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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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RhoB alteration is necessary for apoptotic and antineoplastic responses to farnesyltransferase inhibitors.

TL;DR: Genetic proof is offered of the hypothesis that RhoB-GG is a crucial mediator of the antineoplastic effects of FTIs and the apoptotic defect of −/− cells compromised the antitumor efficacy of FTI in xenograft assays.
Journal ArticleDOI

Modulation of the F-actin cytoskeleton by c-Abl tyrosine kinase in cell spreading and neurite extension

TL;DR: It is shown that c-Abl stimulated the formation of actin microspikes in fibroblasts spreading on fibronectin, and the reciprocal regulation between F-actin and the c- Abl tyrosine kinase may provide a self-limiting mechanism in the control of act in cytoskeleton dynamics.
Journal ArticleDOI

Mammalian NUMB is an evolutionarily conserved signaling adapter protein that specifies cell fate.

TL;DR: The results demonstrate that mNUMB is an evolutionarily conserved functional homologue of d NUMB, and establish a link to tyrosine-kinase-mediated signal transduction pathways, and suggest that m NUMB and dNUMB are new members of a family of signaling adapter molecules that mediate conserved cell-fate decisions during development.
Journal ArticleDOI

Modulation of HIV-1 infectivity by MAPK, a virion-associated kinase.

TL;DR: Regulation of an early step in HIV‐1 infection by the host cell MAPK signal transduction pathway by the mitogen‐activated protein kinase (ERK/MAPK) is demonstrated.
Journal ArticleDOI

Resistance to experimental tumorigenesis in cells of a long-lived mammal, the naked mole-rat (Heterocephalus glaber)

TL;DR: Rapid crisis is a response of oncogene‐expressing NMR cells to growth in an in vivo environment, which requires anchorage independence, and hTERT permits cells to avoid crisis and to achieve malignant tumor growth.
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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