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Chondroitin sulfate proteoglycan 4 enhanced melanoma motility and growth requires a cysteine in the core protein transmembrane domain. Melanoma Res 2020; 29:365-375. [PMID: 31140988 DOI: 10.1097/cmr.0000000000000574] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Chondroitin sulfate proteoglycan 4 (CSPG4) is a cell surface proteoglycan that enhances malignant potential in melanoma and several other tumor types. CSPG4 functions as a transmembrane scaffold in melanoma cells to activate oncogenic signaling pathways such as focal adhesion kinase (FAK) and extracellular signal regulated kinases 1,2, that control motility, invasion and anchorage independent growth. Here, we demonstrate that CSPG4 promotes directional motility and anchorage independent growth of melanoma cells by organizing and positioning a signaling complex containing activated FAK to lipid rafts within the plasma membrane of migrating cells. This FAK-containing signal transduction platform, which consists of syntenin-1, active Src and caveolin-1 requires the cytoplasmic domain of CSPG4 for assembly. Enhanced directional motility promoted by this complex also requires a CSPG4 transmembrane cysteine residue C2230. Substituting C2230 with alanine (CSPG4) still permits assembly of the signaling complex, however Src remains in an inactive state. CSPG4 also fails to promote anchorage independent growth and activation of extracellular signal regulated kinases 1,2. Therapies that target the transmembrane domain of CSPG4 could be a novel strategy for limiting progression by disrupting its function as a compartmentalized motogenic and growth-promoting oncogenic signaling node.
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Bang-Christensen SR, Pedersen RS, Pereira MA, Clausen TM, Løppke C, Sand NT, Ahrens TD, Jørgensen AM, Lim YC, Goksøyr L, Choudhary S, Gustavsson T, Dagil R, Daugaard M, Sander AF, Torp MH, Søgaard M, Theander TG, Østrup O, Lassen U, Hamerlik P, Salanti A, Agerbæk MØ. Capture and Detection of Circulating Glioma Cells Using the Recombinant VAR2CSA Malaria Protein. Cells 2019; 8:E998. [PMID: 31466397 PMCID: PMC6769911 DOI: 10.3390/cells8090998] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/21/2019] [Accepted: 08/25/2019] [Indexed: 01/04/2023] Open
Abstract
Diffuse gliomas are the most common primary malignant brain tumor. Although extracranial metastases are rarely observed, recent studies have shown the presence of circulating tumor cells (CTCs) in the blood of glioma patients, confirming that a subset of tumor cells are capable of entering the circulation. The isolation and characterization of CTCs could provide a non-invasive method for repeated analysis of the mutational and phenotypic state of the tumor during the course of disease. However, the efficient detection of glioma CTCs has proven to be challenging due to the lack of consistently expressed tumor markers and high inter- and intra-tumor heterogeneity. Thus, for this field to progress, an omnipresent but specific marker of glioma CTCs is required. In this article, we demonstrate how the recombinant malaria VAR2CSA protein (rVAR2) can be used for the capture and detection of glioma cell lines that are spiked into blood through binding to a cancer-specific oncofetal chondroitin sulfate (ofCS). When using rVAR2 pull-down from glioma cells, we identified a panel of proteoglycans, known to be essential for glioma progression. Finally, the clinical feasibility of this work is supported by the rVAR2-based isolation and detection of CTCs from glioma patient blood samples, which highlights ofCS as a potential clinical target for CTC isolation.
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Affiliation(s)
- Sara R Bang-Christensen
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
- VarCT Diagnostics, 2200 Copenhagen, Denmark
| | - Rasmus S Pedersen
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Marina A Pereira
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Thomas M Clausen
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Caroline Løppke
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Nicolai T Sand
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Theresa D Ahrens
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Amalie M Jørgensen
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Yi Chieh Lim
- Danish Cancer Society Research Center, 2100 Copenhagen, Denmark
| | - Louise Goksøyr
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Swati Choudhary
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Tobias Gustavsson
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Robert Dagil
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Mads Daugaard
- Department of Urologic Sciences, University of British Columbia, and Vancouver Prostate Centre, BC V6H 3Z6 Vancouver, Canada
| | - Adam F Sander
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Mathias H Torp
- Centre for Genomic Medicine, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Max Søgaard
- ExpreS2ion Biotechnologies, SCION-DTU Science Park, 2970 Hørsholm, Denmark
| | - Thor G Theander
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Olga Østrup
- Centre for Genomic Medicine, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Ulrik Lassen
- Department of Oncology, Copenhagen University Hospital, 2100 Copenhagen, Denmark
| | - Petra Hamerlik
- Danish Cancer Society Research Center, 2100 Copenhagen, Denmark
| | - Ali Salanti
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark.
| | - Mette Ø Agerbæk
- Centre for Medical Parasitology at Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark.
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Aya-Bonilla C, Gray ES, Manikandan J, Freeman JB, Zaenker P, Reid AL, Khattak MA, Frank MH, Millward M, Ziman M. Immunomagnetic-Enriched Subpopulations of Melanoma Circulating Tumour Cells (CTCs) Exhibit Distinct Transcriptome Profiles. Cancers (Basel) 2019; 11:cancers11020157. [PMID: 30769764 PMCID: PMC6406574 DOI: 10.3390/cancers11020157] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 01/28/2019] [Indexed: 02/06/2023] Open
Abstract
Cutaneous melanoma circulating tumour cells (CTCs) are phenotypically and molecularly heterogeneous. We profiled the gene expression of CTC subpopulations immunomagnetic-captured by targeting either the melanoma-associated marker, MCSP, or the melanoma-initiating marker, ABCB5. Firstly, the expression of a subset of melanoma genes was investigated by RT-PCR in MCSP-enriched and ABCB5-enriched CTCs isolated from a total of 59 blood draws from 39 melanoma cases. Of these, 6 MCSP- and 6 ABCB5-enriched CTC fractions were further analysed using a genome-wide gene expression microarray. The transcriptional programs of both CTC subtypes included cell survival maintenance, cell proliferation, and migration pathways. ABCB5-enriched CTCs were specifically characterised by up-regulation of genes involved in epithelial to mesenchymal transition (EMT), suggesting an invasive phenotype. These findings underscore the presence of at least two distinct melanoma CTC subpopulations with distinct transcriptional programs, which may have distinct roles in disease progression and response to therapy.
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Affiliation(s)
- Carlos Aya-Bonilla
- School of Medical and Health Sciences, Edith Cowan University, Perth, WA 6027, Australia.
| | - Elin S Gray
- School of Medical and Health Sciences, Edith Cowan University, Perth, WA 6027, Australia.
| | | | - James B Freeman
- School of Medical and Health Sciences, Edith Cowan University, Perth, WA 6027, Australia.
| | - Pauline Zaenker
- School of Medical and Health Sciences, Edith Cowan University, Perth, WA 6027, Australia.
| | - Anna L Reid
- School of Medical and Health Sciences, Edith Cowan University, Perth, WA 6027, Australia.
| | - Muhammad A Khattak
- School of Medicine, University of Western Australia, Crawley, WA 6009, Australia.
- Department of Medical Oncology, Sir Charles Gairdner Hospital, Nedlands, WA 6009, Australia.
| | - Markus H Frank
- School of Medical and Health Sciences, Edith Cowan University, Perth, WA 6027, Australia.
- Transplantation Research Program, Boston Children's Hospital and Department of Dermatology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
- Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA.
| | - Michael Millward
- School of Medicine, University of Western Australia, Crawley, WA 6009, Australia.
- Department of Medical Oncology, Sir Charles Gairdner Hospital, Nedlands, WA 6009, Australia.
| | - Mel Ziman
- School of Medical and Health Sciences, Edith Cowan University, Perth, WA 6027, Australia.
- School of Biomedical Science, University of Western Australia, Crawley, WA 6009, Australia.
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The Results of Stricter Inclusion Criteria in an Immunomagnetic Detection Study of Micrometastatic Cells in Bone Marrow of Uveal Melanoma Patients - Relevance for Dormancy. Pathol Oncol Res 2017; 25:255-262. [PMID: 29098521 DOI: 10.1007/s12253-017-0355-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 10/25/2017] [Indexed: 12/31/2022]
Abstract
Approximately 50% of uveal melanoma patients develop metastases. We want to evaluate the effect of stricter criteria on our data from our previous study correlating survival and bone marrow (BM) micrometastasis results using our immunomagnetic separation (IMS) method. Mononuclear cell fractions (MNC) isolated from BM were examined for tumour cells and the patients were classified as BM positive (BM+) or BM negative (BM-). The study originally included 328 consecutive patients with uveal melanoma from 1997 to 2006. The cohort was limited to 217 patients when we introduced cyto- or histopathological verification of melanoma cells in the patient as a main new criterion for inclusion. Tumour cells were found in BM-samples in 38.7% (95% CI, 32-45) at enrolment. Until the latest work-up 43.8% (95% CI, 38-50) of patients had developed melanoma metastases. After a minimum follow-up time of 8.5 years, 60.4% (95% CI, 54-66) of patients had died. The causes were: melanoma metastases 69.5%, another type of cancer 5.4% and non-cancerous causes 19.5%. Overall median survival was shorter for the BM- patients (11.3 years) (95% CI, 10-12) compared to the BM+ (16.5 years) (95% CI, 12-14), p = 0.04, log rank test. All-cause mortality and specific melanoma mortality estimated after 12 year follow-up showed a highly significant difference comparing BM- and BM+, p = 0.010 and p = 0,017, respectively. IMS yields a high fraction of BM+ samples due to micrometastasis at diagnosis and these cells appear to have a positive prognostic impact strengthening our previous report. The late recurrences support the concept of tumour dormancy.
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Rud AK, Boye K, Fodstad Ø, Juell S, Jørgensen LH, Solberg S, Helland Å, Brustugun OT, Mælandsmo GM. Detection of disseminated tumor cells in lymph nodes from patients with early stage non-small cell lung cancer. Diagn Pathol 2016; 11:50. [PMID: 27316334 PMCID: PMC4912762 DOI: 10.1186/s13000-016-0504-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 06/10/2016] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND The regional lymph node involvement is a major prognostic factor in patients with non-small cell lung cancer (NSCLC) undergoing surgical resection. Disease relapse is common, suggesting that early disseminated disease is already present in the regional lymph nodes at the time of surgery, and that the current nodal staging classification might be suboptimal. Early detection of disseminated tumor cells (DTCs) in lymph nodes could potentially enable identification of subcategories of patients with high risk of disease relapse. METHOD Lymph node samples were collected from 128 NSCLC patients at the time of surgery and the presence of DTCs determined by immunomagnetic selection (IMS) using the MOC31 antibody recognizing EpCAM. Results obtained with IMS were compared to the pathological staging obtained by histopathology. Associations between the presence of DTCs and clinicopathological variables and patient outcome were investigated. RESULTS DTCs were detected in 40 % of the lymph node samples by IMS. Their presence was significantly associated with pN status as assessed by histopathology, and samples from 83 % of the patients with lymph node metastases (pN1-2) had detectable DTCs. In the group of patients who were negative for lymph node metastases by standard histopathology (pN0) DTCs were detected in 32 %. The presence of DTCs was not associated with any other clinicopathological variables. Patients with IMS-positive samples showed decreased relapse free survival compared to patients with IMS-negative samples, but the difference was not statistically significant. The pN status was significantly associated with both relapse free and overall survival, but the presence of DTCs had no prognostic impact in the subcategory of patients with pN0 status. CONCLUSION Our findings do not support further development of lymph node DTC detection for clinical use in early stage NSCLC.
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Affiliation(s)
- Ane Kongsgaard Rud
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, The Norwegian Radium Hospital, PO Box 4953, Nydalen, Oslo, NO-0424, Norway.
| | - Kjetil Boye
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, The Norwegian Radium Hospital, PO Box 4953, Nydalen, Oslo, NO-0424, Norway.,Department of Oncology, Oslo University Hospital, The Norwegian Radium Hospital, Oslo, Norway
| | - Øystein Fodstad
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, The Norwegian Radium Hospital, PO Box 4953, Nydalen, Oslo, NO-0424, Norway
| | - Siri Juell
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, The Norwegian Radium Hospital, PO Box 4953, Nydalen, Oslo, NO-0424, Norway
| | - Lars H Jørgensen
- Department of Cardiovascular and Thoracic Surgery, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Steinar Solberg
- Department of Cardiovascular and Thoracic Surgery, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Åslaug Helland
- Department of Oncology, Oslo University Hospital, The Norwegian Radium Hospital, Oslo, Norway.,Department of Genetics, Institute for Cancer Research, Oslo University Hospital, The Norwegian Radium Hospital, Oslo, Norway
| | - Odd Terje Brustugun
- Department of Oncology, Oslo University Hospital, The Norwegian Radium Hospital, Oslo, Norway.,Department of Genetics, Institute for Cancer Research, Oslo University Hospital, The Norwegian Radium Hospital, Oslo, Norway
| | - Gunhild Mari Mælandsmo
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, The Norwegian Radium Hospital, PO Box 4953, Nydalen, Oslo, NO-0424, Norway.,Department of Pharmacy, Faculty of Health Sciences, University of Tromsø, Postboks 6050 Langnes, Tromsø, 9037, Norway
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Preparation of Fe3O4 encapsulated-silica sulfonic acid nanoparticles and study of their in vitro antimicrobial activity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 149:180-8. [DOI: 10.1016/j.jphotobiol.2015.06.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 05/10/2015] [Accepted: 06/06/2015] [Indexed: 11/19/2022]
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Gray ES, Reid AL, Bowyer S, Calapre L, Siew K, Pearce R, Cowell L, Frank MH, Millward M, Ziman M. Circulating Melanoma Cell Subpopulations: Their Heterogeneity and Differential Responses to Treatment. J Invest Dermatol 2015; 135:2040-2048. [PMID: 25830652 PMCID: PMC4504811 DOI: 10.1038/jid.2015.127] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 03/10/2015] [Accepted: 03/19/2015] [Indexed: 12/12/2022]
Abstract
Metastatic melanoma is a highly heterogeneous tumor; thus, methods to analyze tumor-derived cells circulating in blood should address this diversity. Taking this into account, we analyzed, using multiparametric flow cytometry, the co-expression of the melanoma markers melanoma cell adhesion molecule and melanoma-associated chondroitin sulphate proteoglycan and the tumor-initiating markers ATP-binding cassette sub-family B member 5 (ABCB5), CD271, and receptor activator of NF-κβ (RANK) in individual circulating tumor cells (CTCs) from 40 late-stage (III-IV) and 16 early-stage (I-II) melanoma patients. CTCs were heterogeneous within and between patients, with limited co-expression between the five markers analyzed. Analysis of patient matched blood and metastatic tumors revealed that ABCB5 and RANK subpopulations are more common among CTCs than in the solid tumors, suggesting a preferential selection for these cells in circulation. Pairwise comparison of CTC subpopulations longitudinally before and 6-13 weeks after treatment initiation showed that the percentage of RANK(+) CTCs significantly increased in the patients undergoing targeted therapy (N=16, P<0.01). Moreover, the presence of ⩾5 RANK(+) CTCs in the blood of patients undergoing targeted therapies was prognostic of shorter progression-free survival (hazards ratio 8.73, 95% confidence interval 1.82-41.75, P<0.01). Taken together, our results provide evidence of the heterogeneity among CTC subpopulations in melanoma and the differential response of these subpopulations to targeted therapy.
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Affiliation(s)
- Elin S Gray
- School of Medical Sciences, Edith Cowan University, Perth, Washington, Australia.
| | - Anna L Reid
- School of Medical Sciences, Edith Cowan University, Perth, Washington, Australia
| | - Samantha Bowyer
- Department of Medical Oncology, Sir Charles Gairdner Hospital, Nedlands, Washington, Australia
| | - Leslie Calapre
- School of Medical Sciences, Edith Cowan University, Perth, Washington, Australia
| | - Kelvin Siew
- Department of Medical Oncology, Sir Charles Gairdner Hospital, Nedlands, Washington, Australia
| | - Robert Pearce
- School of Medical Sciences, Edith Cowan University, Perth, Washington, Australia
| | - Lester Cowell
- Level 1 Melanoma Skin Cancer Clinic, Fremantle, Washington, Australia
| | - Markus H Frank
- School of Medical Sciences, Edith Cowan University, Perth, Washington, Australia; Transplantation Research Program, Boston Children's Hospital and Department of Dermatology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Michael Millward
- Department of Medical Oncology, Sir Charles Gairdner Hospital, Nedlands, Washington, Australia; School of Medicine and Pharmacology, University of Western Australia, Crawley, Washington, Australia
| | - Mel Ziman
- School of Medical Sciences, Edith Cowan University, Perth, Washington, Australia; School of Pathology and Laboratory Medicine, University of Western Australia, Crawley, Washington, Australia
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Eide N, Faye RS, Høifødt HK, Sandstad B, Qvale G, Faber R, Jebsen P, Kvalheim G, Fodstad Ø. Immunomagnetic detection of micrometastatic cells in bone marrow of uveal melanoma patients: a paradox. Acta Ophthalmol 2015; 93:59-66. [PMID: 25613126 DOI: 10.1111/aos.12462] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 05/01/2014] [Indexed: 02/06/2023]
Abstract
PURPOSE Our objective was to study survival rates with the bone marrow (BM) results in a cohort of uveal melanoma patients with long follow-up. METHODS Mononuclear cell fractions isolated from BM were examined for tumour cells using our immunomagnetic separation (IMS) method. The patients were classified as BM positive or BM negative. Clinical follow-up, histopathological findings, vital status and cause of death were registered. RESULTS The study included 328 consecutive patients with uveal melanoma from 1997 to 2006. Tumour cells were found in BM samples in 29% (95% CI, 25-34) at enrolment (96 cases). After a minimum follow-up time of 6 years, 156 (48%) (95% CI, 42-53) melanoma patients had died. The causes were as follows: melanoma metastases 92 (59%), another cancer 20 (13%) and non-cancer 44 (28%). Nine patients were still living with melanoma metastases. Until the latest work-up, 101(31%) (95% CI, 26-36) patients had developed melanoma metastases. Cyto- or histopathological verification of the metastatic lesions was obtained in 85 cases (84%). In the group with melanoma metastases, 28 tested BM positive at study entry (28%) (95% CI, 19-38). In total, 39 of 101 with metastases tested positive at least once after a maximum of three tests (39%) (95% CI, 29-49). The overall median survival from the first BM test was shorter for the BM negative patients (9.5 years) compared with the BM positive (14.4 years), p = 0.02, log rank test. CONCLUSION Ocular melanoma cells detected in BM seem to have a positive prognostic impact on survival in contrast to our original hypothesis.
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Affiliation(s)
- Nils Eide
- Eye Department; University Hospital HF; Oslo Norway
| | - Ragnar S. Faye
- Department of Dermatology; Oslo University Hospital HF; Oslo Norway
- Department of Tumor Biology; Oslo University Hospital HF and University of Oslo; Oslo Norway
| | - Hanne K. Høifødt
- Department of Tumor Biology; Oslo University Hospital HF and University of Oslo; Oslo Norway
| | - Berit Sandstad
- Department of Statistics; Oslo University Hospital HF; Oslo Norway
| | - Geir Qvale
- Eye Department; University Hospital HF; Oslo Norway
| | - Rowan Faber
- Eye Department; University Hospital HF; Oslo Norway
| | - Peter Jebsen
- Division of Pathology; Oslo University Hospital HF; Oslo Norway
| | - Gunnar Kvalheim
- Department of Oncology; Oslo University Hospital HF; Oslo Norway
| | - Øystein Fodstad
- Department of Tumor Biology; Oslo University Hospital HF and University of Oslo; Oslo Norway
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Rezvani M, Asgharinezhad AA, Ebrahimzadeh H, Shekari N. A polyaniline-magnetite nanocomposite as an anion exchange sorbent for solid-phase extraction of chromium(VI) ions. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1262-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Kongsgaard A, Borgen E, Mælandsmo GM, Flatmark K, Le H, Josefsen D, Solvoll I, Schirmer CB, Helland Å, Jørgensen L, Brustugun OT, Fodstad Ø, Boye K. Clinical significance of disseminated tumour cells in non-small cell lung cancer. Br J Cancer 2013; 109:1264-70. [PMID: 23942067 PMCID: PMC3778301 DOI: 10.1038/bjc.2013.450] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 07/08/2013] [Accepted: 07/10/2013] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Early-stage non-small cell lung cancer (NSCLC) patients have a high risk of disease relapse despite curatively intended surgical resection, and the detection of tumour cells in the bone marrow could be one method of determining the presence of the disseminated disease in its early stages. METHODS Bone marrow aspirates were collected from 296 patients at the time of surgery, and the presence of disseminated tumour cells was determined with the help of immunomagnetic selection (IMS) using the MOC31-antibody recognising EpCAM and with the help of standard immunocytochemistry (ICC) using the anti-cytokeratin (CK) antibodies AE1/AE3. RESULTS Disseminated tumour cells were found in 152 of 252 (59%) bone marrow samples using IMS and in 25 of 234 (11%) samples using ICC. No association between the two detection methods was observed. The presence of EpCAM⁺ cells was not associated with any clinicopathological parameters, whereas a higher frequency of CK⁺ cells was found in patients with an advanced pT status. Disseminated tumour cells, as detected using IMS, had no prognostic impact. Patients with CK⁺ cells in the bone marrow had a reduced relapse-free survival, but the difference was not statistically significant. CONCLUSION Our findings do not support the further development of DTC detection for clinical use in early-stage NSCLC. Future studies should include the molecular characterisation of DTCs, along with an attempt to identify subpopulations of cells with biological and clinical significance.
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Affiliation(s)
- Ane Kongsgaard
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, The Norwegian Radium Hospital, PO Box 4953 Nydalen NO-0424, Oslo, Norway.
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Removal and preconcentration of lead(II), cadmium(II) and chromium(III) ions from wastewater samples using surface functionalized magnetite nanoparticles. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2013. [DOI: 10.1007/s13738-013-0322-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Nanoparticles and continuous-flow systems combine synergistically for preconcentration. Trends Analyt Chem 2013. [DOI: 10.1016/j.trac.2012.08.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Madrakian T, Afkhami A, Ahmadi M. Simple in situ functionalizing magnetite nanoparticles by reactive blue-19 and their application to the effective removal of Pb2+ ions from water samples. CHEMOSPHERE 2013; 90:542-547. [PMID: 23021384 DOI: 10.1016/j.chemosphere.2012.08.025] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Revised: 08/04/2012] [Accepted: 08/13/2012] [Indexed: 06/01/2023]
Abstract
An in situ method for direct attachment of reactive blue-19 onto the surface of magnetite nanoparticles to prepare an efficient adsorbent for removal of Pb(2+) ion from water samples was proposed. The produced modified magnetite nanoparticles (MMNP) were characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and infrared spectroscopy. The synthesized MMNP showed high adsorption capacity to removal of Pb(2+) from wastewater samples. Lead ion adsorption process has been thoroughly studied from both kinetic and equilibrium points of view for adsorbent. The adsorption isotherms were analyzed using the five different isotherm models and correlation coefficients were determined for each isotherm. It was found that the Langmuir isotherm showed better correlation with the experimental data than other isotherms. The adsorption kinetics was tested for the pseudo-first order and pseudo-second order kinetic models at different experimental conditions. The kinetic data showed that the process is very fast and the adsorption process follows pseudo second order kinetic models for modified magnetite adsorbents. Thus, the new nanoparticles are favorable and useful for the removal of this metal ion, and the high adsorption capacity makes them good promising candidate materials for Pb(2+) ion removal from water samples.
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Fidale LC, Nikolajski M, Rudolph T, Dutz S, Schacher FH, Heinze T. Hybrid Fe3O4@amino cellulose nanoparticles in organic media – Heterogeneous ligands for atom transfer radical polymerizations. J Colloid Interface Sci 2013; 390:25-33. [DOI: 10.1016/j.jcis.2012.09.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Revised: 09/07/2012] [Accepted: 09/11/2012] [Indexed: 11/30/2022]
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Freeman JB, Gray ES, Millward M, Pearce R, Ziman M. Evaluation of a multi-marker immunomagnetic enrichment assay for the quantification of circulating melanoma cells. J Transl Med 2012; 10:192. [PMID: 22978632 PMCID: PMC3480925 DOI: 10.1186/1479-5876-10-192] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 09/10/2012] [Indexed: 01/05/2023] Open
Abstract
Background Circulating melanoma cells (CMCs) are thought to be valuable in improving measures of prognosis in melanoma patients and may be a useful marker of residual disease to identify non-metastatic patients requiring adjuvant therapy. We investigated whether immunomagnetic enrichment targeting multiple markers allows more efficient enrichment of CMCs from patient peripheral blood than targeting a single marker. Furthermore, we aimed to determine whether the number of CMCs in patient blood was associated with disease stage. Methods We captured CMCs by targeting the melanoma associated markers MCSP and MCAM as well as the melanoma stem cell markers ABCB5 and CD271, both individually and in combination, by immunomagnetic enrichment. CMCs were enriched and quantified from the peripheral blood of 10 non-metastatic and 13 metastatic melanoma patients. Results Targeting all markers in combination resulted in the enrichment of more CMCs than when any individual marker was targeted (p < 0.001-0.028). Furthermore, when a combination of markers was targeted, a greater number of CMCs were enriched in metastatic patients compared with non-metastatic patients (p = 0.007). Conclusions Our results demonstrated that a combination of markers should be targeted for optimal isolation of CMCs. In addition, there are significantly more CMCs in metastatic patients compared with non-metastatic patients and therefore quantification of CMCs may prove to be a useful marker of disease progression.
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Affiliation(s)
- James B Freeman
- School of Medical Sciences, Edith Cowan University, Perth, WA, Australia
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Kim MJ, Lee JY, Nehrbass U, Song R, Choi Y. Detection of melanoma using antibody-conjugated quantum dots in a coculture model for high-throughput screening system. Analyst 2012; 137:1440-5. [PMID: 22310726 DOI: 10.1039/c2an16013g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We proposed an effective strategy for evaluating the targeting specificity of an antibody-conjugated quantum dot (QD) nanoprobe in a coculture system mimicking an in vivo-like tumor microenvironment in which cancer cells grow with normal cells. Analysis of the images was performed with automated confocal microscopy. We have employed a melanoma-melanocyte coculture model to assess the specific binding of QDs conjugated with melanoma antibodies. Conjugation of antibodies to the QD significantly improved the melanoma specificity, while unconjugated antibody alone suffered from non-specific binding to melanocytes. Concentration-dependent binding and competitive inhibition studies with QD-antibody conjugates reproducibly proved the specificity to melanoma cells against melanocytes. The specificity and targeting efficiency of nanoprobes evaluated in a simple coculture model may provide a reasonable assessment for the in vitro diagnosis of early stage melanoma development before in vivo studies. Further, a rapid and sensitive cancer cell detection system demonstrated herein may allow for the development of high-throughput screening platforms for early cancer diagnosis and anti-cancer therapeutics.
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Affiliation(s)
- Myung Jin Kim
- Functional Morphometry Group, Institut Pasteur Korea (IP-K), 696 Sampyeong-dong, Bundang-gu, Seongnam-Si, Gyeonggi-Do 463-400, South Korea.
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Karimi MA, Hatefi-Mehrjardi A, Mohammadi SZ, Mohadesi A, Mazloum-Ardakani M, Nezhad MRH, Kabir AA. Solid phase extraction of trace amounts of Pb(II) in opium, heroin, lipstick, plants and water samples using modified magnetite nanoparticles prior to its atomic absorption determination. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2012. [DOI: 10.1007/s13738-011-0035-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Tveito S, Andersen K, Kåresen R, Fodstad Ø. Analysis of EpCAM positive cells isolated from sentinel lymph nodes of breast cancer patients identifies subpopulations of cells with distinct transcription profiles. Breast Cancer Res 2011; 13:R75. [PMID: 21816090 PMCID: PMC3236339 DOI: 10.1186/bcr2922] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Revised: 05/18/2011] [Accepted: 08/04/2011] [Indexed: 01/01/2023] Open
Abstract
Introduction The presence of tumor cells in the axillary lymph nodes is the most important prognostic factor in early stage breast cancer. However, the optimal method for sentinel lymph node (SLN) examination is still sought and currently many different protocols are employed. To examine two approaches for tumor cell detection we performed, in sequence, immunomagnetic enrichment and RT-PCR analysis on SLN samples from early stage breast cancer patients. This allowed us to compare findings based on the expression of cell surface proteins with those based on detection of intracellular transcripts. Methods Enrichment of EpCAM and Mucin 1 expressing cells from fresh SLN samples was achieved using magnetic beads coated with the appropriate antibodies. All resulting cell fractions were analyzed by RT-PCR using four chosen breast epithelial markers (hMAM, AGR2, SBEM, TFF1). Gene expression was further analyzed using RT-PCR arrays and markers for epithelial to mesenchymal transition (EMT). Results Both EpCAM and Mucin 1 enriched for the epithelial-marker expressing cells. However, EpCAM-IMS identified epithelial cells in 71 SLNs, whereas only 35 samples were positive with RT-PCR targeting breast epithelial transcripts. Further analysis of EpCAM positive but RT-PCR negative cell fractions showed that they had increased expression of MMPs, repressors of E-cadherin, SPARC and vimentin, all transcripts associated with the process of epithelial to mesenchymal transition. Conclusions The EpCAM IMS-assay detected tumor cells with epithelial and mesenchymal-like characteristics, thus proving to be a more robust marker than pure epithelial derived biomarkers. This finding has clinical implications, as most methods for SLN analysis today rely on the detection of epithelial transcripts or proteins.
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Affiliation(s)
- Siri Tveito
- Department of Tumor Biology, Institute for Cancer Research, Norwegian Radium Hospital, Oslo University Hospital, PB 4953 Nydalen, 0424 Oslo, Norway.
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Zhang N, Peng H, Wang S, Hu B. Fast and selective magnetic solid phase extraction of trace Cd, Mn and Pb in environmental and biological samples and their determination by ICP-MS. Mikrochim Acta 2011. [DOI: 10.1007/s00604-011-0659-3] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bakry R, Rainer M, Huck C, Bonn G. Protein profiling for cancer biomarker discovery using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and infrared imaging: A review. Anal Chim Acta 2011; 690:26-34. [DOI: 10.1016/j.aca.2011.01.044] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 01/18/2011] [Accepted: 01/20/2011] [Indexed: 10/18/2022]
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Nezos A, Msaouel P, Pissimissis N, Lembessis P, Sourla A, Armakolas A, Gogas H, Stratigos AJ, Katsambas AD, Koutsilieris M. Methods of detection of circulating melanoma cells: a comparative overview. Cancer Treat Rev 2010; 37:284-90. [PMID: 21106295 DOI: 10.1016/j.ctrv.2010.10.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2010] [Revised: 10/24/2010] [Accepted: 10/28/2010] [Indexed: 02/07/2023]
Abstract
Disease dissemination is the major cause of melanoma-related death. A crucial step in the metastatic process is the intravascular invasion and circulation of melanoma cells in the bloodstream with subsequent development of distant micrometastases that is initially clinically undetectable and will eventually progress into clinically apparent metastasis. Therefore, the use of molecular methods to detect circulating melanoma cells may be of value in risk stratification and clinical management of such patients. Herein, we review the currently applied techniques for the detection, isolation, enrichment and further characterization of circulating melanoma cells from peripheral blood samples in melanoma patients. Furthermore, we provide a brief overview of the various molecular markers currently being evaluated as prognostic indicators of melanoma progression.
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Affiliation(s)
- Andrianos Nezos
- Department of Experimental Physiology, Medical School, National and Kapodistrian University of Athens, 75 Micras Asias str., Goudi-Athens 115 27, Greece.
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Oy GF, Slipicevic A, Davidson B, Solberg Faye R, Maelandsmo GM, Flørenes VA. Biological effects induced by insulin-like growth factor binding protein 3 (IGFBP-3) in malignant melanoma. Int J Cancer 2010; 126:350-61. [PMID: 19588500 DOI: 10.1002/ijc.24727] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The insulin like growth factor (IGF) signaling pathway has been shown to contribute to melanoma progression, but little is known about the role of the IGF binding protein 3 (IGFBP-3) in melanoma biology. The aim of the present study was to characterize expression, function and regulation of IGFBP-3 in malignant melanomas and study its potential as a biomarker. The expression of IGFBP-3 varied between different human melanoma cell lines and reintroduction of the protein in non-expressing cells led to induction of apoptosis. Interestingly, in cell lines expressing endogenous IGFBP-3, siRNA silencing of the protein led to a cell line-dependent decrease in proliferation, but had no effect on apoptosis and invasion. Examination of patient material showed that IGFBP-3 is unexpressed in benign nevi while a slight increase in protein expression was seen in primary and metastatic melanoma. However, expression of the protein was low and no correlation was found with circulating levels of IGFBP-3 in serum, suggesting that IGFBP-3 has limited potential as a predictive marker in malignant melanoma. We showed that promoter methylation of IGFBP-3 occurred in both melanoma cell lines and patient material, implicating epigenetic silencing as a regulation mechanism. Furthermore, expression of the protein was shown to be regulated by the PI3-kinase/AKT and MAPK/ERK1/2 pathways. In summary, our findings suggest that IGFBP-3 can exert dual functional effects influencing both apoptosis and proliferation. Development of resistance to the antiproliferative effects of IGFBP-3 may be an important step in progression of malignant melanomas.
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Affiliation(s)
- Geir Frode Oy
- Department of Tumor Biology, Institute for Cancer Research, Oslo, Norway
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Mollaoglu N, Vairaktaris E, Nkenke E, Neukam FW, Ries J. Single Disseminated Tumor Cell Detection in Peripheral Blood Sample of Patients with Oral Squamous Cell Carcinoma Using MAGE-A4: Table 1. Lab Med 2009. [DOI: 10.1309/lm1c9q8drhyeqhks] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Eide N, Faye RS, Høifødt HK, Øvergaard R, Jebsen P, Kvalheim G, Fodstad Ø. Immunomagnetic detection of micrometastatic cells in bone marrow in uveal melanoma patients. Acta Ophthalmol 2009; 87:830-6. [PMID: 19055657 DOI: 10.1111/j.1755-3768.2008.01378.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
PURPOSE Our objective was to introduce immunomagnetic separation (IMS) in ocular research by evaluating the possibility of detecting tumour cells in bone marrow (BM) and peripheral blood (PB) samples and validating the captured cells as melanocytic cells. METHODS Mononuclear cell (MNC) fractions isolated from BM and PB in uveal melanoma patients were examined for tumour cells using our IMS method. Sheep-anti-mouse IgG antibody-coated super paramagnetic particles were conjugated to an anti-melanoma antibody. Microscopy of the magnetic fraction isolated from MNCs was performed to identify and count the number of bead-rosetted cells. The finding of at least two rosettes with coated beads in a 20-microl fraction of a sample was registered as a positive test. The melanocytic nature of the tumour cells was ascertained with a double labelling procedure using fluorescent microparticles. RESULTS Using IMS in a study of 328 patients, tumour cells were at initial diagnosis found in BM and PB in 29.9% and 1.6% of cases, respectively. In positive samples, a median of 56 tumour cells (range 2-500) were identified. The captured cells were documented to be of melanocytic origin by the simultaneous binding of fluorescent beads coated with another melanoma-associated antibody. CONCLUSIONS The IMS method was sensitive and efficient in the detection of occult melanoma tumour cells in BM. The validity of the immunomagnetic technique was strengthened by verifying the melanocytic characteristics of the isolated cells. The IMS procedure identifies intact, vital tumour cells, permitting further molecular characterization, an advantage which makes this method attractive for extended use. The clinical relevance of the findings will be further investigated in follow-up studies with repeated sampling and characterization of the isolated tumour cells.
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Affiliation(s)
- Nils Eide
- Eye Department, Ulleval University Hospital, Oslo, Norway.
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Bruland ØS, Høifødt H, Hall KS, Smeland S, Fodstad Ø. Bone marrow micrometastases studied by an immunomagnetic isolation procedure in extremity localized non-metastatic osteosarcoma patients. Cancer Treat Res 2009; 152:509-515. [PMID: 20213412 DOI: 10.1007/978-1-4419-0284-9_30] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Hematogenous spread of tumor cells is an early event in osteosarcoma and present in the majority of patients at primary diagnosis. Eradication of such micrometastases by adjuvant combination chemotherapy is crucial for survival. However, a survival plateau of 60-70% was reached over two decades ago, above which it seems difficult to further advance with the currently available therapies. In this study we have, by an immunomagnetic isolation procedure, examined the presence and prognostic impact of disseminated tumor cells in bone marrow aspirates taken at primary diagnosis in a cohort of 41 non-metastatic patients with extremity localized, high-grade osteosarcoma.
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Affiliation(s)
- Øyvind S Bruland
- Faculty of Medicine, University of Oslo and Department of Oncology, The Norwegian Radium Hospital, N-0310, Oslo, Norway.
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Berg A, Bruland ØS, Fosså SD, Nesland JM, Berner A, Schirmer C, Lilleby W. Disseminated tumor cells in bone marrow following definitive radiotherapy for intermediate or high-risk prostate cancer. Prostate 2008; 68:1607-14. [PMID: 18655095 DOI: 10.1002/pros.20826] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND The purpose of this study was to explore the prevalence of disseminated tumor cells (DTCs) in bone marrow (BM) of clinically progression-free prostate cancer (PC) patients at least 2 years after curatively intended radiotherapy (RT) with or without adjuvant hormone treatment. METHODS All patients were T(1-3)N(0)M(0) with intermediate or high risk of progression. Median time from RT to BM sampling was 5 years (2-8). A standardized immunocytochemical method applying the anticytokeratin antibodies AE1/AE3 was used for DTCs detection in 130 patients. Morphological characterization of immunostained cells was performed to exclude false positive cells. The post-treatment BM was explored in relation to pre-treatment risk factors, treatment strategy and serum levels of Testosterone and PSA at the time of BM sampling. Longitudinal changes in BM status were studied in a sub-group of 109 patients who also had donated BM prior to treatment. RESULTS Post-treatment BM-aspirates were positive for DTCs in 17% of cases without correlation to any of the tested variables. Out of 14 patients who had DTCs in BM prior to treatment, all but one had become post-treatment negative. Out of 95 patients with pre-treatment negative BM status, 18 (19%) had become post-treatment positive. CONCLUSIONS DTCs in BM were found in 17% of clinically progression-free PC patients following RT. The detection of these cells may provide PSA-independent prognostic information remaining to be explored by prolonged follow-up.
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Affiliation(s)
- Arne Berg
- Norwegian Radium Hospital, Faculty of Medicine, University of Oslo, Oslo, Norway.
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Brunsvig PF, Flatmark K, Aamdal S, Høifødt H, Le H, Jakobsen E, Sandstad B, Fodstad Ø. Bone marrow micrometastases in advanced stage non-small cell lung carcinoma patients. Lung Cancer 2008; 61:170-6. [DOI: 10.1016/j.lungcan.2007.12.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Revised: 12/12/2007] [Accepted: 12/16/2007] [Indexed: 10/22/2022]
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S100B in bone marrow aspirates in healthy individuals and malignant melanoma patients. Melanoma Res 2008; 18:134-40. [DOI: 10.1097/cmr.0b013e3282f623d9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Huang C, Hu B. Silica-coated magnetic nanoparticles modified with γ-mercaptopropyltrimethoxysilane for fast and selective solid phase extraction of trace amounts of Cd, Cu, Hg, and Pb in environmental and biological samples prior to their determination by inductively coupled plasma mass spectrometry. SPECTROCHIMICA ACTA PART B: ATOMIC SPECTROSCOPY 2008; 63:437-444. [DOI: 10.1016/j.sab.2007.12.010] [Citation(s) in RCA: 237] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Tveito S, Maelandsmo GM, Hoifodt HK, Rasmussen H, Fodstad O. Specific isolation of disseminated cancer cells: a new method permitting sensitive detection of target molecules of diagnostic and therapeutic value. Clin Exp Metastasis 2007; 24:317-27. [PMID: 17530423 DOI: 10.1007/s10585-006-9052-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2006] [Accepted: 11/17/2006] [Indexed: 10/23/2022]
Abstract
Molecular studies of rare cells, such as circulating cancer cells, require efficient pre-enrichment steps to obtain a pure population of target cells for further characterization. We have developed a two-step approach, starting with immunomagnetic enrichment, followed by specific isolation of individual, easily identifiable bead-rosetted target cells using a new semi-automated CellPick system. With this procedure, 1-50 live target cells can now be isolated. As a model system, we spiked a small number of tumor cells into millions of normal mononuclear cells (MNCs). Efficient isolation of pure target cells was obtained by use of the CellPick system, and the nature of isolated, bead-rosetted cells was verified by use of FISH. Single breast cancer cells were picked directly into an RNA preserving lysis buffer, reverse transcribed, and PCR amplified with two cDNA specific primer sets. With the isolated cells we consistently obtained both ubiquitously expressed and tumor cell specific PCR products. We also performed a successful mutation analysis of single cells using PCR and cycling temperature capillary electrophoresis (CTCE). This may have significant clinical implications in cancer and in other diseases, e.g. in characterizing micrometastatic cancer cells in blood and lymph nodes to help identifying patients who most likely will respond to therapies like tyrosine kinase inhibitors and compounds targeting specific mutations. By use of the CellPick system it is possible to specifically isolate bead-rosetted or otherwise labelled target cells from a heterogeneous cell population for further molecular characterization.
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Affiliation(s)
- Siri Tveito
- Department of Tumor Biology, Rikshospitalet-Radiumhospitalet Medical Center, Montebello, 0310, Oslo, Norway.
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Athanassiadou P, Grapsa D. Recent advances in the detection of bone marrow micrometastases: A promising area for research or just another false hope? A review of the literature. Cancer Metastasis Rev 2007; 25:507-19. [PMID: 17160555 DOI: 10.1007/s10555-006-9030-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The presence of early disseminated tumor cells (DTC), otherwise termed micrometastases or minimal residual disease, in the bone marrow (BM), or other secondary compartments, such as the blood and the lymph nodes, is the main reason for recurrence of patients with early stage epithelial cancers after "curative" resection of the primary tumor. There is increasing evidence, that the detection of DTC in BM aspirates may provide additional and independent prognostic information and aid in the stratification of these patients for adjuvant clinical treatment. However, the clinical relevance of micrometastases has not yet been firmly established. In addition, the molecular events and interactions that prevail in early metastatic disease and determine the formation or not of overt metastases remain poorly understood. The methods currently used for the detection of micrometastatic cells include extremely sensitive immunocytochemical and molecular assays, often in conjunction with enrichment techniques for the purification of tumor cells and additional increase of their sensitivity. Nevertheless, the specificity of these methods is mostly inadequate. After the impressive advances of molecular cytogenetics, a highly accurate and global assessment of the genetic status of tumors is now possible. Therefore, the greatest challenge of our time is the application of these novel technologies for the clarification of the key molecular events that initiate metastatic spread. This will further enable us to identify the highly specific and sensitive diagnostic and prognostic markers as well as the therapeutic targets which are so urgently needed.
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Affiliation(s)
- Pauline Athanassiadou
- Pathology Laboratory-Cytology Department, Medical School, Athens University, 75 Mikras Asias Str., 11527, Athens, Greece
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Berg A, Berner A, Lilleby W, Bruland ØS, Fosså SD, Nesland JM, Kvalheim G. Impact of disseminated tumor cells in bone marrow at diagnosis in patients with nonmetastatic prostate cancer treated by definitive radiotherapy. Int J Cancer 2007; 120:1603-9. [PMID: 17230512 DOI: 10.1002/ijc.22488] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The purpose of this study was to explore whether detection of disseminated tumor cells (DTCs) in bone marrow (BM) of nonmetastatic prostate cancer (PC) was associated with other clinical or histopathological factors at diagnoses or clinical outcome subsequent to definitive radiotherapy (RT). We evaluated BM aspirates from 272 cT(1-4)pN(0)M(0) PC patients by immunocytochemistry employing anticytokeratin antibodies (AE1/AE3). BM-status was compared with clinical and histopathological parameters. Long-term clinical outcome was assessed in 131 of the patients who all had completed definitive RT with or without androgen deprivation (AD), initiating treatment >5 years before cut-off date June 1, 2005. They had at least 1 unfavorable prognostic feature defined as cT(3-4) or Gleason score (GS) >or= 7B or PSA >or= 10 microg/l. Overall death, cause-specific death, distant metastases (DM) as first clinical relapse, local failure as first clinical relapse and biochemical failure were defined as end-points. DTCs were detected in 18% of the patients and were associated with increasing GS (p = 0.04) and percentage of Gleason pattern 4/5 (p = 0.04). The 7-year cumulative risk of DM was 21% for BM-positive patients vs. 6% for BM-negative patients (p = 0.07). In patients receiving RT without AD (n = 75), the 7-year cumulative risk of DM for BM-positive patients was 28% vs. 9% for BM-negative patients (p = 0.03). BM-status did not have impact on other end-points. In conclusion our study shows that presence of DTCs in BM at diagnosis was associated with the histological differentiation of the primary tumor and an increased risk of developing distant metastases after RT.
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Affiliation(s)
- Arne Berg
- Faculty of Medicine, University of Oslo, Norway.
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Müller-Berghaus J, Ehlert K, Ugurel S, Umansky V, Bucur M, Schirrmacher V, Beckhove P, Schadendorf D. Melanoma-reactive T cells in the bone marrow of melanoma patients: association with disease stage and disease duration. Cancer Res 2006; 66:5997-6001. [PMID: 16778169 DOI: 10.1158/0008-5472.can-04-0484] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Using IFN-gamma enzyme-linked immunospot, we investigated reactivity of T cells from bone marrow and peripheral blood to melanoma lysate-pulsed autologous dendritic cells in 40 melanoma patients. Melanoma-reactive T cells were present in the bone marrow of seven patients and in peripheral blood of four patients. In the bone marrow, melanoma-reactive T cells were present in 6 of 21 stage IV patients and in 1 of 10 stage III patients, whereas none were detected in stage I to II patients (0 of 9). The occurrence of tumor-reactive bone marrow T cells in melanoma patients was associated with advanced disease stage, disease duration and tumor load, and independent of treatment. These findings provide new insights into the generation of T-cell responses in melanoma patients.
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Affiliation(s)
- Jan Müller-Berghaus
- Skin Cancer Unit, German Cancer Research Center Heidelberg and University Hospital Mannheim, Mannheim, Germany and Division of Cellular Immunology, German Cancer Research Center Heidelberg, Heidelberg, Germany
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Liu FY, Chang JT, Wang HM, Liao CT, Kang CJ, Ng SH, Ng SK, Chan SC, Yen TC. [18F]fluorodeoxyglucose positron emission tomography is more sensitive than skeletal scintigraphy for detecting bone metastasis in endemic nasopharyngeal carcinoma at initial staging. J Clin Oncol 2006; 24:599-604. [PMID: 16446332 DOI: 10.1200/jco.2005.03.8760] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE Bone metastasis occurs frequently in patients with endemic nasopharyngeal carcinoma (NPC). The main objective of this study is to evaluate positron emission tomography (PET) using fluorine-18-labeled fluorodeoxyglucose ([18F]FDG) and conventional skeletal scintigraphy (SS) for detecting bone metastasis at initial staging. Auxiliary objectives are to identify risk factors for bone metastasis and features associated with poor survival in patients with bone metastasis. PATIENTS AND METHODS Patients with endemic NPC before initiation of treatment were enrolled. PET and SS were performed at initial staging and compared using McNemar's paired-sample test. Bone metastasis was considered to be present if there was any reliable evidence identified within 1 year after primary diagnosis. Multiple logistic regression and Cox's proportional hazards models were used for auxiliary objectives. RESULTS Thirty (15%) of 202 eligible patients were found to have bone metastasis. [18F]FDG PET was found to be more sensitive than SS in the patient-based analysis (P = .006) and in the region-based analysis at the spine (P = .001). Advanced N stage was the only significant risk factor (P < .0001), and the coexistence of hepatic metastasis was a prognosticator of poor survival (P = .017). The survival was not significantly better for patients with bone metastasis undetected at primary staging than for those with initially detectable bone metastasis (P = .620). CONCLUSION [18F]FDG PET is more sensitive than SS for detecting bone metastasis in endemic NPC at initial staging, whereas SS can be considered as supplementary in this setting.
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Affiliation(s)
- Feng-Yuan Liu
- Department of Nuclear Medicine and Molecular Imaging Center, Chang Gung Memorial Hospital, Taipei, Taiwan
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Bruland OS, Høifødt H, Saeter G, Smeland S, Fodstad O. Hematogenous Micrometastases in Osteosarcoma Patients. Clin Cancer Res 2005; 11:4666-73. [PMID: 16000559 DOI: 10.1158/1078-0432.ccr-05-0165] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Bone marrow and peripheral blood samples from 60 patients with suspected bone sarcoma were examined for the presence and number of micrometastatic osteosarcoma cells by a sensitive immunomagnetic detection assay, using in parallel two osteosarcoma-associated antibodies. Forty-nine of the patients had osteosarcoma, and of these, as many as 31 (63%) had tumor cells in bone marrow, in many cases with a high number of cells. Only four (8%) were positive also in blood. None of 38 control bone marrow samples were positive, including 11 from patients with suspected bone sarcoma at time of sampling who later were found not to have osteosarcoma. Fifteen of 28 patients without overt metastases at primary diagnosis (54%) were positive, 12 of whom had localized high-grade primary tumors in the extremity. Four of these have relapsed compared with none of 10 negative patients. In the group of 22 patients with extremity localized nonmetastatic osteosarcoma, information was available on the histologic response to preoperative chemotherapy in 15 patients. None of the three patients in the bone marrow-negative group who had a poor response to chemotherapy have relapsed, whereas two of the four poor responders in the bone marrow-positive cohort are dead of disease. Among 12 patients with overt metastasis at primary diagnosis, 11 (92%) were positive in bone marrow with a very high number of osteosarcoma cells. The immunomagnetically isolated cells were further characterized by the use of fluorescent latex microparticles with surface-bound antibodies targeting different membrane markers. Moreover, in cases with numerous osteosarcoma cells in bone marrow attempts to grow the selected cells in vitro were successful in two of eight attempts, and in two of five cases, isolated cells produced tumors with osteosarcoma characteristics in nude mice. In conclusion, already at primary diagnosis, a very high fraction of osteosarcoma patients had malignant cells in bone marrow, and a correlation between the presence of tumor cells, clinical stage, and disease progression was found. The data show the clinical potential of this immunomagnetic method. Attempts to subgroup osteosarcoma patients for more individualized treatment based on the presence of micrometastatic cells should be studied in a larger cohort of patients.
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Affiliation(s)
- Oyvind S Bruland
- Department Groups of Clinical and Laboratory Medicine, University of Oslo, Norway
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