The s-Myc protein having the ability to induce apoptosis is selectively expressed in rat embryo chondrocytes - PubMed (original) (raw)
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- PMID: 8036017
The s-Myc protein having the ability to induce apoptosis is selectively expressed in rat embryo chondrocytes
A Asai et al. Oncogene. 1994 Aug.
Abstract
Gene transfection experiments demonstrated that over-expression of the s-myc gene under the control of a human metallothionein promoter induced apoptosis in cells such as rat and human glioma cells. In contrast to c-Myc-mediated apoptosis requiring withdrawal of serum growth factors, s-myc expression induced apoptosis in glioma cells in the presence of 10% fetal calf serum. Whereas, s-Myc-mediated apoptosis was suppressed in proportion to the increase of bcl-2 expression as seen in c-Myc mediated apoptosis. The s-myc gene was expressed in rat embryo cells being committed to differentiate to hypertrophic chondrocytes which undergo programmed cell death. CAT assay demonstrated that in the NH2-terminal region, the s-Myc protein contains a domain structure required for expression of transactivation activity that is approximately six times higher than that of c-Myc. Therefore, these findings strongly suggest that s-Myc may play an important role in transcription regulation of a set of genes whose expression induces programmed cell death in vitro and in vivo.
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