SSeCKS, first isolated as a G(1)-->S inhibitor that is downregulated in src- and ras-transformed cells, is a major cytoskeleton-associated PKC substrate with tumor suppressor and kinase-scaffolding activities. Previous attempts at constitutive expression resulted in cell variants with truncated ectopic SSeCKS products. Here, we show that tetracycline-regulated SSeCKS expression in NIH 3T3 cells...

To investigate E7-dependent biochemical changes which are involved in cellular transformation, we analyzed the influence of human papillomavirus type 16 (HPV-16) E7 on the expression of cell cycle regulatory proteins. Expression of E7 in established rodent fibroblasts (NIH 3T3), which was shown to be sufficient for transformation of these cells, leads to constitutive expression of the cyclin E ...

nloaded DNA damage response (DDR) activates downstream pathways including cell cycle checkpoints. The D1 gene is overexpressed or amplified in many human cancers and is required for gastrointestinal, , and skin tumors in murine models. A common polymorphism in the human cyclin D1 gene is atively spliced, resulting in cyclin D1a and D1b proteins that differ in their carboxyl terminus. Cyclin ere...

Downlo DNA damage response (DDR) activates downstream pathways including cell cycle checkpoints. The D1 gene is overexpressed or amplified in many human cancers and is required for gastrointestinal, , and skin tumors in murine models. A common polymorphism in the human cyclin D1 gene is atively spliced, resulting in cyclin D1a and D1b proteins that differ in their carboxyl terminus. Cyclin erex...

nloaded DNA damage response (DDR) activates downstream pathways including cell cycle checkpoints. The D1 gene is overexpressed or amplified in many human cancers and is required for gastrointestinal, , and skin tumors in murine models. A common polymorphism in the human cyclin D1 gene is atively spliced, resulting in cyclin D1a and D1b proteins that differ in their carboxyl terminus. Cyclin ere...

Three gene products, including Myc and the D- and E-type G1 cyclins, are rate limiting for G1 progression in mammalian fibroblasts. Quiescent mouse NIH 3T3 fibroblasts engineered to express a mutant colony-stimulating factor (CSF-1) receptor (CSF-1R 809F) fail to synthesize c-myc and cyclin D1 mRNAs upon CSF-1 stimulation and remain arrested in early G1 phase. Ectopic expression of c-myc or eit...

Head and neck squamous cell carcinoma (HNSCC) exhibits increased expression of cyclin D1 (CCND1). Previous studies have shown a correlation between poor prognosis of HNSCC and cyclin D1 overexpression. tRNase ZL-utilizing efficacious gene silencing (TRUE gene silencing) is one of the RNA-mediated gene expression control technologies that have therapeutic potential. This technology is based on a...

Flavopiridol is a novel flavonoid that induces cell cycle arrest at different stages of the cell cycle because of the inhibition of cyclin-dependent kinases (cdks). In previous studies from our laboratory, (B. A. Carlson et al., Cancer Res., 56: 2973–2978, 1996), we observed that exposure of the MCF-7 breast carcinoma cell line to flavopiridol resulted in G1-S arrest, which was associated with ...

Downlo DNA damage response (DDR) activates downstream pathways including cell cycle checkpoints. The D1 gene is overexpressed or amplified in many human cancers and is required for gastrointestinal, , and skin tumors in murine models. A common polymorphism in the human cyclin D1 gene is atively spliced, resulting in cyclin D1a and D1b proteins that differ in their carboxyl terminus. Cyclin erex...

Mice lacking cyclin D1 have been generated by gene targeting in embryonic stem cells. Cyclin D1-deficient animals develop to term but show reduced body size, reduced viability, and symptoms of neurological impairment. Their retinas display a striking reduction in cell number due to proliferative failure during embryonic development. In situ hybridization studies of normal mouse embryos revealed...