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Lai A, Sun J, Dai Z, Guo L, Tao D, Li H, Chen B, Zhou R. Unraveling IGFBP3-mediated m6A modification in fracture healing. Pathol Res Pract 2024; 255:155220. [PMID: 38432050 DOI: 10.1016/j.prp.2024.155220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/24/2023] [Accepted: 02/18/2024] [Indexed: 03/05/2024]
Abstract
BACKGROUND This study investigates the role of IGFBP3-mediated m6A modification in regulating the miR-23a-3p/SMAD5 axis and its impact on fracture healing, aiming to provide insights into potential therapeutic targets. METHODS Utilizing fracture-related datasets, we identified m6A modification-related mRNA and predicted miR-23a-3p as a regulator of SMAD5. We established a mouse fracture healing model and conducted experiments, including Micro-CT, RT-qPCR, Alizarin Red staining, and Alkaline phosphatase (ALP) staining, to assess gene expression and osteogenic differentiation. RESULTS IGFBP3 emerged as a crucial player in fracture healing, stabilizing miR-23a-3p through m6A modification, leading to SMAD5 downregulation. This, in turn, inhibited osteogenic differentiation and delayed fracture healing. Inhibition of IGFBP3 partially reversed through SMAD5 inhibition, restoring osteogenic differentiation and fracture healing in vivo. CONCLUSION The IGFBP3/miR-23a-3p/SMAD5 axis plays a pivotal role in fracture healing, highlighting the relevance of m6A modification. IGFBP3's role in stabilizing miR-23a-3p expression through m6A modification offers a potential therapeutic target for enhancing fracture healing outcomes.
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Affiliation(s)
- Aining Lai
- Section Ⅱ, Department of Orthopedics, the 72nd Army Hospital of PLA, Huzhou 313000, P. R. China
| | - Junjian Sun
- Section Ⅴ, Department of Orthopedics, the 72nd Army Hospital of PLA, Huzhou 31300, PR China
| | - Zhiyuan Dai
- Thoracic surgey, the 72nd Army Hospital of PLA, Huzhou 313000, PR China
| | - Long Guo
- Section Ⅱ, Department of Orthopedics, the 72nd Army Hospital of PLA, Huzhou 313000, P. R. China
| | - Degang Tao
- Section Ⅱ, Department of Orthopedics, the 72nd Army Hospital of PLA, Huzhou 313000, P. R. China
| | - Haitang Li
- Section Ⅱ, Department of Orthopedics, the 72nd Army Hospital of PLA, Huzhou 313000, P. R. China
| | - Bin Chen
- Section Ⅱ, Department of Orthopedics, the 72nd Army Hospital of PLA, Huzhou 313000, P. R. China.
| | - Rong Zhou
- Section Ⅱ, Department of Orthopedics, the 72nd Army Hospital of PLA, Huzhou 313000, P. R. China.
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Samaržija I. The Potential of Extracellular Matrix- and Integrin Adhesion Complex-Related Molecules for Prostate Cancer Biomarker Discovery. Biomedicines 2023; 12:79. [PMID: 38255186 PMCID: PMC10813710 DOI: 10.3390/biomedicines12010079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 12/16/2023] [Accepted: 12/26/2023] [Indexed: 01/24/2024] Open
Abstract
Prostate cancer is among the top five cancer types according to incidence and mortality. One of the main obstacles in prostate cancer management is the inability to foresee its course, which ranges from slow growth throughout years that requires minimum or no intervention to highly aggressive disease that spreads quickly and resists treatment. Therefore, it is not surprising that numerous studies have attempted to find biomarkers of prostate cancer occurrence, risk stratification, therapy response, and patient outcome. However, only a few prostate cancer biomarkers are used in clinics, which shows how difficult it is to find a novel biomarker. Cell adhesion to the extracellular matrix (ECM) through integrins is among the essential processes that govern its fate. Upon activation and ligation, integrins form multi-protein intracellular structures called integrin adhesion complexes (IACs). In this review article, the focus is put on the biomarker potential of the ECM- and IAC-related molecules stemming from both body fluids and prostate cancer tissue. The processes that they are involved in, such as tumor stiffening, bone turnover, and communication via exosomes, and their biomarker potential are also reviewed.
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Affiliation(s)
- Ivana Samaržija
- Laboratory for Epigenomics, Division of Molecular Medicine, Ruđer Bošković Institute, 10000 Zagreb, Croatia
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3
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Mao L, Wang L, Xu J, Zou J. The role of integrin family in bone metabolism and tumor bone metastasis. Cell Death Discov 2023; 9:119. [PMID: 37037822 PMCID: PMC10086008 DOI: 10.1038/s41420-023-01417-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 03/21/2023] [Accepted: 03/24/2023] [Indexed: 04/12/2023] Open
Abstract
Integrins have been the research focus of cell-extracellular matrix adhesion (ECM) and cytokine receptor signal transduction. They are involved in the regulation of bone metabolism of bone precursor cells, mesenchymal stem cells (MSCs), osteoblasts (OBs), osteoclasts (OCs), and osteocytes. Recent studies expanded and updated the role of integrin in bone metabolism, and a large number of novel cytokines were found to activate bone metabolism pathways through interaction with integrin receptors. Integrins act as transducers that mediate the regulation of bone-related cells by mechanical stress, fluid shear stress (FSS), microgravity, hypergravity, extracellular pressure, and a variety of physical factors. Integrins mediate bone metastasis of breast, prostate, and lung cancer by promoting cancer cell adhesion, migration, and survival. Integrin-mediated targeted therapy showed promising prospects in bone metabolic diseases. This review emphasizes the latest research results of integrins in bone metabolism and bone metastasis and provides a vision for treatment strategies.
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Affiliation(s)
- Liwei Mao
- School of Kinesiology, Shanghai University of Sport, 200438, Shanghai, China
| | - Lian Wang
- School of Kinesiology, Shanghai University of Sport, 200438, Shanghai, China
| | - Jiake Xu
- School of Biomedical Sciences, The University of Western Australia, WA, 6009, Perth, Australia
| | - Jun Zou
- School of Kinesiology, Shanghai University of Sport, 200438, Shanghai, China.
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4
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Zer NS, Ben-Ghedalia-Peled N, Gheber LA, Vago R. CD44 in Bone Metastasis Development: A Key Player in the Fate Decisions of the Invading Cells? Clin Exp Metastasis 2023; 40:125-135. [PMID: 37038009 DOI: 10.1007/s10585-023-10203-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 03/10/2023] [Indexed: 04/12/2023]
Abstract
A participant in key developmental processes, the adhesion glycoprotein CD44 is also expressed in several types of malignancies and can promote metastasis. In addition, the expression of CD44 isoforms in different types of cancer such as prostate and breast cancers may facilitate bone metastases by enhancing tumorigenicity, osteomimicry, cell migration, homing to bone, and anchorage within the bone specialized domains. Moreover, there is evidence that the CD44-ICD fragments in breast cancer cells may promote the cells' osteolytic nature. Yet the mechanisms by which CD44 and its downstream effectors promote the establishment of these cells within the bone are not fully elucidated. In this review, we summarize the current data on the roles played by CD44 in cancer progression and bone metastasis and the possible effects of its interaction with the different components of the bone marrow milieu.
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Affiliation(s)
- Noy Shir Zer
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
| | - Noa Ben-Ghedalia-Peled
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
| | - Levi A Gheber
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
| | - Razi Vago
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel.
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Huang B, Liu H, Chan S, Liu J, Gu J, Chen M, Kuang L, Li X, Zhang X, Li J. RUNX2 promotes the suppression of osteoblast function and enhancement of osteoclast activity by multiple myeloma cells. Med Oncol 2023; 40:115. [PMID: 36897488 PMCID: PMC10006269 DOI: 10.1007/s12032-023-01960-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 01/27/2023] [Indexed: 03/11/2023]
Abstract
RUNX2 is a transcription factor that participates in osteoblast differentiation and chondrocyte maturation and plays an important role in the invasion and metastasis of cancers. With the deepening of research, evidence has indicated the correlation between RUNX2 and bone destruction in cancers. However, the mechanisms underlying its role in multiple myeloma remain unclear. By observing the induction effects of conditioned medium from myeloma cells on preosteoblasts (MC3T3-E1) and preosteoclasts (RAW264.7) and constructing myeloma-bearing mice, we found that RUNX2 promotes bone destruction in multiple myeloma. In vitro, conditioned medium from RUNX2-overexpressing myeloma cells reduced osteoblast activity and increased osteoclast activity. In vivo, RUNX2 expression was positively correlated with bone loss in myeloma-bearing mice. These results suggest that therapeutic inhibition of RUNX2 may protect against bone destruction by maintaining the balance between osteoblast and osteoclast activity in multiple myeloma.
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Affiliation(s)
- Beihui Huang
- Department of Hematopathology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan 2Nd Road, Guangzhou, 510080, China
| | - Huixin Liu
- Department of Hematopathology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan 2Nd Road, Guangzhou, 510080, China
| | - Szehoi Chan
- Department of Pharmacology, School of Medicine, Molecular Cancer Research Center, Sun Yat-Sen University, No.66, Gongchang Road, Shenzhen, 518107, China
| | - Junru Liu
- Department of Hematopathology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan 2Nd Road, Guangzhou, 510080, China
| | - Jingli Gu
- Department of Hematopathology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan 2Nd Road, Guangzhou, 510080, China
| | - Meilan Chen
- Department of Hematopathology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan 2Nd Road, Guangzhou, 510080, China
| | - Lifen Kuang
- Department of Hematopathology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan 2Nd Road, Guangzhou, 510080, China
| | - Xiaozhe Li
- Department of Hematopathology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan 2Nd Road, Guangzhou, 510080, China
| | - Xingding Zhang
- Department of Pharmacology, School of Medicine, Molecular Cancer Research Center, Sun Yat-Sen University, No.66, Gongchang Road, Shenzhen, 518107, China.
| | - Juan Li
- Department of Hematopathology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan 2Nd Road, Guangzhou, 510080, China.
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Song X, Liu J, Liu B, Piao C, Kong C, Li Z. RUNX2 interacts with SCD1 and activates Wnt/β-catenin signaling pathway to promote the progression of clear cell renal cell carcinoma. Cancer Med 2023; 12:5764-5780. [PMID: 36200301 PMCID: PMC10028032 DOI: 10.1002/cam4.5326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 07/13/2022] [Accepted: 09/20/2022] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Previous studies have demonstrated that Runt-associated transcription factor 2 (RUNX2) serves as the main transcription factor for osteoblast differentiation and chondrocyte maturation. RUNX2 is related to a variety of tumors, particularly tumor invasion and metastasis, while the expression and molecular mechanisms of RUNX2 in clear cell renal cell carcinoma (ccRCC) keep to be determined. Stearyl CoA desaturase 1 (SCD1), an endoplasmic reticulum fatty acid desaturase, transfers saturated fatty acids to monounsaturated fatty acids, is expressed highly in numerous malignancies. METHODS The Cancer Genome Atlas (TCGA) datebase and Western blot was used to analyzed the mRNA and protein levels of the target gene in ccRCC tissues and adjacent tissues. The proliferation ability of ccRCC cells was tested by colony forming and EdU assay. The migration ability of cells was detected by transwell assay. Immunoprecipitation was utilized to detect protein-protein interaction. Cycloheximide chase assay was used to measure the half-life of SCD1 protein. RESULTS In this study, the expressions of RUNX2 and SCD1 are increased in ccRCC tissues as well as ccRCC cell lines. Both RUNX2 and SCD1 could promote proliferation and migration in ccRCC cells. Furthermore, RUNX2 could physically interact with SCD1. In addition, the functional degradation and the inactivation of Wnt/β-catenin signaling pathway triggered by the downregulation of RUNX2 could be partly offset by the overexpression of SCD1. CONCLUSION The findings indicate that the RUNX2/SCD1 axis may act as a potential therapeutic target via the Wnt/β-catenin signaling pathway of ccRCC.
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Affiliation(s)
- Xiandong Song
- Department of Urology, The First Hospital of China Medical University, Shenyang, Liaoning, P. R. China
| | - Junlong Liu
- Department of Urology, The First Hospital of China Medical University, Shenyang, Liaoning, P. R. China
| | - Bitian Liu
- Department of Urology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, P. R. China
| | - Chiyuan Piao
- Department of Urology, The First Hospital of China Medical University, Shenyang, Liaoning, P. R. China
| | - Chuize Kong
- Department of Urology, The First Hospital of China Medical University, Shenyang, Liaoning, P. R. China
| | - Zhenhua Li
- Department of Urology, The First Hospital of China Medical University, Shenyang, Liaoning, P. R. China
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Tommasi C, Pellegrino B, Diana A, Palafox Sancez M, Orditura M, Scartozzi M, Musolino A, Solinas C. The Innate Immune Microenvironment in Metastatic Breast Cancer. J Clin Med 2022; 11:jcm11205986. [PMID: 36294305 PMCID: PMC9604853 DOI: 10.3390/jcm11205986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 09/27/2022] [Accepted: 10/09/2022] [Indexed: 11/30/2022] Open
Abstract
The immune system plays a fundamental role in neoplastic disease. In the era of immunotherapy, the adaptive immune response has been in the spotlight whereas the role of innate immunity in cancer development and progression is less known. The tumor microenvironment influences the terminal differentiation of innate immune cells, which can explicate their pro-tumor or anti-tumor effect. Different cells are able to recognize and eliminate no self and tumor cells: macrophages, natural killer cells, monocytes, dendritic cells, and neutrophils are, together with the elements of the complement system, the principal players of innate immunity in cancer development and evolution. Metastatic breast cancer is a heterogeneous disease from the stromal, immune, and biological point of view and requires deepened exploration to understand different patient outcomes. In this review, we summarize the evidence about the role of innate immunity in breast cancer metastatic sites and the potential targets for optimizing the innate response as a novel treatment opportunity.
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Affiliation(s)
- Chiara Tommasi
- Medical Oncology and Breast Unit, University Hospital of Parma, 43126 Parma, Italy
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy
- GOIRC (Gruppo Oncologico Italiano di Ricerca Clinica), 43126 Parma, Italy
- Correspondence:
| | - Benedetta Pellegrino
- Medical Oncology and Breast Unit, University Hospital of Parma, 43126 Parma, Italy
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy
- GOIRC (Gruppo Oncologico Italiano di Ricerca Clinica), 43126 Parma, Italy
| | - Anna Diana
- Medical Oncology Unit, Ospedale del Mare, 80147 Naples, Italy
| | - Marta Palafox Sancez
- Tumor Heterogeneity, Metastasis and Resistance Laboratory, University of Basel, 4001 Basel, Switzerland
| | - Michele Orditura
- Division of Medical Oncology, Department of Precision Medicine, University of Campania Luigi Vanvitelli, 80131 Naples, Italy
| | - Mario Scartozzi
- Medical Oncology Department, University of Cagliari, 09042 Cagliari, Italy
| | - Antonino Musolino
- Medical Oncology and Breast Unit, University Hospital of Parma, 43126 Parma, Italy
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy
- GOIRC (Gruppo Oncologico Italiano di Ricerca Clinica), 43126 Parma, Italy
| | - Cinzia Solinas
- Medical Oncology Department, University of Cagliari, 09042 Cagliari, Italy
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8
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Johnson RP, Ratnacaram CK, Kumar L, Jose J. Combinatorial approaches of nanotherapeutics for inflammatory pathway targeted therapy of prostate cancer. Drug Resist Updat 2022; 64:100865. [PMID: 36099796 DOI: 10.1016/j.drup.2022.100865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 08/27/2022] [Accepted: 08/30/2022] [Indexed: 12/24/2022]
Abstract
Prostate cancer (PC) is the most prevalent male urogenital cancer worldwide. PC patients presenting an advanced or metastatic cancer succumb to the disease, even after therapeutic interventions including radiotherapy, surgery, androgen deprivation therapy (ADT), and chemotherapy. One of the hallmarks of PC is evading immune surveillance and chronic inflammation, which is a major challenge towards designing effective therapeutic formulations against PC. Chronic inflammation in PC is often characterized by tumor microenvironment alterations, epithelial-mesenchymal transition and extracellular matrix modifications. The inflammatory events are modulated by reactive nitrogen and oxygen species, inflammatory cytokines and chemokines. Major signaling pathways in PC includes androgen receptor, PI3K and NF-κB pathways and targeting these inter-linked pathways poses a major therapeutic challenge. Notably, many conventional treatments are clinically unsuccessful, due to lack of targetability and poor bioavailability of the therapeutics, untoward toxicity and multidrug resistance. The past decade witnessed an advancement of nanotechnology as an excellent therapeutic paradigm for PC therapy. Modern nanovectorization strategies such as stimuli-responsive and active PC targeting carriers offer controlled release patterns and superior anti-cancer effects. The current review initially describes the classification, inflammatory triggers and major inflammatory pathways of PC, various PC treatment strategies and their limitations. Subsequently, recent advancement in combinatorial nanotherapeutic approaches, which target PC inflammatory pathways, and the mechanism of action are discussed. Besides, the current clinical status and prospects of PC homing nanovectorization, and major challenges to be addressed towards the advancement PC therapy are also addressed.
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Affiliation(s)
- Renjith P Johnson
- Polymer Nanobiomaterial Research Laboratory, Nanoscience and Microfluidics Division, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, Karnataka 575018, India
| | - Chandrahas Koumar Ratnacaram
- Cell Signaling and Cancer Biology Division, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, Karnataka 575018, India
| | - Lalit Kumar
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Udupi, Karnataka 576 104, India
| | - Jobin Jose
- NITTE Deemed-to-be University, NGSM Institute of Pharmaceutical Sciences, Department of Pharmaceutics, Mangalore 575018, India.
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miR-218-5p/RUNX2 Axis Positively Regulates Proliferation and Is Associated with Poor Prognosis in Cervical Cancer. Int J Mol Sci 2022; 23:ijms23136993. [PMID: 35805994 PMCID: PMC9267020 DOI: 10.3390/ijms23136993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/10/2022] [Accepted: 06/21/2022] [Indexed: 12/13/2022] Open
Abstract
The overexpression of miR-218-5p in cervical cancer (CC) cell lines decreases migration, invasion and proliferation. The objective was to identify target genes of miR-218-5p and the signaling pathways and cellular processes that they regulate. The relationship between the expression of miR-218-5p and RUNX2 and overall survival in CC as well as the effect of the exogenous overexpression of miR-218-5p on the level of RUNX2 were analyzed. The target gene prediction of miR-218-5p was performed in TargetScan, miRTarBase and miRDB. Predicted target genes were subjected to gene ontology (GO) and pathway enrichment analysis using the Kyoto Encyclopaedia of Genes and Genomes (KEGG). The miR-218-5p mimetic was transfected into C-33A and CaSki cells, and the miR-218-5p and RUNX2 levels were determined by RT–qPCR. Of the 118 predicted targets for miR-218-5p, 86 are involved in protein binding, and 10, including RUNX2, are involved in the upregulation of proliferation. Low miR-218-5p expression and a high level of RUNX2 are related to poor prognosis in CC. miR-218-5p overexpression is related to decreased RUNX2 expression in C-33A and CaSki cells. miR-218-5p may regulate RUNX2, and both molecules may be prognostic markers in CC.
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Fetoni AR, Paciello F, Troiani D. Cisplatin Chemotherapy and Cochlear Damage: Otoprotective and Chemosensitization Properties of Polyphenols. Antioxid Redox Signal 2022; 36:1229-1245. [PMID: 34731023 DOI: 10.1089/ars.2021.0183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Significance: Cisplatin is an important component of treatment regimens for different cancers. Notwithstanding that therapeutic success often results from partial efficacy or stabilizing the disease, chemotherapy failure is driven by resistance to drug treatment and occurrence of side effects, such as progressive irreversible ototoxicity. Cisplatin's side effects, including ototoxicity, are often dose limiting. Recent Advances: Cisplatin ototoxicity results from several mechanisms, including redox imbalance caused by reactive oxygen species production and lipid peroxidation, activation of inflammation, and p53 and its downstream pathways that culminate in apoptosis. Considerable efforts in research have targeted development of molecular interventions that can be concurrently administered with cisplatin or other chemotherapies to reduce side effect toxicities while preserving or enhancing the antineoplastic effects. Evidence from studies has indicated some polyphenols, such as curcumin, can help to regulate redox signaling and inflammatory effects. Furthermore, polyphenols can exert opposing effects in different types of tissues, that is, normal cells undergoing stressful conditions versus cancer cells. Critical Issues: This review article summarizes evidence of curcumin antioxidant effect against cisplatin-induced ototoxicity that is converted to a pro-oxidant activity in cisplatin-treated cancer cells, thus providing an ideal chemosensitivity combined with otoprotection. Polyphenols can modulate the adaptive responses to stress in the cisplatin-exposed cochlea. These adaptive effects can result from the interaction/cross talk between the cell's defenses, inflammatory molecules, and the key signaling molecules of signal transducers and activators of transcription 3 (STAT-3), nuclear factor κ-B (NF-κB), p53, and nuclear factor erythroid 2-related factor 2 (Nrf-2). Future Directions: We provide molecular evidence for alternative strategies for chemotherapy with cisplatin addressing the otoprotection and chemosensitization properties of polyphenols. Antioxid. Redox Signal. 36, 1229-1245.
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Affiliation(s)
- Anna Rita Fetoni
- Department of Head and Neck Surgery, Università Cattolica Del Sacro Cuore, Rome, Italy.,Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Fabiola Paciello
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy.,Department of Neuroscience, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Diana Troiani
- Department of Neuroscience, Università Cattolica del Sacro Cuore, Rome, Italy
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Koltai T, Reshkin SJ, Carvalho TMA, Di Molfetta D, Greco MR, Alfarouk KO, Cardone RA. Resistance to Gemcitabine in Pancreatic Ductal Adenocarcinoma: A Physiopathologic and Pharmacologic Review. Cancers (Basel) 2022; 14:2486. [PMID: 35626089 PMCID: PMC9139729 DOI: 10.3390/cancers14102486] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/11/2022] [Accepted: 05/13/2022] [Indexed: 12/13/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a very aggressive tumor with a poor prognosis and inadequate response to treatment. Many factors contribute to this therapeutic failure: lack of symptoms until the tumor reaches an advanced stage, leading to late diagnosis; early lymphatic and hematic spread; advanced age of patients; important development of a pro-tumoral and hyperfibrotic stroma; high genetic and metabolic heterogeneity; poor vascular supply; a highly acidic matrix; extreme hypoxia; and early development of resistance to the available therapeutic options. In most cases, the disease is silent for a long time, andwhen it does become symptomatic, it is too late for ablative surgery; this is one of the major reasons explaining the short survival associated with the disease. Even when surgery is possible, relapsesare frequent, andthe causes of this devastating picture are the low efficacy ofand early resistance to all known chemotherapeutic treatments. Thus, it is imperative to analyze the roots of this resistance in order to improve the benefits of therapy. PDAC chemoresistance is the final product of different, but to some extent, interconnected factors. Surgery, being the most adequate treatment for pancreatic cancer and the only one that in a few selected cases can achieve longer survival, is only possible in less than 20% of patients. Thus, the treatment burden relies on chemotherapy in mostcases. While the FOLFIRINOX scheme has a slightly longer overall survival, it also produces many more adverse eventsso that gemcitabine is still considered the first choice for treatment, especially in combination with other compounds/agents. This review discusses the multiple causes of gemcitabine resistance in PDAC.
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Affiliation(s)
| | - Stephan Joel Reshkin
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, 70126 Bari, Italy; (T.M.A.C.); (D.D.M.); (M.R.G.); (R.A.C.)
| | - Tiago M. A. Carvalho
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, 70126 Bari, Italy; (T.M.A.C.); (D.D.M.); (M.R.G.); (R.A.C.)
| | - Daria Di Molfetta
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, 70126 Bari, Italy; (T.M.A.C.); (D.D.M.); (M.R.G.); (R.A.C.)
| | - Maria Raffaella Greco
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, 70126 Bari, Italy; (T.M.A.C.); (D.D.M.); (M.R.G.); (R.A.C.)
| | - Khalid Omer Alfarouk
- Zamzam Research Center, Zamzam University College, Khartoum 11123, Sudan;
- Alfarouk Biomedical Research LLC, Temple Terrace, FL 33617, USA
| | - Rosa Angela Cardone
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, 70126 Bari, Italy; (T.M.A.C.); (D.D.M.); (M.R.G.); (R.A.C.)
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12
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Kang J, La Manna F, Bonollo F, Sampson N, Alberts IL, Mingels C, Afshar-Oromieh A, Thalmann GN, Karkampouna S. Tumor microenvironment mechanisms and bone metastatic disease progression of prostate cancer. Cancer Lett 2022; 530:156-169. [PMID: 35051532 DOI: 10.1016/j.canlet.2022.01.015] [Citation(s) in RCA: 51] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 01/02/2022] [Accepted: 01/13/2022] [Indexed: 12/14/2022]
Abstract
During disease progression from primary towards metastatic prostate cancer (PCa), and in particular bone metastases, the tumor microenvironment (TME) evolves in parallel with the cancer clones, altering extracellular matrix composition (ECM), vasculature architecture, and recruiting specialized tumor-supporting cells that favor tumor spread and colonization at distant sites. We introduce the clinical profile of advanced metastatic PCa in terms of common genetic alterations. Findings from recently developed models of PCa metastatic spread are discussed, focusing mainly on the role of the TME (mainly matrix and fibroblast cell types), at distinct stages: premetastatic niche orchestrated by the primary tumor towards the metastatic site and bone metastasis. We report evidence of premetastatic niche formation, such as the mechanisms of distant site conditioning by extracellular vesicles, chemokines and other tumor-derived mechanisms, including altered cancer cell-ECM interactions. Furthermore, evidence supporting the similarities of stroma alterations among the primary PCa and bone metastasis, and contribution of TME to androgen deprivation therapy resistance are also discussed. We summarize the available bone metastasis transgenic mouse models of PCa from a perspective of pro-metastatic TME alterations during disease progression and give an update on the current diagnostic and therapeutic radiological strategies for bone metastasis clinical management.
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Affiliation(s)
- Juening Kang
- Department for BioMedical Research, Urology Research Laboratory, University of Bern, Bern, Switzerland
| | - Federico La Manna
- Department for BioMedical Research, Urology Research Laboratory, University of Bern, Bern, Switzerland
| | - Francesco Bonollo
- Department for BioMedical Research, Urology Research Laboratory, University of Bern, Bern, Switzerland
| | - Natalie Sampson
- Department of Urology, Medical University of Innsbruck, Innsbruck, Austria
| | - Ian L Alberts
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Clemens Mingels
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Ali Afshar-Oromieh
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - George N Thalmann
- Department for BioMedical Research, Urology Research Laboratory, University of Bern, Bern, Switzerland; Department of Urology, Inselspital, Bern University Hospital, Bern, Switzerland
| | - Sofia Karkampouna
- Department for BioMedical Research, Urology Research Laboratory, University of Bern, Bern, Switzerland.
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13
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La Civita E, Liotti A, Cennamo M, Crocetto F, Ferro M, Liguoro P, Cimmino A, Imbimbo C, Beguinot F, Formisano P, Terracciano D. Peri-Prostatic Adipocyte-Released TGFβ Enhances Prostate Cancer Cell Motility by Upregulation of Connective Tissue Growth Factor. Biomedicines 2021; 9:biomedicines9111692. [PMID: 34829922 PMCID: PMC8615771 DOI: 10.3390/biomedicines9111692] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/09/2021] [Accepted: 11/12/2021] [Indexed: 12/14/2022] Open
Abstract
Periprostatic adipose tissue (PPAT) has emerged as a key player in the prostate cancer (PCa) microenvironment. In this study, we evaluated the ability of PPAT to promote PCa cell migration, as well as the molecular mechanisms involved. METHODS We collected conditioned mediums from in vitro differentiated adipocytes isolated from PPAT taken from PCa patients during radical prostatectomy. Migration was studied by scratch assay. RESULTS Culture with CM of human PPAT (AdipoCM) promotes migration in two different human androgen-independent (AI) PCa cell lines (DU145 and PC3) and upregulated the expression of CTGF. SB431542, a well-known TGFβ receptor inhibitor, counteracts the increased migration observed in presence of AdipoCM and decreased CTGF expression, suggesting that a paracrine secretion of TGFβ by PPAT affects motility of PCa cells. CONCLUSIONS Collectively, our study showed that factors secreted by PPAT enhanced migration through CTGF upregulation in AI PCa cell lines. These findings reveal the potential of novel therapeutic strategies targeting adipocyte-released factors and TGFβ/CTGF axis to fight advanced PCa dissemination.
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Affiliation(s)
- Evelina La Civita
- Department of Translational Medical Sciences, University of Naples “Federico II”, 80131 Naples, Italy; (E.L.C.); (A.L.); (M.C.); (P.L.); (F.B.)
| | - Antonietta Liotti
- Department of Translational Medical Sciences, University of Naples “Federico II”, 80131 Naples, Italy; (E.L.C.); (A.L.); (M.C.); (P.L.); (F.B.)
| | - Michele Cennamo
- Department of Translational Medical Sciences, University of Naples “Federico II”, 80131 Naples, Italy; (E.L.C.); (A.L.); (M.C.); (P.L.); (F.B.)
| | - Felice Crocetto
- Department of Neurosciences, Sciences of Reproduction and Odontostomatology, University of Naples “Federico II”, 80131 Naples, Italy; (F.C.); (C.I.)
| | - Matteo Ferro
- Division of Urology, European Institute of Oncology, 20141 Milan, Italy;
| | - Pasquale Liguoro
- Department of Translational Medical Sciences, University of Naples “Federico II”, 80131 Naples, Italy; (E.L.C.); (A.L.); (M.C.); (P.L.); (F.B.)
| | - Amelia Cimmino
- Institute of Genetics and Biophysic, National Research Council, 80131 Naples, Italy;
| | - Ciro Imbimbo
- Department of Neurosciences, Sciences of Reproduction and Odontostomatology, University of Naples “Federico II”, 80131 Naples, Italy; (F.C.); (C.I.)
| | - Francesco Beguinot
- Department of Translational Medical Sciences, University of Naples “Federico II”, 80131 Naples, Italy; (E.L.C.); (A.L.); (M.C.); (P.L.); (F.B.)
| | - Pietro Formisano
- Department of Translational Medical Sciences, University of Naples “Federico II”, 80131 Naples, Italy; (E.L.C.); (A.L.); (M.C.); (P.L.); (F.B.)
- Correspondence: (P.F.); (D.T.)
| | - Daniela Terracciano
- Department of Translational Medical Sciences, University of Naples “Federico II”, 80131 Naples, Italy; (E.L.C.); (A.L.); (M.C.); (P.L.); (F.B.)
- Correspondence: (P.F.); (D.T.)
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14
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Ayukawa S, Kamoshita N, Nakayama J, Teramoto R, Pishesha N, Ohba K, Sato N, Kozawa K, Abe H, Semba K, Goda N, Fujita Y, Maruyama T. Epithelial cells remove precancerous cells by cell competition via MHC class I-LILRB3 interaction. Nat Immunol 2021; 22:1391-1402. [PMID: 34686865 DOI: 10.1038/s41590-021-01045-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 09/13/2021] [Indexed: 02/04/2023]
Abstract
Epithelial cells have an ability termed 'cell competition', which is an immune surveillance-like function that extrudes precancerous cells from the epithelial layer, leading to apoptosis and clearance. However, it remains unclear how epithelial cells recognize and extrude transformed cells. Here, we discovered that a PirB family protein, leukocyte immunoglobulin-like receptor B3 (LILRB3), which is expressed on non-transformed epithelial cells, recognizes major histocompatibility complex class I (MHC class I) that is highly expressed on transformed cells. MHC class I interaction with LILRB3 expressed on normal epithelial cells triggers an SHP2-ROCK2 pathway that generates a mechanical force to extrude transformed cells. Removal of transformed cells occurs independently of natural killer (NK) cell or CD8+ cytotoxic T cell-mediated activity. This is a new mechanism in that the immunological ligand-receptor system generates a mechanical force in non-immune epithelial cells to extrude precancerous cells in the same epithelial layer.
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Affiliation(s)
- Shiyu Ayukawa
- Department of Life Science and Medical Bioscience, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Nagisa Kamoshita
- Waseda Institute for Advanced Study, Waseda University, Tokyo, Japan
| | - Jun Nakayama
- Department of Life Science and Medical Bioscience, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Ryohei Teramoto
- Department of Life Science and Medical Bioscience, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Novalia Pishesha
- Faculty of Arts and Sciences, Harvard University, Cambridge, MA, USA
| | - Kenji Ohba
- Division of Genetic Therapeutics, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| | - Nanami Sato
- Division of Molecular Oncology, Institute for Genetic Medicine, Hokkaido University Graduate School of Chemical Sciences and Engineering, Hokkaido, Japan
| | - Kei Kozawa
- Division of Molecular Oncology, Institute for Genetic Medicine, Hokkaido University Graduate School of Chemical Sciences and Engineering, Hokkaido, Japan
| | - Hikari Abe
- Department of Life Science and Medical Bioscience, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Kentaro Semba
- Department of Life Science and Medical Bioscience, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Nobuhito Goda
- Department of Life Science and Medical Bioscience, School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Yasuyuki Fujita
- Division of Molecular Oncology, Institute for Genetic Medicine, Hokkaido University Graduate School of Chemical Sciences and Engineering, Hokkaido, Japan.,Department of Molecular Oncology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Takeshi Maruyama
- Waseda Institute for Advanced Study, Waseda University, Tokyo, Japan.
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15
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Aljohani H, Senbanjo LT, Al Qranei M, Stains JP, Chellaiah MA. Methylsulfonylmethane Increases the Alveolar Bone Density of Mandibles in Aging Female Mice. Front Physiol 2021; 12:708905. [PMID: 34671266 PMCID: PMC8521043 DOI: 10.3389/fphys.2021.708905] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 09/06/2021] [Indexed: 11/13/2022] Open
Abstract
Methylsulfonylmethane (MSM) is a naturally occurring anti-inflammatory compound that effectively treats multiple degenerative diseases such as osteoarthritis and acute pancreatitis. Our previous studies have demonstrated the ability of MSM to differentiate stem cells from human exfoliated deciduous (SHED) teeth into osteoblast-like cells. This study examined the systemic effect of MSM in 36-week-old aging C57BL/6 female mice in vivo by injecting MSM for 13 weeks. Serum analyses showed an increase in expression levels of bone formation markers [osteocalcin (OCN) and procollagen type 1 intact N-terminal propeptide (P1NP)] and a reduction in bone resorption markers [tartrate-resistant acid phosphatase (TRAP) and C-terminal telopeptide of type I collag (CTX-I)] in MSM-injected animals. Micro-computed tomographic images demonstrated an increase in trabecular bone density in mandibles. The trabecular bone density tended to be higher in the femur, although the increase was not significantly different between the MSM- and phosphate-buffered saline (PBS)-injected mice. In mandibles, an increase in bone density with a corresponding decrease in the marrow cavity was observed in the MSM-injected mice. Furthermore, immunohistochemical analyses of the mandibles for the osteoblast-specific marker - OCN, and the mesenchymal stem cell-specific marker - CD105 showed a significant increase and decrease in OCN and CD105 positive cells, respectively. Areas of bone loss were observed in the inter-radicular region of mandibles in control mice. However, this loss was considerably decreased due to stimulation of bone formation in response to MSM injection. In conclusion, our study has demonstrated the ability of MSM to induce osteoblast formation and function in vivo, resulting in increased bone formation in the mandible. Hence, the application of MSM and stem cells of interest may be the right combination in alveolar bone regeneration under periodontal or other related diseases that demonstrate bone loss.
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Affiliation(s)
- Hanan Aljohani
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, Baltimore, MD, United States.,Department of Oral Medicine and Diagnostics Sciences, School of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Linda T Senbanjo
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, Baltimore, MD, United States
| | - Mohammed Al Qranei
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, Baltimore, MD, United States.,Department of Preventive Dental Sciences, School of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Joseph P Stains
- Department of Orthopedics, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Meenakshi A Chellaiah
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, Baltimore, MD, United States
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16
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Fontanella RA, Sideri S, Di Stefano C, Catizone A, Di Agostino S, Angelini DF, Guerrera G, Battistini L, Battafarano G, Del Fattore A, Campese AF, Padula F, De Cesaris P, Filippini A, Riccioli A. CD44v8-10 is a marker for malignant traits and a potential driver of bone metastasis in a subpopulation of prostate cancer cells. Cancer Biol Med 2021; 18:j.issn.2095-3941.2020.0495. [PMID: 34018387 PMCID: PMC8330537 DOI: 10.20892/j.issn.2095-3941.2020.0495] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 03/08/2021] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE Bone metastasis is a clinically important outcome of prostate carcinoma (PC). We focused on the phenotypic and functional characterization of a particularly aggressive phenotype within the androgen-independent bone metastasis-derived PC3 cell line. These cells, originated from the spontaneous conversion of a CD44-negative subpopulation, stably express the CD44v8-10 isoform (CD44v8-10pos) and display stem cell-like features and a marked invasive phenotype in vitro that is lost upon CD44v8-10 silencing. METHODS Flow cytometry, enzyme-linked immunoassay, immunofluorescence, and Western blot were used for phenotypic and immunologic characterization. Real-time quantitative polymerase chain reaction and functional assays were used to assess osteomimicry. RESULTS Analysis of epithelial-mesenchymal transition markers showed that CD44v8-10pos PC3 cells surprisingly display epithelial phenotype and can undergo osteomimicry, acquiring bone cell phenotypic and behavioral traits. Use of specific siRNA evidenced the ability of CD44v8-10 variant to confer osteomimetic features, hence the potential to form bone-specific metastasis. Moreover, the ability of tumors to activate immunosuppressive mechanisms which counteract effective immune responses is a sign of the aggressiveness of a tumor. Here we report that CD44v8-10pos cells express programmed death ligand 1, a negative regulator of anticancer immunity, and secrete exceptionally high amounts of interleukin-6, favoring osteoclastogenesis and immunosuppression in bone microenvironment. Notably, we identified a novel pathway activated by CD44v8-10, involving tafazzin (TAZ) and likely the Wnt/TAZ axis, known to play a role in upregulating osteomimetic genes. CONCLUSIONS CD44v8-10 could represent a marker of a more aggressive bone metastatic PC population exerting a driver role in osteomimicry in bone. A novel link between TAZ and CD44v8-10 is also shown.
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Affiliation(s)
- Rosaria A. Fontanella
- Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Unit of Histology and Medical Embryology, Sapienza University, Rome 00161, Italy
| | - Silvia Sideri
- Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Unit of Histology and Medical Embryology, Sapienza University, Rome 00161, Italy
| | - Chiara Di Stefano
- Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Unit of Histology and Medical Embryology, Sapienza University, Rome 00161, Italy
| | - Angiolina Catizone
- Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Unit of Histology and Medical Embryology, Sapienza University, Rome 00161, Italy
| | - Silvia Di Agostino
- Department of Health Sciences School of Medicine – “Magna Graecia” University of Catanzaro, Catanzaro 88100, Italy
| | | | | | | | - Giulia Battafarano
- Bone Physiopathology Research Unit, Genetics and Rare Diseases Research Division, Bambino Gesù Children’s Hospital, IRCCS, Rome 00146, Italy
| | - Andrea Del Fattore
- Bone Physiopathology Research Unit, Genetics and Rare Diseases Research Division, Bambino Gesù Children’s Hospital, IRCCS, Rome 00146, Italy
| | | | - Fabrizio Padula
- Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Unit of Histology and Medical Embryology, Sapienza University, Rome 00161, Italy
| | - Paola De Cesaris
- Department of Life, Health and Environmental Sciences, University of L’Aquila, L’Aquila 67100, Italy
| | - Antonio Filippini
- Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Unit of Histology and Medical Embryology, Sapienza University, Rome 00161, Italy
| | - Anna Riccioli
- Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Unit of Histology and Medical Embryology, Sapienza University, Rome 00161, Italy
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17
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Koltai T, Reshkin SJ, Carvalho TMA, Cardone RA. Targeting the Stromal Pro-Tumoral Hyaluronan-CD44 Pathway in Pancreatic Cancer. Int J Mol Sci 2021; 22:3953. [PMID: 33921242 PMCID: PMC8069142 DOI: 10.3390/ijms22083953] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/01/2021] [Accepted: 04/08/2021] [Indexed: 02/07/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is one of the deadliest malignancies. Present-day treatments have not shown real improvements in reducing the high mortality rate and the short survival of the disease. The average survival is less than 5% after 5 years. New innovative treatments are necessary to curtail the situation. The very dense pancreatic cancer stroma is a barrier that impedes the access of chemotherapeutic drugs and at the same time establishes a pro-proliferative symbiosis with the tumor, thus targeting the stroma has been suggested by many authors. No ideal drug or drug combination for this targeting has been found as yet. With this goal in mind, here we have explored a different complementary treatment based on abundant previous publications on repurposed drugs. The cell surface protein CD44 is the main receptor for hyaluronan binding. Many malignant tumors show over-expression/over-activity of both. This is particularly significant in pancreatic cancer. The independent inhibition of hyaluronan-producing cells, hyaluronan synthesis, and/or CD44 expression, has been found to decrease the tumor cell's proliferation, motility, invasion, and metastatic abilities. Targeting the hyaluronan-CD44 pathway seems to have been bypassed by conventional mainstream oncological practice. There are existing drugs that decrease the activity/expression of hyaluronan and CD44: 4-methylumbelliferone and bromelain respectively. Some drugs inhibit hyaluronan-producing cells such as pirfenidone. The association of these three drugs has never been tested either in the laboratory or in the clinical setting. We present a hypothesis, sustained by hard experimental evidence, suggesting that the simultaneous use of these nontoxic drugs can achieve synergistic or added effects in reducing invasion and metastatic potential, in PDAC. A non-toxic, low-cost scheme for inhibiting this pathway may offer an additional weapon for treating pancreatic cancer.
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Affiliation(s)
| | - Stephan Joel Reshkin
- Department of Bioscience, Biotechnology and Biopharmaceutics, University of Bari, 70126 Bari, Italy; (T.M.A.C.); (R.A.C.)
| | - Tiago M. A. Carvalho
- Department of Bioscience, Biotechnology and Biopharmaceutics, University of Bari, 70126 Bari, Italy; (T.M.A.C.); (R.A.C.)
| | - Rosa A. Cardone
- Department of Bioscience, Biotechnology and Biopharmaceutics, University of Bari, 70126 Bari, Italy; (T.M.A.C.); (R.A.C.)
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18
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Li Y, Ge C, Franceschi RT. Role of Runx2 in prostate development and stem cell function. Prostate 2021; 81:231-241. [PMID: 33411419 PMCID: PMC7856111 DOI: 10.1002/pros.24099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 12/18/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND RUNX2, a critical transcription factor in bone development, is also expressed in prostate and breast where it has been linked to cancer progression and cancer stem cells. However, its role in normal prostate biology has not been previously examined. METHODS Selective growth of murine prostate epithelium under non-adherent conditions was used to enrich for stem cells. Expression of runt domain transcription factors, stem cell and prostate marker messenger RNAs (mRNAs) was determined by quantitative reverse transcription polymerase chain reaction. Effects of Runx2 loss and gain-of-function on prostate epithelial cells were assessed using cells isolated from Runx2loxp/loxp mice transduced with Adeno-Cre or by Adeno-Runx2 transduction of wild type cells. Cellular distribution of RUNX2 and prostate-associated proteins was assessed using immunofluorescence microscopy. In vivo Runx2 knock out was achieved by tamoxifen treatment of Nkx3.1CreERT; Runx2loxp/loxp mice. RESULTS Prostate epithelium-derived spheroids, which are enriched in stem cells, were shown to contain elevated levels of Runx2 mRNA. Spheroid formation required Runx2 since adenovirus-Cre mediated knockout of Runx2 in prostatic epithelial cells from Runx2loxp/loxp mice severely reduced spheroid formation and stem cell markers while Runx2 overexpression was stimulatory. In vivo, Runx2 was detected during early prostate development (E16.5) and in adult mice where it was present in basal and luminal cells of ventral and anterior lobes. Prostate-selective deletion of Runx2 in tamoxifen-treated Nkx3.1CreERT; Runx2loxp/loxp mice severely inhibited growth and maturation of tubules in the anterior prostate and reduced expression of stem cell markers and prostate-associated genes. CONCLUSION This study demonstrates an important role for Runx2 in prostate development that may be explained by actions in prostate epithelial stem cells.
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Affiliation(s)
- Yan Li
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI
| | - Chunxi Ge
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI
| | - Renny T. Franceschi
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI
- Department of Biological Chemistry, University of Michigan School of Medicine, Ann Arbor, MI
- Department of Biomedical Engineering, University of Michigan School of Engineering, Ann Arbor, MI
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19
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Senbanjo LT, AlJohani H, AlQranei M, Majumdar S, Ma T, Chellaiah MA. Identification of sequence-specific interactions of the CD44-intracellular domain with RUNX2 in the transcription of matrix metalloprotease-9 in human prostate cancer cells. CANCER DRUG RESISTANCE (ALHAMBRA, CALIF.) 2020; 3:586-602. [PMID: 33062960 PMCID: PMC7556329 DOI: 10.20517/cdr.2020.21] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Aim The Cluster of differentiation 44 (CD44) transmembrane protein is cleaved by γ-secretase, the inhibition of which blocks CD44 cleavage. This study aimed to determine the biological consequence of CD44 cleavage and its potential interaction with Runt-related transcription factor (RUNX2) in a sequence-specific manner in PC3 prostate cancer cells. Methods Using full-length and C-terminal deletion constructs of CD44-ICD (D1-D5) expressed as stable green fluorescent protein-fusion proteins in PC3 cells, we located possible RUNX2-binding sequences. Results Chromatin immunoprecipitation assays demonstrated that the C-terminal amino acid residues between amino acids 671 and 706 in D1 to D3 constructs were indispensable for sequence-specific binding of RUNX2. This binding was minimal for sequences in the D4 and D5 constructs. Correspondingly, an increase in matrix metalloprotease-9 (MMP-9) expression was observed at the mRNA and protein levels in PC3 cells stably expressing D1-D3 constructs. Conclusion These results provide biochemical evidence for the possible sequence-specific CD44-ICD/RUNX2 interaction and its functional relationship to MMP-9 transcription in the promoter region.
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Affiliation(s)
- Linda T Senbanjo
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Hanan AlJohani
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Mohammed AlQranei
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Sunipa Majumdar
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Tao Ma
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Meenakshi A Chellaiah
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
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20
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Tang L, Xu M, Zhang L, Qu L, Liu X. Role of αVβ3 in Prostate Cancer: Metastasis Initiator and Important Therapeutic Target. Onco Targets Ther 2020; 13:7411-7422. [PMID: 32801764 PMCID: PMC7395689 DOI: 10.2147/ott.s258252] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/19/2020] [Indexed: 12/14/2022] Open
Abstract
In prostate cancer, distant organ metastasis is the leading cause of patient death. Although the mechanism of malignant tumor metastasis is unclear, studies have confirmed that integrin αVβ3 plays an important role in this process. In prostate cancer, αVβ3 mediates adhesion, invasion, immune escape and neovascularization through interactions with different ligands. Among these ligands and in addition to proteins that are directly related to tumor invasion, other proteins that contain the RGD structure could also bind to αVβ3 and cause a number of biological effects. In this article, we summarized the ligand and downstream proteins related to αVβ3-mediated prostate cancer metastasis as well as some diagnostic and therapeutic measures targeting αVβ3.
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Affiliation(s)
- Lin Tang
- College of Mathematics and Computer Science, Chifeng University, Chifeng, The Inner Mongol Autonomous Region 024005, People's Republic of China
| | - Meng Xu
- Department of Urology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, People's Republic of China.,R&D Department, Seekgene Technology Co., Ltd, Beijing 100000, People's Republic of China
| | - Long Zhang
- Department of Hepatobiliary Surgery, Yidu Central Hospital, Weifang, Shandong 262500, People's Republic of China
| | - Lin Qu
- Department of Orthopaedic Surgery, Anshan Hospital of the First Hospital of China Medical University, Anshan, Liaoning 114000, People's Republic of China
| | - Xiaoyan Liu
- Department of Pathology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing 100000, People's Republic of China
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21
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Park W, Cho S, Kang D, Han JH, Park JH, Lee B, Lee J, Kim DH. Tumor Microenvironment Targeting Nano-Bio Emulsion for Synergistic Combinational X-Ray PDT with Oncolytic Bacteria Therapy. Adv Healthc Mater 2020; 9:e1901812. [PMID: 32529747 PMCID: PMC7523430 DOI: 10.1002/adhm.201901812] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 05/16/2020] [Indexed: 11/08/2022]
Abstract
Various cancer therapies have been developed, but tumor recurrence with incomplete tumor killing and remaining tumor cells/tissues is frequent in monotherapies. Herein, a nano-bio therapeutic emulsion formulated with multifunctional nanoscintillators and anaerobic Clostridium novyi-NT spores for synergistic image-guided combinational cancer therapy is reported. MRI visible nanoscintillators (NSs) are synthesized with a NaGdF4 :Tb,Ce@NaGdF4 core/shell structure for an image-guided X-ray photodynamic therapy (PDT) of the normoxic peripheral tumor. An anaerobic oncolytic bacterium (C. novyi-NT) therapy is combined to treat the hypoxic central tumor tissues. Photosensitizer-coated NSs (PS-NSs) and C. novyi-NT spores are emulsified with clinically available ethiodized oil (Lipiodol) to be the nano-bio therapeutic emulsion and injected into the tumor with computed tomography image guidance. The distribution of nano-bio therapeutic emulsion, including PS-NSs and anaerobic C. novyi-NT spores in the tumor site, is confirmed by both X-ray and T1 -weighted magnetic resonance imaging. Following the image-guided X-ray PDT and anaerobic C. novyi- NT combination treatment, apoptotic cell death in cancer tissues, including both peripheral and central tumor regions, is significantly higher than in the control groups. This combination therapy approach using a nano-bio therapeutic emulsion is expected to overcome the limitations of conventional cancer therapy, resulting in increased cancer-therapeutic efficacy.
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Affiliation(s)
- Wooram Park
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
- Department of Biomedical-Chemical Engineering, The Catholic University of Korea, 43 Jibong-ro, Bucheon-si, Gyeonggi 14662, Republic of Korea
| | - Soojeong Cho
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Dongkyu Kang
- Molecular Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Jun-Hyeok Han
- Department of Biomedical-Chemical Engineering, The Catholic University of Korea, 43 Jibong-ro, Bucheon-si, Gyeonggi 14662, Republic of Korea
| | - Jung-Hoon Park
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Byeongdu Lee
- X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Joonseok Lee
- Molecular Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Department of HY-KIST Bio-convergence, Hanyang University, Seoul 04763, Republic of Korea
| | - Dong-Hyun Kim
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
- Robert H. Lurie Comprehensive Cancer Center, Chicago, IL 60611, USA
- Department of Biomedical Engineering, McCormick School of Engineering, Evanston, IL 60208, USA
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22
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Davis PJ, Mousa SA, Lin HY. Nongenomic Actions of Thyroid Hormone: The Integrin Component. Physiol Rev 2020; 101:319-352. [PMID: 32584192 DOI: 10.1152/physrev.00038.2019] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The extracellular domain of plasma membrane integrin αvβ3 contains a cell surface receptor for thyroid hormone analogues. The receptor is largely expressed and activated in tumor cells and rapidly dividing endothelial cells. The principal ligand for this receptor is l-thyroxine (T4), usually regarded only as a prohormone for 3,5,3'-triiodo-l-thyronine (T3), the hormone analogue that expresses thyroid hormone in the cell nucleus via nuclear receptors that are unrelated structurally to integrin αvβ3. At the integrin receptor for thyroid hormone, T4 regulates cancer and endothelial cell division, tumor cell defense pathways (such as anti-apoptosis), and angiogenesis and supports metastasis, radioresistance, and chemoresistance. The molecular mechanisms involve signal transduction via mitogen-activated protein kinase and phosphatidylinositol 3-kinase, differential expression of multiple genes related to the listed cell processes, and regulation of activities of other cell surface proteins, such as vascular growth factor receptors. Tetraiodothyroacetic acid (tetrac) is derived from T4 and competes with binding of T4 to the integrin. In the absence of T4, tetrac and chemically modified tetrac also have anticancer effects that culminate in altered gene transcription. Tumor xenografts are arrested by unmodified and chemically modified tetrac. The receptor requires further characterization in terms of contributions to nonmalignant cells, such as platelets and phagocytes. The integrin αvβ3 receptor for thyroid hormone offers a large panel of cellular actions that are relevant to cancer biology and that may be regulated by tetrac derivatives.
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Affiliation(s)
- Paul J Davis
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York; Department of Medicine, Albany Medical College, Albany, New York; Ph.D. Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan; Taipei Cancer Center, Taipei Medical University, Taipei, Taiwan; and Traditional Herbal Medicine Research Center of Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
| | - Shaker A Mousa
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York; Department of Medicine, Albany Medical College, Albany, New York; Ph.D. Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan; Taipei Cancer Center, Taipei Medical University, Taipei, Taiwan; and Traditional Herbal Medicine Research Center of Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
| | - Hung-Yun Lin
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York; Department of Medicine, Albany Medical College, Albany, New York; Ph.D. Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan; Taipei Cancer Center, Taipei Medical University, Taipei, Taiwan; and Traditional Herbal Medicine Research Center of Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
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23
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Elshafae SM, Dirksen WP, Alasonyalilar-Demirer A, Breitbach J, Yuan S, Kantake N, Supsavhad W, Hassan BB, Attia Z, Rosol TJ. Canine prostatic cancer cell line (LuMa) with osteoblastic bone metastasis. Prostate 2020; 80:698-714. [PMID: 32348616 PMCID: PMC7291846 DOI: 10.1002/pros.23983] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/28/2020] [Accepted: 04/02/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Osteoblastic bone metastasis represents the most common complication in men with prostate cancer (PCa). During progression and bone metastasis, PCa cells acquire properties similar to bone cells in a phenomenon called osteomimicry, which promotes their ability to metastasize, proliferate, and survive in the bone microenvironment. The mechanism of osteomimicry resulting in osteoblastic bone metastasis is unclear. METHODS We developed and characterized a novel canine prostatic cancer cell line (LuMa) that will be useful to investigate the relationship between osteoblastic bone metastasis and osteomimicry in PCa. The LuMa cell line was established from a primary prostate carcinoma of a 13-year old mixed breed castrated male dog. Cell proliferation and gene expression of LuMa were measured and compared to three other canine prostatic cancer cell lines (Probasco, Ace-1, and Leo) in vitro. The effect of LuMa cells on calvaria and murine preosteoblastic (MC3T3-E1) cells was measured by quantitative reverse-transcription polymerase chain reaction and alkaline phosphatase assay. LuMa cells were transduced with luciferase for monitoring in vivo tumor growth and metastasis using different inoculation routes (subcutaneous, intratibial [IT], and intracardiac [IC]). Xenograft tumors and metastases were evaluated using radiography and histopathology. RESULTS After left ventricular injection, LuMa cells metastasized to bone, brain, and adrenal glands. IT injections induced tumors with intramedullary new bone formation. LuMa cells had the highest messenger RNA levels of osteomimicry genes (RUNX2, RANKL, and Osteopontin [OPN]), CD44, E-cadherin, and MYOF compared to Ace-1, Probasco, and Leo cells. LuMa cells induced growth in calvaria defects and modulated gene expression in MC3T3-E1 cells. CONCLUSIONS LuMa is a novel canine PCa cell line with osteomimicry and stemness properties. LuMa cells induced osteoblastic bone formation in vitro and in vivo. LuMa PCa cells will serve as an excellent model for studying the mechanisms of osteomimicry and osteoblastic bone and brain metastasis in prostate cancer.
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Affiliation(s)
- Said M. Elshafae
- Dept. of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
- Dept. of Pathology, Faculty of Veterinary medicine, Benha University, Benha, Egypt
- Dept. of Neuroscience and Pharmacology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Wessel P. Dirksen
- Dept. of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
- Dept. of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Aylin Alasonyalilar-Demirer
- Dept. of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
- Department of Pathology, Faculty of Veterinary Medicine, Bursa Uludag University, Turkey
| | - Justin Breitbach
- Dept. of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Shiyu Yuan
- Dept. of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH, USA
| | - Noriko Kantake
- Dept. of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH, USA
| | - Wachiraphan Supsavhad
- Dept. of Pathology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Bardes B. Hassan
- Dept. of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
- Dept. of Pathology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Zayed Attia
- Dept. of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
- Dept. of Animal Medicine and Infectious Diseases, Faculty of Veterinary Medicine, Sadat City University, Sadat City, Egypt
| | - Thomas J. Rosol
- Dept. of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH, USA
- Correspondence to: Dr. Thomas Rosol, Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, 225 Irvine Hall, Athens, OH 45701, USA. , Phone: 740.593.2405
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24
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Lin SR, Mokgautsi N, Liu YN. Ras and Wnt Interaction Contribute in Prostate Cancer Bone Metastasis. Molecules 2020; 25:E2380. [PMID: 32443915 PMCID: PMC7287876 DOI: 10.3390/molecules25102380] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 05/15/2020] [Accepted: 05/16/2020] [Indexed: 12/12/2022] Open
Abstract
Prostate cancer (PCa) is one of the most prevalent and malignant cancer types in men, which causes more than three-hundred thousand cancer death each year. At late stage of PCa progression, bone marrow is the most often metastatic site that constitutes almost 70% of metastatic cases of the PCa population. However, the characteristic for the osteo-philic property of PCa is still puzzling. Recent studies reported that the Wnt and Ras signaling pathways are pivotal in bone metastasis and that take parts in different cytological changes, but their crosstalk is not well studied. In this review, we focused on interactions between the Wnt and Ras signaling pathways during each stage of bone metastasis and present the fate of those interactions. This review contributes insights that can guide other researchers by unveiling more details with regard to bone metastasis and might also help in finding potential therapeutic regimens for preventing PCa bone metastasis.
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Affiliation(s)
- Shian-Ren Lin
- Graduate Institute of Cancer Biology and Drug Discovery, Collage of Medical Science and Technology, Taipei Medical University, Taipei 11024, Taiwan;
| | - Ntlotlang Mokgautsi
- Ph.D. Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 11024, Taiwan;
| | - Yen-Nien Liu
- Graduate Institute of Cancer Biology and Drug Discovery, Collage of Medical Science and Technology, Taipei Medical University, Taipei 11024, Taiwan;
- Ph.D. Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 11024, Taiwan;
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25
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A Potential Role of RUNX2- RUNT Domain in Modulating the Expression of Genes Involved in Bone Metastases: An In Vitro Study with Melanoma Cells. Cells 2020; 9:cells9030751. [PMID: 32204402 PMCID: PMC7140624 DOI: 10.3390/cells9030751] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/11/2020] [Accepted: 03/16/2020] [Indexed: 01/07/2023] Open
Abstract
Ectopic expression of RUNX2 has been reported in several tumors. In melanoma cells, the RUNT domain of RUNX2 increases cell proliferation and migration. Due to the strong link between RUNX2 and skeletal development, we hypothesized that the RUNT domain may be involved in the modulation of mechanisms associated with melanoma bone metastasis. Therefore, we evaluated the expression of metastatic targets in wild type (WT) and RUNT KO melanoma cells by array and real-time PCR analyses. Western blot, ELISA, immunofluorescence, migration and invasion ability assays were also performed. Our findings showed that the expression levels of bone sialoprotein (BSP) and osteopontin (SPP1) genes, which are involved in malignancy-induced hypercalcemia, were reduced in RUNT KO cells. In addition, released PTHrP levels were lower in RUNT KO cells than in WT cells. The RUNT domain also contributes to increased osteotropism and bone invasion in melanoma cells. Importantly, we found that the ERK/p-ERK and AKT/p-AKT pathways are involved in RUNT-promoted bone metastases. On the basis of our findings, we concluded that the RUNX2 RUNT domain is involved in the mechanisms promoting bone metastasis of melanoma cells via complex interactions between multiple players involved in bone remodeling.
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26
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AlQranei MS, Aljohani H, Majumdar S, Senbanjo LT, Chellaiah MA. C-phycocyanin attenuates RANKL-induced osteoclastogenesis and bone resorption in vitro through inhibiting ROS levels, NFATc1 and NF-κB activation. Sci Rep 2020; 10:2513. [PMID: 32054921 PMCID: PMC7018981 DOI: 10.1038/s41598-020-59363-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 01/28/2020] [Indexed: 12/13/2022] Open
Abstract
Excessive bone loss occurs in inflammatory disorders such as periodontitis and osteoporosis. The underlying mechanism is related to the differentiation of macrophages into multinucleated giant osteoclasts and their bone resorptive activity. C-Phycocyanin (C-PC) is a phycobiliprotein extracted from the blue-green algae, which has been shown to have various pharmacological effects. The role of C-PC on bone metabolism needs revelation. In this study, we determined the effectiveness of C-PC as an inhibitor of osteoclast differentiation, activity, and survival in vitro. We found that C-PC strongly inhibited the differentiation of macrophages to TRAP-positive osteoclasts, distinctive osteoclast specific podosomal organization, and dentine matrix resorption without any cytotoxicity. Also, it suppressed the expression of osteoclast specific markers, such as cathepsin K and integrin β3 at mRNA and protein levels. RANKL mediated signaling utilizes reactive oxygen species (ROS) for the differentiation of osteoclasts. C-PC attenuated RANKL stimulated ROS. Mechanistic studies indicate that C-PC has the potential to reduce osteoclast formation via blocking the degradation of cytosolic IκB-α and hence, the activation of downstream markers such as c-Fos and NFATc1. However, it does not have any effect on osteoblast-mediated bone formation in vitro. Collectively, our data suggest that C-PC may be utilized as a therapeutic agent that can target bone loss mediated by excessive osteoclastic bone resorption without affecting osteoblastic activity in bone.
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Affiliation(s)
- Mohammed S AlQranei
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, MD, USA
- Preventive Dental Sciences Department, School of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Hanan Aljohani
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, MD, USA
- Department of Oral Medicine and Diagnostics Sciences, King Saud University, School of Dentistry, Riyadh, Saudi Arabia
| | - Sunipa Majumdar
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, MD, USA
| | - Linda T Senbanjo
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, MD, USA
| | - Meenakshi A Chellaiah
- Department of Oncology and Diagnostic Sciences, School of Dentistry, University of Maryland, Baltimore, MD, USA.
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27
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Kim B, Kim H, Jung S, Moon A, Noh DY, Lee ZH, Kim HJ, Kim HH. A CTGF-RUNX2-RANKL Axis in Breast and Prostate Cancer Cells Promotes Tumor Progression in Bone. J Bone Miner Res 2020; 35:155-166. [PMID: 31505052 DOI: 10.1002/jbmr.3869] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 08/27/2019] [Accepted: 08/28/2019] [Indexed: 02/06/2023]
Abstract
Metastasis to bone is a frequent occurrence in patients with breast and prostate cancers and inevitably threatens the patient's quality of life and survival. Identification of cancer-derived mediators of bone metastasis and osteolysis may lead to novel therapeutic strategies. In this study, we established highly bone-metastatic PC3 prostate and MDA-MB-231 (MDA) breast cancer cell sublines by in vivo selection in mice. In bone-metastatic cancer cells, the expression and secretion of connective tissue growth factor (CTGF) were highly upregulated. CTGF knockdown in bone-metastatic cells decreased invasion activity and MMP expression. RUNX2 overexpression in the CTGF knockdown cells restored the invasion activity and MMP expression. In addition, CTGF increased RUNX2 protein stability by inducing its acetylation via p300 acetyl transferase. The integrin αvβ3 receptor mediated these effects of CTGF. Furthermore, CTGF promoted RUNX2 recruitment to the RANKL promoter, resulting in increased RANKL production from the tumor cells and subsequent stimulation of osteoclastogenesis from precursor cells. In addition, animal model with injection of CTGF knocked-down prostate cancer cells into 6-week old BALB/c male mice showed reduced osteolytic lesions. More importantly, the expression levels of CTGF and RANKL showed a strong positive correlation in human primary breast tumor tissues and were higher in bone metastases than in other site metastases. These findings indicate that CTGF plays crucial roles for osteolytic bone metastasis both by enhancing invasiveness of tumor cells and by producing RANKL for osteoclastogenesis. Targeting CTGF may lead to the development of effective preventive and therapeutic strategies for osteolytic metastasis. © 2019 American Society for Bone and Mineral Research.
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Affiliation(s)
- Bongjun Kim
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, School of Dentistry, Seoul, South Korea
| | - Haemin Kim
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, School of Dentistry, Seoul, South Korea.,Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery/Weill Cornell Medicine, New York, NY, USA
| | - Suhan Jung
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, School of Dentistry, Seoul, South Korea
| | - Aree Moon
- College of Pharmacy, Duksung Women's University, Seoul, South Korea
| | - Dong-Young Noh
- Department of Surgery and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, South Korea
| | - Zang Hee Lee
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, School of Dentistry, Seoul, South Korea
| | - Hyung Joon Kim
- Department of Oral Physiology, BK21 PLUS Project, and Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, South Korea
| | - Hong-Hee Kim
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, School of Dentistry, Seoul, South Korea
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28
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Bolf EL, Gillis NE, Barnum MS, Beaudet CM, Yu GY, Tomczak JA, Stein JL, Lian JB, Stein GS, Carr FE. The Thyroid Hormone Receptor-RUNX2 Axis: A Novel Tumor Suppressive Pathway in Breast Cancer. Discov Oncol 2019; 11:34-41. [PMID: 31865591 DOI: 10.1007/s12672-019-00373-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 11/25/2019] [Indexed: 01/07/2023] Open
Abstract
Metastatic breast cancer is refractory to conventional therapies and is an end-stage disease. RUNX2 is a transcription factor that becomes oncogenic when aberrantly expressed in multiple tumor types, including breast cancer, supporting tumor progression and metastases. Our previous work demonstrated that the thyroid hormone receptor beta (TRβ) inhibits RUNX2 expression and tumorigenic characteristics in thyroid cells. As TRβ is a tumor suppressor, we investigated the compelling question whether TRβ also regulates RUNX2 in breast cancer. The Cancer Genome Atlas indicates that TRβ expression is decreased in the most aggressive basal-like subtype of breast cancer. We established that modulated levels of TRβ results in corresponding changes in the high levels of RUNX2 expression in metastatic, basal-like breast cells. The MDA-MB-231 triple-negative breast cancer cell line exhibits low expression of TRβ and high levels of RUNX2. Increased expression of TRβ decreased RUNX2 levels. The thyroid hormone-mediated suppression of RUNX2 is TRβ specific as TRα overexpression failed to alter RUNX2 expression. Consistent with these findings, knockdown of TRβ in non-tumor MCF10A mammary epithelial-like cells results in an increase in RUNX2 and RUNX2 target genes. Mechanistically, TRβ directly interacts with the proximal promoter of RUNX2 through a thyroid hormone response element to reduce promoter activity. The TRβ suppression of the oncogene RUNX2 is a signaling pathway shared by thyroid and breast cancers. Our findings provide a novel mechanism for TRβ-mediated tumor suppression in breast cancers. This pathway may be common to many solid tumors and impact treatment for metastatic cancers.
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Affiliation(s)
- Eric L Bolf
- Department of Pharmacology, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA.,University of Vermont Cancer Center, Larner College of Medicine, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA
| | - Noelle E Gillis
- Department of Pharmacology, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA.,University of Vermont Cancer Center, Larner College of Medicine, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA
| | - Michael S Barnum
- Department of Pharmacology, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA
| | - Caitlin M Beaudet
- Department of Pharmacology, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA
| | - Grace Y Yu
- Department of Pharmacology, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA
| | - Jennifer A Tomczak
- Department of Pharmacology, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA
| | - Janet L Stein
- University of Vermont Cancer Center, Larner College of Medicine, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA.,Department of Biochemistry, University of Vermont, Burlington, VT, 05405, USA
| | - Jane B Lian
- University of Vermont Cancer Center, Larner College of Medicine, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA.,Department of Biochemistry, University of Vermont, Burlington, VT, 05405, USA
| | - Gary S Stein
- University of Vermont Cancer Center, Larner College of Medicine, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA.,Department of Biochemistry, University of Vermont, Burlington, VT, 05405, USA
| | - Frances E Carr
- Department of Pharmacology, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA. .,University of Vermont Cancer Center, Larner College of Medicine, University of Vermont, 89 Beaumont Avenue, Burlington, VT, 05405, USA.
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29
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Aljohani H, Senbanjo LT, Chellaiah MA. Methylsulfonylmethane increases osteogenesis and regulates the mineralization of the matrix by transglutaminase 2 in SHED cells. PLoS One 2019; 14:e0225598. [PMID: 31805069 PMCID: PMC6894810 DOI: 10.1371/journal.pone.0225598] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 11/07/2019] [Indexed: 01/09/2023] Open
Abstract
Methylsulfonylmethane (MSM) is a naturally occurring, sulfate-containing, organic compound. It has been shown to stimulate the differentiation of mesenchymal stem cells into osteoblast-like cells and bone formation. In this study, we investigated whether MSM influences the differentiation of stem cells from human exfoliated deciduous teeth (SHED) into osteoblast-like cells and their osteogenic potential. Here, we report that MSM induced osteogenic differentiation through the expression of osteogenic markers such as osterix, osteopontin, and RUNX2, at both mRNA and protein levels in SHED cells. An increase in the activity of alkaline phosphatase and mineralization confirmed the osteogenic potential of MSM. These MSM-induced effects were observed in cells grown in basal medium but not osteogenic medium. MSM induced transglutaminase-2 (TG2), which may be responsible for the cross-linking of extracellular matrix proteins (collagen or osteopontin), and the mineralization process. Inhibition of TG2 ensued a significant decrease in the differentiation of SHED cells and cross-linking of matrix proteins. A comparison of mineralization with the use of mineralized and demineralized bone particles in the presence of MSM revealed that mineralization is higher with mineralized bone particles than with demineralized bone particles. In conclusion, these results indicated that MSM could promote differentiation and osteogenic potential of SHED cells. This osteogenic property is more in the presence of mineralized bone particles. TG2 is a likely cue in the regulation of differentiation and mineral deposition of SHED cells in response to MSM.
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Affiliation(s)
- Hanan Aljohani
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, MD, United States of America
- Department of Oral Medicine and Diagnostics Sciences, King Saud University School of Dentistry, Riyadh, KSA
| | - Linda T. Senbanjo
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, MD, United States of America
| | - Meenakshi A. Chellaiah
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, MD, United States of America
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30
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Senbanjo LT, AlJohani H, Majumdar S, Chellaiah MA. Characterization of CD44 intracellular domain interaction with RUNX2 in PC3 human prostate cancer cells. Cell Commun Signal 2019; 17:80. [PMID: 31331331 PMCID: PMC6647163 DOI: 10.1186/s12964-019-0395-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 07/15/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Expression of CD44 receptor is associated with the onset of several tumors. The intracellular domain of CD44 (CD44-ICD) has been implicated as a co-transcription factor for RUNX2 in the regulation of expression of MMP-9 in breast carcinoma cells. Previous studies from our laboratory demonstrated the role of CD44 in migration and invasion of PC3 prostate cells through activation of MMP-9. CD44 signaling regulates the phosphorylation and hence the localization of RUNX2 in the nucleus. The role of CD44-ICD has not been studied in prostate cancer cells. This study aimed to explore the role of CD44-ICD and RUNX2 in the regulation of expression of metastasis-related genes. METHODS PC3 and PC3 cells overexpressing RUNX2 protein were analyzed for RUNX2/CD44-ICD interaction by immunoprecipitation, immunoblotting, and Immunofluorescence analyses. Wound healing and tumorsphere formation analyses were also done in these cells. The real-time PCR analysis was used to detect the expression levels of different genes. RESULTS Expression of CD44 and RUNX2 was observed only in PC3 cells (androgen receptor positive) and not in LNCaP or PCa2b cells (androgen receptor negative). Therefore, CD44-ICD fragment (~ 15-16 kDa) was observed in PC3 cells. Moreover, localization of CD44-ICD was more in the nucleus than in the cytoplasm of PC3 cells. Inhibition of cleavage of CD44 with a γ-secretase inhibitor, DAPT reduced the formation of CD44-ICD; however, accumulation of CD44-external truncation fragments (~ 20 and ~ 25 kDa) was detected. RUNX2 and CD44-ICD interact in the nucleus of PC3 cells, and this interaction was more in PC3 cells transfected with RUNX2 cDNA. Overexpression of RUNX2 augments the expression of metastasis-related genes (e.g., MMP-9 and osteopontin) which resulted in increased migration and tumorsphere formation. CONCLUSIONS We have shown here a strong functional relationship between CD44-ICD and RUNX2 in PC3 cells. RUNX2 forms a complex with CD44-ICD as a co-transcriptional factor, and this complex formation not only activates the expression of metastasis-related genes but also contributes to migration and tumorsphere formation. Therefore, RUNX2 and CD44-ICD are potential targets for anti-cancer therapy, and attenuation of their interaction may validate the regulatory effects of these proteins on cancer migration and progression.
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Affiliation(s)
- Linda T Senbanjo
- Department of Oncology and Diagnostic Sciences, University of Maryland Dental School, 650 W Baltimore St., 7th floor (south), Rm7207, Baltimore, MD, 21201, USA
| | - Hanan AlJohani
- Department of Oncology and Diagnostic Sciences, University of Maryland Dental School, 650 W Baltimore St., 7th floor (south), Rm7207, Baltimore, MD, 21201, USA
| | - Sunipa Majumdar
- Department of Oncology and Diagnostic Sciences, University of Maryland Dental School, 650 W Baltimore St., 7th floor (south), Rm7207, Baltimore, MD, 21201, USA
| | - Meenakshi A Chellaiah
- Department of Oncology and Diagnostic Sciences, University of Maryland Dental School, 650 W Baltimore St., 7th floor (south), Rm7207, Baltimore, MD, 21201, USA.
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31
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Pang X, Gong K, Zhang X, Wu S, Cui Y, Qian BZ. Osteopontin as a multifaceted driver of bone metastasis and drug resistance. Pharmacol Res 2019; 144:235-244. [PMID: 31028902 DOI: 10.1016/j.phrs.2019.04.030] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/21/2019] [Accepted: 04/23/2019] [Indexed: 02/06/2023]
Abstract
Metastasis to bone frequently occurs in majority of patients with advanced breast cancer and prostate cancer, leading to devastating skeletal-related events and substantially reducing the survival of patients. Currently, the crosstalk between tumor cells and the bone stromal compartment was widely investigated for bone metastasis and the resistance to many conventional therapeutic methods. Osteopontin (OPN), also known as SPP1 (secreted phosphoprotein 1), a secreted and chemokine-like glyco-phosphoprotein is involved in tumor progression such as cell proliferation, angiogenesis, and metastasis. The expression of OPN in tumor tissue and plasma has been clinically proved to be correlated to poor prognosis and shortened survival in patients with breast cancer and prostate cancer. This review summarizes the multifaceted roles that OPN plays in bone microenvironment and drug resistance, with emphasis on breast and prostate cancers, via binding to αvβ3 integrin and CD44 receptor and inducing signaling cascades. We further discuss the promising therapeutic strategy for OPN targeting, mainly inhibiting OPN at transcriptional or protein level or blocking it binding to receptor or its downstream signaling pathways. The comprehending of the function of OPN in bone microenvironment is crucial for the development of novel biomarker and potential therapeutic target for the diagnosis and treatment of bone metastasis and against the emergence of drug resistance in advanced cancers.
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Affiliation(s)
- Xiaocong Pang
- Department of Pharmacy, Peking University First Hospital, Xicheng District, 10034, Beijing, China
| | - Kan Gong
- Department of Urology, Peking University First Hospital, Xicheng District, 10034, Beijing, China
| | - Xiaodan Zhang
- Department of Pharmacy, Peking University First Hospital, Xicheng District, 10034, Beijing, China
| | - Shiliang Wu
- Department of Urology, Peking University First Hospital, Xicheng District, 10034, Beijing, China
| | - Yimin Cui
- Department of Pharmacy, Peking University First Hospital, Xicheng District, 10034, Beijing, China.
| | - Bin-Zhi Qian
- Translational Medicine Center, The Second Affiliated Hospital, Guangzhou Medical University.University of Edinburgh and MRC Centre for Reproductive Health, 2 Edinburgh Cancer Research UK Centre Queen's Medical Research Institute, EH16 4TJ, Edinburgh, United Kingdom; Translational Medicine Center, The Second Affiliated Hospital, Guangzhou Medical University, Haizhu District, 510260, Guangzhou, China.
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32
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He ZC, Li XY, Guo YL, Ma D, Fang Q, Ren LL, Zhang ZY, Wang W, Yu ZY, Zhao P, Wang JS. Heme oxygenase-1 attenuates the inhibitory effect of bortezomib against the APRIL-NF-κB-CCL3 signaling pathways in multiple myeloma cells: Corelated with bortezomib tolerance in multiple myeloma. J Cell Biochem 2019; 120:6972-6987. [PMID: 30368867 DOI: 10.1002/jcb.27879] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 09/21/2018] [Indexed: 01/24/2023]
Abstract
Osteoclasts (OCs) play an essential role in bone destruction in patients with multiple myeloma (MM). Bortezomib can ameliorate bone destruction in patients with MM, but advanced MM often resists bortezomib. We studied the molecular mechanisms of bortezomib tolerance in MM. The expression of the MM-related genes in newly diagnosed patients with MM and normal donors were studied. C-C motif chemokine ligand 3 (CCL3) is a cytokine involved in the differentiation of OCs, and its expression is closely related to APRIL (a proliferation-inducing ligand). We found that bortezomib treatment inhibited APRIL and CCL3. But the heme oxygenase-1 (HO-1) activator hemin attenuated the inhibitory effects of bortezomib on APRIL and CCL3. We induced mononuclear cells to differentiate into OCs, and the enzyme-linked immunosorbent assay showed that the more OCs differentiated, the higher the levels CCL3 secretions detected. Animal experiments showed that hemin promoted MM cell infiltration in mice. The weight and survival rate of tumor mice were associated with HO-1 expression. Immunohistochemical staining showed that HO-1, APRIL, and CCL3 staining were positively stained in the tumor infiltrating sites. Then, MM cells were transfected with L-HO-1/si-HO-1 expression vectors and cultured with an nuclear factor (NF)-kappa B (κB) pathway inhibitor, QNZ. The results showed that HO-1 was the upstream gene of APRIL, NF-κB, and CCL3. We showed that HO-1 could attenuate the inhibitory effect of bortezomib against the APRIL-NF-κB-CCL3 signaling pathways in MM cells, and the tolerance of MM cells to bortezomib and the promotion of bone destruction are related to HO-1.
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Affiliation(s)
- Zheng C He
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Xin Y Li
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Yong L Guo
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Dan Ma
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Qin Fang
- Department of Pharmacy, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Ling L Ren
- Department of Hematology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Zhao Y Zhang
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Weili Wang
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Zheng Y Yu
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Peng Zhao
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Ji S Wang
- Department of Hematology, Affiliated Hospital of Medical University, Guiyang, China.,Hematological Institute of Guizhou Province, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.,Guizhou Provincial Laboratory of Hematopoietic Stem Cell Transplantation Centre, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
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33
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Srinivasan D, Senbanjo L, Majumdar S, Franklin RB, Chellaiah MA. Androgen receptor expression reduces stemness characteristics of prostate cancer cells (PC3) by repression of CD44 and SOX2. J Cell Biochem 2019; 120:2413-2428. [PMID: 30206982 PMCID: PMC6411465 DOI: 10.1002/jcb.27573] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 08/02/2018] [Indexed: 01/24/2023]
Abstract
Studies have shown that a subgroup of tumor cells possess stemness characteristics having self-renewal capacity and the ability to form new tumors. We sought to identify the plausible stemness factor that determines the "molecular signature" of prostate cancer (PCa) cells derived from different metastases (PC3, PCa2b, LNCaP, and DU145) and whether androgen receptor (AR) influences the maintenance of stemness features. Here we show sex-determining region Y (SRY)-box 2 (SOX2) as a putative stem cell marker in PC3 PCa cells and not in DU145, PCa2b, or LNCaP cells. PCa2b and PC3 cells were derived from bone metastases. PCa2b cells which are positive for the AR failed to demonstrate the expression of either cluster of differentiation 44 (CD44) or SOX2. Knockdown (KD) of AR in these cells did not affect the expression of either CD44 or SOX2. Conversely, PC3 cells, which are negative for AR, expressed both CD44 and SOX2. However, the expression of AR downregulated the expression of both CD44 and SOX2 in PC3 cells. CD44 regulates SOX2 expression as KD of CD44 and reduces SOX2 levels considerably. SOX2 KD attenuated not only the expression of SNAIL and SLUG but also the migration and tumorsphere formation in PC3 cells. Collectively, our findings underscore a novel role of CD44 signaling in the maintenance of stemness and progression of cancer through SOX2 in AR-independent PC3 cells. SOX2 has a role in the regulation of expression of SNAIL and SLUG. SOX2 could be a potential therapeutic target to thwart the progression of SOX2-positive cancer cells or recurrence of androgen-independent PCa.
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Affiliation(s)
- Deepa Srinivasan
- Department of Oncology and Diagnostic SciencesUniversity of Maryland Dental SchoolBaltimoreMaryland
| | - Linda Senbanjo
- Department of Oncology and Diagnostic SciencesUniversity of Maryland Dental SchoolBaltimoreMaryland
| | - Sunipa Majumdar
- Department of Oncology and Diagnostic SciencesUniversity of Maryland Dental SchoolBaltimoreMaryland
| | - Renty B. Franklin
- Department of Oncology and Diagnostic SciencesUniversity of Maryland Dental SchoolBaltimoreMaryland
| | - Meenakshi A. Chellaiah
- Department of Oncology and Diagnostic SciencesUniversity of Maryland Dental SchoolBaltimoreMaryland
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34
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Villanueva F, Araya H, Briceño P, Varela N, Stevenson A, Jerez S, Tempio F, Chnaiderman J, Perez C, Villarroel M, Concha E, Khani F, Thaler R, Salazar-Onfray F, Stein GS, van Wijnen AJ, Galindo M. The cancer-related transcription factor RUNX2 modulates expression and secretion of the matricellular protein osteopontin in osteosarcoma cells to promote adhesion to endothelial pulmonary cells and lung metastasis. J Cell Physiol 2019; 234:13659-13679. [PMID: 30637720 DOI: 10.1002/jcp.28046] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 12/06/2018] [Indexed: 12/19/2022]
Abstract
Osteosarcomas are bone tumors that frequently metastasize to the lung. Aberrant expression of the transcription factor, runt-related transcription factor 2 (RUNX2), is a key pathological feature in osteosarcoma and associated with loss of p53 and miR-34 expression. Elevated RUNX2 may transcriptionally activate genes mediating tumor progression and metastasis, including the RUNX2 target gene osteopontin (OPN/SPP1). This gene encodes a secreted matricellular protein produced by osteoblasts to regulate bone matrix remodeling and tissue calcification. Here we investigated whether and how the RUNX2/OPN axis regulates lung metastasis of osteosarcoma. Importantly, RUNX2 depletion attenuates lung metastasis of osteosarcoma cells in vivo. Using next-generation RNA-sequencing, protein-based assays, as well as the loss- and gain-of-function approaches in selected osteosarcoma cell lines, we show that osteopontin messenger RNA levels closely correlate with RUNX2 expression and that RUNX2 controls the levels of secreted osteopontin. Elevated osteopontin levels promote heterotypic cell-cell adhesion of osteosarcoma cells to human pulmonary microvascular endothelial cells, but not in the presence of neutralizing antibodies. Collectively, these findings indicate that the RUNX2/OPN axis regulates the ability of osteosarcoma cells to attach to pulmonary endothelial cells as a key step in metastasis of osteosarcoma cells to the lung.
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Affiliation(s)
- Francisco Villanueva
- Millennium Institute on Immunology and Immunotherapy, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Hector Araya
- Millennium Institute on Immunology and Immunotherapy, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Pedro Briceño
- Millennium Institute on Immunology and Immunotherapy, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Nelson Varela
- Millennium Institute on Immunology and Immunotherapy, University of Chile, Santiago, Chile.,Department of Medical Technology, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Andres Stevenson
- Millennium Institute on Immunology and Immunotherapy, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Sofia Jerez
- Millennium Institute on Immunology and Immunotherapy, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Fabian Tempio
- Millennium Institute on Immunology and Immunotherapy, University of Chile, Santiago, Chile.,Program of Immunology, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Jonas Chnaiderman
- Program of Virology, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Carola Perez
- Laboratory Animal Facility, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Milena Villarroel
- Department of Oncology, Hospital Dr. Luis Calvo Mackenna, Santiago, Chile.,National Child Programme of Antineoplastic Drugs (PINDA), Santiago, Chile
| | - Emma Concha
- Department of Oncology, Hospital Dr. Luis Calvo Mackenna, Santiago, Chile
| | - Farzaneh Khani
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota.,Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota
| | - Roman Thaler
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota.,Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota
| | - Flavio Salazar-Onfray
- Millennium Institute on Immunology and Immunotherapy, University of Chile, Santiago, Chile.,Program of Immunology, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Gary S Stein
- Department of Biochemistry, University of Vermont Cancer Center, The Robert Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Andre J van Wijnen
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota.,Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota
| | - Mario Galindo
- Millennium Institute on Immunology and Immunotherapy, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
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35
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Ouhtit A, Rizeq B, Saleh HA, Rahman MM, Zayed H. Novel CD44-downstream signaling pathways mediating breast tumor invasion. Int J Biol Sci 2018; 14:1782-1790. [PMID: 30443182 PMCID: PMC6231220 DOI: 10.7150/ijbs.23586] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 02/04/2018] [Indexed: 01/06/2023] Open
Abstract
CD44, also known as homing cell adhesion molecule is a multi-structural cell molecule involved in cell-cell and cell-extracellular matrix communications. CD44 regulates a number of central signaling pathways, including PI3K/AKT, Rho GTPases and the Ras-MAPK pathways, but also acts as a growth/arrest sensor, and inhibitor of angiogenesis and invasion, in response to signals from the microenvironment. The function of CD44 has been very controversial since it acts as both, a suppressor and a promoter of tumor growth and progression. To address this discrepancy, we have previously established CD44-inducible system both in vitro and in vivo. Next, using microarray analysis, we have identified and validated Survivin, Cortactin and TGF-β2 as novel CD44-downstream target genes, and characterized their signaling pathways underpinning CD44-promoted breast cancer (BC) cell invasion. This report aims to update the literature by adding and discussing the impact of these novel three signaling pathways to better understand the CD44-signaling pathways involved in BC tumor cell invasion.
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Affiliation(s)
- Allal Ouhtit
- Department of Biological and Environmental Sciences, College of Arts & Sciences, Qatar University, Doha, Qatar
| | - Balsam Rizeq
- Department of Biological and Environmental Sciences, College of Arts & Sciences, Qatar University, Doha, Qatar.,Biomedical Research Center, Qatar University, Doha, Qatar
| | - Haissam Abou Saleh
- Department of Biological and Environmental Sciences, College of Arts & Sciences, Qatar University, Doha, Qatar
| | - Md Mizanur Rahman
- Department of Biological and Environmental Sciences, College of Arts & Sciences, Qatar University, Doha, Qatar
| | - Hatem Zayed
- Department of Biomedical Sciences, College of Health Sciences, Qatar University, Doha, Qatar
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36
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Efficient synthesis of cRGD functionalized polymers as building blocks of targeted drug delivery systems. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.04.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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37
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Kanwal R, Shukla S, Walker E, Gupta S. Acquisition of tumorigenic potential and therapeutic resistance in CD133+ subpopulation of prostate cancer cells exhibiting stem-cell like characteristics. Cancer Lett 2018; 430:25-33. [PMID: 29775627 DOI: 10.1016/j.canlet.2018.05.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/08/2018] [Accepted: 05/10/2018] [Indexed: 12/12/2022]
Abstract
The role of CD133 (Prominin-1) as a cancer stem cell marker may be useful for therapeutic approaches and prognostication in prostate cancer patients. We investigated the stem-cell-related function and biological features of a subpopulation of CD133+ cells isolated from established primary human prostate cancer cell lines. The CD133+ cells sorted from human prostate cancer 22Rv1 exhibited high clonogenic and tumorigenic capabilities, sphere forming capacity and serially reinitiated transplantable tumors in NOD-SCID mice. Gene profiling analysis of CD133+ cells showed upregulation of markers of stem cell differentiation (CD44, Oct4, SOX9 and Nanog), epithelial-to-mesenchymal transition (c-myc and BMI1), osteoblastic differentiation (Runx2), and skeletal morphogenesis (BMP2), compared to side population of CD133- cells. These cells are highly malignant and resistant to γ-radiation and chemotherapeutic drug, docetaxel. Importantly, a docetaxel-resistant subclone was more enriched in CD133+ cells with significant increase in Runx2 expression, compared to CD133- cells. Furthermore, knockdown of Runx2 in these cells resulted in differential response to chemotherapy, sensitizing them to increased cell death. These results demonstrate therapy-resistant population with stem-like features are distinct subpopulation of malignant cells that resides within parental cell lines. The molecular signature of CD133+ cells may lead to identification of novel therapeutic targets and prognostic markers in the treatment of prostate cancer.
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Affiliation(s)
- Rajnee Kanwal
- Department of Urology, Case Western Reserve University, School of Medicine, Cleveland, OH, 44106, USA; The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, 44106, USA; Department of Urology, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH, 44106, USA
| | - Sanjeev Shukla
- Department of Urology, Case Western Reserve University, School of Medicine, Cleveland, OH, 44106, USA; The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, 44106, USA
| | - Ethan Walker
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Sanjay Gupta
- Department of Urology, Case Western Reserve University, School of Medicine, Cleveland, OH, 44106, USA; The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, 44106, USA; Department of Urology, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH, 44106, USA; Department of Nutrition, Case Western Reserve University, Cleveland, OH, 44106, USA; Division of General Medical Sciences, Case Comprehensive Cancer Center, Cleveland, OH, 44106, USA.
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38
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Graham N, Qian BZ. Mesenchymal Stromal Cells: Emerging Roles in Bone Metastasis. Int J Mol Sci 2018; 19:E1121. [PMID: 29642534 PMCID: PMC5979535 DOI: 10.3390/ijms19041121] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 03/25/2018] [Accepted: 03/29/2018] [Indexed: 12/13/2022] Open
Abstract
Bone metastasis is the most advanced stage of many cancers and indicates a poor prognosis for patients due to resistance to anti-tumor therapies. The establishment of metastasis within the bone is a multistep process. To ensure survival within the bone marrow, tumor cells must initially colonize a niche in which they can enter dormancy. Subsequently, reactivation permits the proliferation and growth of the tumor cells, giving rise to a macro-metastasis displayed clinically as a bone metastatic lesion. Here, we review the evidences that suggest mesenchymal stromal cells play an important role in each of these steps throughout the development of bone metastasis. Similarities between the molecular mechanisms implicated in these processes and those involved in the homeostasis of the bone indicate that the metastatic cells may exploit the homeostatic processes to their own advantage. Identifying the molecular interactions between the mesenchymal stromal cells and tumor cells that promote tumor development may offer insight into potential therapeutic targets that could be utilized to treat bone metastasis.
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Affiliation(s)
- Nicola Graham
- Centre for Reproductive Health, Queens Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK.
| | - Bin-Zhi Qian
- Centre for Reproductive Health, Queens Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK.
- Edinburgh Cancer Research UK Centre, University of Edinburgh, Edinburgh EH4 2XR, UK.
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39
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MicroRNA-93-5p may participate in the formation of morphine tolerance in bone cancer pain mouse model by targeting Smad5. Oncotarget 2018; 7:52104-52114. [PMID: 27438143 PMCID: PMC5239538 DOI: 10.18632/oncotarget.10524] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 06/30/2016] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVE In this study, we aim to find out the role of microRNA-93-5p (miR-93) and Smad5 in morphine tolerance in mouse models of bone cancer pain (BCP). RESULTS At 7 days after injection of morphine, the PMWT showed no significant difference between the morphine model group and the saline model group (P < 0.05), suggesting that morphine tolerance had formed in the morphine model group. The morphine model group had higher miR-93 expression and lower Smad5 mRNA expression than the saline model group. Smad5 is a downstream target gene of miR-93. At 7, 9 and 14 days after injection of lentiviruses, the L/anti-miR-93 group had the lowest PMWTs, while the Smad5 shRNA group presented the highest PMWTs among these five groups (all P < 0.05). METHODS We built mouse models of BCP and morphine tolerance and recorded 50% PMWT. After 6 days of modeling, we set saline control group, morphine control, saline model group and morphine model group (morphine tolerance emerged). We performed luciferase reporter gene assay to verify the relation between miR-93 and Smad5. After lentivirus transfection, the mice with morphine tolerance were assigned into L/anti-miR-93 group, Smad5 shRNA group, L/anti-miR-93 + Smad5 shRNA group, blank group and PBS control group. RT-qPCR, Western Blot assay and immumohistochemical staining were performed to observe the changes of miR-93 and Smad5. CONCLUSION Up-regulation of miR-93 may contribute to the progression of morphine tolerance by targeting Smad5 in mouse model of BCP.
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40
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IFN-β regulates Th17 differentiation partly through the inhibition of osteopontin in experimental autoimmune encephalomyelitis. Mol Immunol 2018; 93:20-30. [DOI: 10.1016/j.molimm.2017.11.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 10/08/2017] [Accepted: 11/06/2017] [Indexed: 11/15/2022]
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41
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Kwakwa KA, Sterling JA. Integrin αvβ3 Signaling in Tumor-Induced Bone Disease. Cancers (Basel) 2017; 9:cancers9070084. [PMID: 28698458 PMCID: PMC5532620 DOI: 10.3390/cancers9070084] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 07/05/2017] [Accepted: 07/05/2017] [Indexed: 11/22/2022] Open
Abstract
Tumor-induced bone disease is common among patients with advanced solid cancers, especially those with breast, prostate, and lung malignancies. The tendency of these cancers to metastasize to bone and induce bone destruction is, in part, due to alterations in integrin expression and signaling. Substantial evidence from preclinical studies shows that increased expression of integrin αvβ3 in tumor cells promotes the metastatic and bone-invasive phenotype. Integrin αvβ3 mediates cell adhesion to several extracellular matrix proteins in the bone microenvironment which is necessary for tumor cell colonization as well as the transmission of mechanical signals for tumor progression. This review will discuss the αvβ3 integrin receptor in the context of tumor-induced bone disease. Specifically, the focus will be the role of αvβ3 in modulating cancer metastasis to bone and tumor cell response to the bone microenvironment, including downstream signaling pathways that contribute to tumor-induced osteolysis. A better understanding of integrin dysregulation in cancer is critical to developing new therapeutics for the prevention and treatment of bone metastases.
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Affiliation(s)
- Kristin A Kwakwa
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN 37212, USA.
- Vanderbilt Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
- Department of Cancer Biology, Vanderbilt University, Nashville, TN 37232, USA.
| | - Julie A Sterling
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN 37212, USA.
- Vanderbilt Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
- Department of Cancer Biology, Vanderbilt University, Nashville, TN 37232, USA.
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, USA.
- Department of Medicine, Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
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Xu D, Zhao ZQ, Chen ST, Yang Y, Fang W, Liu S. Iminodiacetic acid as bifunctional linker for dimerization of cyclic RGD peptides. Nucl Med Biol 2017; 48:1-8. [DOI: 10.1016/j.nucmedbio.2017.01.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 01/03/2017] [Accepted: 01/17/2017] [Indexed: 12/18/2022]
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Jiang Y, Dai J, Yao Z, Shelley G, Keller ET. Abituzumab Targeting of αV-Class Integrins Inhibits Prostate Cancer Progression. Mol Cancer Res 2017; 15:875-883. [PMID: 28314844 DOI: 10.1158/1541-7786.mcr-16-0447] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 01/17/2017] [Accepted: 03/10/2017] [Indexed: 12/22/2022]
Abstract
Integrins that contain an integrin αV subunit contribute to multiple functions that promote cancer progression. The goal of this study was to determine whether abituzumab (DI17E6, EMD 525797), a humanized monoclonal antibody (mAb) against integrin αV impacts, prostate cancer progression. To evaluate this, prostate cancer cells were treated with DI17E6 and its effects on proliferation, apoptosis, cell-cycle, adhesion, detachment, migration, invasion and phosphorylation of downstream targets, including FAK, Akt, and ERK, were determined. DI17E6 promoted detachment and inhibited adhesion of prostate cancer cells to several extracellular matrix (ECM) proteins and cells found in the bone microenvironment but had no impact on cell viability, cell-cycle, and caspase-3/7 activity. DI17E6 inhibited migration and invasion of prostate cancer cells. In addition, DI7E6 decreased phosphorylation of FAK, Akt, and ERK. These results indicate that inhibition of integrin αV with DI17E6 inhibits several prometastatic phenotypes of prostate cancer cells and therefore provide a rationale for further evaluation of DI17E6 for diminishing prostate cancer progression.Implications: This work identifies that therapeutic targeting of integrins containing an αV integrin unit inhibits cancer progression and thus may be of clinical benefit. Mol Cancer Res; 15(7); 875-83. ©2017 AACR.
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Affiliation(s)
- Yuan Jiang
- Department of Urology, University of Michigan, Ann Arbor, Michigan
- Department of Immunology, Tianjin Medical University, Tianjin, China
| | - Jinlu Dai
- Department of Urology, University of Michigan, Ann Arbor, Michigan
| | - Zhi Yao
- Department of Immunology, Tianjin Medical University, Tianjin, China
| | - Greg Shelley
- Department of Urology, University of Michigan, Ann Arbor, Michigan
| | - Evan T Keller
- Department of Urology, University of Michigan, Ann Arbor, Michigan.
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan
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Garimella R, Tadikonda P, Tawfik O, Gunewardena S, Rowe P, Van Veldhuizen P. Vitamin D Impacts the Expression of Runx2 Target Genes and Modulates Inflammation, Oxidative Stress and Membrane Vesicle Biogenesis Gene Networks in 143B Osteosarcoma Cells. Int J Mol Sci 2017; 18:ijms18030642. [PMID: 28300755 PMCID: PMC5372654 DOI: 10.3390/ijms18030642] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 02/14/2017] [Accepted: 02/15/2017] [Indexed: 12/15/2022] Open
Abstract
Osteosarcoma (OS) is an aggressive malignancy of bone affecting children, adolescents and young adults. Understanding vitamin D metabolism and vitamin D regulated genes in OS is an important aspect of vitamin D/cancer paradigm, and in evaluating vitamin D as adjuvant therapy for human OS. Vitamin D treatment of 143B OS cells induced significant and novel changes in the expression of genes that regulate: (a) inflammation and immunity; (b) formation of reactive oxygen species, metabolism of cyclic nucleotides, sterols, vitamins and mineral (calcium), quantity of gap junctions and skeletogenesis; (c) bone mineral density; and (d) cell viability of skeletal cells, aggregation of bone cancer cells and exocytosis of secretory vesicles. Ingenuity pathway analysis revealed significant reduction in Runx2 target genes such as fibroblast growth factor -1, -12 (FGF1 and FGF12), bone morphogenetic factor-1 (BMP1), SWI/SNF related, matrix associated actin dependent regulator of chromatin subfamily a, member 4 (SMARCA4), Matrix extracellular phosphoglycoprotein (MEPE), Integrin, β4 (ITGBP4), Matrix Metalloproteinase -1, -28 (MMP1 and MMP28), and signal transducer and activator of transcription-4 (STAT4) in vitamin D treated 143B OS cells. These genes interact with the inflammation, oxidative stress and membrane vesicle biogenesis gene networks. Vitamin D not only inhibited the expression of Runx2 target genes MMP1, MMP28 and kallikrein related peptidase-7 (KLK7), but also migration and invasion of 143B OS cells. Vitamin D regulated Runx2 target genes or their products represent potential therapeutic targets and laboratory biomarkers for applications in translational oncology.
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Affiliation(s)
- Rama Garimella
- Division of Medical Clinical Oncology, The University of Kansas Medical Center, Kansas City, KS 66160, USA.
- Departments of Internal Medicine, The University of Kansas Medical Center, Kansas City, KS 66160, USA.
- Orthopedic Surgery, The University of Kansas Medical Center, Kansas City, KS 66160, USA.
- Dietetics and Nutrition, The University of Kansas Medical Center, Kansas City, KS 66160, USA.
- Midwest Biomedical Research Foundation-KCVAMC Affiliate, Kansas City, KS 64128, USA.
- Hematology and Oncology, Kansas City Veterans Affairs Medical Center, Kansas City, MO 64128, USA.
- School of Dentistry, University of Missouri-Kansas City, Kansas City, MO 64108, USA.
| | - Priyanka Tadikonda
- Dietetics and Nutrition, The University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Ossama Tawfik
- Pathology and Laboratory Medicine, The University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Sumedha Gunewardena
- Molecular and Integrative Physiology, The University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Peter Rowe
- Departments of Internal Medicine, The University of Kansas Medical Center, Kansas City, KS 66160, USA.
- Kidney Institute, The University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Peter Van Veldhuizen
- Division of Medical Clinical Oncology, The University of Kansas Medical Center, Kansas City, KS 66160, USA.
- Departments of Internal Medicine, The University of Kansas Medical Center, Kansas City, KS 66160, USA.
- Sarah Cannon HCA Midwest Health Cancer Network, Overland Park, KS 66209, USA.
- Hematology and Oncology, Kansas City Veterans Affairs Medical Center, Kansas City, MO 64128, USA.
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Li XL, Liu L, Li DD, He YP, Guo LH, Sun LP, Liu LN, Xu HX, Zhang XP. Integrin β4 promotes cell invasion and epithelial-mesenchymal transition through the modulation of Slug expression in hepatocellular carcinoma. Sci Rep 2017; 7:40464. [PMID: 28084395 PMCID: PMC5233967 DOI: 10.1038/srep40464] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 12/06/2016] [Indexed: 02/08/2023] Open
Abstract
Integrin β4 (ITGB4) is a transmembrane receptor involved in tumorigenesis and the invasiveness of many cancers. However, its role in hepatocellular carcinoma (HCC), one of the most prevalent human cancers worldwide, remains unclear. Here, we examined the involvement of ITGB4 in HCC and explored the underlying mechanisms. Real-time PCR and immunohistochemical analyses of tissues from 82 patients with HCC and four HCC cell lines showed higher ITGB4 levels in tumor than in adjacent non-tumor tissues and in HCC than in normal hepatic cells. Silencing of ITGB4 repressed cell proliferation, colony forming ability and cell invasiveness, whereas ectopic expression of ITGB4 promoted the proliferation and invasion of HCC cells and induced epithelial to mesenchymal transition (EMT) in parallel with the upregulation of Slug, as shown by transwell assays, WB and immunocytochemistry. Knockdown of Slug reduced cell viability inhibited invasion and reversed the effects of ITBG4 overexpression on promoting EMT, and AKT/Sox2-Nanog may also be involved. In a xenograft tumor model induced by injection of ITGB4-overexpressing cells into nude mice, ITGB4 promoted tumor growth and metastasis to the lungs. Taken together, our results indicate that ITGB4 plays a tumorigenic and pro-metastatic role mediated by Slug and suggest IGTB4 could be a prognostic indicator or a therapeutic target in patients with HCC.
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Affiliation(s)
- Xiao-Long Li
- Department of Medical Ultrasound, Shanghai Tenth People’s Hospital, Ultrasound Research and Educational Institute, Tongji University School of Medicine, Shanghai 200072, China
| | - Lin Liu
- Department of Interventional & Vascular Surgery, Tongji University School of Medicine, Shanghai 200072, China
| | - Dan-Dan Li
- Department of Medical Ultrasound, Shanghai Tenth People’s Hospital, Ultrasound Research and Educational Institute, Tongji University School of Medicine, Shanghai 200072, China
| | - Ya-Ping He
- Department of Medical Ultrasound, Shanghai Tenth People’s Hospital, Ultrasound Research and Educational Institute, Tongji University School of Medicine, Shanghai 200072, China
| | - Le-Hang Guo
- Department of Medical Ultrasound, Shanghai Tenth People’s Hospital, Ultrasound Research and Educational Institute, Tongji University School of Medicine, Shanghai 200072, China
| | - Li-Ping Sun
- Department of Medical Ultrasound, Shanghai Tenth People’s Hospital, Ultrasound Research and Educational Institute, Tongji University School of Medicine, Shanghai 200072, China
| | - Lin-Na Liu
- Department of Medical Ultrasound, Shanghai Tenth People’s Hospital, Ultrasound Research and Educational Institute, Tongji University School of Medicine, Shanghai 200072, China
| | - Hui-Xiong Xu
- Department of Medical Ultrasound, Shanghai Tenth People’s Hospital, Ultrasound Research and Educational Institute, Tongji University School of Medicine, Shanghai 200072, China,
| | - Xiao-Ping Zhang
- Department of Interventional & Vascular Surgery, Tongji University School of Medicine, Shanghai 200072, China,
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Klobučar M, Sedić M, Gehrig P, Grossmann J, Bilić M, Kovač-Bilić L, Pavelić K, Kraljević Pavelić S. Basement membrane protein ladinin-1 and the MIF-CD44-β1 integrin signaling axis are implicated in laryngeal cancer metastasis. Biochim Biophys Acta Mol Basis Dis 2016; 1862:1938-54. [PMID: 27460703 DOI: 10.1016/j.bbadis.2016.07.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 07/06/2016] [Accepted: 07/22/2016] [Indexed: 12/14/2022]
Abstract
Laryngeal squamous cell carcinoma (LSCC) is the most common form of malignant disease in the head and neck region characterized by frequent occurrence of metastases in the neck lymph nodes early in the disease onset. In the presented study, we performed quantitative proteomic profiling of patient-matched primary tumor and adjacent non-tumorous tissues derived from metastatic LSCC as to identify new protein candidates with potential diagnostic and therapeutic significance. Obtained results revealed for the first time involvement of the basement membrane protein ladinin-1 in laryngeal cancer metastases. Alterations in the cellular microenvironment that propel metastatic events in laryngeal cancer include activation of MIF-CD44-β1 integrin signal transduction pathway and induction of downstream signaling mediated by NF-κB and Src tyrosine kinase, which ultimately impinge on cytoskeletal dynamics and architecture resulting in increased cellular motility and invasiveness. In this context, particularly interesting finding is upregulation of several actin-binding proteins novel to laryngeal cancer pathogenesis including coronin-1C and plastin-2, whose functional significance in laryngeal carcinogenesis has yet to be established. We also detected for the first time a complete loss of afamin in metastatic laryngeal cancer tissues, which warrants further studies into its use as a possible marker for monitoring disease progression and/or treatment outcome.
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Affiliation(s)
- Marko Klobučar
- University of Rijeka, Department of Biotechnology, Centre for High-throughput Technologies, Radmile Matejčić 2, 51000 Rijeka, Croatia
| | - Mirela Sedić
- University of Rijeka, Department of Biotechnology, Centre for High-throughput Technologies, Radmile Matejčić 2, 51000 Rijeka, Croatia
| | - Peter Gehrig
- Functional Genomics Center Zürich, University of Zurich/ETH Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Jonas Grossmann
- Functional Genomics Center Zürich, University of Zurich/ETH Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Mario Bilić
- University Department of ENT, Head and Neck Surgery, Kišpatićeva 12, 10000 Zagreb, Croatia
| | - Lana Kovač-Bilić
- University Department of ENT, Head and Neck Surgery, Kišpatićeva 12, 10000 Zagreb, Croatia
| | - Krešimir Pavelić
- University of Rijeka, Department of Biotechnology, Centre for High-throughput Technologies, Radmile Matejčić 2, 51000 Rijeka, Croatia
| | - Sandra Kraljević Pavelić
- University of Rijeka, Department of Biotechnology, Centre for High-throughput Technologies, Radmile Matejčić 2, 51000 Rijeka, Croatia.
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Shi J, Wang F, Liu S. Radiolabeled cyclic RGD peptides as radiotracers for tumor imaging. BIOPHYSICS REPORTS 2016; 2:1-20. [PMID: 27819026 PMCID: PMC5071373 DOI: 10.1007/s41048-016-0021-8] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 03/01/2016] [Indexed: 12/19/2022] Open
Abstract
The integrin family comprises 24 transmembrane receptors, each a heterodimeric combination of one of 18α and one of 8β subunits. Their main function is to integrate the cell adhesion and interaction with the extracellular microenvironment with the intracellular signaling and cytoskeletal rearrangement through transmitting signals across the cell membrane upon ligand binding. Integrin αvβ3 is a receptor for the extracellular matrix proteins containing arginine–glycine–aspartic (RGD) tripeptide sequence. The αvβ3 is generally expressed in low levels on the epithelial cells and mature endothelial cells, but it is highly expressed in many solid tumors. The αvβ3 levels correlate well with the potential for tumor metastasis and aggressiveness, which make it an important biological target for development of antiangiogenic drugs, and molecular imaging probes for early tumor diagnosis. Over the last decade, many radiolabeled cyclic RGD peptides have been evaluated as radiotracers for imaging tumors by SPECT or PET. Even though they are called “αvβ3-targeted” radiotracers, the radiolabeled cyclic RGD peptides are also able to bind αvβ5, α5β1, α6β4, α4β1, and αvβ6 integrins, which may help enhance their tumor uptake due to the “increased receptor population.” This article will use the multimeric cyclic RGD peptides as examples to illustrate basic principles for development of integrin-targeted radiotracers and focus on different approaches to maximize their tumor uptake and T/B ratios. It will also discuss important assays for pre-clinical evaluations of the integrin-targeted radiotracers, and their potential applications as molecular imaging tools for noninvasive monitoring of tumor metastasis and early detection of the tumor response to antiangiogenic therapy.
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Affiliation(s)
- Jiyun Shi
- Interdisciplinary Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China ; Medical Isotopes Research Center, Peking University, Beijing, 100191 China
| | - Fan Wang
- Interdisciplinary Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China ; Medical Isotopes Research Center, Peking University, Beijing, 100191 China
| | - Shuang Liu
- School of Health Sciences, Purdue University, West Lafayette, IN 47907 USA
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Ziaee S, Chu GCY, Huang JM, Sieh S, Chung LWK. Prostate cancer metastasis: roles of recruitment and reprogramming, cell signal network and three-dimensional growth characteristics. Transl Androl Urol 2016; 4:438-54. [PMID: 26816842 PMCID: PMC4708593 DOI: 10.3978/j.issn.2223-4683.2015.04.10] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Prostate cancer (PCa) metastasizes to bone and soft tissues, greatly decreasing quality of life, causing bone pain, skeletal complications, and mortality in PCa patients. While new treatment strategies are being developed, the molecular and cellular basis of PCa metastasis and the “cross-talk” between cancer cells and their microenvironment and crucial cell signaling pathways need to be successfully dissected for intervention. In this review, we introduce a new concept of the mechanism of PCa metastasis, the recruitment and reprogramming of bystander and dormant cells (DCs) by a population of metastasis-initiating cells (MICs). We provide evidence that recruited and reprogrammed DCs gain MICs phenotypes and can subsequently metastasize to bone and soft tissues. We show that MICs can also recruit and reprogram circulating tumor cells (CTCs) and this could contribute to cancer cell evolution and the acquisition of therapeutic resistance. We summarize relevant molecular signaling pathways, including androgen receptors (ARs) and their variants and growth factors (GFs) and cytokines that could contribute to the predilection of PCa for homing to bone and soft tissues. To understand the etiology and the biology of PCa and the effectiveness of therapeutic targeting, we briefly summarize the animal and cell models that have been employed. We also report our experience in the use of three-dimensional (3-D) culture and co-culture models to understand cell signaling networks and the use of these attractive tools to conduct drug screening exercises against already-identified molecular targets. Further research into PCa growth and metastasis will improve our ability to target cancer metastasis more effectively and provide better rationales for personalized oncology.
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Affiliation(s)
- Shabnam Ziaee
- 1 Department of Medicine, Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA ; 2 Australian Prostate Cancer Research Centre, Brisbane, Queensland 4102, Australia ; 3 Department of Surgery, Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Gina Chia-Yi Chu
- 1 Department of Medicine, Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA ; 2 Australian Prostate Cancer Research Centre, Brisbane, Queensland 4102, Australia ; 3 Department of Surgery, Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Jen-Ming Huang
- 1 Department of Medicine, Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA ; 2 Australian Prostate Cancer Research Centre, Brisbane, Queensland 4102, Australia ; 3 Department of Surgery, Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Shirly Sieh
- 1 Department of Medicine, Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA ; 2 Australian Prostate Cancer Research Centre, Brisbane, Queensland 4102, Australia ; 3 Department of Surgery, Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Leland W K Chung
- 1 Department of Medicine, Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA ; 2 Australian Prostate Cancer Research Centre, Brisbane, Queensland 4102, Australia ; 3 Department of Surgery, Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
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McNerney EM, Onate SA. New Insights in the Role of Androgen-to-Estrogen Ratios, Specific Growth Factors and Bone Cell Microenvironment to Potentiate Prostate Cancer Bone Metastasis. NUCLEAR RECEPTOR RESEARCH 2015. [DOI: 10.11131/2015/101186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Eileen M. McNerney
- Molecular Endocrinology and Oncology Laboratory, School of Medicine, University of Concepcion, Chile
| | - Sergio A. Onate
- Molecular Endocrinology and Oncology Laboratory, School of Medicine, University of Concepcion, Chile
- Molecular Endocrinology and Oncology Laboratory, Anatomy and Pathology Building, 2nd Floor, School of Medicine, University of Concepcion, Concepcion, Chile
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Brucella abortus Invasion of Osteocytes Modulates Connexin 43 and Integrin Expression and Induces Osteoclastogenesis via Receptor Activator of NF-κB Ligand and Tumor Necrosis Factor Alpha Secretion. Infect Immun 2015; 84:11-20. [PMID: 26459511 DOI: 10.1128/iai.01049-15] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 10/03/2015] [Indexed: 01/18/2023] Open
Abstract
Osteoarticular brucellosis is the most common localization of human active disease. Osteocytes are the most abundant cells of bone. They secrete factors that regulate the differentiation of both osteoblasts and osteoclasts during bone remodeling. The aim of this study is to determine if Brucella abortus infection modifies osteocyte function. Our results indicate that B. abortus infection induced matrix metalloproteinase 2 (MMP-2), receptor activator for NF-κB ligand (RANKL), proinflammatory cytokines, and keratinocyte chemoattractant (KC) secretion by osteocytes. In addition, supernatants from B. abortus-infected osteocytes induced bone marrow-derived monocytes (BMM) to undergo osteoclastogenesis. Using neutralizing antibodies against tumor necrosis factor alpha (TNF-α) or osteoprotegerin (OPG), RANKL's decoy receptor, we determined that TNF-α and RANKL are involved in osteoclastogenesis induced by supernatants from B. abortus-infected osteocytes. Connexin 43 (Cx43) and the integrins E11/gp38, integrin-α, integrin-β, and CD44 are involved in cell-cell interactions necessary for osteocyte survival. B. abortus infection inhibited the expression of Cx43 but did not modify the expression of integrins. Yet the expression of both Cx43 and integrins was inhibited by supernatants from B. abortus-infected macrophages. B. abortus infection was not capable of inducing osteocyte apoptosis. However, supernatants from B. abortus-infected macrophages induced osteocyte apoptosis in a dose-dependent manner. Taken together, our results indicate that B. abortus infection could alter osteocyte function, contributing to bone damage.
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