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Hathi D, Chanswangphuwana C, Cho N, Fontana F, Maji D, Ritchey J, O'Neal J, Ghai A, Duncan K, Akers WJ, Fiala M, Vij R, DiPersio JF, Rettig M, Shokeen M. Ablation of VLA4 in multiple myeloma cells redirects tumor spread and prolongs survival. Sci Rep 2022; 12:30. [PMID: 34996933 PMCID: PMC8741970 DOI: 10.1038/s41598-021-03748-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 12/08/2021] [Indexed: 12/11/2022] Open
Abstract
Multiple myeloma (MM) is a cancer of bone marrow (BM) plasma cells, which is increasingly treatable but still incurable. In 90% of MM patients, severe osteolysis results from pathological interactions between MM cells and the bone microenvironment. Delineating specific molecules and pathways for their role in cancer supportive interactions in the BM is vital for developing new therapies. Very Late Antigen 4 (VLA4, integrin α4β1) is a key player in cell–cell adhesion and signaling between MM and BM cells. We evaluated a VLA4 selective near infrared fluorescent probe, LLP2A-Cy5, for in vitro and in vivo optical imaging of VLA4. Furthermore, two VLA4-null murine 5TGM1 MM cell (KO) clones were generated by CRISPR/Cas9 knockout of the Itga4 (α4) subunit, which induced significant alterations in the transcriptome. In contrast to the VLA4+ 5TGM1 parental cells, C57Bl/KaLwRij immunocompetent syngeneic mice inoculated with the VLA4-null clones showed prolonged survival, reduced medullary disease, and increased extramedullary disease burden. The KO tumor foci showed significantly reduced uptake of LLP2A-Cy5, confirming in vivo specificity of this imaging agent. This work provides new insights into the pathogenic role of VLA4 in MM, and evaluates an optical tool to measure its expression in preclinical models.
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Affiliation(s)
- Deep Hathi
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Chantiya Chanswangphuwana
- Department of Medicine, Division of Molecular Oncology, Washington University School of Medicine, St. Louis, MO, USA.,Department of Medicine, Division of Hematology, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Bangkok, Thailand
| | - Nicholas Cho
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Francesca Fontana
- Department of Medicine, Division of Cardiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Dolonchampa Maji
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Julie Ritchey
- Department of Medicine, Division of Molecular Oncology, Washington University School of Medicine, St. Louis, MO, USA
| | - Julie O'Neal
- Department of Medicine, Division of Molecular Oncology, Washington University School of Medicine, St. Louis, MO, USA
| | - Anchal Ghai
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Kathleen Duncan
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Walter J Akers
- Center for In Vivo Imaging and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Mark Fiala
- Department of Medicine, Division of Molecular Oncology, Washington University School of Medicine, St. Louis, MO, USA
| | - Ravi Vij
- Department of Medicine, Division of Molecular Oncology, Washington University School of Medicine, St. Louis, MO, USA
| | - John F DiPersio
- Department of Medicine, Division of Molecular Oncology, Washington University School of Medicine, St. Louis, MO, USA
| | - Michael Rettig
- Department of Medicine, Division of Molecular Oncology, Washington University School of Medicine, St. Louis, MO, USA
| | - Monica Shokeen
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA. .,Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA.
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Integrin Beta 1 Promotes Glioma Cell Proliferation by Negatively Regulating the Notch Pathway. JOURNAL OF ONCOLOGY 2020; 2020:8297017. [PMID: 33014056 PMCID: PMC7512099 DOI: 10.1155/2020/8297017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 08/28/2020] [Accepted: 08/31/2020] [Indexed: 02/07/2023]
Abstract
In this study, genes associated with the Notch signaling pathway in gliomas were analyzed using bioinformatics and in vitro experiments. The dataset GSE22772 was downloaded from the Gene-Cloud of Biotechnology Information database. Differentially expressed genes (DEGs) between short hairpin RNA (shRNA) intervening glioma cells and control cells were screened using the unpaired t test. Functional enrichment analysis was performed, and coexpression network was analyzed to identify the most important genes associated with the Notch signaling pathway. Integrin beta 1 (ITGB1) mRNA and protein levels in clinical glioma tumor samples and tumor adjacent normal tissue samples were analyzed using quantitative real-time PCR and immunohistochemistry, respectively. The relationship between ITGB1 expression and the prognosis of patients with gliomas was analyzed using the Kaplan-Meier curve. ITGB1 interference expression cell line U87 and ITGB1 overexpressing cell line were established using sh-ITGB1 and oe-ITGB1 plasmids, respectively. MTT and colony formation assays were used to detect changes in the proliferation of glioma cells. Moreover, western blotting was used to detect the expression of Notch and Hey1. A total of 7,962 DEGs were screened between shRNA intervening glioma cells and control cells, which were mainly associated with spliceosome, proteoglycans in cancer, focal adhesion, and the Notch signaling pathway. ITGB1 showed the highest expression in the coexpression network. The mRNA and protein expression of ITGB1 in glioma tumor samples was significantly higher than that in tumor adjacent normal tissue samples (p < 0.05). Overall survival time of patients in the ITGB1 low-expression group was significantly longer than that in the ITGB1 high-expression group, indicating that ITGB1 expression negatively correlated with the prognosis. Fluorescence microscopy, qRT-PCR, and western blotting confirmed the transfection efficiency of ITGB1 overexpression and interference expression in U251 and U87 cells. The MTT and colony formation assays indicated that U87 cell proliferation was significantly inhibited after intervention with ITGB1 (p < 0.05), and overexpression of ITGB1 significantly promoted U251 cell proliferation (p < 0.05). In addition, the expression of Notch and Hey1 proteins was significantly decreased after ITGB1 intervention (p < 0.05), and their expression was significantly upregulated after ITGB1 overexpression (p < 0.05). ITGB1 expression in glioma tissues was significantly higher than that in adjacent normal tissues and was negatively correlated with the survival time of patients. Therefore, ITGB1 can significantly promote proliferation of glioma cells via feedback regulation of the Notch signaling pathway.
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Sevilla-Movilla S, Arellano-Sánchez N, Martínez-Moreno M, Gajate C, Sánchez-Vencells A, Valcárcel LV, Agirre X, Valeri A, Martínez-López J, Prósper F, Mollinedo F, Teixidó J. Upregulated expression and function of the α4β1 integrin in multiple myeloma cells resistant to bortezomib. J Pathol 2020; 252:29-40. [PMID: 32501543 DOI: 10.1002/path.5480] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/29/2020] [Accepted: 05/28/2020] [Indexed: 12/11/2022]
Abstract
The interaction of multiple myeloma (MM) cells with the bone marrow (BM) microenvironment promotes MM cell retention, survival, and resistance to different anti-MM agents, including proteasome inhibitors (PIs) such as bortezomib (BTZ). The α4β1 integrin is a main adhesion receptor mediating MM cell-stroma interactions and MM cell survival, and its expression and function are downregulated by BTZ, leading to inhibition of cell adhesion-mediated drug resistance (CAM-DR) and MM cell apoptosis. Whether decreased α4β1 expression and activity are maintained or recovered upon development of resistance to BTZ represents an important question, as a potential rescue of α4β1 function could boost MM cell survival and disease progression. Using BTZ-resistant MM cells, we found that they not only rescue their α4β1 expression, but its levels were higher than in parental cells. Increased α4β1 expression in resistant cells correlated with enhanced α4β1-mediated cell lodging in the BM, and with disease progression. BTZ-resistant MM cells displayed enhanced NF-κB pathway activation relative to parental counterparts, which contributed to upregulated α4 expression and to α4β1-dependent MM cell adhesion. These data emphasize the upregulation of α4β1 expression and function as a key event during resistance to BTZ in MM, which might indirectly contribute to stabilize this resistance, as stronger MM cell attachment to BM stroma will regain CAM-DR and MM cell growth and survival. Finally, we found a strong correlation between high ITGB1 (integrin β1) expression in MM and poor progression-free survival (PFS) and overall survival (OS) during treatment of MM patients with BTZ and IMIDs, and combination of high ITGB1 levels and presence of the high-risk genetic factor amp1q causes low PFS and OS. These results unravel a novel prognostic value for ITGB1 in myeloma. © 2020 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Silvia Sevilla-Movilla
- Department of Molecular Biomedicine, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Nohemí Arellano-Sánchez
- Department of Molecular Biomedicine, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Mónica Martínez-Moreno
- Department of Molecular Biomedicine, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Consuelo Gajate
- Department of Molecular Biomedicine, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Anna Sánchez-Vencells
- Department of Molecular Biomedicine, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Luis V Valcárcel
- Centro de Investigación Médica Aplicada, Universidad de Navarra, Pamplona, Spain
| | - Xabier Agirre
- Centro de Investigación Médica Aplicada, Universidad de Navarra, Pamplona, Spain
| | - Antonio Valeri
- Department of Translational Hematology, Hospital Universitario 12 de Octubre, Centro Nacional de Investigaciones Oncológicas, CIBERONC, Madrid, Spain
| | - Joaquin Martínez-López
- Department of Translational Hematology, Hospital Universitario 12 de Octubre, Centro Nacional de Investigaciones Oncológicas, CIBERONC, Madrid, Spain
| | - Felipe Prósper
- Centro de Investigación Médica Aplicada, Universidad de Navarra, Pamplona, Spain.,Department of Hematology, Clínica Universidad de Navarra, Universidad de Navarra, Pamplona, Spain
| | - Faustino Mollinedo
- Department of Molecular Biomedicine, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
| | - Joaquin Teixidó
- Department of Molecular Biomedicine, Centro de Investigaciones Biológicas Margarita Salas (CSIC), Madrid, Spain
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