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Production of high titer helper-free retroviruses by transient transfection

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TLDR
In this article, a method for producing high-titer, helper-free infectious retroviruses is disclosed which employs a novel strategy that uses transient transfection of new retroviral producer cell lines, ecotropic line BOSC 23 and amphotropic line CAK 8.
Abstract
A method for producing high-titer, helper-free infectious retroviruses is disclosed which employs a novel strategy that uses transient transfection of new retroviral producer cell lines, ecotropic line BOSC 23 and amphotropic line CAK 8, both of which cell lines and their precursor cell lines are disclosed. Because of the advantages over stable packaging cell lines, the BOSC 23 and CAK 8 transient transfection systems greatly facilitate and extend the use of helper-free retroviral vectors. The cell lines and corresponding methods possess wide application in both the medical and biotechnical fields, including gene therapy. These potential applications are disclosed and illustrated.

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Induction of TNF-sensitive cellular phenotype by c-Myc involves p53 and impaired NF-kappaB activation.

TL;DR: The present findings show that the cytotoxic activity of TNF towards oncoprotein‐expressing cells involves p53 and an impaired signaling for survival in such cells.
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SKAP-55 regulates integrin adhesion and formation of T cell-APC conjugates.

TL;DR: The findings identify a mechanism by which SKAP-55 modulates T cell responses to antigen and regulates integrin-mediated adhesion and conjugate formation between T cells and antigen-presenting cells (APCs).
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Active Form of Notch Imposes T Cell Fate in Human Progenitor Cells

TL;DR: It is shown unequivocally that, in human, Notch signaling inhibits the monocyte and B cell fate, promotes the Tcell fate, and alters the normal T cell differentiation pathway compatible with a pretumoral state.
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Dominant Negative Mutants Implicate STAT5 in Myeloid Cell Proliferation and Neutrophil Differentiation

TL;DR: It is demonstrated that mutations in distinct regions of STAT5 exert dominant negative effects on cytokine signaling, likely through different mechanisms, and suggest a role for STAT5 in proliferation and differentiation of myeloid cells.
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Amino-terminal signal transducer and activator of transcription (stat) domains regulate nuclear translocation and stat deactivation

TL;DR: This study indicates that STAT amino termini provide a signal that is important for nuclear translocation and, subsequently, deactivation, and suggests that deactivation may depend on a prior nuclear localization event.
References
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Journal ArticleDOI

Characteristics of a Human Cell Line Transformed by DNA from Human Adenovirus Type 5

TL;DR: Human embryonic kidney cells have been transformed by exposing cells to sheared fragments of adenovirus type 5 DNA, and the transformed cells exhibited many of the characteristics of transformation including the elaboration of a virus-specific tumour antigen.
Journal ArticleDOI

Vaccination with Irradiated Tumor Cells Engineered to Secrete Murine Granulocyte-Macrophage Colony-Stimulating Factor Stimulates Potent, Specific, and Long-Lasting Anti-Tumor Immunity

TL;DR: The results have important implications for the clinical use of genetically modified tumor cells as therapeutic cancer vaccines and the levels of anti-tumor immunity reported previously in cytokine gene transfer studies involving live, transduced cells could be achieved through the use of irradiated cells alone.
Journal ArticleDOI

Induction of chronic myelogenous leukemia in mice by the P210bcr/abl gene of the Philadelphia chromosome

TL;DR: It is demonstrated that P210bcr/abl expression can induce chronic myelogenous leukemia and retrovirus-mediated expression of the protein provides a murine model system for further analysis of the disease.
Journal ArticleDOI

The Basic Science of Gene Therapy

TL;DR: A large number of key technical issues need to be resolved before gene therapy can be safely and effectively applied in the clinic, and future technological developments will be critical for the successful practice of gene therapy.
Journal Article

Improved Retroviral Vectors for Gene Transfer and Expression

TL;DR: A set of murine retrovirus-based vectors that include unique cloning sites for insertion of cDNAs such that the cDNA can be driven by either the retroviral long terminal repeat, the immediate early promoter of human cytomegalovirus, or the simian virus 40 early promoter are described.
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