1
|
Zhang S, Zhou H, Zhang L, Zhu C, Du X, Wang L, Chen H, Liu J. Lysophosphatidic acid responsive photosensitive supramolecular organic frameworks for tumor imaging, drug loading, and photodynamic therapy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 310:123923. [PMID: 38277782 DOI: 10.1016/j.saa.2024.123923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 01/18/2024] [Accepted: 01/19/2024] [Indexed: 01/28/2024]
Abstract
Supramolecular organic frameworks have been widely applied for biological detection and drug delivery. In this study, a supramolecular organic framework (SOF) is constructed through the self-assembly of a highly photosensitive triarylphosphine oxide guest molecule, OTPP-6-Methyl, with cucurbit [8] uril (CB [8]). The formation of the SOF gradually enhances the weak fluorescence of OTPP-6-Methyl owing to the restriction of the molecular folding motion. Although the high positive charge of OTPP-6-Methyl facilitates binding to various negatively charged substances, the SOF system only demonstrated an obvious fluorescence response to LPA, a biomarker of ovarian cancer, via the disassembly of SOF and subsequent binding of OTPP-6-Methyl with LPA. The fluorescence changes during the entire process are insufficient to allow the sensitive detection of LPA; thus, we further designed a FRET system by introducing Cy5, which can act as an energy receptor to achieve a ratiometric readout for LPA. The tumor-targeting cRGD group was introduced into the SOF system as part of another guest molecule, OTPP-5-M-1-cRGD, to improve the tumor-targeting ability of the SOF system. The SOF system further improves the photosensitivity of guest molecules, and is therefore used in the in vivo imaging of ovarian cancer subcutaneous tumors and as a DDS for loading DOX for the combined in vivo chemotherapy and photodynamic treatment of tumors.
Collapse
Affiliation(s)
- Shilu Zhang
- School of Pharmacy, Thyriod and Breast Surgery, Medical Imaging Key Laboratory of Sichuan Province, Affiliated Hospital of North Sichuan Medical College, North Sichuan Medical College, Sichuan 637100, China
| | - Huang Zhou
- School of Pharmacy, Thyriod and Breast Surgery, Medical Imaging Key Laboratory of Sichuan Province, Affiliated Hospital of North Sichuan Medical College, North Sichuan Medical College, Sichuan 637100, China
| | - Liang Zhang
- School of Pharmacy, Thyriod and Breast Surgery, Medical Imaging Key Laboratory of Sichuan Province, Affiliated Hospital of North Sichuan Medical College, North Sichuan Medical College, Sichuan 637100, China
| | - Caiqiong Zhu
- School of Pharmacy, Thyriod and Breast Surgery, Medical Imaging Key Laboratory of Sichuan Province, Affiliated Hospital of North Sichuan Medical College, North Sichuan Medical College, Sichuan 637100, China
| | - Xinyi Du
- School of Pharmacy, Thyriod and Breast Surgery, Medical Imaging Key Laboratory of Sichuan Province, Affiliated Hospital of North Sichuan Medical College, North Sichuan Medical College, Sichuan 637100, China
| | - Linjing Wang
- School of Pharmacy, Thyriod and Breast Surgery, Medical Imaging Key Laboratory of Sichuan Province, Affiliated Hospital of North Sichuan Medical College, North Sichuan Medical College, Sichuan 637100, China
| | - Hongyu Chen
- School of Pharmacy, Thyriod and Breast Surgery, Medical Imaging Key Laboratory of Sichuan Province, Affiliated Hospital of North Sichuan Medical College, North Sichuan Medical College, Sichuan 637100, China.
| | - Jun Liu
- School of Pharmacy, Thyriod and Breast Surgery, Medical Imaging Key Laboratory of Sichuan Province, Affiliated Hospital of North Sichuan Medical College, North Sichuan Medical College, Sichuan 637100, China.
| |
Collapse
|
2
|
Rani S, Lai A, Nair S, Sharma S, Handberg A, Carrion F, Möller A, Salomon C. Extracellular vesicles as mediators of cell-cell communication in ovarian cancer and beyond - A lipids focus. Cytokine Growth Factor Rev 2023; 73:52-68. [PMID: 37423866 DOI: 10.1016/j.cytogfr.2023.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 06/29/2023] [Indexed: 07/11/2023]
Abstract
Extracellular vesicles (EVs) are messengers that carry information in the form of proteins, lipids, and nucleic acids and are not only essential for intercellular communication but also play a critical role in the progression of various pathologies, including ovarian cancer. There has been recent substantial research characterising EV cargo, specifically, the lipid profile of EVs. Lipids are involved in formation and cargo sorting of EVs, their release and cellular uptake. Numerous lipidomic studies demonstrated the enrichment of specific classes of lipids in EVs derived from cancer cells suggesting that the EV associated lipids can potentially be employed as minimally invasive biomarkers for early diagnosis of various malignancies, including ovarian cancer. In this review, we aim to provide a general overview of the heterogeneity of EV, biogenesis, their lipid content, and function in cancer progression focussing on ovarian cancer.
Collapse
Affiliation(s)
- Shikha Rani
- Translational Extracellular Vesicles in Obstetrics and Gynae-Oncology Group, University of Queensland Centre for Clinical Research, Faculty of Medicine, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, QLD 4029, Australia
| | - Andrew Lai
- Translational Extracellular Vesicles in Obstetrics and Gynae-Oncology Group, University of Queensland Centre for Clinical Research, Faculty of Medicine, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, QLD 4029, Australia
| | - Soumya Nair
- Translational Extracellular Vesicles in Obstetrics and Gynae-Oncology Group, University of Queensland Centre for Clinical Research, Faculty of Medicine, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, QLD 4029, Australia
| | - Shayna Sharma
- Translational Extracellular Vesicles in Obstetrics and Gynae-Oncology Group, University of Queensland Centre for Clinical Research, Faculty of Medicine, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, QLD 4029, Australia
| | - Aase Handberg
- Department of Clinical Biochemistry, Aalborg University Hospital, Aalborg, Denmark
| | - Flavio Carrion
- Departamento de Investigación, Postgrado y Educación Continua (DIPEC), Facultad de Ciencias de la Salud, Universidad del Alba, Santiago, Chile
| | - Andreas Möller
- Department of Otorhinolaryngology, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Shatin, Hong Kong
| | - Carlos Salomon
- Translational Extracellular Vesicles in Obstetrics and Gynae-Oncology Group, University of Queensland Centre for Clinical Research, Faculty of Medicine, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, QLD 4029, Australia; Departamento de Investigación, Postgrado y Educación Continua (DIPEC), Facultad de Ciencias de la Salud, Universidad del Alba, Santiago, Chile.
| |
Collapse
|
3
|
Geng Z, Pan X, Xu J, Jia X. Friend and foe: the regulation network of ascites components in ovarian cancer progression. J Cell Commun Signal 2023; 17:391-407. [PMID: 36227507 PMCID: PMC10409702 DOI: 10.1007/s12079-022-00698-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 09/11/2022] [Indexed: 10/17/2022] Open
Abstract
The tumor microenvironment (TME) and its complex role in cancer progression have been hotspots of cancer research in recent years. Ascites, which occurs frequently in patients with ovarian cancer especially in advanced stages, represents a unique TME. Malignant ascites contains abundant cellular and acellular components that play important roles in tumorigenesis, growth, metastasis, and chemoresistance of ovarian cancer through complex molecular mechanisms and signaling pathways. As a valuable liquid biopsy sample, ascites fluid is also of great significance for the prognostic analysis of ovarian cancer. The components of ovarian cancer ascites are generally considered to comprise tumor-promoting factors; however, in recent years studies have found that ascites also contains tumor-suppressing factors, raising new perspectives on interactions between ascites and tumors. Malignant ascites directly constitutes the ovarian cancer microenvironment, therefore, the study of its components will aid in the development of new therapeutic strategies. This article reviews the current research on tumor-promoting and tumor-suppressing factors and molecular mechanisms of their actions in ovarian cancer-derived ascites and therapeutic strategies targeting ascites, which may provide references for the development of novel therapeutic targets for ovarian cancer in the future.
Collapse
Affiliation(s)
- Zhe Geng
- Department of Gynecology, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, 123 Mochou Rd, Nanjing, 210004, China
| | - Xinxing Pan
- Department of Gynecology, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, 123 Mochou Rd, Nanjing, 210004, China
| | - Juan Xu
- Department of Gynecology, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, 123 Mochou Rd, Nanjing, 210004, China.
| | - Xuemei Jia
- Department of Gynecology, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, 123 Mochou Rd, Nanjing, 210004, China.
| |
Collapse
|
4
|
Ojasalu K, Lieber S, Sokol AM, Nist A, Stiewe T, Bullwinkel I, Finkernagel F, Reinartz S, Müller-Brüsselbach S, Grosse R, Graumann J, Müller R. The lysophosphatidic acid-regulated signal transduction network in ovarian cancer cells and its role in actomyosin dynamics, cell migration and entosis. Theranostics 2023; 13:1921-1948. [PMID: 37064875 PMCID: PMC10091871 DOI: 10.7150/thno.81656] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 02/25/2023] [Indexed: 04/18/2023] Open
Abstract
Lysophosphatidic acid (LPA) species accumulate in the ascites of ovarian high-grade serous cancer (HGSC) and are associated with short relapse-free survival. LPA is known to support metastatic spread of cancer cells by activating a multitude of signaling pathways via G-protein-coupled receptors of the LPAR family. Systematic unbiased analyses of the LPA-regulated signal transduction network in ovarian cancer cells have, however, not been reported to date. Methods: LPA-induced signaling pathways were identified by phosphoproteomics of both patient-derived and OVCAR8 cells, RNA sequencing, measurements of intracellular Ca2+ and cAMP as well as cell imaging. The function of LPARs and downstream signaling components in migration and entosis were analyzed by selective pharmacological inhibitors and RNA interference. Results: Phosphoproteomic analyses identified > 1100 LPA-regulated sites in > 800 proteins and revealed interconnected LPAR1, ROCK/RAC, PKC/D and ERK pathways to play a prominent role within a comprehensive signaling network. These pathways regulate essential processes, including transcriptional responses, actomyosin dynamics, cell migration and entosis. A critical component of this signaling network is MYPT1, a stimulatory subunit of protein phosphatase 1 (PP1), which in turn is a negative regulator of myosin light chain 2 (MLC2). LPA induces phosphorylation of MYPT1 through ROCK (T853) and PKC/ERK (S507), which is majorly driven by LPAR1. Inhibition of MYPT1, PKC or ERK impedes both LPA-induced cell migration and entosis, while interference with ROCK activity and MLC2 phosphorylation selectively blocks entosis, suggesting that MYPT1 figures in both ROCK/MLC2-dependent and -independent pathways. We finally show a novel pathway governed by LPAR2 and the RAC-GEF DOCK7 to be indispensable for the induction of entosis. Conclusion: We have identified a comprehensive LPA-induced signal transduction network controlling LPA-triggered cytoskeletal changes, cell migration and entosis in HGSC cells. Due to its pivotal role in this network, MYPT1 may represent a promising target for interfering with specific functions of PP1 essential for HGSC progression.
Collapse
Affiliation(s)
- Kaire Ojasalu
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
| | - Sonja Lieber
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
| | - Anna M. Sokol
- Biomolecular Mass Spectrometry, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Andrea Nist
- Genomics Core Facility, Philipps University, Marburg, Germany
| | - Thorsten Stiewe
- Genomics Core Facility, Philipps University, Marburg, Germany
| | - Imke Bullwinkel
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
| | - Florian Finkernagel
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
- Bioinformatics Core Facility, Philipps University, Marburg, Germany
| | - Silke Reinartz
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
| | - Sabine Müller-Brüsselbach
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
| | - Robert Grosse
- Institut for Experimental and Clinical Pharmacology and Toxicology, Albert-Ludwigs University, Freiburg, Germany
| | - Johannes Graumann
- Biomolecular Mass Spectrometry, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
- Institute for Translational Proteomics, Philipps University, Marburg, Germany
| | - Rolf Müller
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
- ✉ Corresponding author: Rolf Müller, Center for Tumor Biology and Immunology (ZTI), Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany. . Phone: +49 6421 2866236
| |
Collapse
|
5
|
Rasheed SAK, Subramanyan LV, Lim WK, Udayappan UK, Wang M, Casey PJ. The emerging roles of Gα12/13 proteins on the hallmarks of cancer in solid tumors. Oncogene 2022; 41:147-158. [PMID: 34689178 PMCID: PMC8732267 DOI: 10.1038/s41388-021-02069-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 09/28/2021] [Accepted: 10/06/2021] [Indexed: 01/14/2023]
Abstract
G12 proteins comprise a subfamily of G-alpha subunits of heterotrimeric GTP-binding proteins (G proteins) that link specific cell surface G protein-coupled receptors (GPCRs) to downstream signaling molecules and play important roles in human physiology. The G12 subfamily contains two family members: Gα12 and Gα13 (encoded by the GNA12 and GNA13 genes, respectively) and, as with all G proteins, their activity is regulated by their ability to bind to guanine nucleotides. Increased expression of both Gα12 and Gα13, and their enhanced signaling, has been associated with tumorigenesis and tumor progression of multiple cancer types over the past decade. Despite these strong associations, Gα12/13 proteins are underappreciated in the field of cancer. As our understanding of G protein involvement in oncogenic signaling has evolved, it has become clear that Gα12/13 signaling is pleotropic and activates specific downstream effectors in different tumor types. Further, the expression of Gα12/13 proteins is regulated through a series of transcriptional and post-transcriptional mechanisms, several of which are frequently deregulated in cancer. With the ever-increasing understanding of tumorigenic processes driven by Gα12/13 proteins, it is becoming clear that targeting Gα12/13 signaling in a context-specific manner could provide a new strategy to improve therapeutic outcomes in a number of solid tumors. In this review, we detail how Gα12/13 proteins, which were first discovered as proto-oncogenes, are now known to drive several "classical" hallmarks, and also play important roles in the "emerging" hallmarks, of cancer.
Collapse
Affiliation(s)
| | | | - Wei Kiang Lim
- Program in Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore, 169857, Singapore
| | - Udhaya Kumari Udayappan
- Program in Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore, 169857, Singapore
| | - Mei Wang
- Program in Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore, 169857, Singapore
| | - Patrick J Casey
- Program in Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore, 169857, Singapore.
- Dept. of Pharmacology and Cancer Biology, Duke Univ. Medical Center, Durham, NC, 27710, USA.
| |
Collapse
|
6
|
Mandal S, Chakrabarty D, Bhattacharya A, Paul J, Haldar S, Pal K. miRNA regulation of G protein-coupled receptor mediated angiogenic pathways in cancer. THE NUCLEUS 2021. [DOI: 10.1007/s13237-021-00365-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
|
7
|
LI NS, CHEN L, XIAO ZX, YANG YQ, AI KL. Progress in Detection of Biomarker of Ovarian Cancer: Lysophosphatidic Acid. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2020. [DOI: 10.1016/s1872-2040(20)60062-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
8
|
Wang W, Wu J, Mukherjee A, He T, Wang XY, Ma Y, Fang X. Lysophosphatidic acid induces tumor necrosis factor-alpha to regulate a pro-inflammatory cytokine network in ovarian cancer. FASEB J 2020; 34:13935-13948. [PMID: 32851734 DOI: 10.1096/fj.202001136r] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 08/06/2020] [Accepted: 08/07/2020] [Indexed: 12/13/2022]
Abstract
Epithelial ovarian carcinoma tissues express high levels of tumor necrosis factor-alpha (TNF-α) and other inflammatory cytokines. The underlying mechanism leading to the abnormal TNF-α expression in ovarian cancer remains poorly understood. In the current study, we demonstrated that lysophosphatidic acid (LPA), a lipid mediator present in ascites of ovarian cancer patients, induced expression of TNF-α mRNA and release of TNF-α protein in ovarian cancer cells. LPA also induced expression of interleukin-1β (IL-1β) mRNA but no significant increase in IL-1β protein was detected. LPA enhanced TNF-α mRNA through NF-κB-mediated transcriptional activation. Inactivation of ADAM17, a disintegrin and metalloproteinase, with a specific inhibitor TMI-1 or by shRNA knockdown prevented ovarian cancer cells from releasing TNF-α protein in response to LPA, indicating that LPA-mediated TNF-α production relies on both transcriptional upregulations of the TNF-α gene and the activity of ADAM17, the membrane-associated TNF-α-converting enzyme. Like many other biological responses to LPA, induction of TNF-α by LPA also depended on the transactivation of the epidermal growth factor receptor (EGFR). Interestingly, our results revealed that ADAM17 was also the shedding protease responsible for the transactivation of EGFR by LPA in ovarian cancer cells. To explore the biological outcomes of LPA-induced TNF-α, we examined the effects of a TNF-α neutralizing antibody and recombinant TNF-α soluble receptor on LPA-stimulated expression of pro-tumorigenic cytokines and chemokines overexpressed in ovarian cancer. Blockade of TNF-α signaling significantly reduced the production of IL-8, IL-6, and CXCL1, suggesting a hierarchy of mechanisms contributing to the robust expression of the inflammatory mediators in response to LPA in ovarian cancer cells. In contrast, TNF-α inhibition did not affect LPA-dependent cell proliferation. Taken together, our results establish that the bioactive lipid LPA drives the expression of TNF-α to regulate an inflammatory network in ovarian cancer.
Collapse
Affiliation(s)
- Wei Wang
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA, USA
| | - Jinhua Wu
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA, USA
| | - Abir Mukherjee
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA, USA
| | - Tianhai He
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA, USA
| | - Xiang-Yang Wang
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Yibao Ma
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA, USA
| | - Xianjun Fang
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA, USA
| |
Collapse
|
9
|
Strassheim D, Karoor V, Nijmeh H, Weston P, Lapel M, Schaack J, Sullivan T, Dempsey EC, Stenmark KR, Gerasimovskaya E. c-Jun, Foxo3a, and c-Myc Transcription Factors are Key Regulators of ATP-Mediated Angiogenic Responses in Pulmonary Artery Vasa Vasorum Endothelial Cells. Cells 2020; 9:cells9020416. [PMID: 32054096 PMCID: PMC7072142 DOI: 10.3390/cells9020416] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 12/14/2022] Open
Abstract
Angiogenic vasa vasorum (VV) expansion plays an essential role in the pathogenesis of hypoxia-induced pulmonary hypertension (PH), a cardiovascular disease. We previously showed that extracellular ATP released under hypoxic conditions is an autocrine/paracrine, the angiogenic factor for pulmonary artery (PA) VV endothelial cells (VVECs), acting via P2Y purinergic receptors (P2YR) and the Phosphoinositide 3-kinase (PI3K)-Akt-Mammalian Target of Rapamycin (mTOR) signaling. To further elucidate the molecular mechanisms of ATP-mediated VV angiogenesis, we determined the profile of ATP-inducible transcription factors (TFs) in VVECs using a TranSignal protein/DNA array. C-Jun, c-Myc, and Foxo3 were found to be upregulated in most VVEC populations and formed nodes connecting several signaling networks. siRNA-mediated knockdown (KD) of these TFs revealed their critical role in ATP-induced VVEC angiogenic responses and the regulation of downstream targets involved in tissue remodeling, cell cycle control, expression of endothelial markers, cell adhesion, and junction proteins. Our results showed that c-Jun was required for the expression of ATP-stimulated angiogenic genes, c-Myc was repressive to anti-angiogenic genes, and Foxo3a predominantly controlled the expression of anti-apoptotic and junctional proteins. The findings from our study suggest that pharmacological targeting of the components of P2YR-PI3K-Akt-mTOR axis and specific TFs reduced ATP-mediated VVEC angiogenic response and may have a potential translational significance in attenuating pathological vascular remodeling.
Collapse
Affiliation(s)
- Derek Strassheim
- Department of Medicine Cardiovascular and Pulmonary Research Laboratory, University of Colorado Denver, Aurora, CO 80045, USA; (D.S.); (V.K.); (T.S.); (E.C.D.); (K.R.S.)
| | - Vijaya Karoor
- Department of Medicine Cardiovascular and Pulmonary Research Laboratory, University of Colorado Denver, Aurora, CO 80045, USA; (D.S.); (V.K.); (T.S.); (E.C.D.); (K.R.S.)
| | - Hala Nijmeh
- Department of Pediatrics, Division of Critical Care Medicine, University of Colorado Denver, Aurora, CO 80045, USA; (H.N.); (P.W.); (M.L.)
| | - Philip Weston
- Department of Pediatrics, Division of Critical Care Medicine, University of Colorado Denver, Aurora, CO 80045, USA; (H.N.); (P.W.); (M.L.)
| | - Martin Lapel
- Department of Pediatrics, Division of Critical Care Medicine, University of Colorado Denver, Aurora, CO 80045, USA; (H.N.); (P.W.); (M.L.)
| | - Jerome Schaack
- Department of Microbiology, University of Colorado Denver, Aurora, CO 80045, USA;
| | - Timothy Sullivan
- Department of Medicine Cardiovascular and Pulmonary Research Laboratory, University of Colorado Denver, Aurora, CO 80045, USA; (D.S.); (V.K.); (T.S.); (E.C.D.); (K.R.S.)
| | - Edward C. Dempsey
- Department of Medicine Cardiovascular and Pulmonary Research Laboratory, University of Colorado Denver, Aurora, CO 80045, USA; (D.S.); (V.K.); (T.S.); (E.C.D.); (K.R.S.)
- Rocky Mountain Regional VA Medical Center, Aurora, CO 80045, USA
| | - Kurt R. Stenmark
- Department of Medicine Cardiovascular and Pulmonary Research Laboratory, University of Colorado Denver, Aurora, CO 80045, USA; (D.S.); (V.K.); (T.S.); (E.C.D.); (K.R.S.)
- Department of Pediatrics, Division of Critical Care Medicine, University of Colorado Denver, Aurora, CO 80045, USA; (H.N.); (P.W.); (M.L.)
| | - Evgenia Gerasimovskaya
- Department of Medicine Cardiovascular and Pulmonary Research Laboratory, University of Colorado Denver, Aurora, CO 80045, USA; (D.S.); (V.K.); (T.S.); (E.C.D.); (K.R.S.)
- Department of Pediatrics, Division of Critical Care Medicine, University of Colorado Denver, Aurora, CO 80045, USA; (H.N.); (P.W.); (M.L.)
- Correspondence: ; Tel.: +1-303-724-5614
| |
Collapse
|
10
|
Zhu J, Li B, Ji Y, Zhu L, Zhu Y, Zhao H. β‑elemene inhibits the generation of peritoneum effusion in pancreatic cancer via suppression of the HIF1A‑VEGFA pathway based on network pharmacology. Oncol Rep 2019; 42:2561-2571. [PMID: 31638231 PMCID: PMC6826333 DOI: 10.3892/or.2019.7360] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 09/13/2019] [Indexed: 12/24/2022] Open
Abstract
Pancreatic cancer remains one of the most lethal types of cancer. Late-stage pancreatic cancer patients usually suffer peritoneum effusion, which severely compromises quality of life. Great efforts have been made concerning the treatment of peritoneum effusion, including treatment with β-elemene. Although peritoneal perfusion of β-elemene attenuates the progression of malignant effusion without severe adverse effects in the clinic, the underlying molecular mechanism underlying the activity of β-elemene against peritoneum effusion remains unclear. In the present study, a network pharmacology approach was undertaken to explore the mechanism of β-elemene against peritoneum effusion. Particularly, the networks of β-elemene and pancreatic cancer target genes were constructed based on the BATMAN-TCM and DigSee databases, respectively. Thirty-three genes, including hypoxia inducible factor 1 subunit α (HIF1A), were discovered in both networks. A potential interaction of β-elemene with HIF1A was revealed by molecular docking simulation and co-expression analysis of pancreatic cancer datasets from The Cancer Genome Atlas (TCGA) database. Additionally, experimental validation by MTT assay demonstrated that β-elemene suppressed proliferation of PANC-1 and BxPC3 cells and cells from peritoneum effusion in patients with pancreatic cancer. Furthermore, the protein expression levels of HIF1A and vascular endothelial growth factor A (VEGFA), as detected by western blotting, were reduced by β-elemene. Overall, this study proposes a potential molecular mechanism illustrating that β-elemene can block the HIF1A/VEGFA pathway, thereby inhibiting the generation of peritoneum effusion in pancreatic cancer based on network pharmacology analysis, and further highlights the importance of targeting the HIF1A/VEGF pathway as a therapeutic approach to treat peritoneum effusion in patients with pancreatic cancer.
Collapse
Affiliation(s)
- Junqiu Zhu
- Department of Oncology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, P.R. China
| | - Bo Li
- Department of Gastroenterology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, P.R. China
| | - Yongsuo Ji
- Department of Oncology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, P.R. China
| | - Linglin Zhu
- Department of Oncology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, P.R. China
| | - Yanfei Zhu
- Department of Oncology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, P.R. China
| | - Hong Zhao
- Department of Oncology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, P.R. China
| |
Collapse
|
11
|
Liu J, Wada Y, Katsura M, Tozawa H, Erwin N, Kapron CM, Bao G, Liu J. Rho-Associated Coiled-Coil Kinase (ROCK) in Molecular Regulation of Angiogenesis. Am J Cancer Res 2018; 8:6053-6069. [PMID: 30613282 PMCID: PMC6299434 DOI: 10.7150/thno.30305] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 10/16/2018] [Indexed: 02/06/2023] Open
Abstract
Identified as a major downstream effector of the small GTPase RhoA, Rho-associated coiled-coil kinase (ROCK) is a versatile regulator of multiple cellular processes. Angiogenesis, the process of generating new capillaries from the pre-existing ones, is required for the development of various diseases such as cancer, diabetes and rheumatoid arthritis. Recently, ROCK has attracted attention for its crucial role in angiogenesis, making it a promising target for new therapeutic approaches. In this review, we summarize recent advances in understanding the role of ROCK signaling in regulating the permeability, migration, proliferation and tubulogenesis of endothelial cells (ECs), as well as its functions in non-ECs which constitute the pro-angiogenic microenvironment. The therapeutic potential of ROCK inhibitors in angiogenesis-related diseases is also discussed.
Collapse
|
12
|
The Role of Inflammation and Inflammatory Mediators in the Development, Progression, Metastasis, and Chemoresistance of Epithelial Ovarian Cancer. Cancers (Basel) 2018; 10:cancers10080251. [PMID: 30061485 PMCID: PMC6116184 DOI: 10.3390/cancers10080251] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/20/2018] [Accepted: 07/24/2018] [Indexed: 12/12/2022] Open
Abstract
Inflammation plays a role in the initiation and development of many types of cancers, including epithelial ovarian cancer (EOC) and high grade serous ovarian cancer (HGSC), a type of EOC. There are connections between EOC and both peritoneal and ovulation-induced inflammation. Additionally, EOCs have an inflammatory component that contributes to their progression. At sites of inflammation, epithelial cells are exposed to increased levels of inflammatory mediators such as reactive oxygen species, cytokines, prostaglandins, and growth factors that contribute to increased cell division, and genetic and epigenetic changes. These exposure-induced changes promote excessive cell proliferation, increased survival, malignant transformation, and cancer development. Furthermore, the pro-inflammatory tumor microenvironment environment (TME) contributes to EOC metastasis and chemoresistance. In this review we will discuss the roles inflammation and inflammatory mediators play in the development, progression, metastasis, and chemoresistance of EOC.
Collapse
|
13
|
De Francesco EM, Sotgia F, Clarke RB, Lisanti MP, Maggiolini M. G Protein-Coupled Receptors at the Crossroad between Physiologic and Pathologic Angiogenesis: Old Paradigms and Emerging Concepts. Int J Mol Sci 2017; 18:ijms18122713. [PMID: 29240722 PMCID: PMC5751314 DOI: 10.3390/ijms18122713] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 12/11/2017] [Accepted: 12/11/2017] [Indexed: 12/14/2022] Open
Abstract
G protein-coupled receptors (GPCRs) have been implicated in transmitting signals across the extra- and intra-cellular compartments, thus allowing environmental stimuli to elicit critical biological responses. As GPCRs can be activated by an extensive range of factors including hormones, neurotransmitters, phospholipids and other stimuli, their involvement in a plethora of physiological functions is not surprising. Aberrant GPCR signaling has been regarded as a major contributor to diverse pathologic conditions, such as inflammatory, cardiovascular and neoplastic diseases. In this regard, solid tumors have been demonstrated to activate an angiogenic program that relies on GPCR action to support cancer growth and metastatic dissemination. Therefore, the manipulation of aberrant GPCR signaling could represent a promising target in anticancer therapy. Here, we highlight the GPCR-mediated angiogenic function focusing on the molecular mechanisms and transduction effectors driving the patho-physiological vasculogenesis. Specifically, we describe evidence for the role of heptahelic receptors and associated G proteins in promoting angiogenic responses in pathologic conditions, especially tumor angiogenesis and progression. Likewise, we discuss opportunities to manipulate aberrant GPCR-mediated angiogenic signaling for therapeutic benefit using innovative GPCR-targeted and patient-tailored pharmacological strategies.
Collapse
Affiliation(s)
- Ernestina M De Francesco
- Department of Pharmacy, Health and Nutrition Sciences, University of Calabria via Savinio, 87036 Rende, Italy.
- Breast Cancer Now Research Unit, Division of Cancer Sciences, Manchester Cancer Research Centre, University of Manchester, Wilmslow Road, Manchester M20 4GJ, UK.
| | - Federica Sotgia
- Translational Medicine, School of Environment and Life Sciences, Biomedical Research Centre, University of Salford, Greater Manchester M5 4WT, UK.
| | - Robert B Clarke
- Breast Cancer Now Research Unit, Division of Cancer Sciences, Manchester Cancer Research Centre, University of Manchester, Wilmslow Road, Manchester M20 4GJ, UK.
| | - Michael P Lisanti
- Translational Medicine, School of Environment and Life Sciences, Biomedical Research Centre, University of Salford, Greater Manchester M5 4WT, UK.
| | - Marcello Maggiolini
- Department of Pharmacy, Health and Nutrition Sciences, University of Calabria via Savinio, 87036 Rende, Italy.
| |
Collapse
|
14
|
Ritorto MS, Rhode H, Vogel A, Borlak J. Regulation of glycosylphosphatidylinositol-anchored proteins and GPI-phospholipase D in a c-Myc transgenic mouse model of hepatocellular carcinoma and human HCC. Biol Chem 2017; 397:1147-1162. [PMID: 27232633 DOI: 10.1515/hsz-2016-0133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 05/24/2016] [Indexed: 01/13/2023]
Abstract
Recent research implicated glycosylphosphatidylinositol-anchored proteins (GPI-AP) and GPI-specific phospholipase D (GPI-PLD) in the pathogenesis of fatty liver disease and hepatocellular carcinoma (HCC). Given that c-Myc is frequently amplified in HCC, we investigated their regulation in a c-Myc transgenic disease model of liver cancer and HCC patient samples. Whole genome scans defined 54 significantly regulated genes coding for GPI-AP of which 29 and 14 were repressed in expression in transgenic tumors and steatotic human hepatocyte cultures, respectively, to influence lipid-mediated signal transduction, extracellular matrix and immunity pathways. Analysis of gene specific promoter revealed >95% to carry c-Myc binding sites thus establishing a link between c-Myc activity and transcriptional response. Alike, serum GPI-PLD activity was increased 4-fold in transgenic mice; however its tissue activity was reduced by 70%. The associated repression of the serine/threonine phosphatase 2A (PP2A), i.e. a key player of c-Myc proteolysis, indicates co-ordinate responses aimed at impairing tissue GPI-PLD anti-proliferative activities. Translational research identified >4-fold increased GPI-PLD serum protein expression though enzyme activities were repressed by 60% in NASH and HCC patients. Taken collectively, c-Myc influences GPI-AP signaling transcriptionally and posttranslational and represses GPI-AP anti-proliferative signaling in tumors. The findings broaden the perspective of molecular targeted therapies and disease monitoring.
Collapse
|
15
|
Worzfeld T, Pogge von Strandmann E, Huber M, Adhikary T, Wagner U, Reinartz S, Müller R. The Unique Molecular and Cellular Microenvironment of Ovarian Cancer. Front Oncol 2017; 7:24. [PMID: 28275576 PMCID: PMC5319992 DOI: 10.3389/fonc.2017.00024] [Citation(s) in RCA: 174] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 02/07/2017] [Indexed: 12/13/2022] Open
Abstract
The reciprocal interplay of cancer cells and host cells is an indispensable prerequisite for tumor growth and progression. Cells of both the innate and adaptive immune system, in particular tumor-associated macrophages (TAMs) and T cells, as well as cancer-associated fibroblasts enter into a malicious liaison with tumor cells to create a tumor-promoting and immunosuppressive tumor microenvironment (TME). Ovarian cancer, the most lethal of all gynecological malignancies, is characterized by a unique TME that enables specific and efficient metastatic routes, impairs immune surveillance, and mediates therapy resistance. A characteristic feature of the ovarian cancer TME is the role of resident host cells, in particular activated mesothelial cells, which line the peritoneal cavity in huge numbers, as well as adipocytes of the omentum, the preferred site of metastatic lesions. Another crucial factor is the peritoneal fluid, which enables the transcoelomic spread of tumor cells to other pelvic and peritoneal organs, and occurs at more advanced stages as a malignancy-associated effusion. This ascites is rich in tumor-promoting soluble factors, extracellular vesicles and detached cancer cells as well as large numbers of T cells, TAMs, and other host cells, which cooperate with resident host cells to support tumor progression and immune evasion. In this review, we summarize and discuss our current knowledge of the cellular and molecular interactions that govern this interplay with a focus on signaling networks formed by cytokines, lipids, and extracellular vesicles; the pathophysiologial roles of TAMs and T cells; the mechanism of transcoelomic metastasis; and the cell type selective processing of signals from the TME.
Collapse
Affiliation(s)
- Thomas Worzfeld
- Institute of Pharmacology, Biochemical-Pharmacological Center (BPC), Philipps University, Marburg, Germany; Department of Pharmacology, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Elke Pogge von Strandmann
- Experimental Tumor Research, Clinic for Hematology, Oncology and Immunology, Center for Tumor Biology and Immunology, Philipps University , Marburg , Germany
| | - Magdalena Huber
- Institute of Medical Microbiology and Hygiene, Biomedical Research Center, Philipps University , Marburg , Germany
| | - Till Adhikary
- Institute of Molecular Biology and Tumor Research, Center for Tumor Biology and Immunology, Philipps University , Marburg , Germany
| | - Uwe Wagner
- Clinic for Gynecology, Gynecological Oncology and Gynecological Endocrinology, University Hospital of Giessen and Marburg (UKGM) , Marburg , Germany
| | - Silke Reinartz
- Clinic for Gynecology, Gynecological Oncology and Gynecological Endocrinology, Center for Tumor Biology and Immunology (ZTI), Philipps University , Marburg , Germany
| | - Rolf Müller
- Institute of Molecular Biology and Tumor Research, Center for Tumor Biology and Immunology, Philipps University , Marburg , Germany
| |
Collapse
|
16
|
Xu JX, Xiong W, Zeng Z, Tang Y, Wang YL, Xiao M, Li M, Li QS, Song GL, Kuang J. Effect of ART1 on the proliferation and migration of mouse colon carcinoma CT26 cells in vivo. Mol Med Rep 2017; 15:1222-1228. [PMID: 28138708 PMCID: PMC5367323 DOI: 10.3892/mmr.2017.6152] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 11/17/2016] [Indexed: 01/11/2023] Open
Abstract
Arginine-specific mono-ADP-ribosyltransferase 1 (ART1) is an important enzyme that catalyzes arginine-specific mono-ADP-ribosylation. There is evidence that arginine-specific mono-ADP-ribosylation may affect the proliferation of smooth muscle cells via the Rho-dependent signaling pathway. Previous studies have demonstrated that ART1 may have a role in the proliferation, invasion and apoptosis of colon carcinoma in vitro. However, the effect of ART1 on the proliferation and invasion of colon carcinoma in vivo has yet to be elucidated. In the present study, mouse colon carcinoma CT26 cells were infected with a lentivirus to produce ART1 gene silencing or overexpression, and were then subcutaneously transplanted. To observe the effect of ART1 on tumor growth or liver metastasis in vivo, a spleen transplant tumor model of CT26 cells in BALB/c mice was successfully constructed. Expression levels of focal adhesion kinase (FAK), Ras homolog gene family member A (RhoA) and the downstream factors, c-myc, c-fos and cyclooxygenase-2 (COX-2) proteins, were measured in vivo. The results demonstrated that ART1 gene silencing inhibited the growth of the spleen transplanted tumor and its ability to spread to the liver via metastasis. There was also an accompanying increase in expression of FAK, RhoA, c-myc, c-fos and COX-2, whereas CT26 cells with ART1 overexpression demonstrated the opposite effect. These results suggest a potential role for ART1 in the proliferation and invasion of CT26 cells and a possible mechanism in vivo.
Collapse
Affiliation(s)
- Jian-Xia Xu
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Wei Xiong
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Zhen Zeng
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Yi Tang
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Ya-Lan Wang
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Ming Xiao
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Ming Li
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Qing Shu Li
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Guang-Lin Song
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Jing Kuang
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing 400016, P.R. China
| |
Collapse
|
17
|
Touat-Hamici Z, Weidmann H, Blum Y, Proust C, Durand H, Iannacci F, Codoni V, Gaignard P, Thérond P, Civelek M, Karabina SA, Lusis AJ, Cambien F, Ninio E. Role of lipid phosphate phosphatase 3 in human aortic endothelial cell function. Cardiovasc Res 2016; 112:702-713. [PMID: 27694435 DOI: 10.1093/cvr/cvw217] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 09/08/2016] [Accepted: 09/21/2016] [Indexed: 12/11/2022] Open
Abstract
AIMS Lipid phosphate phosphatase 3; type 2 phosphatidic acid phosphatase β (LPP3; PPAP2B) is a transmembrane protein dephosphorylating and thereby terminating signalling of lipid substrates including lysophosphatidic acid (LPA) and sphingosine-1-phosphate (S1P). Human LPP3 possesses a cell adhesion motif that allows interaction with integrins. A polymorphism (rs17114036) in PPAP2B is associated with coronary artery disease, which prompted us to investigate the possible role of LPP3 in human endothelial dysfunction, a condition promoting atherosclerosis. METHODS AND RESULTS To study the role of LPP3 in endothelial cells we used human primary aortic endothelial cells (HAECs) in which LPP3 was silenced or overexpressed using either wild type or mutated cDNA constructs. LPP3 silencing in HAECs enhanced secretion of inflammatory cytokines, leucocyte adhesion, cell survival, and migration and impaired angiogenesis, whereas wild-type LPP3 overexpression reversed these effects and induced apoptosis. We also demonstrated that LPP3 expression was negatively correlated with vascular endothelial growth factor expression. Mutations in either the catalytic or the arginine-glycine-aspartate (RGD) domains impaired endothelial cell function and pharmacological inhibition of S1P or LPA restored it. LPA was not secreted in HAECs under silencing or overexpressing LPP3. However, the intra- and extra-cellular levels of S1P tended to be correlated with LPP3 expression, indicating that S1P is probably degraded by LPP3. CONCLUSIONS We demonstrated that LPP3 is a negative regulator of inflammatory cytokines, leucocyte adhesion, cell survival, and migration in HAECs, suggesting a protective role of LPP3 against endothelial dysfunction in humans. Both the catalytic and the RGD functional domains were involved and S1P, but not LPA, might be the endogenous substrate of LPP3.
Collapse
Affiliation(s)
- Zahia Touat-Hamici
- Sorbonne Universités, UPMC, INSERM UMR_S 1166, ICAN, Genomics and Pathophysiology of Cardiovascular Diseases Team, 91 Bd de l'Hôpital, 75013 Paris, France
| | - Henri Weidmann
- Sorbonne Universités, UPMC, INSERM UMR_S 1166, ICAN, Genomics and Pathophysiology of Cardiovascular Diseases Team, 91 Bd de l'Hôpital, 75013 Paris, France
| | - Yuna Blum
- Department of Medicine/Division of Cardiology, University of California, Los Angeles, David Geffen School of Medicine, A2-237 Center for the Health Sciences, 650 Charles E. Young Drive South, Los Angeles, CA 90095-1679, USA
| | - Carole Proust
- Sorbonne Universités, UPMC, INSERM UMR_S 1166, ICAN, Genomics and Pathophysiology of Cardiovascular Diseases Team, 91 Bd de l'Hôpital, 75013 Paris, France
| | - Hervé Durand
- Sorbonne Universités, UPMC, INSERM UMR_S 1166, ICAN, Genomics and Pathophysiology of Cardiovascular Diseases Team, 91 Bd de l'Hôpital, 75013 Paris, France
| | - Francesca Iannacci
- Sorbonne Universités, UPMC, INSERM UMR_S 1166, ICAN, Genomics and Pathophysiology of Cardiovascular Diseases Team, 91 Bd de l'Hôpital, 75013 Paris, France
| | - Veronica Codoni
- Sorbonne Universités, UPMC, INSERM UMR_S 1166, ICAN, Genomics and Pathophysiology of Cardiovascular Diseases Team, 91 Bd de l'Hôpital, 75013 Paris, France
| | - Pauline Gaignard
- APHP, Hôpital de Bicêtre, Service de Biochimie, 78 rue du Général Leclerc, 94275 Le Kremlin Bicêtre, France.,Université Paris Sud, UR Lip(Sys), UFR de Pharmacie, 5 rue Jean-Baptiste Clément, Châtenay-Malabry 92296, France
| | - Patrice Thérond
- APHP, Hôpital de Bicêtre, Service de Biochimie, 78 rue du Général Leclerc, 94275 Le Kremlin Bicêtre, France.,Université Paris Sud, UR Lip(Sys), UFR de Pharmacie, 5 rue Jean-Baptiste Clément, Châtenay-Malabry 92296, France
| | - Mete Civelek
- Department of Medicine/Division of Cardiology, University of California, Los Angeles, David Geffen School of Medicine, A2-237 Center for the Health Sciences, 650 Charles E. Young Drive South, Los Angeles, CA 90095-1679, USA
| | - Sonia A Karabina
- Sorbonne Universités, UPMC, INSERM UMR_S 933, Hôpital Armand-Trousseau, 4 rue de la Chine, 75020 Paris, France
| | - Aldons J Lusis
- Department of Medicine/Division of Cardiology, University of California, Los Angeles, David Geffen School of Medicine, A2-237 Center for the Health Sciences, 650 Charles E. Young Drive South, Los Angeles, CA 90095-1679, USA
| | - François Cambien
- Sorbonne Universités, UPMC, INSERM UMR_S 1166, ICAN, Genomics and Pathophysiology of Cardiovascular Diseases Team, 91 Bd de l'Hôpital, 75013 Paris, France
| | - Ewa Ninio
- Sorbonne Universités, UPMC, INSERM UMR_S 1166, ICAN, Genomics and Pathophysiology of Cardiovascular Diseases Team, 91 Bd de l'Hôpital, 75013 Paris, France
| |
Collapse
|
18
|
Brook L, Whitfield GK, Hsieh D, Bither RD, Hsieh JC. The Mammalian Hairless Protein as a DNA Binding Phosphoprotein. J Cell Biochem 2016; 118:341-350. [PMID: 27355563 DOI: 10.1002/jcb.25641] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 06/28/2016] [Indexed: 11/08/2022]
Abstract
The mammalian hairless (Hr) protein plays critical roles in skin and brain tissues, but how it interacts with DNA and partner protein is only now being defined. Our initial tests of four consensus response elements, revealed that rat Hr can specifically bind to a consensus p53 response element (p53RE), 5'-AGACATGCCTAGACATGCCT-3', but not to response elements for NF-κB, TCF4 or Sp1. We then employed ChIP assays which verified that human HR binds to a p53RE of the GADD45A gene in both HEK293 (embryonic kidney) and U87 (glioblastoma) cells. Further, HR was shown to interact directly with the p53 protein in a co-immunoprecipitation assay. Cotransfections with p53RE reporter gene constructs revealed that rat Hr can boost p53-mediated transactivation of a reporter gene linked to the GADD45A p53RE, but blunts p53-mediated transactivation when the reporter gene is linked to a p21 promoter fragment containing a p53RE, with implications for the regulation of these two cell cycle control genes. Finally, our investigations of HR phosphorylation revealed that rat Hr is a substrate for PKC, but not PKA, and that human HR is phosphorylated in intact U87 cells at Ser-416, located in a highly conserved region which partially fulfills the criteria of a PKC site. We propose that mammalian Hr is a phosphoprotein which can exert cross-talk with the p53 pathway with important implications for the regulation of cell proliferation and differentiation in tissues such as skin and brain where Hr is highly expressed. J. Cell. Biochem. 118: 341-350, 2017. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Lemlem Brook
- Department of Basic Medical Sciences, College of Medicine-Phoenix, University of Arizona, Phoenix, Arizona
| | - G Kerr Whitfield
- Department of Basic Medical Sciences, College of Medicine-Phoenix, University of Arizona, Phoenix, Arizona
| | - David Hsieh
- Mount Auburn Hospital, 330 Mt Auburn St, Cambridge, Massachusetts
| | - Ryan D Bither
- Department of Basic Medical Sciences, College of Medicine-Phoenix, University of Arizona, Phoenix, Arizona
| | - Jui-Cheng Hsieh
- Department of Basic Medical Sciences, College of Medicine-Phoenix, University of Arizona, Phoenix, Arizona
| |
Collapse
|
19
|
Mukherjee A, Ma Y, Yuan F, Gong Y, Fang Z, Mohamed EM, Berrios E, Shao H, Fang X. Lysophosphatidic Acid Up-Regulates Hexokinase II and Glycolysis to Promote Proliferation of Ovarian Cancer Cells. Neoplasia 2016; 17:723-734. [PMID: 26476080 PMCID: PMC4611075 DOI: 10.1016/j.neo.2015.09.003] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 09/04/2015] [Accepted: 09/15/2015] [Indexed: 02/04/2023] Open
Abstract
Lysophosphatidic acid (LPA), a blood-borne lipid mediator, is present in elevated concentrations in ascites of ovarian cancer patients and other malignant effusions. LPA is a potent mitogen in cancer cells. The mechanism linking LPA signal to cancer cell proliferation is not well understood. Little is known about whether LPA affects glucose metabolism to accommodate rapid proliferation of cancer cells. Here we describe that in ovarian cancer cells, LPA enhances glycolytic rate and lactate efflux. A real time PCR-based miniarray showed that hexokinase II (HK2) was the most dramatically induced glycolytic gene to promote glycolysis in LPA-treated cells. Analysis of the human HK2 gene promoter identified the sterol regulatory element-binding protein as the primary mediator of LPA-induced HK2 transcription. The effects of LPA on HK2 and glycolysis rely on LPA2, an LPA receptor subtype overexpressed in ovarian cancer and many other malignancies. We further examined the general role of growth factor-induced glycolysis in cell proliferation. Like LPA, epidermal growth factor (EGF) elicited robust glycolytic and proliferative responses in ovarian cancer cells. Insulin-like growth factor 1 (IGF-1) and insulin, however, potently stimulated cell proliferation but only modestly induced glycolysis. Consistent with their differential effects on glycolysis, LPA and EGF-dependent cell proliferation was highly sensitive to glycolytic inhibition while the growth-promoting effect of IGF-1 or insulin was more resistant. These results indicate that LPA- and EGF-induced cell proliferation selectively involves up-regulation of HK2 and glycolytic metabolism. The work is the first to implicate LPA signaling in promotion of glucose metabolism in cancer cells.
Collapse
Affiliation(s)
- Abir Mukherjee
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Yibao Ma
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Fang Yuan
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Yongling Gong
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Zhenyu Fang
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Esraa M Mohamed
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Erika Berrios
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Huanjie Shao
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Xianjun Fang
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298.
| |
Collapse
|
20
|
Liu L, Tong Q, Liu S, Cui J, Zhang Q, Sun W, Yang S. ZEB1 Upregulates VEGF Expression and Stimulates Angiogenesis in Breast Cancer. PLoS One 2016; 11:e0148774. [PMID: 26882471 PMCID: PMC4755590 DOI: 10.1371/journal.pone.0148774] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Accepted: 01/22/2016] [Indexed: 01/12/2023] Open
Abstract
Although zinc finger E-box binding homeobox 1 (ZEB1) has been identified as a key factor in the regulation of breast cancer differentiation and metastasis, its potential role in modulating tumor angiogenesis has not been fully examined. Here, we present the novel finding that conditioned medium derived from ZEB1-expressing MDA-MB-231 cells significantly increased the capillary tube formation of human umbilical vein endothelial cells (HUVECs), whereas ZEB1 knockdown by RNA interference had the opposite effect. ZEB1 caused marked upregulation of the expression of vascular endothelial growth factor A (VEGFA) at both mRNA and protein levels. Pre-incubation of HUVECs with anti-VEGFA neutralized antibody attenuated ZEB1-mediated tube formation of HUVECs. In breast cancer tissues, expression of ZEB1 was positively correlated with those of VEGFA and CD31. At the molecular level, ZEB1 activated VEGFA transcription by increasing SP1 recruitment to its promoter, which was mediated via the activation of PI3K and p38 pathways. Using a nude mouse xenograft model, we demonstrated that elevated expression of ZEB1 promotes in vivo tumorigenesis and angiogenesis in breast cancer. Collectively, we found that ZEB1-expressing breast cancer cells increase VEGFA production and thus stimulate tumor growth and angiogenesis via a paracrine mechanism.
Collapse
Affiliation(s)
- Lingjia Liu
- Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Medical College of Nankai University, Tianjin 300071, China
| | - Qi Tong
- Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Medical College of Nankai University, Tianjin 300071, China
| | - Shuo Liu
- Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Medical College of Nankai University, Tianjin 300071, China
| | - Jianlin Cui
- Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Medical College of Nankai University, Tianjin 300071, China
| | - Quansheng Zhang
- Tianjin Key Laboratory of Organ Transplantation, Tianjin First Center Hospital, Tianjin 300192, China
| | - Wei Sun
- Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Medical College of Nankai University, Tianjin 300071, China
- * E-mail: (SY); (WS)
| | - Shuang Yang
- Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Medical College of Nankai University, Tianjin 300071, China
- * E-mail: (SY); (WS)
| |
Collapse
|
21
|
Jesionowska A, Cecerska-Heryc E, Matoszka N, Dolegowska B. Lysophosphatidic acid signaling in ovarian cancer. J Recept Signal Transduct Res 2015; 35:578-84. [PMID: 26393967 DOI: 10.3109/10799893.2015.1026444] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Lysophosphatidic acid (LPA) is a bioactive phospholipid that is involved in signal transduction between cells. Plasma and ascites levels of LPA are increased in ovarian cancer patients even in the early stages and thus LPA is considered as a potential diagnostic marker for this disease. This review presents the current knowledge regarding LPA signaling in epithelial ovarian cancer. LPA stimulates proliferation, migration and invasion of ovarian cancer cells through regulation of vascular endothelial growth factor, matrix metalloproteinases, urokinase plasminogen activator, interleukin-6, interleukin-8, CXC motif chemokine ligand 12/CXC receptor 4, COX2, cyclin D1, Hippo-Yap and growth-regulated oncogene α concentrations. In this article, all of these targets and signal pathways involved in LPA influence are described.
Collapse
Affiliation(s)
| | - Elzbieta Cecerska-Heryc
- b Department of Laboratory Diagnostics and Molecular Medicine , Pomeranian Medical University , Szczecin , Poland
| | - Natalia Matoszka
- b Department of Laboratory Diagnostics and Molecular Medicine , Pomeranian Medical University , Szczecin , Poland
| | - Barbara Dolegowska
- b Department of Laboratory Diagnostics and Molecular Medicine , Pomeranian Medical University , Szczecin , Poland
| |
Collapse
|
22
|
Lee KB, Ye S, Park MH, Park BH, Lee JS, Kim SM. p63-Mediated activation of the β-catenin/c-Myc signaling pathway stimulates esophageal squamous carcinoma cell invasion and metastasis. Cancer Lett 2014; 353:124-32. [PMID: 25045846 DOI: 10.1016/j.canlet.2014.07.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 07/10/2014] [Accepted: 07/10/2014] [Indexed: 11/24/2022]
Abstract
The development of esophageal squamous carcinomas (ESC) results from numerous genetic alterations. Our previous study demonstrated that p63 is highly expressed in human ESC cells and stimulates their growth; however, the mechanism by which p63 regulates ESC cell adhesion and invasion remains unclear. In the present study, we further elucidated the underlying molecular mechanisms by which p63 regulates metastasis in ESC cells. Knockdown of p63 significantly diminished the invasion of ESC cell lines TE-8 and TE-12, whereas overexpression of p63 significantly increased the migration rates of BE3 and OE33 cells. The mRNA and protein levels of vimentin, twist, SUSD2, and uPA were significantly decreased in p63-knockdown ESC cells, while overexpression of p63 induced an increase in vimentin, SUSD2, and uPA. In addition, knockdown of p63 in ESC cells significantly reduced levels of β-catenin and c-Myc, while overexpression of p63 increased β-catenin, but reduced p-β-catenin level. Therefore, p63 regulates the migration and invasion of ESC cells through activation of the β-catenin/c-Myc pathway. Our results suggest that targeting p63 may constitute a potential therapeutic strategy for ESC.
Collapse
Affiliation(s)
- Kwang Bok Lee
- Department of Orthopedic Surgery, Chonbuk National University Medical School and Hospital, Jeonju 561-181, Republic of Korea
| | - Shuai Ye
- Department of Orthopedic Surgery, Chonbuk National University Medical School and Hospital, Jeonju 561-181, Republic of Korea
| | - Man Hee Park
- Catholic University of Pusan, Busan 609-757, Republic of Korea
| | - Byung Hyun Park
- Department of Biochemistry, Chonbuk National University Medical School, Jeonju 561-181, Republic of Korea
| | - Ju-Seog Lee
- Department of Systems Biology, University of Texas M.D. Anderson Cancer Center, Houston, TX 77054, USA
| | - Soo Mi Kim
- Department of Physiology, Institute for Medical Sciences, Chonbuk National University Medical School, Jeonju 561-181, Republic of Korea.
| |
Collapse
|
23
|
Bai CQ, Yao YW, Liu CH, Zhang H, Xu XB, Zeng JL, Liang WJ, Yang W, Song Y. Diagnostic and prognostic significance of lysophosphatidic acid in malignant pleural effusions. J Thorac Dis 2014; 6:483-90. [PMID: 24822107 DOI: 10.3978/j.issn.2072-1439.2014.02.14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Accepted: 02/26/2014] [Indexed: 01/08/2023]
Abstract
BACKGROUND Lysophosphatidic acid (LPA) is an important extracellular signal transmitter and intracellular second messenger in body fluids. It can be detected in the ascitic fluid of patients with ovarian cancer. Increasing evidence shows that LPA can stimulate cancer cell proliferation and promote tumor invasion and metastasis. Our study aimed to evaluate the diagnostic value of LPA in differentiating between malignant pleural effusions (MPEs) and benign pleural effusions (BPEs) and to evaluate the association between the level of LPA in MPE and the prognosis of lung cancer patients. PATIENTS AND METHODS The level of LPA in the pleural effusions (PEs) of 123 patients (94 MPE, 29 BPE) with lung cancer was evaluated using an enzyme-linked immunosorbent assay. The performance of LPA was analyzed by standard Receiver operator characteristic curve (ROC) analysis methods, using the area under the curve (AUC) as a measure of accuracy. Overall survival (OS) curves and progression-free survival (PFS) curves were based on the Kaplan-Meier method, and the survival differences between subgroups were analyzed using the log-rank or Breslow test (SPSS software). A multivariate Cox proportional hazards model was used to assess whether LPA independently predicted lung cancer survival. RESULTS The levels of LPA differed significantly between MPE (22.08±8.72 µg/L) and BPE (14.61±5.12 µg/L) (P<0.05). Using a cutoff point of 18.93 µg/L, LPA had a sensitivity of 60% and a specificity of 83% to distinguish MPEs from BPEs with an AUC of 0.769±0.045 (SE) (P=0.000) (95% CI, 0.68-0.857). In the three pathological types of lung cancer patients with MPE, there were no significant associations between LPA levels and the length of PFS and OS (P=0.58 and 0.186, respectively). Interestingly, in the patients with MPE caused by lung adenocarcinoma there were significant associations between the LPA levels and the PFS and OS (P=0.018 and 0.026, respectively). Multivariate analysis showed that the LPA level was an independent prognostic factor for PFS in lung adenocarcinoma. CONCLUSIONS Our results indicate that LPA can be used as a new biomarker for the diagnosis of MPE caused by lung cancer and that higher levels of LPA are related to shorter PFS in adenocarcinoma of the lung.
Collapse
Affiliation(s)
- Cui-Qing Bai
- 1 Department of Respiratory Medicine, Jinling Hospital, Nanjing clinical school, Southern Medical University (Guangzhou), Nanjing 210001, China ; 2 Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing 210001, China ; 3 Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu 241000, China ; 4 Department of Gastroenterology and Hepatology, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University, Nanjing 210002, China
| | - Yan-Wen Yao
- 1 Department of Respiratory Medicine, Jinling Hospital, Nanjing clinical school, Southern Medical University (Guangzhou), Nanjing 210001, China ; 2 Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing 210001, China ; 3 Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu 241000, China ; 4 Department of Gastroenterology and Hepatology, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University, Nanjing 210002, China
| | - Chun-Hua Liu
- 1 Department of Respiratory Medicine, Jinling Hospital, Nanjing clinical school, Southern Medical University (Guangzhou), Nanjing 210001, China ; 2 Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing 210001, China ; 3 Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu 241000, China ; 4 Department of Gastroenterology and Hepatology, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University, Nanjing 210002, China
| | - He Zhang
- 1 Department of Respiratory Medicine, Jinling Hospital, Nanjing clinical school, Southern Medical University (Guangzhou), Nanjing 210001, China ; 2 Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing 210001, China ; 3 Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu 241000, China ; 4 Department of Gastroenterology and Hepatology, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University, Nanjing 210002, China
| | - Xiao-Bing Xu
- 1 Department of Respiratory Medicine, Jinling Hospital, Nanjing clinical school, Southern Medical University (Guangzhou), Nanjing 210001, China ; 2 Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing 210001, China ; 3 Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu 241000, China ; 4 Department of Gastroenterology and Hepatology, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University, Nanjing 210002, China
| | - Jun-Li Zeng
- 1 Department of Respiratory Medicine, Jinling Hospital, Nanjing clinical school, Southern Medical University (Guangzhou), Nanjing 210001, China ; 2 Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing 210001, China ; 3 Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu 241000, China ; 4 Department of Gastroenterology and Hepatology, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University, Nanjing 210002, China
| | - Wen-Jun Liang
- 1 Department of Respiratory Medicine, Jinling Hospital, Nanjing clinical school, Southern Medical University (Guangzhou), Nanjing 210001, China ; 2 Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing 210001, China ; 3 Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu 241000, China ; 4 Department of Gastroenterology and Hepatology, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University, Nanjing 210002, China
| | - Wen Yang
- 1 Department of Respiratory Medicine, Jinling Hospital, Nanjing clinical school, Southern Medical University (Guangzhou), Nanjing 210001, China ; 2 Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing 210001, China ; 3 Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu 241000, China ; 4 Department of Gastroenterology and Hepatology, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University, Nanjing 210002, China
| | - Yong Song
- 1 Department of Respiratory Medicine, Jinling Hospital, Nanjing clinical school, Southern Medical University (Guangzhou), Nanjing 210001, China ; 2 Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing 210001, China ; 3 Department of Respiratory Medicine, Yijishan Hospital, Wannan Medical College, Wuhu 241000, China ; 4 Department of Gastroenterology and Hepatology, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University, Nanjing 210002, China
| |
Collapse
|
24
|
Zhang D, Wang G, Wang Y. Transcriptional regulation prediction of antiestrogen resistance in breast cancer based on RNA polymerase II binding data. BMC Bioinformatics 2014; 15 Suppl 2:S10. [PMID: 24564526 PMCID: PMC4015922 DOI: 10.1186/1471-2105-15-s2-s10] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Background Although endocrine therapy impedes estrogen-ER signaling pathway and thus reduces breast cancer mortality, patients remain at continued risk of relapse after tamoxifen or other endocrine therapies. Understanding the mechanisms of endocrine resistance, particularly the role of transcriptional regulation is very important and necessary. Methods We propose a two-step workflow based on linear model to investigate the significant differences between MCF7 and OHT cells stimulated by 17β-estradiol (E2) respect to regulatory transcription factors (TFs) and their interactions. We additionally compared predicted regulatory TFs based on RNA polymerase II (PolII) binding quantity data and gene expression data, which were taken from MCF7/MCF7+E2 and OHT/OHT+E2 cell lines following the same analysis workflow. Enrichment analysis concerning diseases and cell functions and regulatory pattern analysis of different motifs of the same TF also were performed. Results The results showed PolII data could provide more information and predict more recognizably important regulatory TFs. Large differences in TF regulatory mode were found between two cell lines. Through verified through GO annotation, enrichment analysis and related literature regarding these TFs, we found some regulatory TFs such as AP-1, C/EBP, FoxA1, GATA1, Oct-1 and NF-κB, maintained OHT cells through molecular interactions or signaling pathways that were different from the surviving MCF7 cells. From TF regulatory interaction network, we identified E2F, E2F-1 and AP-2 as hub-TFs in MCF7 cells; whereas, in addition to E2F and E2F-1, we identified C/EBP and Oct-1 as hub-TFs in OHT cells. Notably, we found the regulatory patterns of different motifs of the same TF were very different from one another sometimes. Conclusions We inferred some regulatory TFs, such as AP-1 and NF-κB, cooperated with ER through both genomic action and non-genomic action. The TFs that were involved in both protein-protein interactions and signaling pathways could be one of the key resistant mechanisms of endocrine therapy and thus also could be new treatment targets for endocrine resistance. Our flexible workflow could be integrated into an existing analytical framework and guide biologists to further determine underlying mechanisms in human diseases.
Collapse
|
25
|
Ray A, Alalem M, Ray BK. Loss of epigenetic Kruppel-like factor 4 histone deacetylase (KLF-4-HDAC)-mediated transcriptional suppression is crucial in increasing vascular endothelial growth factor (VEGF) expression in breast cancer. J Biol Chem 2013; 288:27232-27242. [PMID: 23926105 DOI: 10.1074/jbc.m113.481184] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Vascular endothelial growth factor (VEGF) is recognized as an important angiogenic factor that promotes angiogenesis in a series of pathological conditions, including cancer, inflammation, and ischemic disorders. We have recently shown that the inflammatory transcription factor SAF-1 is, at least in part, responsible for the marked increase of VEGF levels in breast cancer. Here, we show that SAF-1-mediated induction of VEGF is repressed by KLF-4 transcription factor. KLF-4 is abundantly present in normal breast epithelial cells, but its level is considerably reduced in breast cancer cells and clinical cancer tissues. In the human VEGF promoter, SAF-1- and KLF-4-binding elements are overlapping, whereas SAF-1 induces and KLF-4 suppresses VEGF expression. Ectopic overexpression of KLF-4 and RNAi-mediated inhibition of endogenous KLF-4 supported the role of KLF-4 as a transcriptional repressor of VEGF and an inhibitor of angiogenesis in breast cancer cells. We show that KLF-4 recruits histone deacetylases (HDACs) -2 and -3 at the VEGF promoter. Chronological ChIP assays demonstrated the occupancy of KLF-4, HDAC2, and HDAC3 in the VEGF promoter in normal MCF-10A cells but not in MDA-MB-231 cancer cells. Co-transfection of KLF-4 and HDAC expression plasmids in breast cancer cells results in synergistic repression of VEGF expression and inhibition of angiogenic potential of these carcinoma cells. Together these results identify a new mechanism of VEGF up-regulation in cancer that involves concomitant loss of KLF-4-HDAC-mediated transcriptional repression and active recruitment of SAF-1-mediated transcriptional activation.
Collapse
Affiliation(s)
- Alpana Ray
- Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri 65211.
| | - Mohamed Alalem
- Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri 65211
| | - Bimal K Ray
- Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri 65211.
| |
Collapse
|
26
|
Abu El-Asrar AM, Mohammad G, Nawaz MI, Siddiquei MM, Kangave D, Opdenakker G. Expression of lysophosphatidic acid, autotaxin and acylglycerol kinase as biomarkers in diabetic retinopathy. Acta Diabetol 2013; 50:363-71. [PMID: 22864860 DOI: 10.1007/s00592-012-0422-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Accepted: 07/23/2012] [Indexed: 02/01/2023]
Abstract
The proinflammatory lysophosphatidic acid (LPA) is a potent activator of several transcriptional factors and signaling pathways and a potent modulator of genes involved in inflammation, angiogenesis and fibrosis. This study was conducted to measure the levels of LPA and LPA-producing enzymes, autotaxin (ATX) and acylglycerol kinase (AGK) in the vitreous fluid from patients with proliferative diabetic retinopathy (PDR) and to correlate their levels with clinical disease activity and the level of vascular endothelial growth factor (VEGF). In addition, we examined the expression of ATX, AGK and VEGF receptor-2 (VEGFR-2) in the retinas of diabetic rats. Vitreous samples from 42 PDR and 35 nondiabetic patients were studied by enzyme-linked immunosorbent assay. Vitreous samples and retinas of rats were examined by Western blot analysis. VEGF, LPA and AGK levels in vitreous samples from PDR patients were significantly higher than those in control patients without diabetes (p < 0.001 for all comparisons). ATX levels in PDR with active neovascularization and inactive PDR were significantly lower than those in nondiabetic patients (p = 0.045). Mean VEGF and AGK levels in PDR with active neovascularization were significantly higher than those in inactive PDR and nondiabetic patients (p < 0.001 for both comparisons). A significant correlation was observed between levels of VEGF and levels of AGK in PDR patients (r = 0.954; p < 0.001). Western blot analysis revealed a significant increase in the expression of AGK and VEGFR-2 in vitreous samples and the retinas of diabetic rats compared to nondiabetic controls, whereas ATX was significantly downregulated. Our findings suggest that ATX-AGK-LPA signaling axis might be an important player in the development and progression of diabetic retinopathy.
Collapse
Affiliation(s)
- Ahmed M Abu El-Asrar
- Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
| | | | | | | | | | | |
Collapse
|
27
|
Wei H, Wang F, Wang X, Yang J, Li Z, Cong X, Chen X. Lysophosphatidic acid promotes secretion of VEGF by increasing expression of 150-kD Oxygen-regulated protein (ORP150) in mesenchymal stem cells. Biochim Biophys Acta Mol Cell Biol Lipids 2013; 1831:1426-34. [PMID: 23707263 DOI: 10.1016/j.bbalip.2013.05.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 04/18/2013] [Accepted: 05/13/2013] [Indexed: 01/16/2023]
Abstract
We previously reported that transplantation of lysophosphatidic acid (LPA) treated mesenchymal stem cells (MSCs) enhances capillary density in the myocardium and improves myocardial function in the ischemic heart. This effect may be mediated through the release of paracrine factors by MSC and potentially involves pro-angiogenic molecules such as vascular endothelial growth factor (VEGF). In this study, we examined the pharmacological and molecular regulation of VEGF secretion induced by LPA in rat MSCs. We showed that LPA stimulated VEGF secretion in MSCs but not in cardiomyocytes or cardiac fibroblasts. LPA-induced VEGF secretion occurred at the post-transcriptional levels and was mediated through the classical ER/Golgi-dependent protein secretory route. LPA also increased ORP150 protein expression. Inhibition of ORP150 upregulation by siRNA knockdown attenuated LPA-induced VEGF secretion. On the other hand, diazoxide, an activator of KATP channel, markedly inhibited LPA-induced ORP150 expression and VEGF secretion. Meanwhile, ATP concentration dependently increased VEGF secretion. In addition, l-Glutamate and NH4Cl significantly reduced VEGF secretion. Furthermore, inhibition of two major subtypes of LPA receptors by Ki16425 and specific siRNA for LPA receptors prevented LPA-induced VEGF secretion and ORP150 expression. Lastly, inhibition of Gi protein that couples with LPA receptors by PTX and siRNA knockdown had no effect on LPA-induced VEGF secretion. Taken together, our findings demonstrate that LPA promotes VEGF secretion at the post-translation level by up-regulating ORP150 expression. Both LPA1 and LPA3 are involved in the LPA-induced VEGF secretion that is independent of Gi protein coupling but associated with the inactivation of KATP channels and inhibition of Na(+)/K(+)-ATPase activity.
Collapse
Affiliation(s)
- Hua Wei
- Chinese Academy of Medical Sciences, Beijing, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
28
|
Aberrant lipid metabolism: an emerging diagnostic and therapeutic target in ovarian cancer. Int J Mol Sci 2013; 14:7742-56. [PMID: 23574936 PMCID: PMC3645713 DOI: 10.3390/ijms14047742] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 03/06/2013] [Accepted: 03/07/2013] [Indexed: 01/07/2023] Open
Abstract
Ovarian cancer remains the most lethal gynaecological cancer. A better understanding of the molecular pathogenesis of ovarian cancer is of critical importance to develop early detection tests and identify new therapeutic targets that would increase survival. Cancer cells depend on de novo lipid synthesis for the generation of fatty acids to meet the energy requirements for increased tumour growth. There is increasing evidence that lipid metabolism is deregulated in cancers, including ovarian cancer. The increased expression and activity of lipogenic enzymes is largely responsible for increased lipid synthesis, which is regulated by metabolic and oncogenic signalling pathways. This article reviews the latest knowledge on lipid metabolism and the alterations in the expression of lipogenic enzymes and downstream signalling pathways in ovarian cancer. Current developments for exploiting lipids as biomarkers for the detection of early stage ovarian cancer and therapeutic targets are discussed. Current research targeting lipogenic enzymes and lipids to increase the cytotoxicity of chemotherapy drugs is also highlighted.
Collapse
|
29
|
Figueras A, Arbos MA, Quiles MT, Viñals F, Germà JR, Capellà G. The impact of KRAS mutations on VEGF-A production and tumour vascular network. BMC Cancer 2013; 13:125. [PMID: 23506169 PMCID: PMC3610256 DOI: 10.1186/1471-2407-13-125] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 03/08/2013] [Indexed: 11/15/2022] Open
Abstract
Background The malignant potential of tumour cells may be influenced by the molecular nature of KRAS mutations being codon 13 mutations less aggressive than codon 12 ones. Their metabolic profile is also different, with an increased anaerobic glycolytic metabolism in cells harbouring codon 12 KRAS mutations compared with cells containing codon 13 mutations. We hypothesized that this distinct metabolic behaviour could be associated with different HIF-1α expression and a distinct angiogenic profile. Methods Codon13 KRAS mutation (ASP13) or codon12 KRAS mutation (CYS12) NIH3T3 transfectants were analyzed in vitro and in vivo. Expression of HIF-1α, and VEGF-A was studied at RNA and protein levels. Regulation of VEGF-A promoter activity was assessed by means of luciferase assays using different plasmid constructs. Vascular network was assessed in tumors growing after subcutaneous inoculation. Non parametric statistics were used for analysis of results. Results Our results show that in normoxic conditions ASP13 transfectants exhibited less HIF-1α protein levels and activity than CYS12. In contrast, codon 13 transfectants exhibited higher VEGF-A mRNA and protein levels and enhanced VEGF-A promoter activity. These differences were due to a differential activation of Sp1/AP2 transcription elements of the VEGF-A promoter associated with increased ERKs signalling in ASP13 transfectants. Subcutaneous CYS12 tumours expressed less VEGF-A and showed a higher microvessel density (MVD) than ASP13 tumours. In contrast, prominent vessels were only observed in the latter. Conclusion Subtle changes in the molecular nature of KRAS oncogene activating mutations occurring in tumour cells have a major impact on the vascular strategy devised providing with new insights on the role of KRAS mutations on angiogenesis.
Collapse
Affiliation(s)
- Agnès Figueras
- Translational Research Laboratory, Institut Català d'Oncologia-IDIBELL, Gran Via 199-203, 08908 L'Hospitalet del Llobregat, Barcelona, Spain
| | | | | | | | | | | |
Collapse
|
30
|
Ren H, Panchatcharam M, Mueller P, Escalante-Alcalde D, Morris AJ, Smyth SS. Lipid phosphate phosphatase (LPP3) and vascular development. BIOCHIMICA ET BIOPHYSICA ACTA 2013; 1831:126-32. [PMID: 22835522 PMCID: PMC3683602 DOI: 10.1016/j.bbalip.2012.07.012] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 07/15/2012] [Accepted: 07/16/2012] [Indexed: 01/12/2023]
Abstract
Lipid phosphate phosphatases (LPP) are integral membrane proteins with broad substrate specificity that dephosphorylate lipid substrates including phosphatidic acid, lysophosphatidic acid, ceramide 1-phosphate, sphingosine 1-phosphate, and diacylglycerol pyrophosphate. Although the three mammalian enzymes (LPP1-3) demonstrate overlapping catalytic activities and substrate preferences in vitro, the phenotypes of mice with targeted inactivation of the Ppap2 genes encoding the LPP enzymes reveal nonredundant functions. A specific role for LPP3 in vascular development has emerged from studies of mice lacking Ppap2b. A meta-analysis of multiple, large genome-wide association studies identified a single nucleotide polymorphism in PPAP2B as a novel predictor of coronary artery disease. In this review, we will discuss the evidence that links LPP3 to vascular development and disease and evaluate potential molecular mechanisms. This article is part of a Special Issue entitled Advances in Lysophospholipid Research.
Collapse
Affiliation(s)
- H Ren
- The Gill Heart Institute, Division of Cardiovascular Medicine, Lexington, KY 40536-0200, USA
| | | | | | | | | | | |
Collapse
|
31
|
Mo WJ, Li J, Lu HP, Feng ZB. Expression of Sp3 and VEGF in hepatocellular carcinoma and their correlation. Shijie Huaren Xiaohua Zazhi 2012; 20:3101-3106. [DOI: 10.11569/wcjd.v20.i32.3101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the expression of transcription factor Sp3 and vascular endothelial growth factor (VEGF) in hepatocellular carcinoma (HCC) and their correlation.
METHODS: Immunohistochemical method was used to detect the expression of Sp3 and VEGF in 111 cases of HCC and tumor-adjacent liver tissue. The correlations between Sp3 and VEGF expression, and between these two indices and clinicopathologic characteristics of HCC were analyzed.
RESULTS: The positive rate of moderate or strong Sp3 expression in HCC was significantly higher than that in tumor-adjacent liver tissue (82.9% vs 29.7%, P = 0.000). There is a positive correlation between Sp3 and VEGF expression in HCC (r = 0.352, P = 0.000). Both Sp3 and VEGF expression was related with tumor differentiation. In addition, expression of Sp3 was related with tumor size, and expression of VEGF was related with TNM stage. The prognosis of cases with high Sp3 expression was poorer than those with low Sp3 expression (P = 0.041).
CONCLUSION: Sp3 is expected to be an index for diagnosis of HCC. Combined detection of Sp3 and VEGF expression may be used to evaluate the malignant degree of HCC.
Collapse
|
32
|
Ohta T, Takahashi T, Shibuya T, Amita M, Henmi N, Takahashi K, Kurachi H. Inhibition of the Rho/ROCK pathway enhances the efficacy of cisplatin through the blockage of hypoxia-inducible factor-1α in human ovarian cancer cells. Cancer Biol Ther 2012; 13:25-33. [PMID: 22336585 DOI: 10.4161/cbt.13.1.18440] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Rho, a Ras-related small GTPase, and Rho-associated coiled coil-containing protein kinase (Rho kinase, ROCK1 and ROCK2) are key regulators of focal adhesion, actomyosin contraction, and thus cell motility. Rho/ROCK kinases also play roles in proliferation, differentiation, apoptosis and oncogenic transformation. In the present study, we have shown that Rho/ROCK pathway inhibition by fasudil, an orally administered inhibitor of Rho kinases, enhanced cisplatin-induced growth inhibition and apoptosis in human ovarian cancer cell lines. Fasudil inhibited hypoxia inducible factor (HIF)-1α protein expression. Knockdown of RhoA, ROCK1 or ROCK2 also attenuated the expression of HIF-1α. Furthermore, knockdown of HIF-1α using small interfering RNA enhanced cisplatin-induced growth inhibition and apoptosis as did inhibition of the Rho/ROCK pathway by fasudil, the Rho/ROCK inhibitor Y27632, or by Rho/ROCK knockdown. Therefore, the Rho/ROCK pathway may modulate HIF-1α signal transduction and blockade of Rho/ROCK enhances the efficacy of cisplatin by inhibiting HIF-1α in ovarian cancer cells. Our findings suggested that the Rho/ROCK pathway may be a new target for molecular targeting therapies against ovarian cancer.
Collapse
Affiliation(s)
- Tsuyoshi Ohta
- Department of Obstetrics and Gynecology, School of Medicine, Yamagata University, Yamagata, Japan.
| | | | | | | | | | | | | |
Collapse
|
33
|
Clifford RL, John AE, Brightling CE, Knox AJ. Abnormal histone methylation is responsible for increased vascular endothelial growth factor 165a secretion from airway smooth muscle cells in asthma. THE JOURNAL OF IMMUNOLOGY 2012; 189:819-31. [PMID: 22689881 DOI: 10.4049/jimmunol.1103641] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Vascular endothelial growth factor (VEGF), a key angiogenic molecule, is aberrantly expressed in several diseases including asthma where it contributes to bronchial vascular remodeling and chronic inflammation. Asthmatic human airway smooth muscle cells hypersecrete VEGF, but the mechanism is unclear. In this study, we defined the mechanism in human airway smooth muscle cells from nonasthmatic and asthmatic patients. We found that asthmatic cells lacked a repression complex at the VEGF promoter, which was present in nonasthmatic cells. Recruitment of G9A, trimethylation of histone H3 at lysine 9 (H3K9me3), and a resultant decrease in RNA polymerase II at the VEGF promoter was critical to repression of VEGF secretion in nonasthmatic cells. At the asthmatic promoter, H3K9me3 was absent because of failed recruitment of G9a; RNA polymerase II binding, in association with TATA-binding protein-associated factor 1, was increased; H3K4me3 was present; and Sp1 binding was exaggerated and sustained. In contrast, DNA methylation and histone acetylation were similar in asthmatic and nonasthmatic cells. This is the first study, to our knowledge, to show that airway cells in asthma have altered epigenetic regulation of remodeling gene(s). Histone methylation at genes such as VEGF may be an important new therapeutic target.
Collapse
|
34
|
Mukherjee A, Wu J, Barbour S, Fang X. Lysophosphatidic acid activates lipogenic pathways and de novo lipid synthesis in ovarian cancer cells. J Biol Chem 2012; 287:24990-5000. [PMID: 22665482 DOI: 10.1074/jbc.m112.340083] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
One of the most common molecular changes in cancer is the increased endogenous lipid synthesis, mediated primarily by overexpression and/or hyperactivity of fatty acid synthase (FAS) and acetyl-CoA carboxylase (ACC). The changes in these key lipogenic enzymes are critical for the development and maintenance of the malignant phenotype. Previous efforts to control oncogenic lipogenesis have been focused on pharmacological inhibitors of FAS and ACC. Although they show anti-tumor effects in culture and in mouse models, these inhibitors are nonselective blockers of lipid synthesis in both normal and cancer cells. To target lipid anabolism in tumor cells specifically, it is important to identify the mechanism governing hyperactive lipogenesis in malignant cells. In this study, we demonstrate that lysophosphatidic acid (LPA), a growth factor-like mediator present at high levels in ascites of ovarian cancer patients, regulates the sterol regulatory element binding protein-FAS and AMP-activated protein kinase-ACC pathways in ovarian cancer cells but not in normal or immortalized ovarian epithelial cells. Activation of these lipogenic pathways is linked to increased de novo lipid synthesis. The pro-lipogenic action of LPA is mediated through LPA(2), an LPA receptor subtype overexpressed in ovarian cancer and other malignancies. Downstream of LPA(2), the G(12/13) and G(q) signaling cascades mediate LPA-dependent sterol regulatory element-binding protein activation and AMP-activated protein kinase inhibition, respectively. Moreover, inhibition of de novo lipid synthesis dramatically attenuated LPA-induced cell proliferation. These results demonstrate that LPA signaling is causally linked to the hyperactive lipogenesis in ovarian cancer cells, which can be exploited for development of new anti-cancer therapies.
Collapse
Affiliation(s)
- Abir Mukherjee
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, School of Medicine, Richmond, Virginia 23298, USA
| | | | | | | |
Collapse
|
35
|
Verret V, Namur J, Ghegediban SH, Wassef M, Moine L, Bonneau M, Pelage JP, Laurent A. Toxicity of Doxorubicin on Pig Liver After Chemoembolization with Doxorubicin-loaded Microspheres: A Pilot DNA-microarrays and Histology Study. Cardiovasc Intervent Radiol 2012; 36:204-12. [DOI: 10.1007/s00270-012-0369-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 02/08/2012] [Indexed: 02/08/2023]
|
36
|
Ferguson RD, Novosyadlyy R, Fierz Y, Alikhani N, Sun H, Yakar S, LeRoith D. Hyperinsulinemia enhances c-Myc-mediated mammary tumor development and advances metastatic progression to the lung in a mouse model of type 2 diabetes. Breast Cancer Res 2012; 14:R8. [PMID: 22226054 PMCID: PMC3496123 DOI: 10.1186/bcr3089] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 10/31/2011] [Accepted: 01/07/2012] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION Hyperinsulinemia, which is common in early type 2 diabetes (T2D) as a result of the chronically insulin-resistant state, has now been identified as a specific factor which can worsen breast cancer prognosis. In breast cancer, a high rate of mortality persists due to the emergence of pulmonary metastases. METHODS Using a hyperinsulinemic mouse model (MKR+/+) and the metastatic, c-Myc-transformed mammary carcinoma cell line Mvt1, we investigated how high systemic insulin levels would affect the progression of orthotopically inoculated primary mammary tumors to lung metastases. RESULTS We found that orthotopically injected Mvt1 cells gave rise to larger mammary tumors and to a significantly higher mean number of pulmonary macrometastases in hyperinsulinemic mice over a period of six weeks (hyperinsulinemic, 19.4 ± 2.7 vs. control, 4.0 ± 1.3). When Mvt1-mediated mammary tumors were allowed to develop and metastasize for approximately two weeks and were then surgically removed, hyperinsulinemic mice demonstrated a significantly higher number of lung metastases after a four-week period (hyperinsulinemic, 25.1 ± 4.6 vs. control, 7.4 ± 0.42). Similarly, when Mvt1 cells were injected intravenously, hyperinsulinemic mice demonstrated a significantly higher metastatic burden in the lung than controls after a three-week period (hyperinsulinemic, 6.0 ± 1.63 vs. control, 1.5 ± 0.68). Analysis of Mvt1 cells both in vitro and in vivo revealed a significant up-regulation of the transcription factor c-Myc under hyperinsulinemic conditions, suggesting that hyperinsulinemia may promote c-Myc signaling in breast cancer. Furthermore, insulin-lowering therapy using the beta-adrenergic receptor agonist CL-316243 reduced metastatic burden in hyperinsulinemic mice to control levels. CONCLUSIONS Hyperinsulinemia in a mouse model promotes breast cancer metastasis to the lung. Therapies to reduce insulin levels in hyperinsulinemic patients suffering from breast cancer could lessen the likelihood of metastatic progression.
Collapse
MESH Headings
- Animals
- Blood Glucose
- Cell Line, Tumor
- Cell Proliferation
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/drug therapy
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/pathology
- Dioxoles/pharmacology
- Dioxoles/therapeutic use
- Female
- Hyperinsulinism/complications
- Hyperinsulinism/drug therapy
- Hyperinsulinism/metabolism
- Hyperinsulinism/pathology
- Hypoglycemic Agents/pharmacology
- Hypoglycemic Agents/therapeutic use
- Insulin/blood
- Lung Neoplasms/metabolism
- Lung Neoplasms/prevention & control
- Lung Neoplasms/secondary
- Mammary Neoplasms, Experimental/etiology
- Mammary Neoplasms, Experimental/metabolism
- Mammary Neoplasms, Experimental/pathology
- Matrix Metalloproteinase 9/metabolism
- Mice
- Mice, Transgenic
- Neoplasm Transplantation
- Phosphorylation
- Proto-Oncogene Proteins c-akt/metabolism
- Proto-Oncogene Proteins c-myc/metabolism
- Receptor, IGF Type 1/metabolism
- Receptor, Insulin/metabolism
- Tumor Burden
- Vascular Endothelial Growth Factor A/metabolism
Collapse
Affiliation(s)
- Rosalyn D Ferguson
- Division of Endocrinology, Diabetes and Bone Diseases, The Samuel Bronfman Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
| | - Ruslan Novosyadlyy
- Division of Endocrinology, Diabetes and Bone Diseases, The Samuel Bronfman Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
| | - Yvonne Fierz
- Division of Endocrinology, Diabetes and Bone Diseases, The Samuel Bronfman Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
| | - Nyosha Alikhani
- Division of Endocrinology, Diabetes and Bone Diseases, The Samuel Bronfman Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
| | - Hui Sun
- Division of Endocrinology, Diabetes and Bone Diseases, The Samuel Bronfman Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
| | - Shoshana Yakar
- Division of Endocrinology, Diabetes and Bone Diseases, The Samuel Bronfman Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
| | - Derek LeRoith
- Division of Endocrinology, Diabetes and Bone Diseases, The Samuel Bronfman Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
| |
Collapse
|
37
|
Oguro A, Imaoka S. Lysophosphatidic acids are new substrates for the phosphatase domain of soluble epoxide hydrolase. J Lipid Res 2012; 53:505-512. [PMID: 22217705 DOI: 10.1194/jlr.m022319] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Soluble epoxide hydrolase (sEH) is a bifunctional enzyme that has a C-terminus epoxide hydrolase domain and an N-terminus phosphatase domain. The endogenous substrates of epoxide hydrolase are known to be epoxyeicosatrienoic acids, but the endogenous substrates of the phosphatase activity are not well understood. In this study, to explore the substrates of sEH, we investigated the inhibition of the phosphatase activity of sEH toward 4-methylumbelliferyl phosphate by using lecithin and its hydrolyzed products. Although lecithin itself did not inhibit the phosphatase activity, the hydrolyzed lecithin significantly inhibited it, suggesting that lysophospholipid or fatty acid can inhibit it. Next, we investigated the inhibition of phosphatase activity by lysophosphatidyl choline, palmitoyl lysophosphatidic acid, monopalmitoyl glycerol, and palmitic acid. Palmitoyl lysophosphatidic acid and fatty acid efficiently inhibited phosphatase activity, suggesting that lysophosphatidic acids (LPAs) are substrates for the phosphatase activity of sEH. As expected, palmitoyl, stearoyl, oleoyl, and arachidonoyl LPAs were efficiently dephosphorylated by sEH (Km, 3-7 μM; Vmax, 150-193 nmol/min/mg). These results suggest that LPAs are substrates of sEH, which may regulate physiological functions of cells via their metabolism.
Collapse
Affiliation(s)
- Ami Oguro
- Research Center for Environmental Bioscience and Department of Bioscience, School of Science and Technology, Kwansei Gakuin University, Sanda, Japan
| | - Susumu Imaoka
- Research Center for Environmental Bioscience and Department of Bioscience, School of Science and Technology, Kwansei Gakuin University, Sanda, Japan.
| |
Collapse
|
38
|
Vaksman O, Stavnes HT, Kaern J, Trope CG, Davidson B, Reich R. miRNA profiling along tumour progression in ovarian carcinoma. J Cell Mol Med 2011; 15:1593-602. [PMID: 20716115 PMCID: PMC3823203 DOI: 10.1111/j.1582-4934.2010.01148.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
MicroRNAs (miRNAs) are small non-coding RNAs that exert a regulatory effect post-transcriptionally by binding target mRNAs and inhibiting gene translation. miRNA expression is deregulated in cancer. The aim of this study was to characterize the differences in miRNA expression pattern and the miRNA-regulating machinery between ovarian carcinoma (OC) cells in primary tumours versus effusions. Using miRNA array platforms, we analysed a set of 21 tumours (13 effusions, 8 primary carcinomas) and identified three sets of miRNAs, one that is highly expressed in both primary carcinomas and effusions, one overexpressed in primary carcinomas and one overexpressed in effusions. Levels of selected miRNAs were analysed using quantitative PCR in an independent set of 45 additional tumours (30 effusions, 15 primary carcinomas). Reduced miR-145 and miR-214 and elevated let-7f, miR-182, miR-210, miR-200c, miR-222 and miR-23a levels were found in effusions in both sets. In silico target prediction programs identified potential target genes for some of the differentially expressed miRNAs. Expression of zinc finger E-box binding homeobox (ZEB)1 and c-Myc, targets of miR-200c, as well as of p21 protein (Cdc42/Rac)-activated kinase (PAK)1 and phosphatase and tensin homologue deleted on chromosome 10 (PTEN), predicted targets of miR-222, were analysed. Inverse correlations between expression levels of the indicated miRNAs and of the predicted target genes were found. In addition, higher expression of the miRNA-processing molecules Ago1, Ago2 and Dicer was observed in effusions compared to primary carcinomas. In conclusion, our data are the first to document different miRNA expression and regulation profiles in primary and metastatic OC, suggesting a role for these molecules in tumour progression.
Collapse
Affiliation(s)
- Olga Vaksman
- Institute of Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | | | | | | | | | | |
Collapse
|
39
|
Law AYS, Yeung BHY, Ching LY, Wong CKC. Sp1 is a transcription repressor to stanniocalcin-1 expression in TSA-treated human colon cancer cells, HT29. J Cell Biochem 2011; 112:2089-96. [PMID: 21465530 DOI: 10.1002/jcb.23127] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Our previous study demonstrated that, stanniocalcin-1 (STC1) was a target of histone deacetylase (HDAC) inhibitors and was involved in trichostatin A (TSA) induced apoptosis in the human colon cancer cells, HT29. In this study, we reported that the transcriptional factor, specificity protein 1 (Sp1) in association with retinoblastoma (Rb) repressed STC1 gene transcription in TSA-treated HT29 cells. Our data demonstrated that, a co-treatment of the cells with TSA and Sp1 inhibitor, mithramycin A (MTM) led to a marked synergistic induction of STC1 transcript levels, STC1 promoter (1 kb)-driven luciferase activity and an increase of apoptotic cell population. The knockdown of Sp1 gene expression in TSA treated cells, revealed the repressor role of Sp1 in STC1 transcription. Using a protein phosphatase inhibitor okadaic acid (OKA), an increase of Sp1 hyperphosphorylation and so a reduction of its transcriptional activity, led to a significant induction of STC1 gene expression. Chromatin immunoprecipitation (ChIP) assay revealed that Sp1 binding on STC1 proximal promoter in TSA treated cells. The binding of Sp1 to STC1 promoter was abolished by the co-treatment of MTM or OKA in TSA-treated cells. Re-ChIP assay illustrated that Sp1-mediated inhibition of STC1 transcription was associated with the recruitment of another repressor molecule, Rb. Collectively our findings identify STC1 is a downstream target of Sp1.
Collapse
Affiliation(s)
- Alice Y S Law
- Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong
| | | | | | | |
Collapse
|
40
|
Wu J, Mukherjee A, Lebman DA, Fang X. Lysophosphatidic acid-induced p21Waf1 expression mediates the cytostatic response of breast and ovarian cancer cells to TGFβ. Mol Cancer Res 2011; 9:1562-70. [PMID: 21890597 DOI: 10.1158/1541-7786.mcr-11-0340] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Lysophosphatidic acid (LPA) is a multifunctional intercellular phospholipid mediator present in blood and other biological fluids. In cancer cells, LPA stimulates expression or activity of inflammatory cytokines, angiogenic factors, matrix metalloproteinases, and other oncogenic proteins. In this study, we showed that LPA upregulated expression of the cyclin-dependent kinase inhibitor p21(Waf1) in TGFβ-sensitive breast and ovarian cancer cells, but not in TGFβ-resistant ones. We examined the possibility that LPA-induced p21 might contribute to the cytostatic response to TGFβ. In serum-free conditions, TGFβ alone induced p21 expression weakly in TGFβ-sensitive cells. Serum or serum-borne LPA cooperated with TGFβ to elicit the maximal p21 induction. LPA stimulated p21 via LPA(1) and LPA(2) receptors and Erk-dependent activation of the CCAAT/enhancer binding protein beta transcription factor independent of p53. Loss or gain of p21 expression led to a shift between TGFβ-sensitive and -resistant phenotypes in breast and ovarian cancer cells, indicating that p21 is a key determinant of the growth inhibitory activity of TGFβ. Our results reveal a novel cross-talk between LPA and TGFβ that underlies TGFβ-sensitive and -resistant phenotypes of breast and ovarian cancer cells.
Collapse
Affiliation(s)
- Jinhua Wu
- Virginia Commonwealth University School of Medicine, Department of Biochemistry and Molecular Biology, Richmond, VA 23298, USA
| | | | | | | |
Collapse
|
41
|
Dutta S, Wang FQ, Wu HS, Mukherjee TJ, Fishman DA. The NF-κB pathway mediates lysophosphatidic acid (LPA)-induced VEGF signaling and cell invasion in epithelial ovarian cancer (EOC). Gynecol Oncol 2011; 123:129-37. [PMID: 21782227 DOI: 10.1016/j.ygyno.2011.06.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Revised: 06/07/2011] [Accepted: 06/08/2011] [Indexed: 01/27/2023]
Abstract
OBJECTIVES Our previous report has implicated the involvement of VEGF-VEGFR-2 h signaling in LPA-induced EOC invasion. However, the mechanism by which LPA regulates VEGF and VEGFR-2 expression remains to be elucidated. In the present study, we systematically examined the signal transduction pathways activated by LPA and further evaluated whether LPA's effect on VEGF-VEGFR-2 signaling and EOC invasion was mediated by the activation of NF-κB pathway. METHODS Using a signal transduction PathwayFinder PCR array, we examined the expression change of 86 key genes representing 18 signal transduction pathways in DOV13 and SKOV3 cells upon LPA (20 μM) treatment. We also used quantitative PCR, Western blotting and ELISA to evaluate the effect of NF-κB pathway inhibition on VEGF(121), VEGF(165) and VEGFR-2 mRNA and protein expression/secretion with or without the presence of LPA (20 μM) in SKOV3. Cell invasion under various treatment conditions was assessed by Matrigel invasion assay and MMP-2 secretion was detected by gelatin zymography. RESULTS Our results showed that in both DOV13 and SKOV3, several of the NF-κB pathway components, such as TNF, are consistently activated by LPA stimulation. In addition, treatment with an NF-κB pathway activation inhibitor, at 10 μM, significantly decreased LPA-induced VEGF(121), VEGF(165) and VEGFR-2 mRNA expression and VEGF secretion, as well as LPA-induced SKOV3 invasion (p<0.05). When combined with an EGFR inhibitor, NF-κB pathway inhibition exhibited a significantly stronger effect than used alone (p<0.05) on reducing LPA-induced VEGF secretion and cell invasion. Additionally, NF-κB inhibition also decreased LPA-induced MMP-2 secretion and MMP-1 expression (p<0.05). CONCLUSIONS These results suggest that the NF-κB pathway plays an important role in LPA-induced VEGF signaling and EOC invasion and targeting this pathway may reveal potential therapeutic options for metastatic EOC.
Collapse
Affiliation(s)
- Sonia Dutta
- Department of Obstetrics, Gynecology and Reproductive Sciences, Mount Sinai School of Medicine, New York, NY 10029, USA
| | | | | | | | | |
Collapse
|
42
|
Chen RX, Xia YH, Xue TC, Ye SL. Transcription factor c-Myb promotes the invasion of hepatocellular carcinoma cells via increasing osteopontin expression. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2010; 29:172. [PMID: 21190594 PMCID: PMC3023683 DOI: 10.1186/1756-9966-29-172] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2010] [Accepted: 12/30/2010] [Indexed: 01/04/2023]
Abstract
Background Specific gene expression is tightly regulated by various transcription factors. Osteopontin (OPN) is a phosphoprotein that mediates hepatocellular carcinoma (HCC) progression and metastasis. However, the mechanism of OPN up-regulation in HCC metastasis remains to be clarified. Methods Oligonucleotide array-based transcription factor assays were applied to compare different activities of transcription factors in two human HCC cell lines with different OPN expression levels. The effects of one selected transcription factor on OPN expression were further evaluated. Results Eleven transcription factors were over-expressed in metastatic HCC cell line HCCLM6 cells whereas twelve transcription factors were down-regulated. Electrophoretic mobility shift assays (EMSA) and reporter gene assays showed that one of up-regulated transcription factors c-Myb could bind the OPN promoter and increase its transcription activity. In addition, small interfering RNA targeting c-Myb could inhibit OPN expression and significantly decrease migration and invasion of HCCLM6 cells in vitro. Conclusion Our data first demonstrate that c-Myb has a functionally important role in the regulation of OPN expression in HCC cells, suggesting that c-Myb might be a new target to control HCC metastasis.
Collapse
Affiliation(s)
- Rong-Xin Chen
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, China
| | | | | | | |
Collapse
|
43
|
Abstract
Defects in lipid metabolism have been found to be linked to several diseases, among which atherosclerosis, hypertension, obesity, and diabetes are the most important. Although cancer is chiefly a genetic disease, dietary lipid intake and metabolism are related to some cancer risks, including the risk for ovarian cancer. Higher intake of dietary lipids, systemic lipid metabolism malfunction, and abnormal serum lipid levels are somehow related to ovarian cancer. Overexpression of some lipid metabolic enzymes are also found in ovarian cancer. In this review article, we summarize the relationships between lipid intake, lipid metabolism, and ovarian cancer.
Collapse
Affiliation(s)
- M Tania
- Department of Biochemistry, School of Biological Science and Technology, Central South University, Changsha, Hunan, PR China
| | | | | |
Collapse
|
44
|
Poulin S, Thompson C, Thivierge M, Véronneau S, McMahon S, Dubois CM, Stankova J, Rola-Pleszczynski M. Cysteinyl-leukotrienes induce vascular endothelial growth factor production in human monocytes and bronchial smooth muscle cells. Clin Exp Allergy 2010; 41:204-17. [PMID: 21121979 DOI: 10.1111/j.1365-2222.2010.03653.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Cysteinyl leukotrienes (cysLTs) are suggested to be implicated in the process of airway remodelling in asthma. OBJECTIVE We investigated the potential for cysLTs to modulate vascular endothelial growth factor (VEGF) expression, a growth factor involved in the angiogenesis of airway remodelling. METHODS VEGF mRNA and protein were quantified by real-time PCR and ELISA, respectively. VEGF promoter activation was assessed using luciferase gene-tagged promoter constructs. RESULTS We found that LTD(4) induction of VEGF in human monocytes and bronchial smooth muscle cells is cysLT1 dependent. Stimulation of HEK293 cells stably expressing cysLT1 or cysLT2 with cysLTs showed a concentration-dependent activation of the VEGF promoter and a time-dependent increase in VEGF mRNA and protein. For the cysLT1-mediated response, mutations of hypoxia-induced factor-1 (HIF-1) sites failed to reduce cysLT-induced VEGF promoter activation and 5' deletions showed that the proximal region containing one AP-1 and four specificity protein 1 (Sp1) sites was necessary. Pretreatment with inhibitors of c-Jun N-terminal kinase (JNK) and extracellular signal-regulated kinase (ERK), but not p38, and an overexpression of dominant negative forms of c-Jun, c-Fos or Ras suggested the implication of mitogen-activated protein kinases and AP-1. Mutation of the AP-1-binding element failed to prevent VEGF transactivation suggesting that AP-1 might not act directly on the promoter. Moreover, inhibition of Sp1-dependent transcription by mithramycin completely inhibited VEGF promoter transactivation and VEGF mRNA expression by LTD(4) . Finally, mutations of Sp1 binding elements prevented VEGF promoter transactivation. CONCLUSION AND CLINICAL RELEVANCE Our data indicate for the first time that cysLTs can transcriptionally activate VEGF production via cysLT1 receptors, with the involvement of JNK, ERK, the AP-1 complex and Sp1. These findings suggest that cysLTs may be important in the angiogenic process of airway remodelling and potentially provide a previously unknown benefit of using cysLT1 receptor antagonists in the prevention or treatment of airway remodelling in asthma.
Collapse
Affiliation(s)
- S Poulin
- Department of Pediatrics, Division of Immunology and Allergy, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | | | | | | | | | | | | | | |
Collapse
|
45
|
Jeon ES, Heo SC, Lee IH, Choi YJ, Park JH, Choi KU, Park DY, Suh DS, Yoon MS, Kim JH. Ovarian cancer-derived lysophosphatidic acid stimulates secretion of VEGF and stromal cell-derived factor-1 alpha from human mesenchymal stem cells. Exp Mol Med 2010; 42:280-93. [PMID: 20177148 DOI: 10.3858/emm.2010.42.4.027] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Lysophosphatidic acid (LPA) stimulates growth and invasion of ovarian cancer cells and tumor angiogenesis. Cancer-derived LPA induces differentiation of human adipose tissue-derived mesenchymal stem cells (hASCs) to alpha-smooth muscle actin (alpha-SMA)-positive cancer-associated fibroblasts. Presently, we explored whether cancer-derived LPA regulates secretion of pro-angiogenic factors from hASCs. Conditioned medium (CM) from the OVCAR-3 and SKOV3 ovarian cancer cell lines stimulated secretion angiogenic factors such as stromal-derived factor-1 alpha (SDF-1 alpha) and VEGF from hASCs. Pretreatment with the LPA receptor inhibitor Ki16425 or short hairpin RNA lentiviral silencing of the LPA((1)) receptor abrogated the cancer CM-stimulated expression of alpha-SMA, SDF-1, and VEGF from hASCs. LPA induced expression of myocardin and myocardin-related transcription factor-A, transcription factors involved in smooth muscle differentiation, in hASCs. siRNA-mediated depletion of endogenous myocardin and MRTF-A abrogated the expression of alpha-SMA, but not SDF-1 and VEGF. LPA activated RhoA in hASCs and pretreatment with the Rho kinase inhibitor Y27632 completely abrogated the LPA-induced expression of alpha-SMA, SDF-1, and VEGF in hASCs. Moreover, LPA-induced alpha-SMA expression was abrogated by treatment with the ERK inhibitor U0126 or the phosphoinositide-3-kinase inhibitor LY294002, but not the PLC inhibitor U73122. LPA-induced VEGF secretion was inhibited by LY294002, whereas LPA-induced SDF-1 secretion was markedly attenuated by U0126, U73122, and LY294002. These results suggest that cancer-secreted LPA induces differentiation of hASCs to cancer-associated fibroblasts through multiple signaling pathways involving Rho kinase, ERK, PLC, and phosphoinositide-3-kinase.
Collapse
Affiliation(s)
- Eun Su Jeon
- Medical Research Center for Ischemic Tissue Regeneration, Medical Research Institute, School of Medicine, Pusan National University, Yangsan 626-870, Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Lee KJ, Lee KM, Jo S, Kang KW, Park CS. Induction of cereblon by NF-E2-related factor 2 in neuroblastoma cells exposed to hypoxia-reoxygenation. Biochem Biophys Res Commun 2010; 399:711-5. [DOI: 10.1016/j.bbrc.2010.08.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Accepted: 08/02/2010] [Indexed: 10/19/2022]
|
47
|
Mehedint MG, Craciunescu CN, Zeisel SH. Maternal dietary choline deficiency alters angiogenesis in fetal mouse hippocampus. Proc Natl Acad Sci U S A 2010; 107:12834-9. [PMID: 20624989 PMCID: PMC2919920 DOI: 10.1073/pnas.0914328107] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
We examined whether maternal dietary choline modulates angiogenesis in fetal brain. Pregnant C57BL/6 mice were fed either a choline-deficient (CD), control (CT), or choline-supplemented diet (CS) from days 12 to 17 (E12-17) of pregnancy and then fetal brains were studied. In CD fetal hippocampus, proliferation of endothelial cells (EC) was decreased by 32% (p < 0.01 vs. CT or CS) while differentiated EC clusters (expressing factor VIII related antigen (RA)) increased by 25% (p < 0.01 vs. CT or CS). These changes were associated with > 25% decrease in the number of blood vessels in CD fetal hippocampus (p < 0.01 vs. CT and CS), with no change in total cross-sectional area of these blood vessels. Expression of genes for the angiogenic signals derived from both endothelial and neuronal progenitor cells (NPC) was increased in CD fetal hippocampus VEGF C (Vegfc), 2.0-fold, p < 0.01 vs. CT and angiopoietin 2 (Angpt2), 2.1-fold, (p < 0.01 vs. CT)). Similar increased expression was observed in NPC isolated from E14 fetal mouse brains and exposed to low (5 microM), CT (70 microM), or high choline (280 microM) media for 72 h (low choline caused a 9.7-fold increase in relative gene expression of Vegfc (p < 0.001 vs. CT and high) and a 3.4-fold increase in expression of Angpt2, (p < 0.05 vs. CT and high). ANGPT2 protein was increased 42.2% (p < 0.01). Cytosine-phosphate-guanine dinucleotide islands in the proximity of the promoter areas of Vegfc and Angpt2 were hypomethylated in low choline NPC compared to CT NPC (p < 0.01). We conclude that maternal dietary choline intake alters angiogenesis in the developing fetal hippocampus.
Collapse
Affiliation(s)
- Mihai G. Mehedint
- University of North Carolina Nutrition Research Institute at Kannapolis, University of North Carolina at Chapel Hill, Kannapolis, NC 28081
| | - Corneliu N. Craciunescu
- University of North Carolina Nutrition Research Institute at Kannapolis, University of North Carolina at Chapel Hill, Kannapolis, NC 28081
| | - Steven H. Zeisel
- University of North Carolina Nutrition Research Institute at Kannapolis, University of North Carolina at Chapel Hill, Kannapolis, NC 28081
| |
Collapse
|
48
|
Gordon FE, Nutt CL, Cheunsuchon P, Nakayama Y, Provencher KA, Rice KA, Zhou Y, Zhang X, Klibanski A. Increased expression of angiogenic genes in the brains of mouse meg3-null embryos. Endocrinology 2010; 151:2443-52. [PMID: 20392836 PMCID: PMC2875815 DOI: 10.1210/en.2009-1151] [Citation(s) in RCA: 132] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Maternally expressed gene 3 (MEG3) is a noncoding RNA highly expressed in the normal human brain and pituitary. Expression of MEG3 is lost in gonadotroph-derived clinically nonfunctioning pituitary adenomas. Meg3 knockout mice were generated to identify targets and potential functions of this gene in embryonic development and tumorigenesis. Gene expression profiles were compared in the brains of Meg3-null embryos and wild-type littermate controls using microarray analysis. Microarray data were analyzed with GeneSifter, which uses Kyoto Encyclopedia of Genes and Genomes pathways and Gene Ontology classifications to identify signaling cascades and functional categories of interest within the dataset. Differences were found in signaling pathways and ontologies related to angiogenesis between wild-type and knockout embryos. Quantitative RT-PCR and immunohistological staining showed increased expression of some Vascular Endothelial Growth Factor pathway genes and increased cortical microvessel density in the Meg3-null embryos. In conclusion, Meg3 may play an important role in control of vascularization in the brain and may function as a tumor suppressor in part by inhibiting angiogenesis.
Collapse
Affiliation(s)
- Francesca E Gordon
- Neuroendocrine Unit, Bulfinch 457B, Massachusetts General Hospital, 55 Fruit Street, Boston, Massachusetts 02114, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Xu X, Prestwich GD. Inhibition of tumor growth and angiogenesis by a lysophosphatidic acid antagonist in an engineered three-dimensional lung cancer xenograft model. Cancer 2010; 116:1739-50. [PMID: 20143443 DOI: 10.1002/cncr.24907] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND : We developed an engineered three-dimensional (3D) tumor xenograft model of nonsmall cell lung cancer (NSCLC) in nude mice, and we used this model to evaluate a dual-activity inhibitor of lysophosphatidic acid (LPA) biosynthesis and receptor activation. METHODS : First, BrP-LPA, a pan-antagonist for 4 LPA receptors and inhibitor of the lyosphospholipase D activity of autotaxin, was examined for inhibition of cell migration and cell invasion by human NSCLC A549 cells. Second, A549 cells were encapsulated in 3D in 3 semisynthetic extracellular matrices (ECMs) based on chemically modified glycosaminoglycans, and injected subcutaneously in nude mice. Tumor volume and vascularity were determined as a function of semisynthetic ECMs composition. Third, engineered NSCLC xenografts were formed from A549 cells in either Extracel-HP or Matrigel, and mice were treated with 4 intraperitoneal injections of 3 mg/kg of BrP-LPA. RESULTS : First, BrP-LPA inhibited cell migration and invasiveness of A549 cells in vitro. Second, tumor growth and microvessel formation for 3D encapsulated A549 cells in vivo in nude mice increased in the following order: buffer only < Extracel < Extracel-HP < Extracel-HP containing growth factorss plus laminin. Third, tumor volumes increased rapidly in both Matrigel and Extracel-HP encapsulated A549 cells, and tumor growth was markedly inhibited by BrP-LPA treatment. Finally, tumor vascularization was dramatically reduced in the A549 tumors treated with BrP-LPA. CONCLUSIONS : Engineered A549 lung tumors can be created by 3D encapsulation in an ECM substitute with user controlled composition. The engineered tumors regress and lose vascularity in response to a dual activity inhibitor of the LPA signaling pathway. Cancer 2010. (c) 2010 American Cancer Society.
Collapse
Affiliation(s)
- Xiaoyu Xu
- Department of Medicinal Chemistry and The Center for Therapeutic Biomaterials, The University of Utah, Salt Lake City, Utah, USA
| | | |
Collapse
|
50
|
Choi JW, Herr DR, Noguchi K, Yung YC, Lee CW, Mutoh T, Lin ME, Teo ST, Park KE, Mosley AN, Chun J. LPA receptors: subtypes and biological actions. Annu Rev Pharmacol Toxicol 2010; 50:157-86. [PMID: 20055701 DOI: 10.1146/annurev.pharmtox.010909.105753] [Citation(s) in RCA: 643] [Impact Index Per Article: 45.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Lysophosphatidic acid (LPA) is a small, ubiquitous phospholipid that acts as an extracellular signaling molecule by binding to and activating at least five known G protein-coupled receptors (GPCRs): LPA(1)-LPA(5). They are encoded by distinct genes named LPAR1-LPAR5 in humans and Lpar1-Lpar5 in mice. The biological roles of LPA are diverse and include developmental, physiological, and pathophysiological effects. This diversity is mediated by broad and overlapping expression patterns and multiple downstream signaling pathways activated by cognate LPA receptors. Studies using cloned receptors and genetic knockout mice have been instrumental in uncovering the significance of this signaling system, notably involving basic cellular processes as well as multiple organ systems such as the nervous system. This has further provided valuable proof-of-concept data to support LPA receptors and LPA metabolic enzymes as targets for the treatment of medically important diseases that include neuropsychiatric disorders, neuropathic pain, infertility, cardiovascular disease, inflammation, fibrosis, and cancer.
Collapse
Affiliation(s)
- Ji Woong Choi
- Department of Molecular Biology, Helen L. Dorris Institute for Neurological and Psychiatric Disorders, The Scripps Research Institute, La Jolla, California 92037, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|