colony formation, and invasiveness were all decreased by SMIP34 in in vitro cell-based assays, while apoptosis was increased. SMIP34 treatment promoted the degradation of PELP1 through the proteasome pathway. RT-qPCR analyses confirmed that SMIP34 treatment downregulated PELP1 target genes. Further, SMIP34 treatment substantially downregulated PELP1 mediated extranuclear signaling including ERK, mTOR, S6 and 4EBP1. Mechanistic studies confirmed downregulation of PELP1 mediated ribosomal biogenesis functions including downregulation of cMyc and Rix complex proteins LAS1L, TEX-10, and SENP3. The proliferation of TNBC tumor tissues was decreased in explant experiments by SMIP34. Additionally, SMIP34 treatment markedly decreased tumor progression in both TNBC xenograft and PDX models. CONCLUSIONS Together, these findings from in vitro, ex vivo, and in vivo models show that SMIP34 may be a useful therapeutic agent for inhibiting PELP1 signaling in TNBC.
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Affiliation(s)
- Kristin A Altwegg
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
- Mays Cancer Center, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Uday P Pratap
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Zexuan Liu
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, People's Republic of China
| | - Junhao Liu
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, People's Republic of China
| | - John R Sanchez
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Xue Yang
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
- Department of Obstetrics and Gynecology, Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, People's Republic of China
| | - Behnam Ebrahimi
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
- Mays Cancer Center, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Durga Meenakshi Panneerdoss
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Xiaonan Li
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Gangadhara R Sareddy
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
- Mays Cancer Center, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Suryavathi Viswanadhapalli
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
- Mays Cancer Center, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Manjeet K Rao
- Greehey Children's Cancer Research Institute, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
- Mays Cancer Center, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Ratna K Vadlamudi
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, TX, 78229, USA.
- Mays Cancer Center, University of Texas Health San Antonio, San Antonio, TX, 78229, USA.
- Audie L. Murphy Division, South Texas Veterans Health Care System, San Antonio, TX, 78229, USA.
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PELP1 is overexpressed in lung cancer and promotes tumor cell malignancy and resistance to tyrosine kinase inhibitor drug. Pathol Res Pract 2022; 237:154065. [PMID: 35969940 DOI: 10.1016/j.prp.2022.154065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 08/04/2022] [Accepted: 08/07/2022] [Indexed: 12/24/2022]
Abstract
Proline, glutamate, and leucine-rich protein 1 (PELP1) are involved in several cancers, but little is known about PELP1 in lung cancer. In this study, PELP1 expression was evaluated in 305 lung cancer (NSCLC) specimens to explore the role of PELP1 in lung cancer. After silencing PELP1, the proliferation, migration, invasion of tumor cells, PELP1 in relation to cell cycle and signaling pathways were evaluated, and whole-genome exons were analyzed. PELP1 is overexpressed in lung cancer, PELP1 expression correlated with squamous carcinoma, smoking, and wild-type EGFR status (all Ps<0.001) but associated with lung cancer-specific survival (P > 0.05). Silencing significantly inhibited lung cancer cell proliferation, migration, and invasion (P < 0.05) and promoted high sensitivity of lung cancer cells to tyrosine kinase inhibitor (TKI) gefitinib. PELP1-silenced cells showed downregulated phosphorylated MAPK, cyclinD1, CDK2, and upregulated RB (P < 0.05) but no change in AKT. In PELP1-silenced lung cancer cells, 140 genes were upregulated, and 143 genes were downregulated. Furthermore, the number of T regulatory cell was higher in lung adenocarcinoma with pelp1 high-expression and pelp1 expression was negatively correlated with CD274 (PDL-1) and CTLA4. Therefore, PELP1 plays an important role in the malignant behavior of NSCLC and could be a potential therapeutic target.
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Liu Z, Altwegg KA, Liu J, Weintraub ST, Chen Y, Lai Z, Sareddy GR, Viswanadhapalli S, Vadlamudi RK. Global Genomic and Proteomic Analysis Identified Critical Pathways Modulated by Proto-Oncogene PELP1 in TNBC. Cancers (Basel) 2022; 14:cancers14040930. [PMID: 35205680 PMCID: PMC8924758 DOI: 10.3390/cancers14040930] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/09/2022] [Accepted: 02/11/2022] [Indexed: 12/12/2022] Open
Abstract
Simple Summary The proto-oncogene PELP1 is commonly overexpressed in many cancers including triple negative breast cancer (TNBC). In this study, we utilized global proteomic and RNA-seq approaches to elucidate the molecular mechanisms by which PELP1 contributes to the progression of TNBC. Global quantitative proteome analysis revealed that the oncogenic activities of PELP1 involve regulation of the expression of ribosomal proteins, as well as ribosomal regulatory complexes. RNA-seq studies discovered that PELP1 modulates the functions of c-Myc in TNBC, which is a known regulator of ribosomal proteins. Furthermore, TCGA-TNBC data confirmed PELP1 has high expression in TNBC, and this pattern exhibited a positive correlation with c-Myc and regulators of ribosomal proteins. Collectively, our studies suggest that PELP1 contributes to TNBC progression by modulation of ribosome biogenesis pathways. Abstract The PELP1 oncogene is commonly overexpressed in many cancers, including triple negative breast cancer (TNBC). However, the mechanisms by which PELP1 contributes to TNBC progression are not well understood. To elucidate these mechanisms, we generated CRISPR-Cas9 mediated PELP1 knockout TNBC cell lines, and alterations in the proteome were examined using global data-independent acquisition mass spectrometry (DIA-MS). Further mechanistic studies utilized shRNA knockdown, Western blotting, and RNA-seq approaches. TCGA data sets were utilized for determining the status of PELP1 in TNBC patient tumors and for examining its correlation with ribosomal proteins. Global DIA-MS studies revealed that 127 proteins are upregulated while 220 proteins are downregulated upon PELP1-KO. Bioinformatic analyses suggested that the oncogenic activities of PELP1 involve regulation of expression of ribosomal proteins and ribosomal complexes. RNA-seq studies further suggested PELP1 modulates the functions of transcription factor c-Myc in TNBC. TCGA data confirmed PELP1 has high expression in TNBC patient tumors, and this high expression pattern correlates with c-Myc, a regulator of ribosomal proteins. Collectively, our global approach studies suggest that PELP1 contributes to TNBC progression by modulation of cell cycle, apoptosis, and ribosome biogenesis pathways.
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Affiliation(s)
- Zexuan Liu
- Department of Obstetrics and Gynecology, UT Health San Antonio, San Antonio, TX 78229, USA; (Z.L.); (K.A.A.); (J.L.); (G.R.S.)
- Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Kristin A. Altwegg
- Department of Obstetrics and Gynecology, UT Health San Antonio, San Antonio, TX 78229, USA; (Z.L.); (K.A.A.); (J.L.); (G.R.S.)
- Mays Cancer Canter, UT Health San Antonio, San Antonio, TX 78229, USA
| | - Junhao Liu
- Department of Obstetrics and Gynecology, UT Health San Antonio, San Antonio, TX 78229, USA; (Z.L.); (K.A.A.); (J.L.); (G.R.S.)
- Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Susan T. Weintraub
- Department of Biochemistry and Structural Biology, UT Health San Antonio, San Antonio, TX 78229, USA;
| | - Yidong Chen
- Greehey Children’s Cancer Research Institute, UT Health San Antonio, San Antonio, TX 78229, USA; (Y.C.); (Z.L.)
- Department of Population Health Sciences, UT Health San Antonio, San Antonio, TX 78229, USA
| | - Zhao Lai
- Greehey Children’s Cancer Research Institute, UT Health San Antonio, San Antonio, TX 78229, USA; (Y.C.); (Z.L.)
- Department of Molecular Medicine, UT Health San Antonio, San Antonio, TX 78229, USA
| | - Gangadhara R. Sareddy
- Department of Obstetrics and Gynecology, UT Health San Antonio, San Antonio, TX 78229, USA; (Z.L.); (K.A.A.); (J.L.); (G.R.S.)
- Mays Cancer Canter, UT Health San Antonio, San Antonio, TX 78229, USA
| | - Suryavathi Viswanadhapalli
- Department of Obstetrics and Gynecology, UT Health San Antonio, San Antonio, TX 78229, USA; (Z.L.); (K.A.A.); (J.L.); (G.R.S.)
- Mays Cancer Canter, UT Health San Antonio, San Antonio, TX 78229, USA
- Correspondence: (S.V.); (R.K.V.); Tel.: +1-(210)-567-6244 (S.V.); +1-(210)-567-4921 (R.K.V.)
| | - Ratna K. Vadlamudi
- Department of Obstetrics and Gynecology, UT Health San Antonio, San Antonio, TX 78229, USA; (Z.L.); (K.A.A.); (J.L.); (G.R.S.)
- Mays Cancer Canter, UT Health San Antonio, San Antonio, TX 78229, USA
- Audie L. Murphy Division, South Texas Veterans Health Care System, San Antonio, TX 78229, USA
- Correspondence: (S.V.); (R.K.V.); Tel.: +1-(210)-567-6244 (S.V.); +1-(210)-567-4921 (R.K.V.)
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Zhang D, Dai J, Pan Y, Wang X, Qiao J, Sasano H, Zhao B, McNamara KM, Guan X, Liu L, Zhang Y, Chan MSM, Cao S, Liu M, Song S, Wang L. Overexpression of PELP1 in Lung Adenocarcinoma Promoted E 2 Induced Proliferation, Migration and Invasion of the Tumor Cells and Predicted a Worse Outcome of the Patients. Pathol Oncol Res 2021; 27:582443. [PMID: 34257530 PMCID: PMC8262236 DOI: 10.3389/pore.2021.582443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Accepted: 02/10/2021] [Indexed: 11/13/2022]
Abstract
The expression of Proline-, glutamic acid-, and leucine-rich protein 1 (PELP1) has been reported to be dysregulated in non-small cell lung carcinoma, especially in lung adenocarcinoma (LUAD). Therefore, we aimed to investigate the functional and prognostic roles of PELP1 in LUAD in this study. We first immunolocalized PELP1 in 76 cases of LUAD and 17 non-pathological or tumorous lung (NTL) tissue specimens and correlated the findings with the clinicopathological parameters of the patients. We then performed in vitro analysis including MTT, flow cytometry, wound healing, and transwell assays in order to further explore the biological roles of PELP1 in 17-β-estradiol (E2) induced cell proliferation, migration, and invasion of LUAD cells. We subsequently evaluated the prognostic significance of PELP1 in LUAD patients using the online survival analysis tool Kaplan-Meier Plotter. The status of PELP1 immunoreactivity in LUAD was significantly higher than that in the NTL tissues and significantly positively correlated with less differentiated features of carcinoma cells, positive lymph node metastasis, higher clinical stage as well as the status of ERα, ERβ, and PCNA. In vitro study did reveal that E2 promoted cell proliferation and migration and elevated PELP1 protein level in PELP1-high A549 and H1975 cells but not in PELP1-low H-1299 cells. Knock down of PELP1 significantly attenuated E2 induced cell proliferation, colony formation, cell cycle progress as well as migration and invasion of A549 and H1975 cells. Kaplan-Meier Plotter revealed that LUAD cases harboring higher PELP1 expression had significantly shorter overall survival. In summary, PELP1 played a pivotal role in the estrogen-induced aggressive transformation of LUAD and could represent adverse clinical outcome of the LUAD patients.
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Affiliation(s)
- Dongmei Zhang
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China
| | - Jiali Dai
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China.,Traditional Psychological Unit, The Third Hospital of Daqing, Daqing, China
| | - Yu Pan
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China
| | - Xiuli Wang
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China
| | - Juanjuan Qiao
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China
| | - Hironobu Sasano
- Department of Pathology, Tohoku University School of Medicine, Sendai, Japan
| | - Baoshan Zhao
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China
| | - Keely M McNamara
- Department of Pathology, Tohoku University School of Medicine, Sendai, Japan
| | - Xue Guan
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China
| | - Lili Liu
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China
| | - Yanzhi Zhang
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China
| | - Monica S M Chan
- Department of Pathology, Tohoku University School of Medicine, Sendai, Japan
| | - Shuwen Cao
- Department of Pathology, Daqing Oilfield General Hospital, Daqing, China
| | - Ming Liu
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China.,Department of Pathology, The Fifth Affiliated Hospital of Harbin Medical University, Daqing, China
| | - Sihang Song
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China
| | - Lin Wang
- Department of Pathology, Harbin Medical University-Daqing, Daqing, China
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5
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Pan Y, Wang X, Zhang Y, Qiao J, Sasano H, McNamara K, Zhao B, Zhang D, Fan Y, Liu L, Jia X, Liu M, Song S, Wang L. Estradiol-Induced MMP-9 Expression via PELP1-Mediated Membrane-Initiated Signaling in ERα-Positive Breast Cancer Cells. Discov Oncol 2020; 11:87-96. [PMID: 32037484 DOI: 10.1007/s12672-020-00380-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 01/27/2020] [Indexed: 02/08/2023] Open
Abstract
Proline-, glutamic acid-, leucine-rich protein 1 (PELP1) is a novel estrogen receptor (ER) coregulator, demonstrated distinctive characters from other ERα coregulators, and has been suggested to be involved in metastasis of several cancers. In ERα-positive breast cancer, PELP1 overexpression enhanced ruffles and filopodium-like structure stimulated by estradiol (E2) through extranuclear cell signaling transduction hereby increased cell motility. However, whether PELP1 is also involved in extracellular matrix remodeling of ERα-positive breast cancer cells is still unknown. In this study, we investigated the role of PELP1 in E2-induced MMP-9 expression and the underlined mechanism. The results demonstrated the following: E2-induced ERα-positive MCF-7 breast cancer cell MMP-9 mRNA and protein expression in a rapid response and concentration-dependent manner. Knocked down PELP1 significantly suppressed E2-induced MMP-9 expression. E2-bovine serum albumin (BSA), a large molecular membrane-impenetrable conjugate of E2, can also upregulate MMP-9 protein expression in MCF-7, and the action of E2-BSA can be abolished by PI3K inhibitor LY294002; treating MCF-7 simultaneously with PELP1-shRNA and LY294002 did not show synergetic inhibitory effect on E2-BSA-induced MMP-9 expression. Our results indicated that estrogen-induced MMP-9 expression in ER-positive breast cancer cells may be through PELP1-mediated PI3K/Akt signaling pathway.
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Affiliation(s)
- Yu Pan
- Department of Anatomy, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, 163319, Heilongjiang, China
| | - Xiuli Wang
- Department of Pathology and Pathophysiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, 163319, Heilongjiang, China
| | - Yanzhi Zhang
- Department of Pathology and Pathophysiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, 163319, Heilongjiang, China
| | - Juanjuan Qiao
- Department of Pathology and Pathophysiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, 163319, Heilongjiang, China
| | - Hironobu Sasano
- Department of Pathology, Tohoku University School of Medicine of Medicine, Sendai, Miyagi, 3600107, Japan
| | - Keely McNamara
- Department of Pathology, Tohoku University School of Medicine of Medicine, Sendai, Miyagi, 3600107, Japan
| | - Baoshan Zhao
- Department of Pathology and Pathophysiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, 163319, Heilongjiang, China
| | - Dongmei Zhang
- Department of Pathology and Pathophysiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, 163319, Heilongjiang, China
| | - Yuhua Fan
- Department of Pathology and Pathophysiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, 163319, Heilongjiang, China
| | - Lili Liu
- Department of Pathology and Pathophysiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, 163319, Heilongjiang, China
| | - Xueling Jia
- Department of Pathology and Pathophysiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, 163319, Heilongjiang, China
| | - Ming Liu
- Department of Pathology, the Fifth Affiliated Hospital of Harbin Medical University, Daqing, 163319, Heilongjiang, China
| | - Sihang Song
- Department of Histology and Embryology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, 163319, Heilongjiang, China
| | - Lin Wang
- Department of Pathology and Pathophysiology, College of Basic Medical Sciences, Harbin Medical University-Daqing, Daqing, 163319, Heilongjiang, China.
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Luo Y, Li M, Pratap UP, Viswanadhapalli S, Liu J, Venkata PP, Altwegg KA, Palacios BE, Li X, Chen Y, Rao MK, Brenner AJ, Sareddy GR, Vadlamudi RK. PELP1 signaling contributes to medulloblastoma progression by regulating the NF-κB pathway. Mol Carcinog 2019; 59:281-292. [PMID: 31872914 DOI: 10.1002/mc.23152] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 12/03/2019] [Accepted: 12/14/2019] [Indexed: 12/20/2022]
Abstract
Medulloblastoma (MB) is the most common and deadliest brain tumor in children. Proline-, glutamic acid-, and leucine-rich protein 1 (PELP1) is a scaffolding protein and its oncogenic signaling is implicated in the progression of several cancers. However, the role of PELP1 in the progression of MB remains unknown. The objective of this study is to examine the role of PELP1 in the progression of MB. Immunohistochemical analysis of MB tissue microarrays revealed that PELP1 is overexpressed in the MB specimens compared to normal brain. Knockdown of PELP1 reduced cell proliferation, cell survival, and cell invasion of MB cell lines. The RNA-sequencing analysis revealed that PELP1 knockdown significantly downregulated the pathways related to inflammation and extracellular matrix. Gene set enrichment analysis confirmed that the PELP1-regulated genes were negatively correlated with nuclear factor-κB (NF-κB), extracellular matrix, and angiogenesis gene sets. Interestingly, PELP1 knockdown reduced the expression of NF-κB target genes, NF-κB reporter activity, and inhibited the nuclear translocation of p65. Importantly, the knockdown of PELP1 significantly reduced in vivo MB progression in orthotopic models and improved the overall mice survival. Collectively, these results suggest that PELP1 could be a novel target for therapeutic intervention in MB.
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Affiliation(s)
- Yiliao Luo
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas.,Department of General Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Department of Neurosurgery, The Second Xiangya Hospital, Xiangya School of Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Mengxing Li
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas.,Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Uday P Pratap
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas
| | | | - Junhao Liu
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas.,Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Prabhakar P Venkata
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas
| | - Kristin A Altwegg
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas.,Mays Cancer Center, Cancer Development and Progression Program, University of Texas Health San Antonio, San Antonio, Texas
| | - Bridgitte E Palacios
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas
| | - Xiaonan Li
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas
| | - Yihong Chen
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas.,Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Manjeet K Rao
- Mays Cancer Center, Cancer Development and Progression Program, University of Texas Health San Antonio, San Antonio, Texas.,Department of Cell Systems and Anatomy, University of Texas Health San Antonio, San Antonio, Texas
| | - Andrew J Brenner
- Mays Cancer Center, Cancer Development and Progression Program, University of Texas Health San Antonio, San Antonio, Texas.,Department of Hematology and Oncology, University of Texas Health San Antonio, San Antonio, Texas
| | - Gangadhara R Sareddy
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas.,Mays Cancer Center, Cancer Development and Progression Program, University of Texas Health San Antonio, San Antonio, Texas
| | - Ratna K Vadlamudi
- Department of Obstetrics and Gynecology, University of Texas Health San Antonio, San Antonio, Texas.,Mays Cancer Center, Cancer Development and Progression Program, University of Texas Health San Antonio, San Antonio, Texas
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7
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Wang X, Tsang JYS, Lee MA, Ni YB, Tong JH, Chan SK, Cheung SY, To KF, Tse GM. The Clinical Value of PELP1 for Breast Cancer: A Comparison with Multiple Cancers and Analysis in Breast Cancer Subtypes. Cancer Res Treat 2018; 51:706-717. [PMID: 30134648 PMCID: PMC6473277 DOI: 10.4143/crt.2018.316] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 08/21/2018] [Indexed: 12/27/2022] Open
Abstract
Purpose Proline, glutamic acid, and leucine-rich protein 1 (PELP1), a novel nuclear receptor (NR) co-regulator, is highly expressed in breast cancer. We investigated its expression in breast cancer subtypes, in comparison with other breast markers as well as cancers from different sites. Its prognostic relevance with different subtypes and other NR expression was also examined in breast cancers. Methods Immunohistochemical analysis was performed on totally 1,944 cancers from six different organs. Results PELP1 expression rate was the highest in breast cancers (70.5%) among different cancers. Compared to GATA3, mammaglobin and gross cystic disease fluid protein 15, PELP1 was less sensitive than GATA3 for luminal cancers, but was the most sensitive for non-luminal cancers. PELP1 has low expression rate (<20%) in colorectal cancers, gastric cancers and renal cell carcinomas, but higher in lung cancers (49.1%) and ovarian cancers (42.3%). In breast cancer, PELP1 expression was an independent adverse prognostic factor for non-luminal cancers (disease-free survival [DFS]: hazard ratio [HR], 1.403; p=0.012 and breast cancer specific survival [BCSS]: HR, 1.443; p=0.015). Interestingly, its expression affected the prognostication of androgen receptor (AR). ARposPELP1lo luminal cancer showed the best DFS (log-rank=8.563, p=0.036) while ARnegPELP1hi non-luminal cancers showed the worst DFS (log-rank=9.536, p=0.023). Conclusion PELP1 is a sensitive marker for breast cancer, particularly non-luminal cases. However, its considerable expression in lung and ovarian cancers may limit its utility in differential diagnosis in some scenarios. PELP1 expression was associated with poor outcome in non-luminal cancers and modified the prognostic effects of AR, suggesting the potential significance of NR co-regulator in prognostication.
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Affiliation(s)
- Xingen Wang
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Julia Y S Tsang
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong
| | - Michelle A Lee
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong
| | - Yun-Bi Ni
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong
| | - Joanna H Tong
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong
| | - Siu-Ki Chan
- Department of Pathology, Kwong Wah Hospital, Hong Kong
| | | | - Ka Fai To
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong
| | - Gary M Tse
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong
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8
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Campbell MC, Pontiggia L, Russell AY, Schwarting R, Camacho J, Jasmin JF, Mercier I. CAPER as a therapeutic target for triple negative breast cancer. Oncotarget 2018; 9:30340-30354. [PMID: 30100993 PMCID: PMC6084388 DOI: 10.18632/oncotarget.25719] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Accepted: 06/13/2018] [Indexed: 12/31/2022] Open
Abstract
Breast cancers (BCas) that lack expression of the estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2) are referred to as triple negative breast cancers (TNBCs) and have the poorest clinical outcome. Once these aggressive tumors progress to distant organs, the median survival decreases to 12 months. With endocrine therapies being ineffective in this BCa subtype, highly toxic chemo- and radiation therapies are the only options. A better understanding of the functional role(s) of molecular targets contributing to TNBC progression could help in the design and development of new treatments that are more targeted with less toxicity. CAPER (Co-activator of AP-1 and ER) is a nuclear transcriptional co-activator that was recently involved in ER-positive BCa progression, however its role in hormone-independent cancers remains unknown. Our current report demonstrates that CAPER expression is upregulated in human TNBC specimens compared to normal breast tissue and that its selective downregulation through a lentiviral-mediated shRNA knockdown approach resulted in decreased cell numbers in MDA-MB-231 and BT549 TNBC cell lines without affecting the growth of non-tumorigenic cell line MCF-10A. Concordant with these observations, CAPER knockdown was also associated with a decrease in DNA repair proteins leading to a marked increase in apoptosis, through caspase-3/7 activation without any changes in cell cycle. Collectively, we propose CAPER as an important signaling molecule in the development of TNBC linked to DNA repair mechanisms, which could lead to new therapeutic modalities for the treatment of this aggressive cancer.
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Affiliation(s)
- Mallory C Campbell
- Department of Pharmaceutical Sciences, Philadelphia College of Pharmacy, University of the Sciences, Philadelphia, PA 19104, USA
| | - Laura Pontiggia
- Department of Mathematics, Physics and Statistics, Misher College of Arts and Sciences, University of the Sciences, Philadelphia, PA 19104, USA
| | - Ashley Y Russell
- Department of Pharmaceutical Sciences, Philadelphia College of Pharmacy, University of the Sciences, Philadelphia, PA 19104, USA
| | - Roland Schwarting
- Department of Pathology, Cooper University Hospital, Camden, NJ 08103, USA
| | - Jeanette Camacho
- Department of Pathology, Cooper University Hospital, Camden, NJ 08103, USA
| | - Jean-Francois Jasmin
- Department of Pharmaceutical Sciences, Philadelphia College of Pharmacy, University of the Sciences, Philadelphia, PA 19104, USA
| | - Isabelle Mercier
- Department of Pharmaceutical Sciences, Philadelphia College of Pharmacy, University of the Sciences, Philadelphia, PA 19104, USA.,Program in Personalized Medicine and Targeted Therapeutics, University of the Sciences, Philadelphia, PA 19104, USA
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9
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Peng Y, Butt YM, Chen B, Zhang X, Tang P. Update on Immunohistochemical Analysis in Breast Lesions. Arch Pathol Lab Med 2017; 141:1033-1051. [PMID: 28574279 DOI: 10.5858/arpa.2016-0482-ra] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
CONTEXT - The utility of immunohistochemistry (IHC) in breast lesions needs to be updated with exceptions among these lesions. Biomarker studies with IHC in triple-negative breast carcinoma may help develop targeted therapies for this aggressive breast cancer. The distinction of metastatic lung adenocarcinoma to the breast and invasive breast carcinoma has significant prognostic and therapeutic implications. The determination can be challenging because both primary tumors can express estrogen receptor and/or HER2 by IHC, creating a diagnostic dilemma. OBJECTIVES - To provide a practical update on the use of IHC markers in differential diagnoses in breast lesions, including benign, atypical, precancerous, and malignant tumors; to highlight recently published research findings on novel IHC markers in triple-negative breast carcinoma cases; and to reinforce the importance of IHC use as an ancillary tool in distinguishing metastatic lung adenocarcinoma to the breast from primary breast carcinoma using real case examples. DATA SOURCES - PubMed (US National Library of Medicine, Bethesda, Maryland) literature review and authors' research data and personal experiences were used in this review. CONCLUSIONS - Immunohistochemistry has an important role in making differential diagnoses in breast lesions in morphologically equivocal settings; recognizing IHC expression status in the exceptions among these lesions will aid in the correct diagnosis of challenging breast cases. Studies suggest that androgen receptor, p16, p53, GATA3, and PELP1 may have potential diagnostic, prognostic, and predictive value in triple-negative breast carcinoma cases; these findings may provide insight and a greater understanding of the tumor biology in triple-negative breast carcinomas. In distinguishing metastatic estrogen receptor-positive or HER2+ lung adenocarcinoma to the breast from primary breast carcinoma, napsin A, TTF-1, and GATA3 comprise a useful IHC panel.
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Affiliation(s)
| | | | | | | | - Ping Tang
- From the Department of Pathology, University of Texas Southwestern Medical Center, Dallas (Drs Peng and Butt); the Department of Pathology, Mayo Clinic and Foundation, Rochester, Minnesota (Dr Chen); the Department of Pathology, Cooper Medical School of Rowan University, Camden, New Jersey (Dr Zhang); and the Department of Pathology and Laboratory Medicine, University of Rochester, Rochester, New York (Dr Tang)
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10
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Du L, Ning Z, Zhang H, Liu F. Corepressor metastasis-associated protein 3 modulates epithelial-to-mesenchymal transition and metastasis. CHINESE JOURNAL OF CANCER 2017; 36:28. [PMID: 28279208 PMCID: PMC5345190 DOI: 10.1186/s40880-017-0193-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 02/22/2017] [Indexed: 02/05/2023]
Abstract
Worldwide, metastasis is the leading cause of more than 90% of cancer-related deaths. Currently, no specific therapies effectively impede metastasis. Metastatic processes are controlled by complex regulatory networks and transcriptional hierarchy. Corepressor metastasis-associated protein 3 (MTA3) has been confirmed as a novel component of nucleosome remodeling and histone deacetylation (NuRD). Increasing evidence supports the theory that, in the recruitment of transcription factors, coregulators function as master regulators rather than passive passengers. As a master regulator, MTA3 governs the target selection for NuRD and functions as a transcriptional repressor. MTA3 dysregulation is associated with tumor progression, invasion, and metastasis in various cancers. MTA3 is also a key regulator of E-cadherin expression and epithelial-to-mesenchymal transition. Elucidating the functions of MTA3 might help to find additional therapeutic approaches for targeting components of NuRD.
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Affiliation(s)
- Liang Du
- Cancer Research Center, Shantou University Medical College, Shantou, 515031 Guangdong P. R. China
| | - Zhifeng Ning
- Basic Medicine College, Hubei University of Science and Technology, Xianning, 437100 Hubei P. R. China
| | - Hao Zhang
- Cancer Research Center, Shantou University Medical College, Shantou, 515031 Guangdong P. R. China
- Department of Biotherapy, Affiliated Cancer Hospital of Shantou University Medical College, Shantou, 515031 Guangdong P. R. China
| | - Fuxing Liu
- Basic Medicine College, Hubei University of Science and Technology, Xianning, 437100 Hubei P. R. China
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11
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Girard BJ, Knutson TP, Kuker B, McDowell L, Schwertfeger KL, Ostrander JH. Cytoplasmic Localization of Proline, Glutamic Acid, Leucine-rich Protein 1 (PELP1) Induces Breast Epithelial Cell Migration through Up-regulation of Inhibitor of κB Kinase ϵ and Inflammatory Cross-talk with Macrophages. J Biol Chem 2016; 292:339-350. [PMID: 27881676 DOI: 10.1074/jbc.m116.739847] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 11/22/2016] [Indexed: 01/06/2023] Open
Abstract
Cytoplasmic localization of proline, glutamic acid, leucine-rich protein 1 (PELP1) is observed in ∼40% of women with invasive breast cancer. In mouse models, PELP1 overexpression in the mammary gland leads to premalignant lesions and eventually mammary tumors. In preliminary clinical studies, cytoplasmic localization of PELP1 was seen in 36% of women at high risk of developing breast cancer. Here, we investigated whether cytoplasmic PELP1 signaling promotes breast cancer initiation in models of immortalized human mammary epithelial cells (HMECs). Global gene expression analysis was performed on HMEC lines expressing vector control, PELP1-wt, or mutant PELP1 in which the nuclear localization sequence was altered, resulting in cytoplasmic localization of PELP1 (PELP1-cyto). Global gene expression analysis identified that PELP1-cyto expression in HMECs induced NF-κB signaling pathways. Western blotting analysis of PELP1-cyto HMECs showed up-regulation of inhibitor of κB kinase ϵ (IKKϵ) and increased phosphorylation of the NF-κB subunit RelB. To determine whether secreted factors produced by PELP1-cyto HMECs promote macrophage activation, THP-1 macrophages were treated with HMEC-conditioned medium (CM). PELP1-cyto CM induced changes in THP-1 gene expression as compared with control cell CM. Double conditioned medium (DCM) from the activated THP-1 cells was then applied to HMECs to determine whether paracrine signaling from PELP1-cyto-activated macrophages could in turn promote migration of HMECs. PELP1-cyto DCM induced robust HMEC migration, which was reduced in DCM from PELP1-cyto HMECs expressing IKKϵ shRNA. Our findings suggest that cytoplasmic localization of PELP1 up-regulates pro-tumorigenic IKKϵ and secreted inflammatory signals, which through paracrine macrophage activation regulates the migratory phenotype associated with breast cancer initiation.
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Affiliation(s)
| | | | | | | | - Kathryn L Schwertfeger
- From the Masonic Cancer Center and.,Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota 55455
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12
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O'Brien K, Lowry MC, Corcoran C, Martinez VG, Daly M, Rani S, Gallagher WM, Radomski MW, MacLeod RAF, O'Driscoll L. miR-134 in extracellular vesicles reduces triple-negative breast cancer aggression and increases drug sensitivity. Oncotarget 2016; 6:32774-89. [PMID: 26416415 PMCID: PMC4741729 DOI: 10.18632/oncotarget.5192] [Citation(s) in RCA: 188] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Accepted: 09/14/2015] [Indexed: 01/08/2023] Open
Abstract
Exosomes (EVs) have relevance in cell-to-cell communication carrying pro-tumorigenic factors that participate in oncogenesis and drug resistance and are proposed to have potential as self-delivery systems. Advancing on our studies of EVs in triple-negative breast cancer, here we more comprehensively analysed isogenic cell line variants and their EV populations, tissues cell line variants and their EV populations, as well as breast tumour and normal tissues. Profiling 384 miRNAs showed EV miRNA content to be highly representative of their cells of origin. miRNAs most substantially down-regulated in aggressive cells and their EVs originated from 14q32. Analysis of miR-134, the most substantially down-regulated miRNA, supported its clinical relevance in breast tumours compared to matched normal breast tissue. Functional studies indicated that miR-134 controls STAT5B which, in turn, controls Hsp90. miR-134 delivered by direct transfection into Hs578Ts(i)8 cells (in which it was greatly down-regulated) reduced STAT5B, Hsp90, and Bcl-2 levels, reduced cellular proliferation, and enhanced cisplatin-induced apoptosis. Delivery via miR-134-enriched EVs also reduced STAT5B and Hsp90, reduced cellular migration and invasion, and enhanced sensitivity to anti-Hsp90 drugs. While the differing effects achieved by transfection or EV delivery are likely to be, at least partly, due to specific amounts of miR-134 delivered by these routes, these EV-based studies identified miRNA-134 as a potential biomarker and therapeutic for breast cancer.
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Affiliation(s)
- Keith O'Brien
- School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin, Ireland
| | - Michelle C Lowry
- School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin, Ireland
| | - Claire Corcoran
- School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin, Ireland
| | - Vanesa G Martinez
- School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin, Ireland
| | - Melissa Daly
- School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin, Ireland
| | - Sweta Rani
- School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin, Ireland
| | - William M Gallagher
- Cancer Biology and Therapeutics Laboratory, Conway Institute, UCD School of Biomolecular and Biomedical Science, Dublin, Ireland
| | - Marek W Radomski
- School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin, Ireland
| | - Roderick A F MacLeod
- Leibniz Institute DSMZ, German Collection of Human and Animal Cell Cultures, Braunschweig, Germany
| | - Lorraine O'Driscoll
- School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin, Ireland
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13
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Ai R, Sun Y, Guo Z, Wei W, Zhou L, Liu F, Hendricks DT, Xu Y, Zhao X. NDRG1 overexpression promotes the progression of esophageal squamous cell carcinoma through modulating Wnt signaling pathway. Cancer Biol Ther 2016; 17:943-54. [PMID: 27414086 PMCID: PMC5036407 DOI: 10.1080/15384047.2016.1210734] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
N-myc down-regulated gene 1 (NDRG1) has been shown to regulate tumor growth and metastasis in various malignant tumors and also to be dysregulated in esophageal squamous cell carcinoma (ESCC). Here, we show that NDRG1 overexpression (91.9%, 79/86) in ESCC tumor tissues is associated with poor overall survival of esophageal cancer patients. When placed in stable transfectants of the KYSE 30 ESCC cell line generated by lentiviral transduction with the ectopic overexpression of NDRG1, the expression of transducin-like enhancer of Split 2 (TLE2) was decreased sharply, however β−catenin was increased. Mechanistically, NDRG1 physically associates with TLE2 and β−catenin to affect the Wnt pathway. RNA interference and TLE2 overexpression studies demonstrate that NDRG1 fails to active Wnt pathway compared with isogenic wild-type controls. Strikingly, NDRG1 overexpression induces the epithelial mesenchymal transition (EMT) through activating the Wnt signaling pathway in ESCC cells, decreased the expression of E-cadherin and enhanced the expression of Snail. Our study elucidates a mechanism of NDRG1-regulated Wnt pathway activation and EMT via affecting TLE2 and β-catenin expression in esophageal cancer cells. This indicates a pro-oncogenic role for NDRG1 in esophageal cancer cells whereby it modulates tumor progression.
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Affiliation(s)
- Runna Ai
- a State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , China
| | - Yulin Sun
- a State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , China
| | - Zhimin Guo
- a State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , China
| | - Wei Wei
- b Division of Medical Biochemistry , Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town , Cape Town , South Africa
| | - Lanping Zhou
- a State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , China
| | - Fang Liu
- a State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , China
| | - Denver T Hendricks
- b Division of Medical Biochemistry , Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town , Cape Town , South Africa
| | - Yang Xu
- a State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , China
| | - Xiaohang Zhao
- a State Key Laboratory of Molecular Oncology, National Cancer Center/Cancer Hospital , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , China
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14
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Wang W, Belosay A, Yang X, Hartman JA, Song H, Iwaniec UT, Turner RT, Churchwell MI, Doerge DR, Helferich WG. Effects of letrozole on breast cancer micro-metastatic tumor growth in bone and lung in mice inoculated with murine 4T1 cells. Clin Exp Metastasis 2016; 33:475-85. [PMID: 27209469 DOI: 10.1007/s10585-016-9792-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 04/11/2016] [Indexed: 12/11/2022]
Abstract
Breast cancer (BC) is the leading cancer in women worldwide. Metastasis occurs in stage IV BC with bone and lung being common metastatic sites. Here we evaluate the effects of the aromatase inhibitor letrozole on BC micro-metastatic tumor growth in bone and lung metastasis in intact and ovariectomized (OVX) mice with murine estrogen receptor negative (ER-) BC cells inoculated in tibia. Forty-eight BALB/c mice were randomly assigned to one of four groups: OVX, OVX + Letrozole, Intact, and Intact + Letrozole, and injected with 4T1 cells intra-tibially. Letrozole was subcutaneously injected daily for 23 days at a dose of 1.75 µg/g body weight. Tumor progression was monitored by bioluminescence imaging (BLI). Following necropsy, inoculated tibiae were scanned via µCT and bone response to tumor was scored from 0 (no ectopic mineralization/osteolysis) to 5 (extensive ectopic mineralization/osteolysis). OVX mice had higher tibial pathology scores indicative of more extensive bone destruction than intact mice, irrespective of letrozole treatment. Letrozole decreased serum estradiol levels and reduced lung surface tumor numbers in intact animals. Furthermore, mice receiving letrozole had significantly fewer tumor colonies and fewer proliferative cells in the lung than OVX and intact controls based on H&E and Ki-67 staining, respectively. In conclusion, BC-inoculated OVX animals had higher tibia pathology scores than BC-inoculated intact animals and letrozole reduced BC metastases to lungs. These findings suggest that, by lowering systemic estrogen level and/or by interacting with the host organ, the aromatase inhibitor letrozole has the potential to reduce ER- BC metastasis to lung.
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Affiliation(s)
- Wendan Wang
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, 574 Bevier Hall, 905 South Goodwin Avenue, Urbana, IL, 61801, USA
| | - Aashvini Belosay
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, 574 Bevier Hall, 905 South Goodwin Avenue, Urbana, IL, 61801, USA
| | - Xujuan Yang
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, 574 Bevier Hall, 905 South Goodwin Avenue, Urbana, IL, 61801, USA
| | - James A Hartman
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, 574 Bevier Hall, 905 South Goodwin Avenue, Urbana, IL, 61801, USA
| | - Huaxin Song
- Health Sciences Center, School of Nursing, Texas Tech University, Lubbock, TX, USA
| | - Urszula T Iwaniec
- Skeletal Biology Laboratory, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, USA.,Center for Healthy Aging Research, Oregon State University, Corvallis, OR, USA
| | - Russell T Turner
- Skeletal Biology Laboratory, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, USA.,Center for Healthy Aging Research, Oregon State University, Corvallis, OR, USA
| | - Mona I Churchwell
- Division of Biochemical Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Road, Jefferson, AR, 72079, USA
| | - Daniel R Doerge
- Division of Biochemical Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, 3900 NCTR Road, Jefferson, AR, 72079, USA
| | - William G Helferich
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, 574 Bevier Hall, 905 South Goodwin Avenue, Urbana, IL, 61801, USA.
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15
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Cao Y, Wang Q, Du Y, Liu F, Zhang Y, Feng Y, Jin F. l-arginine and docetaxel synergistically enhance anti-tumor immunity by modifying the immune status of tumor-bearing mice. Int Immunopharmacol 2016; 35:7-14. [PMID: 27003114 DOI: 10.1016/j.intimp.2016.03.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 02/27/2016] [Accepted: 03/01/2016] [Indexed: 12/28/2022]
Abstract
l-arginine (l-Arg) supplementation has been reported to enhance the function of immune cells, including dendritic cells (DCs) and T lymphocytes, in cancer models thereby countering the suppressive effects of myeloid-derived suppressor cells (MDSCs). The balance of the active immune cells is one factor that determines the progression of cancers in vivo. Docetaxel (DTX), an immunomodulatory chemotherapeutic agent, is now widely used in several types of malignancies including breast cancer. We hypothesized that the combination of DTX and l-Arg would elicit a more robust antitumor response than either molecule alone. To test this hypothesis we utilized BALB/c mice inoculated with 4T1 mammary carcinoma cells. DTX and l-Arg synergistically limited tumor growth in vivo and moderately increased the life span of tumor bearing mice. The anti-tumor effects were associated with the proliferation of splenic CD8(+) CTL and CD4(+) Th1 effector cells, as well as increased serum levels of interferon gamma. More importantly, DTX+l-Arg effectively increased anti-tumor immunity within the tumor microenvironment. Furthermore, the combined therapy increased the number of myeloid (mDCs) and plasmacytoid (pDCs) dendritic cells, potent activators of the T cell response, and enhanced expression of the maturation markers CD86 and MHC II (required for antigen presentation). The combination therapy also reduced the proliferation of MDSCs. These data suggest that DTX+l-Arg may be a novel therapeutic strategy for breast cancer patients.
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Affiliation(s)
- Yu Cao
- Department of Surgical Oncology and Breast Surgery, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, China
| | - Qinghui Wang
- Department of Immunology, College of Basic Medical Sciences, China Medical University, Shenyang, Liaoning 110122, China
| | - Yunting Du
- Department of Immunology, College of Basic Medical Sciences, China Medical University, Shenyang, Liaoning 110122, China
| | - Fei Liu
- Department of Immunology, College of Basic Medical Sciences, China Medical University, Shenyang, Liaoning 110122, China
| | - Yanjun Zhang
- Department of Medical Examination Center, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, China
| | - Yonghui Feng
- Department of Laboratory Medicine, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, China
| | - Feng Jin
- Department of Surgical Oncology and Breast Surgery, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, China.
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16
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PELP1: Structure, biological function and clinical significance. Gene 2016; 585:128-134. [PMID: 26997260 DOI: 10.1016/j.gene.2016.03.017] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 03/05/2016] [Accepted: 03/08/2016] [Indexed: 01/10/2023]
Abstract
Proline-, glutamic acid-, and leucine-rich protein 1 (PELP1) is a scaffolding protein that functions as a coregulator of several transcription factors and nuclear receptors. Notably, the PELP1 protein has a histone-binding domain, recognizes histone modifications and interacts with several chromatin-modifying complexes. PELP1 serves as a substrate of multitude of kinases, and phosphorylation regulates its functions in various complexes. Further, PELP1 plays essential roles in several pathways including hormonal signaling, cell cycle progression, ribosomal biogenesis, and the DNA damage response. PELP1 expression is upregulated in several cancers, its deregulation contributes to therapy resistance, and it is a prognostic biomarker for breast cancer survival. Recent evidence suggests that PELP1 represents a novel therapeutic target for many hormonal cancers. In this review, we summarized the emerging biological properties and functions of PELP1.
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17
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High mobility group box 1-induced epithelial mesenchymal transition in human airway epithelial cells. Sci Rep 2016; 6:18815. [PMID: 26739898 PMCID: PMC4703978 DOI: 10.1038/srep18815] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 11/13/2015] [Indexed: 12/31/2022] Open
Abstract
Epithelial–mesenchymal transition (EMT) is implicated in bronchial remodeling and loss of lung function in chronic inflammatory airway diseases. Previous studies showed the involvement of the high mobility group box 1 (HMGB1) protein in the pathology of chronic pulmonary inflammatory diseases. However, the role of HMGB1 in EMT of human airway epithelial cells is still unclear. In this study, we used RNA sequencing to show that HMGB1 treatment regulated EMT-related gene expression in human primary-airway epithelial cells. The top five upregulated genes were SNAI2, FGFBP1, VIM, SPARC (osteonectin), and SERPINE1, while the downregulated genes included OCLN, TJP1 (ZO-1), FZD7, CDH1 (E-cadherin), and LAMA5. We found that HMGB1 induced downregulation of E-cadherin and ZO-1, and upregulation of vimentin mRNA transcription and protein translation in a dose-dependent manner. Additionally, we observed that HMGB1 induced AKT phosphorylation, resulting in GSK3β inactivation, cytoplasmic accumulation, and nuclear translocation of β-catenin to induce EMT in human airway epithelial cells. Treatment with PI3K inhibitor (LY294006) and β-catenin shRNA reversed HMGB1-induced EMT. Moreover, HMGB1 induced expression of receptor for advanced glycation products (RAGE), but not that of Toll-like receptor (TLR) 2 or TLR4, and RAGE shRNA inhibited HMGB1-induced EMT in human airway epithelial cells. In conclusion, we found that HMGB1 induced EMT through RAGE and the PI3K/AKT/GSK3β/β-catenin signaling pathway.
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18
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Zhang Y, Dai J, McNamara KM, Bai B, Shi M, Chan MSM, Liu M, Sasano H, Wang X, Li X, Liu L, Ma Y, Cao S, Xing Y, Zhao B, Song Y, Wang L. Prognostic significance of proline, glutamic acid, leucine rich protein 1 (PELP1) in triple-negative breast cancer: a retrospective study on 129 cases. BMC Cancer 2015; 15:699. [PMID: 26472563 PMCID: PMC4608314 DOI: 10.1186/s12885-015-1694-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 10/07/2015] [Indexed: 12/26/2022] Open
Abstract
Background Triple-negative breast cancer (TNBC) is associated with an aggressive clinical course due to the lack of therapeutic targets. Therefore, identifying reliable prognostic biomarkers and novel therapeutic targets for patients with TNBC is required. Proline, glutamic acid, leucine rich protein 1 (PELP1) is a novel steroidal receptor co-regulator, functioning as an oncogene and its expression is maintained in estrogen receptor (ER) negative breast cancers. PELP1 has been proposed as a prognostic biomarker in hormone-related cancers, including luminal-type breast cancers, but its significance in TNBC has not been studied. Methods PELP1 immunoreactivity was evaluated using immunohistochemistry in 129 patients with TNBC. Results were correlated with clinicopathological variables including patient’s age, tumor size, lymph node stage, tumor grade, clinical stage, histological type, Ki-67 LI, as well as clinical outcome of the patients, including disease-free survival (DFS) and overall survival (OS). Results PELP1 was localized predominantly in the nuclei of carcinoma cells in TNBC. With the exception of a positive correlation between PELP1 protein expression and lymph node stage (p = 0.027), no significant associations between PELP1 protein expression and other clinicopathological variables, including DFS and OS, were found. However, when PELP1 and Ki-67 LI were grouped together, we found that patients in the PELP1/Ki-67 double high group (n = 48) demonstrated significantly reduced DFS (p = 0.005, log rank test) and OS (p = 0.002, log rank test) than others (n = 81). Multivariable analysis supported PELP1/Ki-67 double high expression as an independent prognostic factor in patients with TNBC, with an adjusted hazard ratio of 2.020 for recurrence (95 % CL, 1.022–3.990; p = 0.043) and of 2.380 for death (95 % CL, 1.138–4.978; p = 0.021). Conclusions We found that evaluating both PELP1 and Ki-67 expression in TNBC could enhance the prognostic sensitivity of the two biomarkers. Therefore, we propose that PELP1/Ki-67 double high expression in tumors is an independent prognostic factor for predicting a poor outcome for patients with TNBC.
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Affiliation(s)
- Yanzhi Zhang
- Department of Pathology, Harbin Medical University-Daqing, No. 39 Xinyang Road, Hi-Tech Zone, Daqing, Heilongjiang, China.
| | - Jiali Dai
- Department of Pathology, Harbin Medical University-Daqing, No. 39 Xinyang Road, Hi-Tech Zone, Daqing, Heilongjiang, China.
| | - Keely M McNamara
- Department of Pathology, Tohoku University School of Medicine, Sendai, Japan.
| | - Bing Bai
- Department of Histology and Biology, Harbin Medical University-Daqing, Daqing, China.
| | - Mumu Shi
- Department of Pathology, Harbin Medical University-Daqing, No. 39 Xinyang Road, Hi-Tech Zone, Daqing, Heilongjiang, China.
| | - Monica S M Chan
- Department of Pathology, Tohoku University School of Medicine, Sendai, Japan.
| | - Ming Liu
- Department of Pathology, Harbin Medical University-Daqing, No. 39 Xinyang Road, Hi-Tech Zone, Daqing, Heilongjiang, China. .,Department of Pathology, The Fifth Affiliated Hospital of Harbin Medical University, Daqing, China.
| | - Hironobu Sasano
- Department of Pathology, Tohoku University School of Medicine, Sendai, Japan.
| | - Xiuli Wang
- Department of Pathology, Harbin Medical University-Daqing, No. 39 Xinyang Road, Hi-Tech Zone, Daqing, Heilongjiang, China.
| | - Xiaolei Li
- Department of Pathology, Harbin Medical University-Daqing, No. 39 Xinyang Road, Hi-Tech Zone, Daqing, Heilongjiang, China.
| | - Lijuan Liu
- Department of Pathology, Harbin Medical University-Daqing, No. 39 Xinyang Road, Hi-Tech Zone, Daqing, Heilongjiang, China.
| | - Ying Ma
- Department of Pathology, Harbin Medical University-Daqing, No. 39 Xinyang Road, Hi-Tech Zone, Daqing, Heilongjiang, China.
| | - Shuwen Cao
- Department of Pathology, Daqing Oilfield General Hospital, Daqing, China.
| | - Yanchun Xing
- Department of Pathology, Daqing Longnan Hospital, Daqing, China.
| | - Baoshan Zhao
- Department of Pathology, Harbin Medical University-Daqing, No. 39 Xinyang Road, Hi-Tech Zone, Daqing, Heilongjiang, China.
| | - Yinli Song
- Department of Pathology, Harbin Medical University-Daqing, No. 39 Xinyang Road, Hi-Tech Zone, Daqing, Heilongjiang, China.
| | - Lin Wang
- Department of Pathology, Harbin Medical University-Daqing, No. 39 Xinyang Road, Hi-Tech Zone, Daqing, Heilongjiang, China.
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Abstract
Therapies targeting estrogen receptor alpha (ERα), including selective ER modulators such as tamoxifen, selective ER downregulators such as fulvestrant (ICI 182 780), and aromatase inhibitors such as letrozole, are successfully used in treating breast cancer patients whose initial tumor expresses ERα. Unfortunately, the effectiveness of endocrine therapies is limited by acquired resistance. The role of microRNAs (miRNAs) in the progression of endocrine-resistant breast cancer is of keen interest in developing biomarkers and therapies to counter metastatic disease. This review focuses on miRNAs implicated as disruptors of antiestrogen therapies, their bona fide gene targets and associated pathways promoting endocrine resistance.
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Affiliation(s)
- Penn Muluhngwi
- Department of Biochemistry and Molecular GeneticsCenter for Genetics and Molecular Medicine, University of Louisville School of Medicine, Louisville, Kentucky 40292, USA
| | - Carolyn M Klinge
- Department of Biochemistry and Molecular GeneticsCenter for Genetics and Molecular Medicine, University of Louisville School of Medicine, Louisville, Kentucky 40292, USA
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20
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Dang DN, Raj G, Sarode V, Molberg KH, Vadlamudi RK, Peng Y. Significantly increased PELP1 protein expression in primary and metastatic triple-negative breast carcinoma: comparison with GATA3 expression and PELP1's potential role in triple-negative breast carcinoma. Hum Pathol 2015; 46:1829-35. [PMID: 26428280 DOI: 10.1016/j.humpath.2015.07.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Revised: 07/23/2015] [Accepted: 07/29/2015] [Indexed: 01/20/2023]
Abstract
PELP1 is a novel coregulator of nuclear hormone receptors and is implicated in playing a role in driving breast cancer and enhancing metastatic potential. The PELP1 protein expression and potential role of PELP1 in triple-negative breast carcinoma (TNBC) have not been well characterized. We investigated PELP1 expression by immunohistochemistry in primary and metastatic triple-negative tumors in human tissues and compared its expression with GATA-binding protein 3 (GATA3), a novel diagnostic marker for TNBC. We examined the expression of PELP1 and GATA3 in 70 primary TNBC cases and found that PELP1 had a significantly higher frequency of expression compared to GATA3 (96% versus 46%; P < .0001). The mean extent score of expression of PELP1 was also significantly higher than GATA3's expression (3.87 ± 0.07 versus 0.91 ± 0.15; P < .0001). PELP1 had stronger staining intensity than GATA3. Furthermore, PELP1 immunoreactivity was consistently maintained in paired primary and metastatic TNBC cases (100%). The frequency of PELP1 expression (100%) in metastatic triple-negative tumors was higher than that of GATA3 (40%) in the same tumors (P < .0001). These findings indicate that PELP1 is a much more sensitive marker than GATA3 for TNBCs. PELP1 may have diagnostic utility for metastatic TNBC in appropriate settings, such as history of primary TNBC in cases where the primary is negative for GATA3, mammaglobin, and GCDFP-15. The diffuse and strong nuclear immunoreactivity of PELP1 in most cases suggests that PELP1 may be a molecular target for the treatment of TNBC. We hope that this study will provide insights into the role of PELP1 in TNBC.
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Affiliation(s)
- Daniel N Dang
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390-9073
| | - Ganesh Raj
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390-9073
| | - Venetia Sarode
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390-9073
| | - Kyle H Molberg
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390-9073
| | - Ratna K Vadlamudi
- Department of Obstetrics & Gynecology, University of Texas Health Science Center, San Antonio, TX 78229
| | - Yan Peng
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390-9073.
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21
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Xu Y, Zhang H, Nguyen VTM, Angelopoulos N, Nunes J, Reid A, Buluwela L, Magnani L, Stebbing J, Giamas G. LMTK3 Represses Tumor Suppressor-like Genes through Chromatin Remodeling in Breast Cancer. Cell Rep 2015; 12:837-49. [PMID: 26212333 DOI: 10.1016/j.celrep.2015.06.073] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 06/11/2015] [Accepted: 06/25/2015] [Indexed: 01/23/2023] Open
Abstract
LMTK3 is an oncogenic receptor tyrosine kinase (RTK) implicated in various types of cancer, including breast, lung, gastric, and colorectal cancer. It is localized in different cellular compartments, but its nuclear function has not been investigated so far. We mapped LMTK3 binding across the genome using ChIP-seq and found that LMTK3 binding events are correlated with repressive chromatin markers. We further identified KRAB-associated protein 1 (KAP1) as a binding partner of LMTK3. The LMTK3/KAP1 interaction is stabilized by PP1α, which suppresses KAP1 phosphorylation specifically at LMTK3-associated chromatin regions, inducing chromatin condensation and resulting in transcriptional repression of LMTK3-bound tumor suppressor-like genes. Furthermore, LMTK3 functions at distal regions in tethering the chromatin to the nuclear periphery, resulting in H3K9me3 modification and gene silencing. In summary, we propose a model where a scaffolding function of nuclear LMTK3 promotes cancer progression through chromatin remodeling.
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Affiliation(s)
- Yichen Xu
- Division of Cancer, Imperial College London, Department of Surgery and Cancer, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Hua Zhang
- Division of Cancer, Imperial College London, Department of Surgery and Cancer, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Van Thuy Mai Nguyen
- Division of Cancer, Imperial College London, Department of Surgery and Cancer, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Nicos Angelopoulos
- Division of Cancer, Imperial College London, Department of Surgery and Cancer, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Joao Nunes
- Division of Cancer, Imperial College London, Department of Surgery and Cancer, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Alistair Reid
- Division of Cancer, Imperial College London, Department of Surgery and Cancer, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Laki Buluwela
- Division of Cancer, Imperial College London, Department of Surgery and Cancer, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Luca Magnani
- Division of Cancer, Imperial College London, Department of Surgery and Cancer, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK.
| | - Justin Stebbing
- Division of Cancer, Imperial College London, Department of Surgery and Cancer, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Georgios Giamas
- Division of Cancer, Imperial College London, Department of Surgery and Cancer, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK.
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22
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Ravindranathan P, Lange CA, Raj GV. Minireview: Deciphering the Cellular Functions of PELP1. Mol Endocrinol 2015; 29:1222-9. [PMID: 26158753 DOI: 10.1210/me.2015-1049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Affiliation(s)
- Preethi Ravindranathan
- Department of Urology (P.R., G.V.R.), University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390; and Departments of Medicine and Pharmacology (C.A.L.), University of Minnesota, Masonic Cancer Center, Minneapolis, Minnesota 55455
| | - Carol A Lange
- Department of Urology (P.R., G.V.R.), University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390; and Departments of Medicine and Pharmacology (C.A.L.), University of Minnesota, Masonic Cancer Center, Minneapolis, Minnesota 55455
| | - Ganesh V Raj
- Department of Urology (P.R., G.V.R.), University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390; and Departments of Medicine and Pharmacology (C.A.L.), University of Minnesota, Masonic Cancer Center, Minneapolis, Minnesota 55455
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23
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Cytoplasmic PELP1 and ERRgamma protect human mammary epithelial cells from Tam-induced cell death. PLoS One 2015; 10:e0121206. [PMID: 25789479 PMCID: PMC4366195 DOI: 10.1371/journal.pone.0121206] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 01/28/2015] [Indexed: 01/24/2023] Open
Abstract
Tamoxifen (Tam) is the only FDA-approved chemoprevention agent for pre-menopausal women at high risk for developing breast cancer. While Tam reduces a woman's risk of developing estrogen receptor positive (ER+) breast cancer, the molecular mechanisms associated with risk reduction are poorly understood. Prior studies have shown that cytoplasmic proline, glutamic acid and leucine rich protein 1 (PELP1) promotes Tam resistance in breast cancer cell lines. Herein, we tested for PELP1 localization in breast epithelial cells from women at high risk for developing breast cancer and found that PELP1 was localized to the cytoplasm in 36% of samples. In vitro, immortalized HMECs expressing a nuclear localization signal (NLS) mutant of PELP1 (PELP1-cyto) were resistant to Tam-induced death. Furthermore, PELP1-cyto signaling through estrogen-related receptor gamma (ERRγ) promoted cell survival in the presence of Tam. Overexpression of ERRγ in immortalized HMECs protected cells from Tam-induced death, while knockdown of ERRγ sensitized PELP1-cyto expressing HMECs to Tam. Moreover, Tam-induced HMEC cell death was independent of apoptosis and involved accumulation of the autophagy marker LC3-II. Expression of PELP1-cyto and ERRγ reduced Tam-induced LC3-II accumulation, and knockdown of ERRγ increased LC3-II levels in response to Tam. Additionally, PELP1-cyto expression led to the upregulation of MMP-3 and MAOB, known PELP1 and ERRγ target genes, respectively. Our data indicate that cytoplasmic PELP1 induces signaling pathways that converge on ERRγ to promote cell survival in the presence of Tam. These data suggest that PELP1 localization and/or ERRγ activation could be developed as tissue biomarkers for Tam responsiveness.
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24
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Krishnan SR, Nair BC, Sareddy GR, Roy SS, Natarajan M, Suzuki T, Peng Y, Raj G, Vadlamudi RK. Novel role of PELP1 in regulating chemotherapy response in mutant p53-expressing triple negative breast cancer cells. Breast Cancer Res Treat 2015; 150:487-99. [PMID: 25788226 DOI: 10.1007/s10549-015-3339-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 03/10/2015] [Indexed: 12/31/2022]
Abstract
Triple-negative breast cancer (TNBC), the most aggressive breast cancer subtype, occurs in younger women and is associated with poor prognosis. Gain-of-function mutations in TP53 are a frequent occurrence in TNBC and have been demonstrated to repress apoptosis and up-regulate cell cycle progression. Even though TNBC responds to initial chemotherapy, resistance to chemotherapy develops and is a major clinical problem. Tumor recurrence eventually occurs and most patients die from their disease. An urgent need exists to identify molecular-targeted therapies that can enhance chemotherapy response. In the present study, we report that targeting PELP1, an oncogenic co-regulator molecule, could enhance the chemotherapeutic response of TNBC through the inhibition of cell cycle progression and activation of apoptosis. We demonstrate that PELP1 interacts with MTp53, regulates its recruitment, and alters epigenetic marks at the target gene promoters. PELP1 knockdown reduced MTp53 target gene expression, resulting in decreased cell survival and increased apoptosis upon genotoxic stress. Mechanistic studies revealed that PELP1 depletion contributes to increased stability of E2F1, a transcription factor that regulates both cell cycle and apoptosis in a context-dependent manner. Further, PELP1 regulates E2F1 stability in a KDM1A-dependent manner, and PELP1 phosphorylation at the S1033 residue plays an important role in mediating its oncogenic functions in TNBC cells. Accordingly, depletion of PELP1 increased the expression of E2F1 target genes and reduced TNBC cell survival in response to genotoxic agents. PELP1 phosphorylation was significantly greater in the TNBC tumors than in the other subtypes of breast cancer and in the normal tissues. These findings suggest that PELP1 is an important molecular target in TNBC, and that PELP1-targeted therapies may enhance response to chemotherapies.
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Affiliation(s)
- Samaya R Krishnan
- Department of Cellular and Structural Biology, UTHSCSA, 7703 Floyd Curl Drive, San Antonio, TX, 78229, USA
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25
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Morettin A, Baldwin RM, Cote J. Arginine methyltransferases as novel therapeutic targets for breast cancer. Mutagenesis 2015; 30:177-89. [DOI: 10.1093/mutage/geu039] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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26
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Cortez V, Samayoa C, Zamora A, Martinez L, Tekmal RR, Vadlamudi RK. PELP1 overexpression in the mouse mammary gland results in the development of hyperplasia and carcinoma. Cancer Res 2014; 74:7395-405. [PMID: 25377474 DOI: 10.1158/0008-5472.can-14-0993] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Estrogen receptor (ER) coregulator overexpression promotes carcinogenesis and/or progression of endocrine related-cancers in which steroid hormones are powerful mitogenic agents. Recent studies in our laboratory, as well as others, demonstrated that the estrogen receptor coregulator PELP1 is a proto-oncogene. PELP1 interactions with histone demethylase KDM1 play a critical role in its oncogenic functions and PELP1 is a prognostic indicator of decreased survival in patients with breast cancer. However, the in vivo significance of PELP1 deregulation during initiation and progression of breast cancer remains unknown. We generated an inducible, mammary gland-specific PELP1-expressing transgenic (Tg) mouse (MMTVrtTA-TetOPELP1). We found more proliferation, extensive side branching, and precocious differentiation in PELP1-overexpressing mammary glands than in control glands. Aged MMTVrtTA-TetOPELP1 Tg mice had hyperplasia and preneoplastic changes as early as 12 weeks, and ER-positive mammary tumors occurred at a latency of 14 to 16 months. Mechanistic studies revealed that PELP1 deregulation altered expression of a number of known ER target genes involved in cellular proliferation (cyclin D1, CDKs) and morphogenesis (EGFR, MMPs) and such changes facilitated altered mammary gland morphogenesis and tumor progression. Furthermore, PELP1 was hyper-phosphorylated at its CDK phosphorylation site, suggesting an autocrine loop involving the CDK-cyclin D1-PELP1 axis in promoting mammary tumorigenesis. Treatment of PELP1 Tg mice with a KDM1 inhibitor significantly reduced PELP1-driven hyperbranching, reversed alterations in cyclin D1 expression levels, and reduced CDK-driven PELP1 phosphorylation. These results further support the hypothesis that PELP1 deregulation has the potential to promote breast tumorigenesis in vivo and represent a novel model for future investigation into molecular mechanisms of PELP1-mediated tumorigenesis.
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Affiliation(s)
- Valerie Cortez
- Department of Obstetrics and Gynecology, UT Health Science Center, San Antonio, Texas. Department of Cellular and Structural Biology, UT Health Science Center, San Antonio, Texas
| | - Cathy Samayoa
- Department of Obstetrics and Gynecology, UT Health Science Center, San Antonio, Texas. Department of Cellular and Structural Biology, UT Health Science Center, San Antonio, Texas
| | - Andrea Zamora
- Department of Obstetrics and Gynecology, UT Health Science Center, San Antonio, Texas
| | - Lizatte Martinez
- Department of Obstetrics and Gynecology, UT Health Science Center, San Antonio, Texas
| | - Rajeshwar R Tekmal
- Department of Obstetrics and Gynecology, UT Health Science Center, San Antonio, Texas. Cancer Therapy and Research Center, UT Health Science Center, San Antonio, Texas
| | - Ratna K Vadlamudi
- Department of Obstetrics and Gynecology, UT Health Science Center, San Antonio, Texas. Cancer Therapy and Research Center, UT Health Science Center, San Antonio, Texas.
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27
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Abstract
Prostate cancer is the commonest, non-cutaneous cancer in men. At present, there is no cure for the advanced, castration-resistant form of the disease. Estrogen has been shown to be important in prostate carcinogenesis, with evidence resulting from epidemiological, cancer cell line, human tissue and animal studies. The prostate expresses both estrogen receptor alpha (ERA) and estrogen receptor beta (ERB). Most evidence suggests that ERA mediates the harmful effects of estrogen in the prostate, whereas ERB is tumour suppressive, but trials of ERB-selective agents have not translated into improved clinical outcomes. The role of ERB in the prostate remains unclear and there is increasing evidence that isoforms of ERB may be oncogenic. Detailed study of ERB and ERB isoforms in the prostate is required to establish their cell-specific roles, in order to determine if therapies can be directed towards ERB-dependent pathways. In this review, we summarise evidence on the role of ERB in prostate cancer and highlight areas for future research.
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Affiliation(s)
- Adam W Nelson
- Cancer Research UKCambridge Institute, University of Cambridge, Robinson Way, Cambridge CB2 0RE, UKDepartment of UrologyAddenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 0QQ, UKDame Roma Mitchell Cancer Research LaboratoriesFaculty of Health Sciences, School of Medicine, The University of Adelaide, Level 4, Hanson Institute Building, DX Number 650 801, Adelaide, South Australia 5000, AustraliaDepartment of OncologyUniversity of Cambridge, Cambridge CB2 2QQ, UKCancer Research UKCambridge Institute, University of Cambridge, Robinson Way, Cambridge CB2 0RE, UKDepartment of UrologyAddenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 0QQ, UKDame Roma Mitchell Cancer Research LaboratoriesFaculty of Health Sciences, School of Medicine, The University of Adelaide, Level 4, Hanson Institute Building, DX Number 650 801, Adelaide, South Australia 5000, AustraliaDepartment of OncologyUniversity of Cambridge, Cambridge CB2 2QQ, UK
| | - Wayne D Tilley
- Cancer Research UKCambridge Institute, University of Cambridge, Robinson Way, Cambridge CB2 0RE, UKDepartment of UrologyAddenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 0QQ, UKDame Roma Mitchell Cancer Research LaboratoriesFaculty of Health Sciences, School of Medicine, The University of Adelaide, Level 4, Hanson Institute Building, DX Number 650 801, Adelaide, South Australia 5000, AustraliaDepartment of OncologyUniversity of Cambridge, Cambridge CB2 2QQ, UKCancer Research UKCambridge Institute, University of Cambridge, Robinson Way, Cambridge CB2 0RE, UKDepartment of UrologyAddenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 0QQ, UKDame Roma Mitchell Cancer Research LaboratoriesFaculty of Health Sciences, School of Medicine, The University of Adelaide, Level 4, Hanson Institute Building, DX Number 650 801, Adelaide, South Australia 5000, AustraliaDepartment of OncologyUniversity of Cambridge, Cambridge CB2 2QQ, UK
| | - David E Neal
- Cancer Research UKCambridge Institute, University of Cambridge, Robinson Way, Cambridge CB2 0RE, UKDepartment of UrologyAddenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 0QQ, UKDame Roma Mitchell Cancer Research LaboratoriesFaculty of Health Sciences, School of Medicine, The University of Adelaide, Level 4, Hanson Institute Building, DX Number 650 801, Adelaide, South Australia 5000, AustraliaDepartment of OncologyUniversity of Cambridge, Cambridge CB2 2QQ, UKCancer Research UKCambridge Institute, University of Cambridge, Robinson Way, Cambridge CB2 0RE, UKDepartment of UrologyAddenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 0QQ, UKDame Roma Mitchell Cancer Research LaboratoriesFaculty of Health Sciences, School of Medicine, The University of Adelaide, Level 4, Hanson Institute Building, DX Number 650 801, Adelaide, South Australia 5000, AustraliaDepartment of OncologyUniversity of Cambridge, Cambridge CB2 2QQ, UKCancer Research UKCambridge Institute, University of Cambridge, Robinson Way, Cambridge CB2 0RE, UKDepartment of UrologyAddenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 0QQ, UKDame Roma Mitchell Cancer Research LaboratoriesFaculty of Health Sciences, School of Medicine, The University of Adelaide, Level 4, Hanson Institute Building, DX Number 650 801, Adelaide, South Australia 5000, AustraliaDepartment of OncologyUniversity of Cambridge, Cambridge CB2 2QQ, UK
| | - Jason S Carroll
- Cancer Research UKCambridge Institute, University of Cambridge, Robinson Way, Cambridge CB2 0RE, UKDepartment of UrologyAddenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 0QQ, UKDame Roma Mitchell Cancer Research LaboratoriesFaculty of Health Sciences, School of Medicine, The University of Adelaide, Level 4, Hanson Institute Building, DX Number 650 801, Adelaide, South Australia 5000, AustraliaDepartment of OncologyUniversity of Cambridge, Cambridge CB2 2QQ, UKCancer Research UKCambridge Institute, University of Cambridge, Robinson Way, Cambridge CB2 0RE, UKDepartment of UrologyAddenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 0QQ, UKDame Roma Mitchell Cancer Research LaboratoriesFaculty of Health Sciences, School of Medicine, The University of Adelaide, Level 4, Hanson Institute Building, DX Number 650 801, Adelaide, South Australia 5000, AustraliaDepartment of OncologyUniversity of Cambridge, Cambridge CB2 2QQ, UK
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28
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Gonugunta VK, Miao L, Sareddy GR, Ravindranathan P, Vadlamudi R, Raj GV. The social network of PELP1 and its implications in breast and prostate cancers. Endocr Relat Cancer 2014; 21:T79-86. [PMID: 24859989 DOI: 10.1530/erc-13-0502] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Proline, glutamic acid- and leucine-rich protein 1 (PELP1) is a multi-domain scaffold protein that serves as a platform for various protein-protein interactions between steroid receptors (SRs) and signaling factors and cell cycle, transcriptional, cytoskeletal, and epigenetic remodelers. PELP1 is known to be a coregulator of transcription and participates in the nuclear and extranuclear functions of SRs, ribosome biogenesis, and cell cycle progression. The expression and localization of PELP1 are dysregulated in hormonal cancers including breast and prostate cancers. This review focuses on the interactive functions and therapeutic and prognostic significance of PELP1 in breast and prostate cancers.
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Affiliation(s)
- Vijay K Gonugunta
- Department of UrologyUT Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard J8130, Dallas, Texas 75390, USADepartment of Obstetrics and GynecologyUT Health Science Center, San Antonio, Texas, USA
| | - Lu Miao
- Department of UrologyUT Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard J8130, Dallas, Texas 75390, USADepartment of Obstetrics and GynecologyUT Health Science Center, San Antonio, Texas, USA
| | - Gangadhara R Sareddy
- Department of UrologyUT Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard J8130, Dallas, Texas 75390, USADepartment of Obstetrics and GynecologyUT Health Science Center, San Antonio, Texas, USA
| | - Preethi Ravindranathan
- Department of UrologyUT Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard J8130, Dallas, Texas 75390, USADepartment of Obstetrics and GynecologyUT Health Science Center, San Antonio, Texas, USA
| | - Ratna Vadlamudi
- Department of UrologyUT Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard J8130, Dallas, Texas 75390, USADepartment of Obstetrics and GynecologyUT Health Science Center, San Antonio, Texas, USA
| | - Ganesh V Raj
- Department of UrologyUT Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard J8130, Dallas, Texas 75390, USADepartment of Obstetrics and GynecologyUT Health Science Center, San Antonio, Texas, USA
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29
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Stanniocalcin-1 promotes metastasis in a human breast cancer cell line through activation of PI3K. Clin Exp Metastasis 2014; 31:787-94. [PMID: 25056605 DOI: 10.1007/s10585-014-9668-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Accepted: 07/07/2014] [Indexed: 01/22/2023]
Abstract
Stanniocalcin-l (STC-1) is a secreted glycoprotein hormone that regulates calcium and phosphate homeostasis. STC-1 expression is upregulated in several cancers including breast cancer, and has been shown to be prognostic. Although these clinical observations implicate STC-1 as a potential tumor marker, it is still unclear whether STC-1 confers a malignant phenotype. In this study, this question was addressed by overexpressing STC-1 in the human breast cancer cell line MDA-MB-231 and examining the resultant phenotype in vitro and in vivo. Overexpression of STC-1 enhanced invasiveness of MDA-MB-231 cells in vitro and promoted their lung metastasis in vivo, while having no effect on proliferation, adhesion, or proteinase activity. The addition of soluble STC-1 to MDA-MB-231 cultures resulted in the activation of the phosphoinositide 3-kinase (PI3K)/Akt signaling pathway, suggesting a mechanistic basis for the observed increases in cell motility and metastasis. Taken together, it was indicated that secreted STC-1 promotes metastatic potential of breast cancer cells via activation of PI3K/AKT.
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30
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The pattern of proline, glutamic acid, and leucine-rich protein 1 expression in Chinese women with primary breast cancer. Int J Biol Markers 2014; 29:e1-7. [PMID: 24627205 DOI: 10.5301/jbm.5000078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2014] [Indexed: 11/20/2022]
Abstract
BACKGROUND Disparities of biomarkers' expression in breast cancer across different races and ethnicities have been well documented. Proline, glutamic acid, and leucine-rich protein 1 (PELP1), a novel ER coregulator, has been considered as a promising biomarker of breast cancer prognosis; however, the pattern of PELP1 expression in Chinese women with breast cancer has never been investigated. This study aims to provide useful reference on possible racial or ethnic differences of PELP1 expression in breast cancer by exploring the pattern of PELP1 expression in Chinese women with primary breast cancer. METHODS The expression of PELP1 in primary breast cancer samples from 130 Chinese female patients was detected by immunohistochemistry and correlated to other clinicopathological parameters; for comparison, the expression of PELP1 in 26 benign breast fibroadenomas was also examined. RESULTS The overall value of the PELP1 H-score in breast cancer was significantly higher than that in breast fibroadenoma (p<0.001). In our breast cancer patients, the ER/HER-2-positive group had significantly higher PELP1 H-scores than their negative counterparts (p=0.003 for ER and p=0.022 for HER-2); the Ki-67-high group also showed significantly higher PELP1 H-scores than the Ki-67-low group (p=0.008). No significant association between PELP1 H-scores and other clinicopathological parameters was found. Finally, the PELP1 H-score in breast cancers of the luminal B subtype was significantly higher than that in the triple negative subtype (p=0.002). CONCLUSION Overexpression of PELP1 in Chinese women with primary breast cancer appears to be associated with biomarkers of poor outcome; these results are similar to other reports based on Western populations.
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Girard BJ, Daniel AR, Lange CA, Ostrander JH. PELP1: a review of PELP1 interactions, signaling, and biology. Mol Cell Endocrinol 2014; 382:642-651. [PMID: 23933151 PMCID: PMC3844065 DOI: 10.1016/j.mce.2013.07.031] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 07/29/2013] [Accepted: 07/29/2013] [Indexed: 11/29/2022]
Abstract
Proline, glutamic acid, and leucine rich protein 1 (PELP1) is a large multi-domain protein that has been shown to modulate an increasing number of pathways and biological processes. The first reports describing the cloning and characterization of PELP1 showed that it was an estrogen receptor coactivator. PELP1 has now been shown to be a coregulator for a growing number of transcription factors. Furthermore, recent reports have shown that PELP1 is a member of chromatin remodeling complexes. In addition to PELP1 nuclear functions, it has been shown to have cytoplasmic signaling functions as well. In the cytoplasm PELP1 acts as a scaffold molecule and mediates rapid signaling from growth factor and hormone receptors. PELP1 signaling ultimately plays a role in cancer biology by increasing proliferation and metastasis, among other cellular processes. Here we will review (1) the cloning and characterization of PELP1 expression, (2) interacting proteins, (3) PELP1 signaling, and (4) PELP1-mediated biology.
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Affiliation(s)
- Brian J Girard
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, United States
| | - Andrea R Daniel
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, United States
| | - Carol A Lange
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, United States
| | - Julie H Ostrander
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, United States.
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Huleihel L, Ben-Yehudah A, Milosevic J, Yu G, Pandit K, Sakamoto K, Yousef H, LeJeune M, Coon TA, Redinger CJ, Chensny L, Manor E, Schatten G, Kaminski N. Let-7d microRNA affects mesenchymal phenotypic properties of lung fibroblasts. Am J Physiol Lung Cell Mol Physiol 2014; 306:L534-42. [PMID: 24441869 DOI: 10.1152/ajplung.00149.2013] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
MicroRNAs are small noncoding RNAs that inhibit protein expression. We have previously shown that the inhibition of the microRNA let-7d in epithelial cells caused changes consistent with epithelial-to-mesenchymal transition (EMT) both in vitro and in vivo. The aim of this study was to determine whether the introduction of let-7d into fibroblasts alters their mesenchymal properties. Transfection of primary fibroblasts with let-7d caused a decrease in expression of the mesenchymal markers α-smooth muscle actin, N-cadherin, fibroblast-specific protein-1, and fibronectin, as well as an increase in the epithelial markers tight junction protein-1 and keratin 19. Phenotypic changes were also present, including a delay in wound healing, reduced motility, and proliferation of fibroblasts following transfection. In addition, we examined the effects of transfection on fibroblast responsiveness to TGF-β, an important factor in many fibrotic processes such as lung fibrosis and found that let-7d transfection significantly attenuated high-mobility group-A2 protein induction by TGF-β. Our results indicate that administration of the epithelial microRNA let-7d can significantly alter the phenotype of primary fibroblasts.
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Affiliation(s)
- Luai Huleihel
- Yale Univ., School of Medicine, 300 Cedar St., TAC-441 South, New Haven, CT 06520.
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Peptidomimetic targeting of critical androgen receptor-coregulator interactions in prostate cancer. Nat Commun 2013; 4:1923. [PMID: 23715282 DOI: 10.1038/ncomms2912] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Accepted: 04/18/2013] [Indexed: 01/27/2023] Open
Abstract
The growth of advanced prostate cancer depends on androgen receptor signalling, however treatment options are limited. Here we report the disruption of specific protein-protein interactions involving LXXLL motifs in androgen receptor-coregulator proteins such as PELP1 using a novel, small molecule peptidomimetic (D2). D2 is stable, non-toxic and efficiently taken up by prostate cancer cells. Importantly, D2 blocks androgen-induced nuclear uptake and genomic activity of the androgen receptor. Furthermore, D2 abrogates androgen-induced proliferation of prostate cancer cells in vitro with an IC50 of 40 nM, and inhibits tumour growth in a mouse xenograft model. D2 also disrupts androgen receptor-coregulator interactions in ex vivo cultures of primary human prostate tumours. These findings provide evidence that targeting androgen receptor-coregulator interactions using peptidomimetics may be a viable therapeutic approach for patients with advanced prostate cancer.
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Significance of PELP1/HDAC2/miR-200 regulatory network in EMT and metastasis of breast cancer. Oncogene 2013; 33:3707-16. [PMID: 23975430 PMCID: PMC3935988 DOI: 10.1038/onc.2013.332] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 05/25/2013] [Accepted: 06/19/2013] [Indexed: 02/07/2023]
Abstract
Tumor metastasis is the leading cause of death among breast cancer patients. PELP1 is a nuclear receptor coregulator that is upregulated during breast cancer progression to metastasis and is an independent prognostic predictor of shorter survival of breast cancer patients. Here, we show that PELP1 modulates expression of metastasis-influencing microRNAs (miRs) to promote cancer metastasis. Whole genome miR array analysis using PELP1 over expressing and under expressing model cells revealed that miR-200a and miR-141 levels inversely correlated with PELP1 expression. Consistent with this, PELP1 knockdown resulted in lower expression of miR-200a target genes ZEB1 and ZEB2. PELP1 knockdown significantly reduced tumor growth and metastasis compared with parental cells in an orthotopic xenograft tumor model. Furthermore, re-introduction of miR-200a and miR-141 mimetics into PELP1 overexpressing cells reversed PELP1 target gene expression, decreased PELP1 driven migration/invasion in vitro, and significantly reduced in vivo metastatic potential in a preclinical model of experimental metastasis. Our results demonstrated that PELP1 binds to miR-200a and miR-141 promoters and regulates their expression by recruiting chromatin modifier HDAC2 as revealed by ChIP, siRNA and HDAC inhibitor assays. Taken together, our results suggest that PELP1 regulates tumor metastasis by controlling the expression and functions of the tumor metastasis suppressors miR-200a and miR-141.
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Meng W, Ye Z, Cui R, Perry J, Dedousi-Huebner V, Huebner A, Wang Y, Li B, Volinia S, Nakanishi H, Kim T, Suh SS, Ayers LW, Ross P, Croce CM, Chakravarti A, Jin VX, Lautenschlaeger T. MicroRNA-31 predicts the presence of lymph node metastases and survival in patients with lung adenocarcinoma. Clin Cancer Res 2013; 19:5423-33. [PMID: 23946296 DOI: 10.1158/1078-0432.ccr-13-0320] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
PURPOSE We conducted genome-wide miRNA-sequencing (miRNA-seq) in primary cancer tissue from patients of lung adenocarcinoma to identify markers for the presence of lymph node metastasis. EXPERIMENTAL DESIGN Markers for lymph node metastasis identified by sequencing were validated in a separate cohort using quantitative PCR. After additional validation in the The Cancer Genome Atlas (TCGA) dataset, functional characterization studies were conducted in vitro. RESULTS MiR-31 was upregulated in lung adenocarcinoma tissues from patients with lymph node metastases compared with those without lymph node metastases. We confirmed miR-31 to be upregulated in lymph node-positive patients in a separate patient cohort (P = 0.009, t test), and to be expressed at higher levels in adenocarcinoma tissue than in matched normal adjacent lung tissues (P < 0.0001, paired t test). MiR-31 was then validated as a marker for lymph node metastasis in an external validation cohort of 233 lung adenocarcinoma cases of the TCGA (P = 0.031, t test). In vitro functional assays showed that miR-31 increases cell migration, invasion, and proliferation in an ERK1/2 signaling-dependent manner. Notably, miR-31 was a significant predictor of survival in a multivariate cox regression model even when controlling for cancer staging. Exploratory in silico analysis showed that low expression of miR-31 is associated with excellent survival for T2N0 patients. CONCLUSIONS We applied miRNA-seq to study microRNomes in lung adenocarcinoma tissue samples for the first time and potentially identified a miRNA predicting the presence of lymph node metastasis and survival outcomes in patients of lung adenocarcinoma.
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Affiliation(s)
- Wei Meng
- Authors' Affiliations: Department of Molecular Medicine, The University of Texas Health Science Center, San Antonio, Texas; Department of Radiation Oncology, Department of Molecular Virology, Immunology and Medical Genetics; Comprehensive Cancer Center; Department of Pathology, College of Medicine; Department of Surgery, Division of Thoracic Surgery, The Ohio State University, Columbus, Ohio; and Yanbian University College of Medicine, Ji Lin, China
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Wan J, Li X. PELP1/MNAR suppression inhibits proliferation and metastasis of endometrial carcinoma cells. Oncol Rep 2012; 28:2035-42. [PMID: 22992812 DOI: 10.3892/or.2012.2038] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 07/17/2012] [Indexed: 11/06/2022] Open
Abstract
Proline-, glutamic acid- and leucine-rich protein-1/modulator of non-genomic activity of estrogen receptor (ER) (PELP1/MNAR) is a novel nuclear receptor (NR) co-activator that plays an essential role in the actions of ER. Emerging findings suggest that PELP1/MNAR is a novel proto-oncogene, whose expression is deregulated in several hormone-responsive cancers, including endometrial cancer. In this study, we demonstrate that PELP1/MNAR is widely expressed in endometrial carcinoma cell lines. To investigate its possible role in endometrial carcinoma progression, we adopted an RNA interference technology to downregulate PELP1/MNAR expression in Ishikawa endometrial carcinoma cells. PELP1/MNAR downregulation substantially reduced cell proliferation, and the cells in which PELP1/MNAR expression was knocked down also exhibited a decreased migration and invasion ability, as shown by Boyden chamber and invasion assays. The results showed that the expression of MMP-2 and MMP-9 was also decreased. These results suggest that PELP1/MNAR plays a role in endometrial cancer progression and metastasis, and that PELP1/MNAR may be a potential therapeutic target for endometrial cancer.
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Affiliation(s)
- Jing Wan
- Department of Gynecology and Obstetrics, The Third Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510630, PR China
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