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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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Neoplastic transformation by Notch requires nuclear localization.

TL;DR: Direct evidence that N1ic must accumulate in the nucleus to induce transformation of RKE cells is reported and the minimal domain of N1is defined, which is likely to be through a CBF1-independent pathway.
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Method for obtaining retroviral packaging cell lines producing high transducing efficiency retroviral supernatant

TL;DR: In this article, a method for obtaining a recombinant retroviral packaging cell capable of producing retro-viral vectors as well as the recombinant packaging cell obtained by the method is presented.
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Bruton’s tyrosine kinase regulates apoptosis and JNK/SAPK kinase activity

TL;DR: The notion that Btk regulates apoptosis through the JNK activation is supported, as mast cells derived from Bruton's tyrosine kinase-defective xid or btk null mice showed greater expansion in culture containing interleukin-3 than those from wild-type (wt) mice.
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The presence of host-derived HLA-DR1 on human immunodeficiency virus type 1 increases viral infectivity.

TL;DR: It is suggested that HLA-DR-1-bearing HIV-1 particles had a greater infectivity per picogram of viral p24 protein than H LA-DR1-free virions and that the presence of virion-bound cellular HLA -DR1 is associated with faster kinetics of virus infection.
Journal ArticleDOI

TLS/FUS, a pro‐oncogene involved in multiple chromosomal translocations, is a novel regulator of BCR/ABL‐mediated leukemogenesis

TL;DR: Results suggest that FUS might function as a regulator of BCR/ABL leukemogenesis, promoting growth factor independence and preventing differentiation via modulation of cytokine receptor expression.
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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