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Deola S, Scaramuzza S, Birolo RS, Cergnul M, Ficara F, Dando J, Voena C, Vai S, Monari M, Pogliani E, Corneo G, Peccatori J, Selleri S, Bordignon C, Roncarolo MG, Aiuti A, Bregni M. Molecular purging of multiple myeloma cells by ex-vivo culture and retroviral transduction of mobilized-blood CD34+ cells. J Transl Med 2007; 5:35. [PMID: 17626627 PMCID: PMC1948885 DOI: 10.1186/1479-5876-5-35] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2007] [Accepted: 07/12/2007] [Indexed: 11/21/2022] Open
Abstract
Background Tumor cell contamination of the apheresis in multiple myeloma is likely to affect disease-free and overall survival after autografting. Objective To purge myeloma aphereses from tumor contaminants with a novel culture-based purging method. Methods We cultured myeloma-positive CD34+ PB samples in conditions that retained multipotency of hematopoietic stem cells, but were unfavourable to survival of plasma cells. Moreover, we exploited the resistance of myeloma plasma cells to retroviral transduction by targeting the hematopoietic CD34+ cell population with a retroviral vector carrying a selectable marker (the truncated form of the human receptor for nerve growth factor, ΔNGFR). We performed therefore a further myeloma purging step by selecting the transduced cells at the end of the culture. Results Overall recovery of CD34+ cells after culture was 128.5%; ΔNGFR transduction rate was 28.8% for CD34+ cells and 0% for CD138-selected primary myeloma cells, respectively. Recovery of CD34+ cells after ΔNGFR selection was 22.3%. By patient-specific Ig-gene rearrangements, we assessed a decrease of 0.7–1.4 logs in tumor load after the CD34+ cell selection, and up to 2.3 logs after culture and ΔNGFR selection. Conclusion We conclude that ex-vivo culture and retroviral-mediated transduction of myeloma leukaphereses provide an efficient tumor cell purging.
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Affiliation(s)
- Sara Deola
- San Raffaele Telethon Institute for Gene Therapy (HSR-TIGET), Scientific Institute H.S. Raffaele, Milan, Italy
- Department of Transfusion Medicine, Clinical Center, National Institutes of Health, Bethesda, MD 20892, USA
| | - Samantha Scaramuzza
- San Raffaele Telethon Institute for Gene Therapy (HSR-TIGET), Scientific Institute H.S. Raffaele, Milan, Italy
| | - Roberto Sciarretta Birolo
- San Raffaele Telethon Institute for Gene Therapy (HSR-TIGET), Scientific Institute H.S. Raffaele, Milan, Italy
| | | | - Francesca Ficara
- San Raffaele Telethon Institute for Gene Therapy (HSR-TIGET), Scientific Institute H.S. Raffaele, Milan, Italy
| | - Jonathan Dando
- San Raffaele Telethon Institute for Gene Therapy (HSR-TIGET), Scientific Institute H.S. Raffaele, Milan, Italy
| | - Claudia Voena
- Hematology and BMT Unit, Scientific Institute H.S. Raffaele, Milan, Italy
- Department of Biomedical Sciences and Human Oncology and Center for Experimental Research and Clinical Studies, University of Turin, Turin, Italy
| | - Sergio Vai
- Hematology and BMT Unit, Scientific Institute H.S. Raffaele, Milan, Italy
| | - Marta Monari
- Hematology and BMT Unit, Scientific Institute H.S. Raffaele, Milan, Italy
| | - Enrico Pogliani
- Hematology and Bone Marrow Transplant Unit, Hospital S. Gerardo, Monza, Italy
| | - Gianmarco Corneo
- Hematology and Bone Marrow Transplant Unit, Hospital S. Gerardo, Monza, Italy
| | - Jacopo Peccatori
- Hematology and BMT Unit, Scientific Institute H.S. Raffaele, Milan, Italy
| | - Silvia Selleri
- Department of Transfusion Medicine, Clinical Center, National Institutes of Health, Bethesda, MD 20892, USA
- Department of Human Morphology, University of Milan, Milan, Italy
| | - Claudio Bordignon
- Hematology and BMT Unit, Scientific Institute H.S. Raffaele, Milan, Italy
| | - Maria Grazia Roncarolo
- San Raffaele Telethon Institute for Gene Therapy (HSR-TIGET), Scientific Institute H.S. Raffaele, Milan, Italy
| | - Alessandro Aiuti
- San Raffaele Telethon Institute for Gene Therapy (HSR-TIGET), Scientific Institute H.S. Raffaele, Milan, Italy
| | - Marco Bregni
- Hematology and BMT Unit, Scientific Institute H.S. Raffaele, Milan, Italy
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Deola S, Scaramuzza S, Birolo RS, Carballido-Perrig N, Ficara F, Mocchetti C, Dando J, Carballido JM, Bordignon C, Roncarolo MG, Bregni M, Aiuti A. Mobilized blood CD34+ cells transduced and selected with a clinically applicable protocol reconstitute lymphopoiesis in SCID-Hu mice. Hum Gene Ther 2005; 15:305-11. [PMID: 15018739 DOI: 10.1089/104303404322886156] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We developed a clinically applicable gene transfer procedure into mobilized peripheral blood (MPB) CD34(+) hematopoietic progenitor cells, based on single viral exposure and selection of engineered cells. CD34(+) cells were transduced with a retroviral vector carrying the truncated form of the nerve growth factor receptor (Delta NGFR) marker gene, and immunoselected for Delta NGFR expression. Optimal time and procedure for viral exposure, length of culture, and transgene expression of MPB CD34(+) cells were determined using in vitro assays. The multipotent capacity of MPB CD34(+)-transduced cells was demonstrated in the SCID-hu bone/liver/thymus mouse model. Transduced Delta NGFR(+) cells retained 50% of long-term culture-colony forming cells (LTC-CFC) compared to unmanipulated CD34(+) cells. In SCID-hu mice, 52% of CD45(+) cells, 27% of CD34(+) cells, 49% of B cells, and more than 50% of T cells were derived from transplanted CD34(+)/Delta NGFR(+) cells. Furthermore, transplantation of purified transduced cells greatly reduced the competition with untransduced progenitors occurring in unselected grafts. These data demonstrate that MPB CD34(+) cells, transduced with a single viral exposure and selected by transgene expression, retain multilineage reconstitution capacity and remarkable transgene expression.
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Affiliation(s)
- Sara Deola
- San Raffaele Telethon Institute for Gene Therapy (HSR-TIGET), 20132 Milan, Italy
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