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Dao A, McDonald MM, Savage PB, Little DG, Schindeler A. Preventing osteolytic lesions and osteomyelitis in multiple myeloma. J Bone Oncol 2022; 37:100460. [DOI: 10.1016/j.jbo.2022.100460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 10/16/2022] [Accepted: 10/27/2022] [Indexed: 11/05/2022] Open
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2
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Dadzie TG, Green AC. The role of the bone microenvironment in regulating myeloma residual disease and treatment. Front Oncol 2022; 12:999939. [PMID: 36072809 PMCID: PMC9441696 DOI: 10.3389/fonc.2022.999939] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 08/08/2022] [Indexed: 11/28/2022] Open
Abstract
Multiple myeloma is an incurable haematological cancer. The increase in targeted therapies has improved the number of myeloma patients achieving a complete response and improved progression-free survival following therapy. However, a low level of disease or minimal residual disease (MRD) still persists which contributes to the inevitable relapse in myeloma patients. MRD has been attributed to the presence of dormant myeloma cells and their subsequent reactivation, which is controlled by the microenvironment and specialised niches within the bone marrow. This contributes to the evasion of the immune system and chemotherapy, eventually leading to relapse. The growth of myeloma tumours are heavily dependent on environmental stimuli from the bone marrow microenvironment, and this plays a key role in myeloma progression. The bone microenvironment also plays a critical role in myeloma bone disease and the development of skeletal-related events. This review focuses on the bone marrow microenvironment in relation to myeloma pathogenesis and cancer dormancy. Moreover, it reviews the current therapies targeting the bone microenvironment to treat myeloma and myeloma bone disease. Lastly, it identifies novel therapeutic targets for myeloma treatment and the associated bone disease.
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3
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Jiang H, Zhang Z, Yu Y, Chu HY, Yu S, Yao S, Zhang G, Zhang BT. Drug Discovery of DKK1 Inhibitors. Front Pharmacol 2022; 13:847387. [PMID: 35355709 PMCID: PMC8959454 DOI: 10.3389/fphar.2022.847387] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Accepted: 02/21/2022] [Indexed: 12/24/2022] Open
Abstract
Dickkopf-1 (DKK1) is a well-characterized Wnt inhibitor and component of the Wnt/β-catenin signaling pathway, whose dysregulation is associated with multiple abnormal pathologies including osteoporosis, Alzheimer's disease, diabetes, and various cancers. The Wnt signaling pathway has fundamental roles in cell fate determination, cell proliferation, and survival; thus, its mis-regulation can lead to disease. Although DKK1 is involved in other signaling pathways, including the β-catenin-independent Wnt pathway and the DKK1/CKAP4 pathway, the inhibition of DKK1 to propagate Wnt/β-catenin signals has been validated as an effective way to treat related diseases. In fact, strategies for developing DKK1 inhibitors have produced encouraging clinical results in different pathological models, and many publications provide detailed information about these inhibitors, which include small molecules, antibodies, and nucleic acids, and may function at the protein or mRNA level. However, no systematic review has yet provided an overview of the various aspects of their development and prospects. Therefore, we review the DKK1 inhibitors currently available or under study and provide an outlook on future studies involving DKK1 and drug discovery.
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Affiliation(s)
- Hewen Jiang
- School of Chinese Medicine, Chinese University of Hong Kong, Hong Kong, China.,Guangdong-Hong Kong Macao Greater Bay Area International Research Platform for Aptamer-Based Translational Medicine and Drug Discovery, Hong Kong, China
| | - Zongkang Zhang
- School of Chinese Medicine, Chinese University of Hong Kong, Hong Kong, China.,Guangdong-Hong Kong Macao Greater Bay Area International Research Platform for Aptamer-Based Translational Medicine and Drug Discovery, Hong Kong, China
| | - Yuanyuan Yu
- Guangdong-Hong Kong Macao Greater Bay Area International Research Platform for Aptamer-Based Translational Medicine and Drug Discovery, Hong Kong, China.,Law Sau Fai Institute for Advancing Translational Medicine in Bone and Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Integrated Bioinformedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Hang Yin Chu
- School of Chinese Medicine, Chinese University of Hong Kong, Hong Kong, China.,Guangdong-Hong Kong Macao Greater Bay Area International Research Platform for Aptamer-Based Translational Medicine and Drug Discovery, Hong Kong, China
| | - Sifan Yu
- Guangdong-Hong Kong Macao Greater Bay Area International Research Platform for Aptamer-Based Translational Medicine and Drug Discovery, Hong Kong, China.,Law Sau Fai Institute for Advancing Translational Medicine in Bone and Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Integrated Bioinformedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Shanshan Yao
- School of Chinese Medicine, Chinese University of Hong Kong, Hong Kong, China.,Guangdong-Hong Kong Macao Greater Bay Area International Research Platform for Aptamer-Based Translational Medicine and Drug Discovery, Hong Kong, China
| | - Ge Zhang
- Guangdong-Hong Kong Macao Greater Bay Area International Research Platform for Aptamer-Based Translational Medicine and Drug Discovery, Hong Kong, China.,Law Sau Fai Institute for Advancing Translational Medicine in Bone and Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Institute of Integrated Bioinformedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Bao-Ting Zhang
- School of Chinese Medicine, Chinese University of Hong Kong, Hong Kong, China.,Guangdong-Hong Kong Macao Greater Bay Area International Research Platform for Aptamer-Based Translational Medicine and Drug Discovery, Hong Kong, China
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4
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Zhang Q, Gong W, Wu H, Wang J, Jin Q, Lin C, Xu S, Bao W, Wang Y, Wu J, Feng S, Zhao C, Chen B, Liu Z. DKK1 suppresses WWP2 to enhance bortezomib resistance in multiple myeloma via regulating GLI2 ubiquitination. Carcinogenesis 2021; 42:1223-1231. [PMID: 34546340 DOI: 10.1093/carcin/bgab086] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 08/13/2021] [Accepted: 09/17/2021] [Indexed: 11/14/2022] Open
Abstract
Bortezomib-based chemotherapy represents the most prevalent regimens for multiple myeloma (MM), whereas acquired drug resistance remains a major obstacle. Myeloma cells often produce excessive amount of dickkopf-1 (DKK1), giving rise to myeloma bone disease. However, it remains obscure about the effects and mechanisms of DKK1 in the progression and bortezomib responsiveness of MM cells. In the current study, we found WWP2, an E3 ubiquitin-protein ligase, was downregulated in the bortezomib-resistant cells along with high expression of DKK1. Further investigation revealed that WWP2 was a direct target of Wnt/β-catenin signaling pathway, and DKK1 suppressed the expression of WWP2 via canonical Wnt signaling. We further identified that WWP2 mediated the ubiquitination and degradation of GLI2, a main transcriptional factor of the Hedgehog (Hh) pathway. Therefore, DKK1-induced WWP2 downregulation improved GLI2 stability and activation of Hh signaling pathway, contributing to the resistance to bortezomib of MM cells. Clinical data also validated that WWP2 expression was associated with the treatment response and clinic outcomes of MM patients. WWP2 overexpression restricted MM progression and enhanced cell sensitivity to bortezomib treatment in vitro and in vivo. Taken together, our findings demonstrate that DKK1 facilitates the generation of bortezomib resistance in MM via downregulating WWP2 and activating Hh pathway. Thus, the manipulation of DKK1-WWP2-GLI2 axis might sensitize myeloma cells to proteasome inhibitors.
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Affiliation(s)
- Qiguo Zhang
- Department of Hematology, Nanjing Drum Tower Hospital, Nanjing University, Nanjing, Jiangsu, China.,Department of Hematology, Chuzhou First People's Hospital of Anhui Medical University, Chuzhou, Anhui
| | - Wenyu Gong
- Department of Hematology, Chuzhou First People's Hospital of Anhui Medical University, Chuzhou, Anhui
| | - Hongyan Wu
- Department of Pathology, Nanjing Drum Tower Hospital, Nanjing University, Nanjing, Jiangsu, China
| | - Jing Wang
- Department of Hematology, Nanjing Drum Tower Hospital, Nanjing University, Nanjing, Jiangsu, China
| | - Qichuan Jin
- Department of Hematology, Chuzhou First People's Hospital of Anhui Medical University, Chuzhou, Anhui
| | - Chun Lin
- Department of Hematology, Chuzhou First People's Hospital of Anhui Medical University, Chuzhou, Anhui
| | - Shiyun Xu
- Department of Hematology, Chuzhou First People's Hospital of Anhui Medical University, Chuzhou, Anhui
| | - Wenqiang Bao
- Department of Hematology, Chuzhou First People's Hospital of Anhui Medical University, Chuzhou, Anhui
| | - Yin Wang
- Department of Hematology, Chuzhou First People's Hospital of Anhui Medical University, Chuzhou, Anhui
| | - Jing Wu
- Department of Hematology, Chuzhou First People's Hospital of Anhui Medical University, Chuzhou, Anhui
| | - Shanshan Feng
- Department of Hematology, Chuzhou First People's Hospital of Anhui Medical University, Chuzhou, Anhui
| | - Changzhi Zhao
- Department of Hematology, Chuzhou First People's Hospital of Anhui Medical University, Chuzhou, Anhui
| | - Bing Chen
- Department of Hematology, Nanjing Drum Tower Hospital, Nanjing University, Nanjing, Jiangsu, China
| | - Zhiqiang Liu
- Department of Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
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Management of Adverse Events and Supportive Therapy in Relapsed/Refractory Multiple Myeloma. Cancers (Basel) 2021; 13:cancers13194978. [PMID: 34638462 PMCID: PMC8508369 DOI: 10.3390/cancers13194978] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 02/01/2023] Open
Abstract
Simple Summary Multiple myeloma (MM) patients with relapsing and/or refractory (RR) disease are exposed for a prolonged time to multiple drugs, which increase the risk of toxicity. In addition to tumor response, preserving the quality of life represents an important goal for this patient population. Therefore, supportive therapy plays a pivotal role in their treatment by limiting disease- and drug-related complications. The aim of this review is to outline current standards and future strategies to prevent and treat renal insufficiency, anemia, bone disease, and infection, including COVID-19, in RRMM patients. In addition, the incidence and treatment of side effects of novel anti-MM agents will be discussed. Abstract Relapsed/refractory (RR) multiple myeloma (MM) patients are a fragile population because of prolonged drug exposure and advanced age. Preserving a good quality of life is of high priority for these patients and the treatment of disease- and treatment-related complications plays a key role in their management. By preventing and limiting MM-induced complications, supportive care improves patients’ outcome. Erythropoietin-stimulating agents and bisphosphonates are well-established supportive strategies, yet novel agents are under investigation, such as anabolic bone agents and activin receptor-like kinase (ALK) inhibitors. The recent dramatic changes in the treatment landscape of MM pose an additional challenge for the routine care of RRMM patients. Multidrug combinations in first and later lines increase the risk for long-lasting toxicities, including adverse cardiovascular and neurological events. Moreover, recently approved first-in-class drugs have unique side-effect profiles, such as ocular toxicity of belantamab mafodotin or gastrointestinal toxicity of selinexor. This review discusses current standards in supportive treatment of RRMM patients, including recommendations in light of the recent SARS-CoV-19 pandemic, and critically looks at the incidence and management of side effects of standard as well as next generation anti-MM agents.
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Dickkopf Proteins and Their Role in Cancer: A Family of Wnt Antagonists with a Dual Role. Pharmaceuticals (Basel) 2021; 14:ph14080810. [PMID: 34451907 PMCID: PMC8400703 DOI: 10.3390/ph14080810] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/10/2021] [Accepted: 08/14/2021] [Indexed: 12/29/2022] Open
Abstract
The Wnt signaling pathway regulates crucial aspects such as cell fate determination, cell polarity and organogenesis during embryonic development. Wnt pathway deregulation is a hallmark of several cancers such as lung, gastric and liver cancer, and has been reported to be altered in others. Despite the general agreement reached by the scientific community on the oncogenic potential of the central components of the pathway, the role of the antagonist proteins remains less clear. Deregulation of the pathway may be caused by overexpression or downregulation of a wide range of antagonist proteins. Although there is growing information related to function and regulation of Dickkopf (DKK) proteins, their pharmacological potential as cancer therapeutics still has not been fully developed. This review provides an update on the role of DKK proteins in cancer and possible potential as therapeutic targets for the treatment of cancer; available compounds in pre-clinical or clinical trials are also reviewed.
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Belachew AA, Wu X, Callender R, Waller R, Orlowski RZ, Vachon CM, Camp NJ, Ziv E, Hildebrandt MAT. Genetic determinants of multiple myeloma risk within the Wnt/beta-catenin signaling pathway. Cancer Epidemiol 2021; 73:101972. [PMID: 34216957 DOI: 10.1016/j.canep.2021.101972] [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: 03/17/2021] [Revised: 06/17/2021] [Accepted: 06/20/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Aberrant Wnt/beta-catenin pathway activation is implicated in Multiple Myeloma (MM) development, but little is known if genetic variants within this pathway contribute to MM susceptibility. METHODS We performed a discovery candidate pathway analysis in 269 non-Hispanic white MM cases and 272 controls focusing on 171 variants selected from 26 core genes within the Wnt/beta-catenin pathway. Significant candidate variants (P < 0.05) were selected for validation in internal and external non-Hispanic white populations totaling 818 cases and 1209 controls. We also examined significant variants in non-Hispanic black and Hispanic case/control study populations to identify potential differences by race/ethnicity. Possible biological functions of candidate variants were predicted in silico. RESULTS Seven variants were significantly associated with MM risk in non-Hispanic whites in the discovery population, of which LRP6:rs7966410 (OR: 0.57; 95 % CI: 0.38-0.88; P = 9.90 × 10-3) and LRP6:rs7956971 (OR: 0.64; 95 % CI: 0.44-0.95; P = 0.027) remained significant in the internal and external populations. CSNK1D:rs9901910 replicated among all three racial/ethnic groups, with 2-6 fold increased risk of MM (OR: 2.40; 95 % CI: 1.67-3.45; P = 2.43 × 10-6 - non-Hispanic white; OR: 6.42; 95 % CI: 2.47-16.7; P = 3.14 × 10-4 - non-Hispanic black; OR: 4.31; 95 % CI: 1.83-10.1; P = 8.10 × 10-4 - Hispanic). BTRC:rs7916830 was associated with a significant 37 % and 24 % reduced risk of MM in the non-Hispanic white (95 % CI: 0.49-0.82; P = 5.60 × 10-4) and non-Hispanic Black (95 % CI: 0.60-0.97; P = 0.028) population, respectively. In silico tools predicted that these loci altered function through via gene regulation. CONCLUSION We identified several variants within the Wnt/beta-catenin pathway associated with MM susceptibility. Findings of this study highlight the potential genetic role of Wnt/beta-catenin signaling in MM etiology among a diverse patient population.
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Affiliation(s)
- Alem A Belachew
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, United States
| | - Xifeng Wu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, United States
| | - Rashida Callender
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, United States
| | - Rosalie Waller
- Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT, 84108, United States
| | - Robert Z Orlowski
- Department of Lymphoma/Myeloma, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, United States
| | - Celine M Vachon
- Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, 55902, United States
| | - Nicola J Camp
- Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT, 84108, United States
| | - Elad Ziv
- Department of Medicine, Division of General Internal Medicine, Institute for Human Genetics, Helen Diller Family Comprehensive Cancer Center, University of California-San Francisco, San Francisco, CA, 94143, United States
| | - Michelle A T Hildebrandt
- Department of Lymphoma/Myeloma, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, United States.
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Chu HY, Chen Z, Wang L, Zhang ZK, Tan X, Liu S, Zhang BT, Lu A, Yu Y, Zhang G. Dickkopf-1: A Promising Target for Cancer Immunotherapy. Front Immunol 2021; 12:658097. [PMID: 34093545 PMCID: PMC8174842 DOI: 10.3389/fimmu.2021.658097] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 05/04/2021] [Indexed: 01/15/2023] Open
Abstract
Clinical studies in a range of cancers have detected elevated levels of the Wnt antagonist Dickkopf-1 (DKK1) in the serum or tumors of patients, and this was frequently associated with a poor prognosis. Our analysis of DKK1 gene profile using data from TCGA also proves the high expression of DKK1 in 14 types of cancers. Numerous preclinical studies have demonstrated the cancer-promoting effects of DKK1 in both in vitro cell models and in vivo animal models. Furthermore, DKK1 showed the ability to modulate immune cell activities as well as the immunosuppressive cancer microenvironment. Expression level of DKK1 is positively correlated with infiltrating levels of myeloid-derived suppressor cells (MDSCs) in 20 types of cancers, while negatively associated with CD8+ T cells in 4 of these 20 cancer types. Emerging experimental evidence indicates that DKK1 has been involved in T cell differentiation and induction of cancer evasion of immune surveillance by accumulating MDSCs. Consequently, DKK1 has become a promising target for cancer immunotherapy, and the mechanisms of DKK1 affecting cancers and immune cells have received great attention. This review introduces the rapidly growing body of literature revealing the cancer-promoting and immune regulatory activities of DKK1. In addition, this review also predicts that by understanding the interaction between different domains of DKK1 through computational modeling and functional studies, the underlying functional mechanism of DKK1 could be further elucidated, thus facilitating the development of anti-DKK1 drugs with more promising efficacy in cancer immunotherapy.
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Affiliation(s)
- Hang Yin Chu
- Law Sau Fai Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Guangdong-Hong Kong-Macao Greater Bay Area International Research Platform for Aptamer-based Translational Medicine and Drug Discovery, Hong Kong, China
| | - Zihao Chen
- Guangdong-Hong Kong-Macao Greater Bay Area International Research Platform for Aptamer-based Translational Medicine and Drug Discovery, Hong Kong, China.,School of Chinese Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Luyao Wang
- Law Sau Fai Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Guangdong-Hong Kong-Macao Greater Bay Area International Research Platform for Aptamer-based Translational Medicine and Drug Discovery, Hong Kong, China
| | - Zong-Kang Zhang
- Guangdong-Hong Kong-Macao Greater Bay Area International Research Platform for Aptamer-based Translational Medicine and Drug Discovery, Hong Kong, China.,School of Chinese Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Xinhuan Tan
- Department of Microsurgery (II), Wendeng Hospital of Traditional Chinese Orthopedics and Traumatology of Shandong Province, Wendeng, China
| | - Shuangshuang Liu
- Department of Microsurgery (II), Wendeng Hospital of Traditional Chinese Orthopedics and Traumatology of Shandong Province, Wendeng, China
| | - Bao-Ting Zhang
- Guangdong-Hong Kong-Macao Greater Bay Area International Research Platform for Aptamer-based Translational Medicine and Drug Discovery, Hong Kong, China.,School of Chinese Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Aiping Lu
- Law Sau Fai Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Guangdong-Hong Kong-Macao Greater Bay Area International Research Platform for Aptamer-based Translational Medicine and Drug Discovery, Hong Kong, China
| | - Yuanyuan Yu
- Law Sau Fai Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Guangdong-Hong Kong-Macao Greater Bay Area International Research Platform for Aptamer-based Translational Medicine and Drug Discovery, Hong Kong, China
| | - Ge Zhang
- Law Sau Fai Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Guangdong-Hong Kong-Macao Greater Bay Area International Research Platform for Aptamer-based Translational Medicine and Drug Discovery, Hong Kong, China
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9
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Validation of a DKK1 RNAscope chromogenic in situ hybridization assay for gastric and gastroesophageal junction adenocarcinoma tumors. Sci Rep 2021; 11:9920. [PMID: 33972574 PMCID: PMC8110580 DOI: 10.1038/s41598-021-89060-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 04/19/2021] [Indexed: 12/27/2022] Open
Abstract
Dickkopf-1 (DKK1) is a secreted modulator of Wnt signaling that is frequently overexpressed in tumors and associated with poor clinical outcomes. DKN-01 is a humanized monoclonal therapeutic antibody that binds DKK1 with high affinity and has demonstrated clinical activity in gastric/gastroesophageal junction (G/GEJ) patients with elevated tumoral expression of DKK1. Here we report on the validation of a DKK1 RNAscope chromogenic in situ hybridization assay to assess DKK1 expression in G/GEJ tumor tissue. To reduce pathologist time, potential pathologist variability from manual scoring and support pathologist decision making, a digital image analysis algorithm that identifies tumor cells and quantifies the DKK1 signal was developed. Following CLIA guidelines the DKK1 RNAscope chromogenic in situ hybridization assay and digital image analysis algorithm were successfully validated for sensitivity, specificity, accuracy, and precision. The DKK1 RNAscope assay in conjunction with the digital image analysis solution is acceptable for prospective screening of G/GEJ adenocarcinoma patients. The work described here will further advance the companion diagnostic development of our DKK1 RNAscope assay and could generally be used as a guide for the validation of RNAscope assays with digital image quantification.
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10
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Lehmann J, Thiele S, Baschant U, Rachner TD, Niehrs C, Hofbauer LC, Rauner M. Mice lacking DKK1 in T cells exhibit high bone mass and are protected from estrogen-deficiency-induced bone loss. iScience 2021; 24:102224. [PMID: 33748710 PMCID: PMC7961106 DOI: 10.1016/j.isci.2021.102224] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 01/16/2021] [Accepted: 02/19/2021] [Indexed: 12/17/2022] Open
Abstract
The Wnt inhibitor Dickkopf-1 (DKK1) is a negative regulator of bone formation and bone mass and is dysregulated in various bone diseases. How DKK1 contributes to postmenopausal osteoporosis, however, remains poorly understood. Here, we show that mice lacking DKK1 in T cells are protected from ovariectomy-induced bone loss. Ovariectomy activated CD4+ and CD8+ T cells and increased their production of DKK1. Co-culture of activated T cells with osteoblasts inhibited Wnt signaling in osteoblasts, leading to impaired differentiation. Importantly, DKK1 expression in T cells also controlled physiological bone remodeling. T-cell-deficient Dkk1 knock-out mice had a higher bone mass with an increased bone formation rate and decreased numbers of osteoclasts compared with controls, a phenotype that was rescued by adoptive transfer of wild-type T cells. Thus, these findings highlight that T cells control bone remodeling in health and disease via their expression of DKK1.
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Affiliation(s)
- Juliane Lehmann
- Department of Medicine III, Division of Endocrinology, Diabetes and Bone Diseases, Technische Universität Dresden, Dresden 01307, Germany.,Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Sylvia Thiele
- Department of Medicine III, Division of Endocrinology, Diabetes and Bone Diseases, Technische Universität Dresden, Dresden 01307, Germany.,Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Ulrike Baschant
- Department of Medicine III, Division of Endocrinology, Diabetes and Bone Diseases, Technische Universität Dresden, Dresden 01307, Germany.,Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Tilman D Rachner
- Department of Medicine III, Division of Endocrinology, Diabetes and Bone Diseases, Technische Universität Dresden, Dresden 01307, Germany.,Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Christof Niehrs
- Division of Molecular Embryology, DKFZ-ZMBH Alliance, Heidelberg, Germany.,Institute of Molecular Biology, Mainz, Germany
| | - Lorenz C Hofbauer
- Department of Medicine III, Division of Endocrinology, Diabetes and Bone Diseases, Technische Universität Dresden, Dresden 01307, Germany.,Center for Regenerative Therapies Dresden, Technische Universität Dresden, Dresden, Germany
| | - Martina Rauner
- Department of Medicine III, Division of Endocrinology, Diabetes and Bone Diseases, Technische Universität Dresden, Dresden 01307, Germany.,Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
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11
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Hughes AM, Kolb AD, Shupp AB, Shine KM, Bussard KM. Printing the Pathway Forward in Bone Metastatic Cancer Research: Applications of 3D Engineered Models and Bioprinted Scaffolds to Recapitulate the Bone-Tumor Niche. Cancers (Basel) 2021; 13:507. [PMID: 33572757 PMCID: PMC7865550 DOI: 10.3390/cancers13030507] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/23/2021] [Accepted: 01/25/2021] [Indexed: 12/14/2022] Open
Abstract
Breast cancer commonly metastasizes to bone, resulting in osteolytic lesions and poor patient quality of life. The bone extracellular matrix (ECM) plays a critical role in cancer cell metastasis by means of the physical and biochemical cues it provides to support cellular crosstalk. Current two-dimensional in-vitro models lack the spatial and biochemical complexities of the native ECM and do not fully recapitulate crosstalk that occurs between the tumor and endogenous stromal cells. Engineered models such as bone-on-a-chip, extramedullary bone, and bioreactors are presently used to model cellular crosstalk and bone-tumor cell interactions, but fall short of providing a bone-biomimetic microenvironment. Three-dimensional bioprinting allows for the deposition of biocompatible materials and living cells in complex architectures, as well as provides a means to better replicate biological tissue niches in-vitro. In cancer research specifically, 3D constructs have been instrumental in seminal work modeling cancer cell dissemination to bone and bone-tumor cell crosstalk in the skeleton. Furthermore, the use of biocompatible materials, such as hydroxyapatite, allows for printing of bone-like microenvironments with the ability to be implanted and studied in in-vivo animal models. Moreover, the use of bioprinted models could drive the development of novel cancer therapies and drug delivery vehicles.
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Affiliation(s)
- Anne M. Hughes
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA;
| | - Alexus D. Kolb
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA; (A.D.K.); (A.B.S.)
| | - Alison B. Shupp
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA; (A.D.K.); (A.B.S.)
| | - Kristy M. Shine
- Health Design Lab, Jefferson Bioprinting Lab, Department of Emergency Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Karen M. Bussard
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA; (A.D.K.); (A.B.S.)
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12
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Xu Y, Guo J, Liu J, Xie Y, Li X, Jiang H, Wang J, Peng Z, Wang J, Wang S, Wan C, Chen L, Zhong Y, Liu B, Liu Z. Hypoxia-induced CREB cooperates MMSET to modify chromatin and promote DKK1 expression in multiple myeloma. Oncogene 2021; 40:1231-1241. [PMID: 33420361 PMCID: PMC7892339 DOI: 10.1038/s41388-020-01590-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 11/17/2020] [Accepted: 11/26/2020] [Indexed: 12/20/2022]
Abstract
Myeloma cells produce excessive levels of dickkopf-1 (DKK1), which mediates the inhibition of Wnt signaling in osteoblasts, leading to multiple myeloma (MM) bone disease. Nevertheless, the precise mechanisms underlying DKK1 overexpression in myeloma remain incompletely understood. Herein, we provide evidence that hypoxia promotes DKK1 expression in myeloma cells. Under hypoxic conditions, p38 kinase phosphorylated cAMP-responsive element-binding protein (CREB) and drove its nuclear import to activate DKK1 transcription. In addition, high levels of DKK1 were associated with the presence of focal bone lesions in patients with t(4;14) MM, overexpressing the histone methyltransferase MMSET, which was identified as a downstream target gene of hypoxia-inducible factor (HIF)-1α. Furthermore, we found that CREB could recruit MMSET, leading to the stabilization of HIF-1α protein and the increased dimethylation of histone H3 at lysine 36 on the DKK1 promoter. Knockdown of CREB in myeloma cells alleviated the suppression of osteoblastogenesis by myeloma-secreted DKK1 in vitro. Combined treatment with a CREB inhibitor and the hypoxia-activated prodrug TH-302 (evofosfamide) significantly reduced MM-induced bone destruction in vivo. Taken together, our findings reveal that hypoxia and a cytogenetic abnormality regulate DKK1 expression in myeloma cells, and provide an additional rationale for the development of therapeutic strategies that interrupt DKK1 to cure MM.
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Affiliation(s)
- Yinyin Xu
- Clinical Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, China.,Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing, China
| | - Jing Guo
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Jing Liu
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Ying Xie
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Xin Li
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Hongmei Jiang
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Jingjing Wang
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Ziyi Peng
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Jingya Wang
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Sheng Wang
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Chao Wan
- Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing, China
| | - Lanting Chen
- Department of Hematology, Yongchuan Hospital of Chongqing Medical University, Chongqing, China
| | - Yuping Zhong
- Department of Hematology, Qingdao Municipal Hospital, Qingdao, Shandong, China
| | - Beizhong Liu
- Clinical Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, China. .,Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing, China.
| | - Zhiqiang Liu
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China. .,Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin, China.
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13
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Gronbach M, Mitrach F, Lidzba V, Müller B, Möller S, Rother S, Salbach-Hirsch J, Hofbauer LC, Schnabelrauch M, Hintze V, Hacker MC, Schulz-Siegmund M. Scavenging of Dickkopf-1 by macromer-based biomaterials covalently decorated with sulfated hyaluronan displays pro-osteogenic effects. Acta Biomater 2020; 114:76-89. [PMID: 32673749 DOI: 10.1016/j.actbio.2020.07.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/18/2020] [Accepted: 07/08/2020] [Indexed: 12/27/2022]
Abstract
Dickkopf-1 (DKK1), a Wnt inhibitor secreted by bone marrow stromal cells (MSC), is known to play an important role in long-term non-union bone fracture defects and glucocorticoid induced osteoporosis. Mitigating its effects in early bone defects could improve osteogenesis and bone defect healing. Here, we applied a biomaterial strategy to deplete a defect environment from DKK1 by scavenging the protein via a macromer-based biomaterial covalently decorated with sulfated hyaluronan (sHA3). The material consisted of cross-copolymerized three-armed macromers with a small anchor molecule. Using the glycidyl anchor, polyetheramine (ED900) could be grafted to the material to which sHA3 was efficiently coupled in a separate step. For thorough investigation of material modification, flat material surfaces were generated by fabricating them on glass discs. The binding capability of sHA3 for DKK1 was demonstrated in this study by surface plasmon resonance measurements. Furthermore, the surfaces demonstrated the ability to scavenge and inactivate pathologic amounts of DKK1 from complex media. In a combinatory approach with Wnt3a, we were able to demonstrate that DKK1 is the preferred binding partner of our sHA3-functionalized surfaces. We validated our findings in a complex in vitro setting of differentiating SaOS-2 cells and primary hMSC. Here, endogenous DKK-1 was scavenged resulting in increased osteogenic differentiation indicating that this is a consistent biological effect irrespective of the model system used. Our study provides insights in the mechanisms and efficiency of sHA3 surface functionalization for DKK1 scavenging, which may be used in a clinical context in the future.
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Affiliation(s)
- M Gronbach
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany
| | - F Mitrach
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany
| | - V Lidzba
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany
| | - B Müller
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany
| | - S Möller
- INNOVENT e.V., Biomaterials Department, Pruessingstraße 27B, Jena, Germany
| | - S Rother
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, 01062 Dresden, Germany
| | - J Salbach-Hirsch
- Department of Medicine III, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany
| | - L C Hofbauer
- Department of Medicine III, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany; Center for Healthy Aging, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany
| | - M Schnabelrauch
- INNOVENT e.V., Biomaterials Department, Pruessingstraße 27B, Jena, Germany
| | - V Hintze
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, 01062 Dresden, Germany
| | - M C Hacker
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany
| | - M Schulz-Siegmund
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany.
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14
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Jaschke N, Hofbauer LC, Göbel A, Rachner TD. Evolving functions of Dickkopf-1 in cancer and immunity. Cancer Lett 2020; 482:1-7. [PMID: 32251706 DOI: 10.1016/j.canlet.2020.03.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/23/2020] [Accepted: 03/31/2020] [Indexed: 12/17/2022]
Abstract
Dickkopf-1 (DKK-1) is a well-established inhibitor of canonical Wnt-signaling that critically participates in the regulation of bone formation and has been implicated in the development and progression of bone metastases. While the skeleton was originally considered the sole site of DKK-1 synthesis, it has now become clear that the molecule is also highly expressed in T-cells, platelets and multiple cancer cells. In the past years, several new functions of DKK-1 in angiogenesis, cancer cell biology, immune homeostasis and inflammation have been revealed. These novel insights have paved the way for clinical trials investigating the efficacy of anti-DKK-1 antibodies in a variety of different malignancies, most of which are currently still ongoing. In this review, we discuss the evolution and recent advances in DKK-1 research and highlight clinical implications of the available knowledge on the molecule, especially in cancer. Finally, we emphasize outstanding questions and provide an outlook on potential future studies that will aid in further improving our understanding of the pleiotropic roles of DKK-1 in health and disease.
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Affiliation(s)
- Nikolai Jaschke
- Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Ageing, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Department of Internal Medicine I, Gastroenterology, Hepatology, Endocrinology and Metabolism, Medical University of Innsbruck, Austria
| | - Lorenz C Hofbauer
- Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Ageing, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Andy Göbel
- Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Ageing, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Tilman D Rachner
- Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; Center for Healthy Ageing, Department of Medicine III, Technische Universität Dresden, Dresden, Germany; German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany.
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15
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Marino S, Petrusca DN, Roodman GD. Therapeutic targets in myeloma bone disease. Br J Pharmacol 2020; 178:1907-1922. [PMID: 31647573 DOI: 10.1111/bph.14889] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 09/09/2019] [Accepted: 09/17/2019] [Indexed: 12/13/2022] Open
Abstract
Multiple myeloma (MM) is the second most common haematological malignancy and is characterized by a clonal proliferation of neoplastic plasma cells within the bone marrow. MM is the most frequent cancer involving the skeleton, causing osteolytic lesions, bone pain and pathological fractures that dramatically decrease MM patients' quality of life and survival. MM bone disease (MBD) results from uncoupling of bone remodelling in which excessive bone resorption is not compensated by new bone formation, due to a persistent suppression of osteoblast activity. Current management of MBD includes antiresorptive agents, bisphosphonates and denosumab, that are only partially effective due to their inability to repair the existing lesions. Thus, research into agents that prevent bone destruction and more importantly repair existing lesions by inducing new bone formation is essential. This review discusses the mechanisms regulating the uncoupled bone remodelling in MM and summarizes current advances in the treatment of MBD. LINKED ARTICLES: This article is part of a themed issue on The molecular pharmacology of bone and cancer-related bone diseases. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v178.9/issuetoc.
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Affiliation(s)
- Silvia Marino
- Department of Medicine, Division Hematology/Oncology, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Daniela N Petrusca
- Department of Medicine, Division Hematology/Oncology, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - G David Roodman
- Department of Medicine, Division Hematology/Oncology, Indiana University School of Medicine, Indianapolis, Indiana, USA.,Roudebush VA Medical Center, Indianapolis, Indiana, USA
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16
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Morris EV, Edwards CM. Bone marrow adiposity and multiple myeloma. Bone 2019; 118:42-46. [PMID: 29548987 DOI: 10.1016/j.bone.2018.03.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 03/12/2018] [Accepted: 03/12/2018] [Indexed: 11/30/2022]
Abstract
Multiple Myeloma (MM) is an incurable haematological malignancy and is the second most common blood cancer in adults; it is caused by the clonal expansion of abnormal plasma cells within the bone marrow and characterized by osteolytic bone lesions, bone pain, renal disease, and immunodeficiency. MM cells infiltrate the bone marrow where they hijack the microenvironment to sustain growth and survival. The contribution to this process by resident bone cells is well defined. However, the role of bone marrow adipocytes is less clear. As one of the most abundant cell types in the bone marrow these cells are surprisingly understudied. However, in the last few decades they have been recognised as having endocrine function. Adipocytes are metabolically active cells that secrete adipokines, growth factors, and inflammatory mediators, they influence the behaviour and function of neighbouring cells; and have the potential to dysregulate normal bone homeostasis. This review discusses how adipocytes contribute to the metastatic niche in multiple myeloma and cancers that metastasise to the bone and how these new discoveries may contribute to further understanding the mechanisms driving the devastating bone disease associated with MM.
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Affiliation(s)
- Emma V Morris
- Nuffield Dept. of Surgical Sciences, University of Oxford, Oxford, UK
| | - Claire M Edwards
- Nuffield Dept. of Surgical Sciences, University of Oxford, Oxford, UK; Nuffield Dept. of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK.
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17
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Malaei F, Rasaee MJ, Paknejad M, Latifi AM, Rahbarizadeh F. Production and Characterization of Monoclonal and Polyclonal Antibodies Against Truncated Recombinant Dickkopf-1 as a Candidate Biomarker. Monoclon Antib Immunodiagn Immunother 2018; 37:257-264. [PMID: 30592704 DOI: 10.1089/mab.2018.0029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Several studies have reported an increased serum level of Dickkopf (DKK-1) protein in a variety of cancers, including multiple myeloma, lung, colorectal, bone loss, and Alzheimer's disease. This protein has potential to be used as a biomarker for the diagnosis of some cancers, especially bone loss in multiple myeloma. In the present study, to measure the concentration level of DKK-1 protein, rabbit polyclonal antibody (pAb) and mouse monoclonal antibodies (mAbs) were produced against this protein. New Zealand white rabbits and BALB/c mice were immunized with the chimeric recombinant DKK-1 antigen. Immunized mouse spleen cells were fused with SP2/0 cells to generate anti-rDKK-1 antibody-producing hybridoma cells. Antibodies were purified by protein A affinity chromatography and assessed using sodium dodecyl sulfate polyacrylamide gel, western blotting and enzyme-linked immunosorbent assay. These results implied that the pAb and mAb were produced against the DKK-1 protein. The Kd value of 5 × 10-9 M was recorded for the mAb MR6F3 toward native DKK-1, and the Ig isotype was identified as IgG2b. No cross-reactivity was shown with DKK-2 by MR6F3. Collectively, our results revealed that the produced pAb and mAb could be used in the measurement of DKK-1 protein.
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Affiliation(s)
- Fatemeh Malaei
- 1 Department of Medical Biotechnology, Faculty of Medical Sciences, Tarbiat Modares University , Tehran, Iran
| | - Mohammad Javad Rasaee
- 1 Department of Medical Biotechnology, Faculty of Medical Sciences, Tarbiat Modares University , Tehran, Iran
| | - Maliheh Paknejad
- 2 Department of Medical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences , Tehran, Iran
| | - Ali Mohammad Latifi
- 3 Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences , Tehran, Iran
| | - Fatemeh Rahbarizadeh
- 1 Department of Medical Biotechnology, Faculty of Medical Sciences, Tarbiat Modares University , Tehran, Iran
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18
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Myeloma Bone Disease: Update on Pathogenesis and Novel Treatment Strategies. Pharmaceutics 2018; 10:pharmaceutics10040202. [PMID: 30355994 PMCID: PMC6321035 DOI: 10.3390/pharmaceutics10040202] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 10/15/2018] [Accepted: 10/20/2018] [Indexed: 01/31/2023] Open
Abstract
Bone disease, including osteolytic lesions and/or osteoporosis, is a common feature of multiple myeloma (MM). The consequences of skeletal involvement are severe pain, spinal cord compressions, and bone fractures, which have a dramatic impact on patients’ quality of life and, ultimately, survival. During the past few years, several landmark studies significantly enhanced our insight into MM bone disease (MBD) by identifying molecular mechanisms leading to increased bone resorption due to osteoclast activation, and decreased bone formation by osteoblast inhibition. Bisphosphonates were the mainstay to prevent skeletal-related events in MM for almost two decades. Excitingly, the most recent approval of the receptor activator of NF-kappa B ligand (RANKL) inhibitor, denosumab, expanded treatment options for MBD, for patients with compromised renal function, in particular. In addition, several other bone-targeting agents, including bone anabolic drugs, are currently in preclinical and early clinical assessment. This review summarizes our up-to-date knowledge on the pathogenesis of MBD and discusses novel state-of-the-art treatment strategies that are likely to enter clinical practice in the near future.
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19
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Appelman-Dijkstra NM, Papapoulos SE. Clinical advantages and disadvantages of anabolic bone therapies targeting the WNT pathway. Nat Rev Endocrinol 2018; 14:605-623. [PMID: 30181608 DOI: 10.1038/s41574-018-0087-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The WNT signalling pathway is a key regulator of bone metabolism, particularly bone formation, which has helped to define the role of osteocytes - the most abundant bone cells - as orchestrators of bone remodelling. Several molecules involved in the control of the WNT signalling pathway have been identified as potential targets for the development of bone-building therapeutics for patients with osteoporosis. Several of these molecules have been investigated in animal models, but only inhibitors of sclerostin (which is produced by osteocytes) have been investigated in phase III clinical studies. Here, we review the rationale for these developments and the specificity and potential off-target actions of WNT-based therapeutics. We also describe the available preclinical and clinical studies and discuss the benefits and risks of using sclerostin inhibitors for the management of patients with osteoporosis.
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20
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Ming Z, Wang Y, Gong AY, Zhang XT, Li M, Chen T, Mathy NW, Strauss-Soukup JK, Chen XM. Attenuation of Intestinal Epithelial Cell Migration During Cryptosporidium parvum Infection Involves Parasite Cdg7_FLc_1030 RNA-Mediated Induction and Release of Dickkopf-1. J Infect Dis 2018; 218:1336-1347. [PMID: 30052999 PMCID: PMC6129111 DOI: 10.1093/infdis/jiy299] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 05/31/2018] [Indexed: 12/17/2022] Open
Abstract
Intestinal infection by Cryptosporidium is known to cause epithelial cell migration disorder but the underlying mechanisms are unclear. Previous studies demonstrated that a panel of parasite RNA transcripts of low protein-coding potential are delivered into infected epithelial cells. Using multiple models of intestinal cryptosporidiosis, we report here that C. parvum infection induces expression and release of the dickkopf protein 1 (Dkk1) from intestinal epithelial cells. Delivery of parasite Cdg7_FLc_1030 RNA to intestinal epithelial cells triggers transactivation of host Dkk1 gene during C. parvum infection. Release of Dkk1 is involved in C. parvum-induced inhibition of cell migration of epithelial cells, including noninfected bystander cells. Moreover, Dkk1-mediated suppression of host cell migration during C. parvum infection involves inhibition of Cdc42/Par6 signaling. Our data support the hypothesis that attenuation of intestinal epithelial cell migration during Cryptosporidium infection involves parasite Cdg7_FLc_1030 RNA-mediated induction and release of Dkk1 from infected cells.
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Affiliation(s)
- Zhenping Ming
- Department of Medical Parasitology, School of Basic Medical Sciences, Wuhan University, Hubei, China
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, Nebraska
| | - Yang Wang
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, Nebraska
| | - Ai-Yu Gong
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, Nebraska
| | - Xin-Tian Zhang
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, Nebraska
| | - Min Li
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, Nebraska
| | - Ting Chen
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, Nebraska
- Department of Gastroenterology, Hubei University of Science and Technology, Hubei, China
| | - Nicholas W Mathy
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, Nebraska
| | | | - Xian-Ming Chen
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, Nebraska
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21
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Shupp AB, Kolb AD, Mukhopadhyay D, Bussard KM. Cancer Metastases to Bone: Concepts, Mechanisms, and Interactions with Bone Osteoblasts. Cancers (Basel) 2018; 10:E182. [PMID: 29867053 PMCID: PMC6025347 DOI: 10.3390/cancers10060182] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/29/2018] [Accepted: 05/31/2018] [Indexed: 12/31/2022] Open
Abstract
The skeleton is a unique structure capable of providing support for the body. Bone resorption and deposition are controlled in a tightly regulated balance between osteoblasts and osteoclasts with no net bone gain or loss. However, under conditions of disease, the balance between bone resorption and deposition is upset. Osteoblasts play an important role in bone homeostasis by depositing new bone osteoid into resorption pits. It is becoming increasingly evident that osteoblasts additionally play key roles in cancer cell dissemination to bone and subsequent metastasis. Our laboratory has evidence that when osteoblasts come into contact with disseminated breast cancer cells, the osteoblasts produce factors that initially reduce breast cancer cell proliferation, yet promote cancer cell survival in bone. Other laboratories have demonstrated that osteoblasts both directly and indirectly contribute to dormant cancer cell reactivation in bone. Moreover, we have demonstrated that osteoblasts undergo an inflammatory stress response in late stages of breast cancer, and produce inflammatory cytokines that are maintenance and survival factors for breast cancer cells and osteoclasts. Advances in understanding interactions between osteoblasts, osteoclasts, and bone metastatic cancer cells will aid in controlling and ultimately preventing cancer cell metastasis to bone.
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Affiliation(s)
- Alison B Shupp
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA.
| | - Alexus D Kolb
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA.
| | - Dimpi Mukhopadhyay
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA.
| | - Karen M Bussard
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA.
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22
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Clines KL, Clines GA. DKK1 and Kremen Expression Predicts the Osteoblastic Response to Bone Metastasis. Transl Oncol 2018; 11:873-882. [PMID: 29772510 PMCID: PMC6051964 DOI: 10.1016/j.tranon.2018.04.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 04/19/2018] [Accepted: 04/24/2018] [Indexed: 12/17/2022] Open
Abstract
Bone metastasis is a complication of advanced breast and prostate cancer. Tumor-secreted Dickkopf homolog 1 (DKK1), an inhibitor of canonical Wnt signaling and osteoblast differentiation, was proposed to regulate the osteoblastic response to metastatic cancer in bone. The objectives of this study were to compare DKK1 expression with the in vivo osteoblastic response in a panel of breast and prostate cancer cell lines, and to discover mechanisms that regulate cancer DKK1 expression. DKK1 expression was highest in MDA-MB-231 and PC3 cells that produce osteolytic lesions, and hence a suppressed osteoblastic response, in animal models of bone metastasis. LnCaP, C4-2B, LuCaP23.1, T47D, ZR-75-1, MCF-7, ARCaP and ARCaPM cancer cells that generate osteoblastic, mixed or no bone lesions had the lowest DKK1 expression. The cell lines with negligible expression, LnCaP, C4-2B and T47D, exhibited methylation of the DKK1 promoter. Canonical Wnt signaling activity was then determined and found in all cell lines tested, even in the MDA-MB-231 and PC3 cell lines despite sizeable amounts of DKK1 protein expression expected to block canonical Wnt signaling. A mechanism of DKK1 resistance in the osteolytic cell lines was investigated and determined to be at least partially due to down-regulation of the DKK1 receptors Kremen1 and Kremen2 in the MDA-MB-231 and PC3 cell lines. Combined DKK1 and Kremen expression in cancer cells may serve as predictive markers of the osteoblastic response of breast and prostate cancer bone metastasis.
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Affiliation(s)
- Katrina L Clines
- Department of Internal Medicine, Division of Metabolism, Endocrinology & Diabetes, University of Michigan, Ann Arbor, MI
| | - Gregory A Clines
- Department of Internal Medicine, Division of Metabolism, Endocrinology & Diabetes, University of Michigan, Ann Arbor, MI; Veterans Affairs Medical Center, Ann Arbor, MI.
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23
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Pehlivan M, Çalışkan C, Yüce Z, Sercan HO. Secreted Wnt antagonists in leukemia: A road yet to be paved. Leuk Res 2018; 69:24-30. [PMID: 29625321 DOI: 10.1016/j.leukres.2018.03.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 02/21/2018] [Accepted: 03/23/2018] [Indexed: 11/20/2022]
Abstract
Wnt signaling has been a topic of research for many years for its diverse and fundamental functions in physiological (such as embryogenesis, organogenesis, proliferation, tissue repair and cellular differentiation) and pathological (carcinogenesis, congenital/genetic diseases, and tissue degeneration) processes. Wnt signaling pathway aberrations are associated with both solid tumors and hematological malignancies. Unregulated Wnt signaling observed in malignancies may be due to a wide spectrum of abnormalities, from mutations in the genes of key players to epigenetic modifications of Wnt antagonists. Of these, Wnt antagonists are gaining significant attention for their potential of being targets for treatment and inhibition of Wnt signaling. In this review, we discuss and summarize the significance of Wnt signaling antagonists in the pathogenesis and treatment of hematological malignancies.
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Affiliation(s)
- Melek Pehlivan
- Vocational School of Health Services, Izmir Katip Celebi University, Izmir, Turkey.
| | - Ceyda Çalışkan
- Izmir Institute of Technology, Faculty of Science, Department of Molecular Biology & Genetics, Izmir, Turkey.
| | - Zeynep Yüce
- Dokuz Eylul University Faculty of Medicine, Department of Medical Biology and Genetics, Izmir, Turkey.
| | - Hakki Ogun Sercan
- Dokuz Eylul University Faculty of Medicine, Department of Medical Biology and Genetics, Izmir, Turkey.
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Cuesta-Mateos C, Alcaraz-Serna A, Somovilla-Crespo B, Muñoz-Calleja C. Monoclonal Antibody Therapies for Hematological Malignancies: Not Just Lineage-Specific Targets. Front Immunol 2018; 8:1936. [PMID: 29387053 PMCID: PMC5776327 DOI: 10.3389/fimmu.2017.01936] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 12/15/2017] [Indexed: 12/12/2022] Open
Abstract
Today, monoclonal antibodies (mAbs) are a widespread and necessary tool for biomedical science. In the hematological cancer field, since rituximab became the first mAb approved by the Food and Drug Administration for the treatment of B-cell malignancies, a number of effective mAbs targeting lineage-specific antigens (LSAs) have been successfully developed. Non-LSAs (NLSAs) are molecules that are not restricted to specific leukocyte subsets or tissues but play relevant pathogenic roles in blood cancers including the development, proliferation, survival, and refractoriness to therapy of tumor cells. In consequence, efforts to target NLSAs have resulted in a plethora of mAbs-marketed or in development-to achieve different goals like neutralizing oncogenic pathways, blocking tumor-related chemotactic pathways, mobilizing malignant cells from tumor microenvironment to peripheral blood, modulating immune-checkpoints, or delivering cytotoxic drugs into tumor cells. Here, we extensively review several novel mAbs directed against NLSAs undergoing clinical evaluation for treating hematological malignancies. The review focuses on the structure of these antibodies, proposed mechanisms of action, efficacy and safety profile in clinical studies, and their potential applications in the treatment of hematological malignancies.
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Affiliation(s)
- Carlos Cuesta-Mateos
- Servicio de Inmunología, Instituto de Investigación Sanitaria Hospital Universitario de La Princesa, Madrid, Spain
- IMMED S.L., Immunological and Medicinal Products, Madrid, Spain
| | - Ana Alcaraz-Serna
- Servicio de Inmunología, Instituto de Investigación Sanitaria Hospital Universitario de La Princesa, Madrid, Spain
| | - Beatriz Somovilla-Crespo
- Department of Immunology and Oncology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Cecilia Muñoz-Calleja
- Servicio de Inmunología, Instituto de Investigación Sanitaria Hospital Universitario de La Princesa, Madrid, Spain
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25
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Krishnamurthy N, Kurzrock R. Targeting the Wnt/beta-catenin pathway in cancer: Update on effectors and inhibitors. Cancer Treat Rev 2018; 62:50-60. [PMID: 29169144 PMCID: PMC5745276 DOI: 10.1016/j.ctrv.2017.11.002] [Citation(s) in RCA: 700] [Impact Index Per Article: 116.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 11/01/2017] [Accepted: 11/03/2017] [Indexed: 12/17/2022]
Abstract
The Wnt/beta-catenin pathway is a family of proteins that is implicated in many vital cellular functions such as stem cell regeneration and organogenesis. Several intra-cellular signal transduction pathways are induced by Wnt, notably the Wnt/beta-catenin dependent pathway or canonical pathway and the non-canonical or beta-catenin-independent pathway; the latter includes the Wnt/Ca2+ and Planar Cell Polarity pathway (PCP). Wnt activation occurs at the intestinal crypt floor, and is critical to optimal maintenance of stem cells. Colorectal cancers show evidence of Wnt signaling pathway activation and this is associated with loss of function of the tumor regulator APC. Wnt activation has been observed in breast, lung, and hematopoietic malignancies and contributes to tumor recurrence. The Wnt pathway cross talks with the Notch and Sonic Hedgehog pathways, which has implications for therapeutic interventions in cancers. There are significant challenges in targeting the Wnt pathway, including finding agents that are efficacious without damaging the system of normal somatic stem cell function in cellular repair and tissue homeostasis. Here, we comprehensively review the Wnt pathway and its interactions with the Notch and Sonic Hedgehog pathways. We present the state of the field in effectors and inhibitors of Wnt signaling, including updates on clinical trials in various cancers with inhibitors of Wnt, Notch, and Sonic Hedgehog.
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Affiliation(s)
- Nithya Krishnamurthy
- Center for Personalized Cancer Therapy, UCSD Moores Cancer Center, University of California San Diego, La Jolla, CA, USA.
| | - Razelle Kurzrock
- Center for Personalized Cancer Therapy, UCSD Moores Cancer Center, University of California San Diego, La Jolla, CA, USA; Division of Hematology-Oncology, University of California San Diego, La Jolla, CA, USA
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26
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Heusschen R, Muller J, Binsfeld M, Marty C, Plougonven E, Dubois S, Mahli N, Moermans K, Carmeliet G, Léonard A, Baron F, Beguin Y, Menu E, Cohen-Solal M, Caers J. SRC kinase inhibition with saracatinib limits the development of osteolytic bone disease in multiple myeloma. Oncotarget 2017; 7:30712-29. [PMID: 27095574 PMCID: PMC5058712 DOI: 10.18632/oncotarget.8750] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 03/31/2016] [Indexed: 12/17/2022] Open
Abstract
Multiple myeloma (MM)-associated osteolytic bone disease is a major cause of morbidity and mortality in MM patients and the development of new therapeutic strategies is of great interest. The proto-oncogene SRC is an attractive target for such a strategy. In the current study, we investigated the effect of treatment with the SRC inhibitor saracatinib (AZD0530) on osteoclast and osteoblast differentiation and function, and on the development of MM and its associated bone disease in the 5TGM.1 and 5T2MM murine MM models. In vitro data showed an inhibitory effect of saracatinib on osteoclast differentiation, polarization and resorptive function. In osteoblasts, collagen deposition and matrix mineralization were affected by saracatinib. MM cell proliferation and tumor burden remained unaltered following saracatinib treatment and we could not detect any synergistic effects with drugs that are part of standard care in MM. We observed a marked reduction of bone loss after treatment of MM-bearing mice with saracatinib as reflected by a restoration of trabecular bone parameters to levels observed in naive control mice. Histomorphometric analyses support that this occurs through an inhibition of bone resorption. In conclusion, these data further establish SRC inhibition as a promising therapeutic approach for the treatment of MM-associated osteolytic bone disease.
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Affiliation(s)
- Roy Heusschen
- Laboratory of Hematology, GIGA-Research, University of Liège, Liège, Belgium
| | - Joséphine Muller
- Laboratory of Hematology, GIGA-Research, University of Liège, Liège, Belgium
| | - Marilène Binsfeld
- Laboratory of Hematology, GIGA-Research, University of Liège, Liège, Belgium
| | - Caroline Marty
- INSERM-UMR-1132, Hôpital Lariboisière and Université Paris Diderot, Paris, France
| | - Erwan Plougonven
- Department of Chemical Engineering, PEPs (Products, Environments, Processes), University of Liège, Liège, Belgium
| | - Sophie Dubois
- Laboratory of Hematology, GIGA-Research, University of Liège, Liège, Belgium
| | - Nadia Mahli
- Laboratory of Hematology, GIGA-Research, University of Liège, Liège, Belgium
| | - Karen Moermans
- Laboratory of Clinical and Experimental Endocrinology, Department of Clinical and Experimental Medicine, KU Leuven, Leuven, Belgium
| | - Geert Carmeliet
- Laboratory of Clinical and Experimental Endocrinology, Department of Clinical and Experimental Medicine, KU Leuven, Leuven, Belgium
| | - Angélique Léonard
- Department of Chemical Engineering, PEPs (Products, Environments, Processes), University of Liège, Liège, Belgium
| | - Frédéric Baron
- Laboratory of Hematology, GIGA-Research, University of Liège, Liège, Belgium.,Division of Hematology, Department of Medicine, University and CHU of Liège, Liège, Belgium
| | - Yves Beguin
- Laboratory of Hematology, GIGA-Research, University of Liège, Liège, Belgium.,Division of Hematology, Department of Medicine, University and CHU of Liège, Liège, Belgium
| | - Eline Menu
- Department of Hematology and Immunology, Myeloma Center Brussels, Vrije Universiteit Brussel, Brussels, Belgium
| | - Martine Cohen-Solal
- INSERM-UMR-1132, Hôpital Lariboisière and Université Paris Diderot, Paris, France
| | - Jo Caers
- Laboratory of Hematology, GIGA-Research, University of Liège, Liège, Belgium.,Division of Hematology, Department of Medicine, University and CHU of Liège, Liège, Belgium
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Kagey MH, He X. Rationale for targeting the Wnt signalling modulator Dickkopf-1 for oncology. Br J Pharmacol 2017; 174:4637-4650. [PMID: 28574171 PMCID: PMC5727329 DOI: 10.1111/bph.13894] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/12/2017] [Accepted: 05/19/2017] [Indexed: 12/15/2022] Open
Abstract
Wnt signalling is a fundamental pathway involved in embryonic development and adult tissue homeostasis. Mutations in the pathway frequently lead to developmental defects and cancer. As such, therapeutic intervention of this pathway has generated tremendous interest. Dickkopf-1 (DKK1) is a secreted inhibitor of β-catenin-dependent Wnt signalling and was originally characterized as a tumour suppressor based on the prevailing view that Wnt signalling promotes cancer pathogenesis. However, DKK1 appears to increase tumour growth and metastasis in preclinical models and its elevated expression correlates with a poor prognosis in a range of cancers, indicating that DKK1 has more complex cellular and biological functions than originally appreciated. Here, we review current evidence for the cancer-promoting activity of DKK1 and recent insights into the effects of DKK1 on signalling pathways in both cancer and immune cells. We discuss the rationale and promise of targeting DKK1 for oncology. LINKED ARTICLES This article is part of a themed section on WNT Signalling: Mechanisms and Therapeutic Opportunities. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.24/issuetoc.
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Affiliation(s)
| | - Xi He
- The F. M. Kirby Neurobiology Center, Boston Children's Hospital, Department of NeurologyHarvard Medical SchoolBostonMAUSA
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28
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Abstract
PURPOSE OF REVIEW Bone disease is a defining characteristic of multiple myeloma (MM) and the major cause of morbidity. It manifests as lytic lesions or osteopenia and is often associated with severe pain, pathological fracture, spinal cord compression, vertebral collapse, and hypercalcemia. Here, we have reviewed recent data on understanding its biology and treatment. RECENT FINDINGS The imbalance between bone regeneration and bone resorption underlies the pathogenesis of osteolytic bone disease. Increased osteoclast proliferation and activity accompanied by inhibition of bone-forming osteoblasts leads to progressive bone loss and lytic lesions. Although tremendous progress has been made, MM remains an incurable disease. Novel agents targeting bone disease are under investigation with the goal of not only preventing bone loss and improving bone quality but also harnessing MM tumor growth. Current data illustrate that the interactions between MM cells and the tumor-bone microenvironment contribute to the bone disease and continued MM progression. A better understanding of this microenvironment is critical for novel therapeutic treatments of both MM and associated bone disease.
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Affiliation(s)
- Cristina Panaroni
- Center for Multiple Myeloma, Massachusetts General Hospital Cancer Center, Professional Office Building 216, 55 Fruit Street, Boston, MA, 02114, USA
- Harvard Medical School, Boston, MA, 02115, USA
| | - Andrew J Yee
- Center for Multiple Myeloma, Massachusetts General Hospital Cancer Center, Professional Office Building 216, 55 Fruit Street, Boston, MA, 02114, USA
- Harvard Medical School, Boston, MA, 02115, USA
| | - Noopur S Raje
- Center for Multiple Myeloma, Massachusetts General Hospital Cancer Center, Professional Office Building 216, 55 Fruit Street, Boston, MA, 02114, USA.
- Harvard Medical School, Boston, MA, 02115, USA.
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Mishchenko EL, Petrovskaya OV, Mishchenko AM, Petrovskiy ED, Ivanisenko NV, Ivanisenko VA. Integrated mathematical models for describing complex biological processes. Biophysics (Nagoya-shi) 2017. [DOI: 10.1134/s0006350917050141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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30
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McDonald MM, Fairfield H, Falank C, Reagan MR. Adipose, Bone, and Myeloma: Contributions from the Microenvironment. Calcif Tissue Int 2017; 100:433-448. [PMID: 27343063 PMCID: PMC5396178 DOI: 10.1007/s00223-016-0162-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Accepted: 06/06/2016] [Indexed: 12/24/2022]
Abstract
Researchers globally are working towards finding a cure for multiple myeloma (MM), a destructive blood cancer diagnosed yearly in ~750,000 people worldwide (Podar et al. in Expert Opin Emerg Drugs 14:99-127, 2009). Although MM targets multiple organ systems, it is the devastating skeletal destruction experienced by over 90 % of patients that often most severely impacts patient morbidity, pain, and quality of life. Preventing bone disease is therefore a priority in MM treatment, and understanding how and why myeloma cells target the bone marrow (BM) is fundamental to this process. This review focuses on a key area of MM research: the contributions of the bone microenvironment to disease origins, progression, and drug resistance. We describe some of the key cell types in the BM niche: osteoclasts, osteoblasts, osteocytes, adipocytes, and mesenchymal stem cells. We then focus on how these key cellular players are, or could be, regulating a range of disease-related processes spanning MM growth, drug resistance, and bone disease (including osteolysis, fracture, and hypercalcemia). We summarize the literature regarding MM-bone cell and MM-adipocyte relationships and subsequent phenotypic changes or adaptations in MM cells, with the aim of providing a deeper understanding of how myeloma cells grow in the skeleton to cause bone destruction. We identify avenues and therapies that intervene in these networks to stop tumor growth and/or induce bone regeneration. Overall, we aim to illustrate how novel therapeutic target molecules, proteins, and cellular mediators may offer new avenues to attack this disease while reviewing currently utilized therapies.
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Affiliation(s)
- Michelle M McDonald
- Garvan Institute of Medical Research, 384 Victoria Street, Sydney, NSW, 2010, Australia.
- St. Vincent's Clinical School, Faculty of Medicine, UNSW Australia, Sydney, NSW, 2010, Australia.
| | - Heather Fairfield
- Maine Medical Center Research Institute, 81 Research Drive, Scarborough, ME, 04074, USA
| | - Carolyne Falank
- Maine Medical Center Research Institute, 81 Research Drive, Scarborough, ME, 04074, USA
| | - Michaela R Reagan
- Maine Medical Center Research Institute, 81 Research Drive, Scarborough, ME, 04074, USA.
- School of Medicine, Tufts University, Boston, MA, USA.
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31
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Gavriatopoulou M, Dimopoulos MA, Kastritis E, Terpos E. Emerging treatment approaches for myeloma-related bone disease. Expert Rev Hematol 2017; 10:217-228. [PMID: 28092987 DOI: 10.1080/17474086.2017.1283213] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
INTRODUCTION Multiple myeloma is characterized by the presence of osteolytic lesions that leads to devastating skeletal-related events in the majority of patients. Myeloma bone disease is attributed to increased osteoclastic and suppressed osteoblastic activity. Areas covered: Bisphosphonates remain the main treatment option, however they have limitations on their own. Understanding the pathogenesis of myeloma bone disease may provide a roadmap for new therapeutic approaches. The pathway of RANKRANKLOPG pathway has revealed denosumab, a monoclonal antibody targeting RANKL as a novel emerging therapy for myeloma-related bone disease. Furthermore, the Wnt signaling inhibitors dicckopf-1 and sclerostin that are implicated in the pathogenesis of bone destruction of myeloma are now targeted by novel monoclonal antibodies. Activin-A is a TGF-beta superfamily member which increases osteoclast activity and inhibits osteoblast function in myeloma; sotatercept and other molecules targeting activin-A have entered into clinical development. Several other molecules and pathways that play an important role in the pathogenesis of bone destruction in myeloma, such as periostin, adiponectin, Notch and BTK signaling are also targeted in an attempt to develop novel therapies for myeloma-related bone disease. Expert commentary: We summarize the current advances in the biology of myeloma bone disease and the potential therapeutic targets.
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Affiliation(s)
- Maria Gavriatopoulou
- a Department of Clinical Therapeutics , National and Kapodistrian University of Athens School of Medicine , Athens , Greece
| | - Meletios A Dimopoulos
- a Department of Clinical Therapeutics , National and Kapodistrian University of Athens School of Medicine , Athens , Greece
| | - Efstathios Kastritis
- a Department of Clinical Therapeutics , National and Kapodistrian University of Athens School of Medicine , Athens , Greece
| | - Evangelos Terpos
- a Department of Clinical Therapeutics , National and Kapodistrian University of Athens School of Medicine , Athens , Greece
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32
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Bhavanasi D, Speer KF, Klein PS. CKAP4 is identified as a receptor for Dickkopf in cancer cells. J Clin Invest 2016; 126:2419-21. [PMID: 27322056 DOI: 10.1172/jci88620] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The secretory protein Dickkopf-1 (DKK-1) is a known Wnt antagonist and has been shown to suppress tumorigenesis in some cancer cells; however, it is also upregulated in many types of cancer and associated with poor prognosis. Wnt-independent mechanisms by which DKK-1 promotes cancer cell proliferation are not well understood. In this issue of the JCI, Kimura and colleagues demonstrate that DKK-1 interacts with cytoskeleton-associated protein 4 (CKAP4) to promote activation of AKT. They show that both DKK-1 and CKAP4 are frequently upregulated in pancreatic and lung cancers. Importantly, targeting this interaction with an anti-CKAP4 antibody prevented tumor formation in murine xenograft models. These results identify a previously unrecognized DKK-1-mediated pathway and suggest CKAP4 as a potential therapeutic target for certain cancers.
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Eda H, Santo L, Wein MN, Hu DZ, Cirstea DD, Nemani N, Tai YT, Raines SE, Kuhstoss SA, Munshi NC, Kronenberg HM, Raje NS. Regulation of Sclerostin Expression in Multiple Myeloma by Dkk-1: A Potential Therapeutic Strategy for Myeloma Bone Disease. J Bone Miner Res 2016; 31:1225-34. [PMID: 26763740 PMCID: PMC5002355 DOI: 10.1002/jbmr.2789] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 01/07/2016] [Accepted: 01/08/2016] [Indexed: 01/09/2023]
Abstract
Sclerostin is a potent inhibitor of osteoblastogenesis. Interestingly, newly diagnosed multiple myeloma (MM) patients have high levels of circulating sclerostin that correlate with disease stage and fractures. However, the source and impact of sclerostin in MM remains to be defined. Our goal was to determine the role of sclerostin in the biology of MM and its bone microenvironment as well as investigate the effect of targeting sclerostin with a neutralizing antibody (scl-Ab) in MM bone disease. Here we confirm increased sclerostin levels in MM compared with precursor disease states like monoclonal gammopathy of undetermined significance (MGUS) and smoldering MM. Furthermore, we found that a humanized MM xenograft mouse model bearing human MM cells (NOD-SCID.CB17 male mice injected intravenously with 2.5 million of MM1.S-Luc-GFP cells) demonstrated significantly higher concentrations of mouse-derived sclerostin, suggesting a microenvironmental source of sclerostin. Associated with the increased sclerostin levels, activated β-catenin expression levels were lower than normal in MM mouse bone marrow. Importantly, a high-affinity grade scl-Ab reversed osteolytic bone disease in this animal model. Because scl-Ab did not demonstrate significant in vitro anti-MM activity, we combined it with the proteasome inhibitor carfilzomib. Our data demonstrated that this combination therapy significantly inhibited tumor burden and improved bone disease in our in vivo MM mouse model. In agreement with our in vivo data, sclerostin expression was noted in marrow stromal cells and osteoblasts of MM patient bone marrow samples. Moreover, MM cells stimulated sclerostin expression in immature osteoblasts while inhibiting osteoblast differentiation in vitro. This was in part regulated by Dkk-1 secreted by MM cells and is a potential mechanism contributing to the osteoblast dysfunction noted in MM. Our data confirm the role of sclerostin as a potential therapeutic target in MM bone disease and provides the rationale for studying scl-Ab combined with proteasome inhibitors in MM. © 2016 American Society for Bone and Mineral Research.
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Affiliation(s)
- Homare Eda
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA
| | - Loredana Santo
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA
| | - Marc N. Wein
- Endocrine Unit, Massachusetts General Hospital, Boston, MA, USA
| | - Dorothy Z. Hu
- Endocrine Unit, Massachusetts General Hospital, Boston, MA, USA
| | - Diana D. Cirstea
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA
| | - Neeharika Nemani
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA
| | - Yu-Tzu Tai
- LeBow Institute for Myeloma Therapeutics and Jerome Lipper Center for Multiple Myeloma Research, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Sarah E. Raines
- Regenerative Biology, Lilly Research Laboratories, Indianapolis, IN, USA
| | | | - Nikhil C. Munshi
- LeBow Institute for Myeloma Therapeutics and Jerome Lipper Center for Multiple Myeloma Research, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | | | - Noopur S. Raje
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA
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Carrillo-López N, Panizo S, Alonso-Montes C, Román-García P, Rodríguez I, Martínez-Salgado C, Dusso AS, Naves M, Cannata-Andía JB. Direct inhibition of osteoblastic Wnt pathway by fibroblast growth factor 23 contributes to bone loss in chronic kidney disease. Kidney Int 2016; 90:77-89. [PMID: 27165819 DOI: 10.1016/j.kint.2016.01.024] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 12/23/2015] [Accepted: 01/14/2016] [Indexed: 12/20/2022]
Abstract
Bone loss and increased fractures are common complications in chronic kidney disease. Because Wnt pathway activation is essential for normal bone mineralization, we assessed whether Wnt inhibition contributes to high-phosphorus-induced mineralization defects in uremic rats. By week 20 after 7/8 nephrectomy, rats fed a high-phosphorus diet had the expected high serum creatinine, phosphorus, parathyroid hormone, and fibroblast growth factor 23 (FGF23) levels and low serum calcium. There was a 15% reduction in tibial mineral density and a doubling of bone cortical porosity compared to uremic rats fed a normal-phosphorus diet. The decreases in tibial mineral density were preceded by time-dependent increments in gene expression of bone formation (Osteocalcin and Runx2) and resorption (Cathepsin K) markers, which paralleled elevations in gene expression of the Wnt inhibitors Sfrp1 and Dkk1 in bone. Similar elevations of Wnt inhibitors plus an increased phospho-β-catenin/β-catenin ratio occurred upon exposure of the osteoblast cell line UMR106-01 either to uremic serum or to the combination of parathyroid hormone, FGF23, and soluble Klotho, at levels present in uremic serum. Strikingly, while osteoblast exposure to parathyroid hormone suppressed the expression of Wnt inhibitors, FGF23 directly inhibited the osteoblastic Wnt pathway through a soluble Klotho/MAPK-mediated process that required Dkk1 induction. Thus, the induction of Dkk1 by FGF23/soluble Klotho in osteoblasts inactivates Wnt/β-catenin signaling. This provides a novel autocrine/paracrine mechanism for the adverse impact of high FGF23 levels on bone in chronic kidney disease.
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Affiliation(s)
- Natalia Carrillo-López
- Bone and Mineral Research Unit, Instituto Reina Sofía de Investigación Nefrológica, REDinREN del ISCIII, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
| | - Sara Panizo
- Bone and Mineral Research Unit, Instituto Reina Sofía de Investigación Nefrológica, REDinREN del ISCIII, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
| | - Cristina Alonso-Montes
- Bone and Mineral Research Unit, Instituto Reina Sofía de Investigación Nefrológica, REDinREN del ISCIII, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
| | - Pablo Román-García
- Bone and Mineral Research Unit, Instituto Reina Sofía de Investigación Nefrológica, REDinREN del ISCIII, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
| | - Isabel Rodríguez
- Bone and Mineral Research Unit, Instituto Reina Sofía de Investigación Nefrológica, REDinREN del ISCIII, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
| | - Carlos Martínez-Salgado
- Instituto de Estudios de Ciencias de la Salud de Castilla y León (IECSCYL)-Instituto Biosanitario de Salamanca (IBSAL), Hospital Universitario de Salamanca, Salamanca, Spain
| | - Adriana S Dusso
- Bone and Mineral Research Unit, Instituto Reina Sofía de Investigación Nefrológica, REDinREN del ISCIII, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
| | - Manuel Naves
- Bone and Mineral Research Unit, Instituto Reina Sofía de Investigación Nefrológica, REDinREN del ISCIII, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
| | - Jorge B Cannata-Andía
- Bone and Mineral Research Unit, Instituto Reina Sofía de Investigación Nefrológica, REDinREN del ISCIII, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain; Departmento de Medicina, Universidad de Oviedo, Oviedo, Asturias, Spain.
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35
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Fairfield H, Falank C, Avery L, Reagan MR. Multiple myeloma in the marrow: pathogenesis and treatments. Ann N Y Acad Sci 2016; 1364:32-51. [PMID: 27002787 PMCID: PMC4806534 DOI: 10.1111/nyas.13038] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Multiple myeloma (MM) is a B cell malignancy resulting in osteolytic lesions and fractures. In the disease state, bone healing is limited owing to increased osteoclastic and decreased osteoblastic activity, as well as an MM-induced forward-feedback cycle where bone-embedded growth factors further enhance tumor progression as bone is resorbed. Recent work on somatic mutation in MM tumors has provided insight into cytogenetic changes associated with this disease; the initiating driver mutations causing MM are diverse because of the complexity and multitude of mutations inherent in MM tumor cells. This manuscript provides an overview of MM pathogenesis by summarizing cytogenic changes related to oncogenes and tumor suppressors associated with MM, reviewing risk factors, and describing the disease progression from monoclonal gammopathy of undetermined significance to overt MM. It also highlights the importance of the bone marrow microenvironment (BMM) in the establishment and progression of MM, as well as associated MM-induced bone disease, and the relationship of the bone marrow to current and future therapeutics. This review highlights why understanding the basic biology of the healthy and diseased BMM is crucial in the quest for better treatments and work toward a cure for genetically diverse diseases such as MM.
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Affiliation(s)
| | | | | | - Michaela R Reagan
- Maine Medical Center Research Institute, Scarborough, Maine
- University of Maine, Orono, Maine
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Abstract
Bone involvement represented by osteolytic bone disease (OBD) or osteopenia is one of the pathognomonic and defining characteristics of multiple myeloma (MM). Nearly 90 % of patients with MM develop osteolytic bone lesions, frequently complicated by skeletal-related events (SRE) such as severe bone pain, pathological fractures, vertebral collapse, hypercalcemia, and spinal cord compression. All of these not only result in a negative impact on quality of life but also adversely impact overall survival. OBD is a consequence of increased osteoclast (OC) activation along with osteoblast (OB) inhibition, resulting in altered bone remodeling. OC number and activity are increased in MM via cytokine deregulation within the bone marrow (BM) milieu, whereas negative regulators of OB differentiation suppress bone formation. Inhibition of osteolysis and stimulation of OB differentiation leads to reduced tumor growth in vivo. Therefore, novel agents targeting OBD are promising therapeutic strategies not only for the treatment of MM OBD but also for the treatment of MM. Several novel agents in addition to bisphosphonates are currently under investigation for their positive effect on bone remodeling via OC inhibition or OB stimulation. Future studies will look to combine or sequence all of these agents with the goal of not only alleviating morbidity from MM OBD but also capitalizing on the resultant antitumor activity.
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Affiliation(s)
- Homare Eda
- Multiple Myeloma Program, Medical Oncology, Massachusetts General Hospital, Boston, MA, USA
| | - Loredana Santo
- Multiple Myeloma Program, Medical Oncology, Massachusetts General Hospital, Boston, MA, USA
| | - G David Roodman
- Multiple Myeloma Program, Medical Oncology, Massachusetts General Hospital, Boston, MA, USA
| | - Noopur Raje
- Multiple Myeloma Program, Medical Oncology, Massachusetts General Hospital, Boston, MA, USA.
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Tai D, Wells K, Arcaroli J, Vanderbilt C, Aisner DL, Messersmith WA, Lieu CH. Targeting the WNT Signaling Pathway in Cancer Therapeutics. Oncologist 2015; 20:1189-98. [PMID: 26306903 PMCID: PMC4591954 DOI: 10.1634/theoncologist.2015-0057] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 06/23/2015] [Indexed: 02/05/2023] Open
Abstract
The WNT signaling cascade is integral in numerous biological processes including embryonic development, cell cycle regulation, inflammation, and cancer. Hyperactivation of WNT signaling secondary to alterations to varying nodes of the pathway have been identified in multiple tumor types. These alterations converge into increased tumorigenicity, sustained proliferation, and enhanced metastatic potential. This review seeks to evaluate the evidence supporting the WNT pathway in cancer, the therapeutic strategies in modulating this pathway, and potential challenges in drug development.
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Affiliation(s)
- David Tai
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore, Singapore; Division of Medical Oncology and Department of Pathology, University of Colorado Denver, Aurora, Colorado, USA
| | - Keith Wells
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore, Singapore; Division of Medical Oncology and Department of Pathology, University of Colorado Denver, Aurora, Colorado, USA
| | - John Arcaroli
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore, Singapore; Division of Medical Oncology and Department of Pathology, University of Colorado Denver, Aurora, Colorado, USA
| | - Chad Vanderbilt
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore, Singapore; Division of Medical Oncology and Department of Pathology, University of Colorado Denver, Aurora, Colorado, USA
| | - Dara L Aisner
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore, Singapore; Division of Medical Oncology and Department of Pathology, University of Colorado Denver, Aurora, Colorado, USA
| | - Wells A Messersmith
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore, Singapore; Division of Medical Oncology and Department of Pathology, University of Colorado Denver, Aurora, Colorado, USA
| | - Christopher H Lieu
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore, Singapore; Division of Medical Oncology and Department of Pathology, University of Colorado Denver, Aurora, Colorado, USA
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Abstract
In multicellular organisms, a tight control of cell death is required to ensure normal development and tissue homeostasis. Improper function of apoptotic or survival pathways can not only affect developmental programs but also favor cancer progression. Here we describe a novel apoptotic signaling pathway involving the transmembrane receptor Kremen1 and its ligand, the Wnt-antagonist Dickkopf1. Using a whole embryo culture system, we first show that Dickkopf1 treatment promotes cell survival in a mouse model exhibiting increased apoptosis in the developing neural plate. Remarkably, this effect was not recapitulated by chemical Wnt inhibition. We then show that Dickkopf1 receptor Kremen1 is a bona fide dependence receptor, triggering cell death unless bound to its ligand. We performed Wnt-activity assays to demonstrate that the pro-apoptotic and anti-Wnt functions mediated by Kremen1 are strictly independent. Furthermore, we combined phylogenetic and mutagenesis approaches to identify a specific motif in the cytoplasmic tail of Kremen1, which is (i) specifically conserved in the lineage of placental mammals and (ii) strictly required for apoptosis induction. Finally, we show that somatic mutations of kremen1 found in human cancers can affect its pro-apoptotic activity, supporting a tumor suppressor function. Our findings thus reveal a new Wnt-independent function for Kremen1 and Dickkopf1 in the regulation of cell survival with potential implications in cancer therapies.
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Rossi M, Calimeri T, Tagliaferri P, Tassone P. Multiple myeloma-related bone disease: state-of-art and next future treatments. Int J Hematol Oncol 2015. [DOI: 10.2217/ijh.14.45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
SUMMARY Multiple myeloma (MM) is a plasma cell malignancy associated with the development of life-threatening and/or severe osteolytic lesions, which significantly worsen the quality of life of affected patients. MM-related bone disease (BD) is the result of an overwhelming osteoclastic activity, while osteoblast-mediated bone formation is inhibited. Bisphosphonates are still the mainstay of therapy for BD. However, these drugs are associated with mid long-term sequelae. In this work, we review the pathogenesis and currently available therapies of MM-related BD. We describe the most recent and promising findings that may translate in changing the clinical practice in the next future.
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Affiliation(s)
- Marco Rossi
- Department of Experimental & Clinical Medicine, Magna Graecia University & Medical Oncology Unit, T. Campanella Cancer Center, Salvatore Venuta University Campus, Catanzaro, Italy
| | - Teresa Calimeri
- Department of Experimental & Clinical Medicine, Magna Graecia University & Medical Oncology Unit, T. Campanella Cancer Center, Salvatore Venuta University Campus, Catanzaro, Italy
| | - Pierosandro Tagliaferri
- Department of Experimental & Clinical Medicine, Magna Graecia University & Medical Oncology Unit, T. Campanella Cancer Center, Salvatore Venuta University Campus, Catanzaro, Italy
| | - Pierfrancesco Tassone
- Department of Experimental & Clinical Medicine, Magna Graecia University & Medical Oncology Unit, T. Campanella Cancer Center, Salvatore Venuta University Campus, Catanzaro, Italy
- Sbarro Institute for Cancer Research & Molecular Medicine, Center for Biotechnology, College of Science & Technology, Temple University, Philadelphia, PA 19122, USA
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Brommage R, Liu J, Hansen GM, Kirkpatrick LL, Potter DG, Sands AT, Zambrowicz B, Powell DR, Vogel P. High-throughput screening of mouse gene knockouts identifies established and novel skeletal phenotypes. Bone Res 2014; 2:14034. [PMID: 26273529 PMCID: PMC4472125 DOI: 10.1038/boneres.2014.34] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 07/29/2014] [Accepted: 07/31/2014] [Indexed: 12/13/2022] Open
Abstract
Screening gene function in vivo is a powerful approach to discover novel drug targets. We present high-throughput screening (HTS) data for 3 762 distinct global gene knockout (KO) mouse lines with viable adult homozygous mice generated using either gene-trap or homologous recombination technologies. Bone mass was determined from DEXA scans of male and female mice at 14 weeks of age and by microCT analyses of bones from male mice at 16 weeks of age. Wild-type (WT) cagemates/littermates were examined for each gene KO. Lethality was observed in an additional 850 KO lines. Since primary HTS are susceptible to false positive findings, additional cohorts of mice from KO lines with intriguing HTS bone data were examined. Aging, ovariectomy, histomorphometry and bone strength studies were performed and possible non-skeletal phenotypes were explored. Together, these screens identified multiple genes affecting bone mass: 23 previously reported genes (Calcr, Cebpb, Crtap, Dcstamp, Dkk1, Duoxa2, Enpp1, Fgf23, Kiss1/Kiss1r, Kl (Klotho), Lrp5, Mstn, Neo1, Npr2, Ostm1, Postn, Sfrp4, Slc30a5, Slc39a13, Sost, Sumf1, Src, Wnt10b), five novel genes extensively characterized (Cldn18, Fam20c, Lrrk1, Sgpl1, Wnt16), five novel genes with preliminary characterization (Agpat2, Rassf5, Slc10a7, Slc26a7, Slc30a10) and three novel undisclosed genes coding for potential osteoporosis drug targets.
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Affiliation(s)
| | - Jeff Liu
- Lexicon Pharmaceuticals , The Woodlands, TX, USA
| | | | | | | | | | | | | | - Peter Vogel
- Lexicon Pharmaceuticals , The Woodlands, TX, USA
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Wang L, Jin N, Schmitt A, Greiner J, Malcherek G, Hundemer M, Mani J, Hose D, Raab MS, Ho AD, Chen BA, Goldschmidt H, Schmitt M. T cell-based targeted immunotherapies for patients with multiple myeloma. Int J Cancer 2014; 136:1751-68. [PMID: 25195787 DOI: 10.1002/ijc.29190] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 08/28/2014] [Accepted: 09/03/2014] [Indexed: 12/17/2022]
Abstract
Despite high-dose chemotherapy followed by autologs stem-cell transplantation as well as novel therapeutic agents, multiple myeloma (MM) remains incurable. Following the general trend towards personalized therapy, targeted immunotherapy as a new approach in the therapy of MM has emerged. Better progression-free survival and overall survival after tandem autologs/allogeneic stem cell transplantation suggest a graft versus myeloma effect strongly supporting the usefulness of immunological therapies for MM patients. How to induce a powerful antimyeloma effect is the key issue in this field. Pivotal is the definition of appropriate tumor antigen targets and effective methods for expansion of T cells with clinical activity. Besides a comprehensive list of tumor antigens for T cell-based approaches, eight promising antigens, CS1, Dickkopf-1, HM1.24, Human telomerase reverse transcriptase, MAGE-A3, New York Esophageal-1, Receptor of hyaluronic acid mediated motility and Wilms' tumor gene 1, are described in detail to provide a background for potential clinical use. Results from both closed and on-going clinical trials are summarized in this review. On the basis of the preclinical and clinical data, we elaborate on three encouraging therapeutic options, vaccine-enhanced donor lymphocyte infusion, chimeric antigen receptors-transfected T cells as well as vaccines with multiple antigen peptides, to pave the way towards clinically significant immune responses against MM.
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Affiliation(s)
- Lei Wang
- Department of Internal Medicine V, University Clinic Heidelberg, University of Heidelberg, Germany
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Iyer SP, Beck JT, Stewart AK, Shah J, Kelly KR, Isaacs R, Bilic S, Sen S, Munshi NC. A Phase IB multicentre dose-determination study of BHQ880 in combination with anti-myeloma therapy and zoledronic acid in patients with relapsed or refractory multiple myeloma and prior skeletal-related events. Br J Haematol 2014; 167:366-75. [PMID: 25139740 DOI: 10.1111/bjh.13056] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 05/05/2014] [Indexed: 12/17/2022]
Abstract
Dickkopf-1 (DKK1), expressed by myeloma cells, suppresses osteoblast function and plays a key role in bone disease in multiple myeloma. BHQ880, a human neutralizing IgG1 anti-DKK1 monoclonal antibody, is being investigated for its impact on multiple myeloma-related bone disease and as an agent with potential anti-myeloma activity. The primary objectives of this Phase IB study were to determine the maximum tolerated dose (MTD) of BHQ880 and to characterize the dose-limiting toxicity (DLT) of escalating doses in combination with anti-myeloma therapy and zoledronic acid. Twenty-eight patients were enrolled and received BHQ880 at doses of 3-40 mg/kg. No DLTs were reported, therefore, the MTD was not determined. The recommended Phase II dose was declared as 10 mg/kg, based mainly on saturation data. There was a general trend towards increased bone mineral density (BMD) observed over time; specific increases in spine BMD from Cycle 12 onwards irrespective of new skeletal-related events on study were observed, and increases in bone strength at the spine and hip were also demonstrated in some patients. BHQ880 in combination with zoledronic acid and anti-myeloma therapy was well tolerated and demonstrated potential clinical activity in patients with relapsed or refractory multiple myeloma.
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Affiliation(s)
- Swaminathan P Iyer
- Houston Methodist Cancer Center, Weill Cornell Medical College, Houston, TX, USA
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43
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Webb SL, Edwards CM. Novel therapeutic targets in myeloma bone disease. Br J Pharmacol 2014; 171:3765-76. [PMID: 24750110 PMCID: PMC4128042 DOI: 10.1111/bph.12742] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/02/2014] [Accepted: 04/15/2014] [Indexed: 12/21/2022] Open
Abstract
Multiple myeloma is a neoplastic disorder of plasma cells characterized by clonal proliferation within the bone marrow. One of the major clinical features of multiple myeloma is the destructive osteolytic bone disease that occurs in the majority of patients. Myeloma bone disease is associated with increased osteoclast activity and suppression of osteoblastogenesis. Bisphosphonates have been the mainstay of treatment for many years; however, their use is limited by their inability to repair existing bone loss. Therefore, research into novel approaches for the treatment of myeloma bone disease is of the utmost importance. This review will discuss the current advances in our understanding of osteoclast stimulation and osteoblast suppression mechanisms in myeloma bone disease and the treatments that are under development to target this destructive and debilitating feature of myeloma.
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Affiliation(s)
- S L Webb
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
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44
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Garcia-Gomez A, Sanchez-Guijo F, del Cañizo MC, San Miguel JF, Garayoa M. Multiple myeloma mesenchymal stromal cells: Contribution to myeloma bone disease and therapeutics. World J Stem Cells 2014; 6:322-343. [PMID: 25126382 PMCID: PMC4131274 DOI: 10.4252/wjsc.v6.i3.322] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 03/24/2014] [Accepted: 06/11/2014] [Indexed: 02/06/2023] Open
Abstract
Multiple myeloma is a hematological malignancy in which clonal plasma cells proliferate and accumulate within the bone marrow. The presence of osteolytic lesions due to increased osteoclast (OC) activity and suppressed osteoblast (OB) function is characteristic of the disease. The bone marrow mesenchymal stromal cells (MSCs) play a critical role in multiple myeloma pathophysiology, greatly promoting the growth, survival, drug resistance and migration of myeloma cells. Here, we specifically discuss on the relative contribution of MSCs to the pathophysiology of osteolytic lesions in light of the current knowledge of the biology of myeloma bone disease (MBD), together with the reported genomic, functional and gene expression differences between MSCs derived from myeloma patients (pMSCs) and their healthy counterparts (dMSCs). Being MSCs the progenitors of OBs, pMSCs primarily contribute to the pathogenesis of MBD because of their reduced osteogenic potential consequence of multiple OB inhibitory factors and direct interactions with myeloma cells in the bone marrow. Importantly, pMSCs also readily contribute to MBD by promoting OC formation and activity at various levels (i.e., increasing RANKL to OPG expression, augmenting secretion of activin A, uncoupling ephrinB2-EphB4 signaling, and through augmented production of Wnt5a), thus further contributing to OB/OC uncoupling in osteolytic lesions. In this review, we also look over main signaling pathways involved in the osteogenic differentiation of MSCs and/or OB activity, highlighting amenable therapeutic targets; in parallel, the reported activity of bone-anabolic agents (at preclinical or clinical stage) targeting those signaling pathways is commented.
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45
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Dotterweich J, Ebert R, Kraus S, Tower RJ, Jakob F, Schütze N. Mesenchymal stem cell contact promotes CCN1 splicing and transcription in myeloma cells. Cell Commun Signal 2014; 12:36. [PMID: 24965524 PMCID: PMC4081546 DOI: 10.1186/1478-811x-12-36] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 06/06/2014] [Indexed: 12/31/2022] Open
Abstract
CCN family member 1 (CCN1), also known as cysteine-rich angiogenic inducer 61 (CYR61), belongs to the extracellular matrix-associated CCN protein family. The diverse functions of these proteins include regulation of cell migration, adhesion, proliferation, differentiation and survival/apoptosis, induction of angiogenesis and cellular senescence. Their functions are partly overlapping, largely non-redundant, cell-type specific, and depend on the local microenvironment. To elucidate the role of CCN1 in the crosstalk between stromal cells and myeloma cells, we performed co-culture experiments with primary mesenchymal stem cells (MSC) and the interleukin-6 (IL-6)-dependent myeloma cell line INA-6. Here we show that INA-6 cells display increased transcription and induction of splicing of intron-retaining CCN1 pre-mRNA when cultured in contact with MSC. Protein analyses confirmed that INA-6 cells co-cultured with MSC show increased levels of CCN1 protein consistent with the existence of a pre-mature stop codon in intron 1 that abolishes translation of unspliced mRNA. Addition of recombinant CCN1-Fc protein to INA-6 cells was also found to induce splicing of CCN1 pre-mRNA in a concentration-dependent manner. Only full length CCN1-Fc was able to induce mRNA splicing of all introns, whereas truncated recombinant isoforms lacking domain 4 failed to induce intron splicing. Blocking RGD-dependent integrins on INA-6 cells resulted in an inhibition of these splicing events. These findings expand knowledge on splicing of the proangiogenic, matricellular factor CCN1 in the tumor microenvironment. We propose that contact with MSC-derived CCN1 leads to splicing and enhanced transcription of CCN1 which further contributes to the translation of angiogenic factor CCN1 in myeloma cells, supporting tumor viability and myeloma bone disease.
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Affiliation(s)
| | | | | | | | | | - Norbert Schütze
- Orthopedic Center for Musculoskeletal Research, Orthopedic Department, University of Würzburg, Brettreichstrasse 11, 97074 Würzburg, Germany.
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46
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Zhang R, Huang S, Wang L, Peng B. Histochemical localization of Dickkopf-1 in induced rat periapical lesions. J Endod 2014; 40:1394-9. [PMID: 25146021 DOI: 10.1016/j.joen.2014.03.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Revised: 03/02/2014] [Accepted: 03/25/2014] [Indexed: 12/17/2022]
Abstract
INTRODUCTION The purpose of this study was to evaluate the expression of Dickkopf-1 (DKK-1), a secreted antagonist of the Wnt (wingless)/beta-catenin signaling pathway, during the development of periapical lesions in rats. METHODS Periapical lesions were induced in Wistar rats by occlusal exposure of the pulp of their mandibular first molars. The animals were sacrificed randomly at 0, 7, 14, 21, and 28 day after pulpal exposure. Jaws containing the first molar were obtained and routinely prepared for histologic, immunohistochemical, and enzyme histochemical double immunofluorescence analyses. Data were analyzed using 1-way analysis of variance and Pearson correlation test. RESULTS The expansion of the area of periapical lesions was visible from days 7-21 and slowed down thereafter. A few DKK-1- and receptor activator of nuclear factor kappa B ligand (RANKL)-positive cells and osteoclasts were observed on day 7. All positive samples peaked in number on day 14. The expression levels of DKK-1 and RANKL and the number of osteoclasts decreased on days 21 and 28. DKK-1 expression was positively correlated with RANKL expression and osteoclast number from days 7-28. CONCLUSIONS DKK-1 expression was up-regulated during periapical lesion development. DKK-1 may be associated with the inflammatory response and bone resorption in periapical lesions.
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Affiliation(s)
- Rui Zhang
- Department of Operative Dentistry and Endodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Shengfu Huang
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Li Wang
- Department of Operative Dentistry and Endodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Bin Peng
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of Stomatology, Wuhan University, Wuhan, China.
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Hiasa M, Teramachi J, Oda A, Amachi R, Harada T, Nakamura S, Miki H, Fujii S, Kagawa K, Watanabe K, Endo I, Kuroda Y, Yoneda T, Tsuji D, Nakao M, Tanaka E, Hamada K, Sano S, Itoh K, Matsumoto T, Abe M. Pim-2 kinase is an important target of treatment for tumor progression and bone loss in myeloma. Leukemia 2014; 29:207-17. [PMID: 24787487 DOI: 10.1038/leu.2014.147] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 03/14/2014] [Accepted: 04/21/2014] [Indexed: 02/07/2023]
Abstract
Pim-2 kinase is overexpressed in multiple myeloma (MM) cells to enhance their growth and survival, and regarded as a novel therapeutic target in MM. However, the impact of Pim-2 inhibition on bone disease in MM remains unknown. We demonstrated here that Pim-2 expression was also upregulated in bone marrow stromal cells and MC3T3-E1 preosteoblastic cells in the presence of cytokines known as the inhibitors of osteoblastogenesis in MM, including interleukin-3 (IL-3), IL-7, tumor necrosis factor-α, transforming growth factor-β (TGF-β) and activin A, as well as MM cell conditioned media. The enforced expression of Pim-2 abrogated in vitro osteoblastogenesis by BMP-2, which suggested Pim-2 as a negative regulator for osteoblastogenesis. Treatment with Pim-2 short-interference RNA as well as the Pim inhibitor SMI-16a successfully restored osteoblastogenesis suppressed by all the above inhibitory factors and MM cells. The SMI-16a treatment potentiated BMP-2-mediated anabolic signaling while suppressing TGF-β signaling. Furthermore, treatment with the newly synthesized thiazolidine-2,4-dione congener, 12a-OH, as well as its prototypic SMI-16a effectively prevented bone destruction while suppressing MM tumor growth in MM animal models. Thus, Pim-2 may have a pivotal role in tumor progression and bone loss in MM, and Pim-2 inhibition may become an important therapeutic strategy to target the MM cell-bone marrow interaction.
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Affiliation(s)
- M Hiasa
- 1] Department of Medicine and Bioregulatory Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan [2] Department of Biomaterials and Bioengineering, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan [3] Department of Orthodontics and Dentofacial Orthopedics, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - J Teramachi
- Department of Histology and Oral Histology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - A Oda
- Department of Medicine and Bioregulatory Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - R Amachi
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - T Harada
- Department of Medicine and Bioregulatory Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - S Nakamura
- Department of Medicine and Bioregulatory Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - H Miki
- Department of Medicine and Bioregulatory Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - S Fujii
- Department of Medicine and Bioregulatory Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - K Kagawa
- Department of Medicine and Bioregulatory Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - K Watanabe
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - I Endo
- Department of Medicine and Bioregulatory Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Y Kuroda
- Department of Hematology and Oncology, RIRBM, Hiroshima University, Hiroshima, Japan
| | - T Yoneda
- Department of Medicine, Hematology Oncology, Indiana University, Indianapolis, IN, USA
| | - D Tsuji
- Department of Medicinal Biotechnology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - M Nakao
- Department of Molecular Medicinal Chemistry, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - E Tanaka
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - K Hamada
- Department of Biomaterials and Bioengineering, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - S Sano
- Department of Molecular Medicinal Chemistry, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - K Itoh
- Department of Medicinal Biotechnology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - T Matsumoto
- Department of Medicine and Bioregulatory Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - M Abe
- Department of Medicine and Bioregulatory Sciences, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
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Rachner TD, Göbel A, Benad-Mehner P, Hofbauer LC, Rauner M. Dickkopf-1 as a mediator and novel target in malignant bone disease. Cancer Lett 2014; 346:172-7. [PMID: 24462802 DOI: 10.1016/j.canlet.2014.01.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 01/14/2014] [Accepted: 01/15/2014] [Indexed: 10/25/2022]
Abstract
Bone metastases are a common problem of many malignancies, including myeloma, breast and prostate cancer. The Wnt inhibitor Dickkopf-1 has been shown to be involved in the process of bone lesions by impairing osteoblast activity. This review will focus on the role of Dickkopf-1 as a mediator of malignant bone disease and discuss its potential as a novel therapeutic target.
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Affiliation(s)
- Tilman D Rachner
- Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technical University, Dresden, Germany.
| | - Andy Göbel
- Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technical University, Dresden, Germany
| | - Peggy Benad-Mehner
- Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technical University, Dresden, Germany
| | - Lorenz C Hofbauer
- Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technical University, Dresden, Germany; Center for Regenerative Therapies, Technical University, Dresden, Germany
| | - Martina Rauner
- Division of Endocrinology and Metabolic Bone Diseases, Department of Medicine III, Technical University, Dresden, Germany
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Lawasut P, Groen RWJ, Dhimolea E, Richardson PG, Anderson KC, Mitsiades CS. Decoding the pathophysiology and the genetics of multiple myeloma to identify new therapeutic targets. Semin Oncol 2013; 40:537-48. [PMID: 24135398 DOI: 10.1053/j.seminoncol.2013.07.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In recent years, significant progress has been achieved in the characterization of the transcriptional profiles, gene mutations and structural chromosomal lesions in myeloma cells. These studies have identified many candidate therapeutic targets, which are recurrently deregulated in myeloma cells. However, these targets do not appear, at least individually, to represent universal driver(s) of this disease. Furthermore, evaluation of these recurrent lesions does not suggest that they converge to a single molecular pathway. Detailed integration of molecular and functional data for these candidate targets and pathways will hopefully dissect which of them play more critical roles for each of the different individual molecular defined subtypes of this disease. This review focuses on how recent updates in our understanding of myeloma pathogenesis and molecular characterization may impact ongoing and future efforts to develop new therapeutics for this disease.
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Affiliation(s)
- Panisinee Lawasut
- Department of Medical Oncology, Dana-Farber Cancer Institute, and Department of Medicine, Harvard Medical School, Boston, MA; Division of Hematology, Department of Medicine, Faculty of Medicine, King Chulalongkorn Memorial Hospital and Chulalongkorn University, Thai Red Cross Society, Bangkok, Thailand
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Chen L, Li M, Li Q, Wang CJ, Xie SQ. DKK1 promotes hepatocellular carcinoma cell migration and invasion through β-catenin/MMP7 signaling pathway. Mol Cancer 2013; 12:157. [PMID: 24325363 PMCID: PMC4029244 DOI: 10.1186/1476-4598-12-157] [Citation(s) in RCA: 241] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Accepted: 12/03/2013] [Indexed: 12/15/2022] Open
Abstract
Background Recently several reports have indicated that elevated expression of DKK1 is tightly associated with the progression of hepatocellular carcinoma (HCC). However, the biological function of DKK1 in HCC has not yet been well documented. Methods In this study, the role of DKK1 in tumor cell proliferation, migration and invasion was investigated using MTT, colony formation, wound scratch, transwell assays, and also human HCC samples. Results Both gain- and loss-of-function studies showed that DKK1 did not influence the tumor cell proliferation and colony formation, while dramatically promoted HCC cell migration and invasion. Subsequent investigations revealed that β-catenin was an important target of DKK1. The blocking of β-catenin by pharmacological inhibitor antagonized the function of DKK1, whereas introduction of β-catenin by transfection with plasmids or treatment with GSK3β inhibitor phenocopied the pro-migration and pro-invasion effects of DKK1. We further disclosed that DKK1 exerted its pro-invasion function, at least in part, by promoting β-catenin expression, in turn, upregulating the expression of matrix metalloproteinase 7 (MMP7), which was independent of the canonical Wnt signaling pathway. Moreover, introduction of MMP7 significantly enhanced the ability of HCC cells to invade extracellular matrix gel in vitro. Consistently, in human HCC tissues, DKK1 level was positively correlated with β-catenin expression, as well as tumor metastasis. Conclusion Taken together, these results demonstrated that DKK1 is overexpressed in HCC; moreover, ectopic expression DKK1 promotes HCC cell migration and invasion at least partly through β-catenin/MMP7 signaling axis, suggesting that DKK1 may be a promising target for HCC therapy.
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Affiliation(s)
| | | | | | - Chao-Jie Wang
- Institute of Chemical Biology, Pharmaceutical College of Henan University, Kaifeng 475004, China.
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