Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 2 de 2
Filtrar
Mais filtros











Base de dados
Intervalo de ano de publicação
1.
Cytotherapy ; 19(9): 1096-1112, 2017 09.
Artigo em Inglês | MEDLINE | ID: mdl-28733131

RESUMO

BACKGROUND AIMS: Gene therapy by autologous hematopoietic stem cell transplantation (HSCT) represents a new approach to treat sickle cell disease (SCD). Optimization of the manufacture, characterization and testing of the transduced hematopoietic stem cell final cell product (FCP), as well as an in depth in vivo toxicology study, are critical for advancing this approach to clinical trials. METHODS: Data are shown to evaluate and establish the feasibility of isolating, transducing with the Lenti/ßAS3-FB vector and cryopreserving CD34+ cells from human bone marrow (BM) at clinical scale. In vitro and in vivo characterization of the FCP was performed, showing that all the release criteria were successfully met. In vivo toxicology studies were conducted to evaluate potential toxicity of the Lenti/ßAS3-FB LV in the context of a murine BM transplant. RESULTS: Primary and secondary transplantation did not reveal any toxicity from the lentiviral vector. Additionally, vector integration site analysis of murine and human BM cells did not show any clonal skewing caused by insertion of the Lenti/ßAS3-FB vector in cells from primary and secondary transplanted mice. CONCLUSIONS: We present here a complete protocol, thoroughly optimized to manufacture, characterize and establish safety of a FCP for gene therapy of SCD.


Assuntos
Anemia Falciforme/terapia , Terapia Genética/métodos , Transplante de Células-Tronco Hematopoéticas/métodos , Células-Tronco Hematopoéticas , Adulto , Animais , Antígenos CD34/metabolismo , Células da Medula Óssea , Transplante de Medula Óssea , Estudos de Casos e Controles , Ensaios Clínicos Fase I como Assunto , Vetores Genéticos , Células-Tronco Hematopoéticas/citologia , Células-Tronco Hematopoéticas/fisiologia , Humanos , Lentivirus/genética , Camundongos Endogâmicos NOD , Transdução Genética , Transplante Autólogo/métodos
2.
J Clin Invest ; 127(5): 1689-1699, 2017 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-28346229

RESUMO

BACKGROUND: Autologous hematopoietic stem cell transplantation (HSCT) of gene-modified cells is an alternative to enzyme replacement therapy (ERT) and allogeneic HSCT that has shown clinical benefit for adenosine deaminase-deficient (ADA-deficient) SCID when combined with reduced intensity conditioning (RIC) and ERT cessation. Clinical safety and therapeutic efficacy were evaluated in a phase II study. METHODS: Ten subjects with confirmed ADA-deficient SCID and no available matched sibling or family donor were enrolled between 2009 and 2012 and received transplantation with autologous hematopoietic CD34+ cells that were modified with the human ADA cDNA (MND-ADA) γ-retroviral vector after conditioning with busulfan (90 mg/m2) and ERT cessation. Subjects were followed from 33 to 84 months at the time of data analysis. Safety of the procedure was assessed by recording the number of adverse events. Efficacy was assessed by measuring engraftment of gene-modified hematopoietic stem/progenitor cells, ADA gene expression, and immune reconstitution. RESULTS: With the exception of the oldest subject (15 years old at enrollment), all subjects remained off ERT with normalized peripheral blood mononuclear cell (PBMC) ADA activity, improved lymphocyte numbers, and normal proliferative responses to mitogens. Three of nine subjects were able to discontinue intravenous immunoglobulin replacement therapy. The MND-ADA vector was persistently detected in PBMCs (vector copy number [VCN] = 0.1-2.6) and granulocytes (VCN = 0.01-0.3) through the most recent visits at the time of this writing. No patient has developed a leukoproliferative disorder or other vector-related clinical complication since transplant. CONCLUSION: These results demonstrate clinical therapeutic efficacy from gene therapy for ADA-deficient SCID, with an excellent clinical safety profile. TRIAL REGISTRATION: ClinicalTrials.gov NCT00794508. FUNDING: Food and Drug Administration Office of Orphan Product Development award, RO1 FD003005; NHLBI awards, PO1 HL73104 and Z01 HG000122; UCLA Clinical and Translational Science Institute awards, UL1RR033176 and UL1TR000124.


Assuntos
Adenosina Desaminase/deficiência , Agamaglobulinemia , Regulação Enzimológica da Expressão Gênica , Terapia Genética , Transplante de Células-Tronco Hematopoéticas , Imunodeficiência Combinada Severa , Transdução Genética , Adenosina Desaminase/biossíntese , Adenosina Desaminase/genética , Adolescente , Agamaglobulinemia/enzimologia , Agamaglobulinemia/genética , Agamaglobulinemia/terapia , Autoenxertos , Criança , Pré-Escolar , Feminino , Vetores Genéticos , Humanos , Lactente , Masculino , Retroviridae , Imunodeficiência Combinada Severa/enzimologia , Imunodeficiência Combinada Severa/genética , Imunodeficiência Combinada Severa/terapia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA