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. 1989 Mar;86(6):1958–1962. doi: 10.1073/pnas.86.6.1958

Overexpression of the human BCL-2 gene product results in growth enhancement of Epstein-Barr virus-immortalized B cells.

Y Tsujimoto 1
PMCID: PMC286824  PMID: 2538824

Abstract

The biological activity of the human BCL-2 gene product was analyzed in an Epstein-Barr virus (EBV)-infected human lymphoblastoid B-cell line transfected with BCL-2 sequences driven by the simian virus 40 promoter and enhancer. Overproduction of the BCL-2 protein conferred a selective growth advantage to the EBV-infected B cells as selective growth advantage to the EBV-infected B cells as compared with control transfectants in low-serum medium and also after seeding at limiting dilution but did not render the cells tumorigenic in athymic nude mice. This growth enhancement was also seen in cells transfected with the BCL-2 gene with its own promoter juxtaposed to the immunoglobulin heavy chain gene enhancer, which represents the translocated form of the BCL-2 gene observed in follicular lymphomas with the t(14;18) translocation. The growth advantage of EBV-infected B cells overproducing the BCL-2 protein is neither due to the enhanced growth factor production nor due to an enhanced sensitivity of the BCL-2 transfectants to interleukins 1 or 6, although both lymphokines are known to stimulate proliferation of EBV-infected B-cell lines. The growth advantage of EBV-infected B cells by overproduction of the BCL-2 protein suggests the direct involvement of the BCL-2 gene product in the pathogenesis of follicular lymphoma.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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