To elucidate carcinogenesis in the endometrium, we investigated cyclin D1 immunoreactivities in 20 normal endometria, 20 endometrial hyperplasias and 141 endometrioid-type endometrial adenocarcinoma. We also evaluated the correlation of cyclin D1 expression with Ki-67, cyclin E, cyclin A, cdk2, p27 and p53, and clinicopathological parameters and prognosis. Cyclin D1 expression increased signifi...

RATIONALE Cell cycle progression in vascular smooth muscle cells (VSMCs) is a therapeutic target for restenosis. OBJECTIVE Having discovered that calmodulin (CaM)-dependent cyclin E/CDK2 activity underlies Ca(2+)-sensitive G(1)-to-S phase transitions in VSMCs, we sought to explore the physiological importance of the CaM-cyclin E interaction. METHODS AND RESULTS A peptide based on the CaM bi...

Calcium transients are known to control several transition points in the eukaryotic cell cycle. For example, we have previously shown that a coordinate elevation in the intracellular free calcium ion concentration is required for G1- to S-phase cell cycle progression in vascular smooth muscle cells (VSMC). However, the molecular basis for this Ca2+ sensitivity was not known. Using buffers with ...

PURPOSE Identifying among nephroblastoma those with a high propensity for distant metastases using cell cycle markers: cyclin E as a regulator of progression through the cell cycle and Ki-67 as a tumor proliferation marker, since both are often deregulated in many human malignancies. METHODOLOGY/PRINCIPAL FINDINGS A staining index (SI) was obtained by immunohistochemistry using anti-cyclin E ...

Integrin-mediated adhesion to substratum is required for cyclin D1 induction in mesenchymal cells, but we show here that the induction of cyclin D1 persists despite blockade of ECM-integrin signaling in MCF10A mammary epithelial cells. E-cadherin-mediated cell-cell adhesion also supports cyclin D1 induction in these cells, and the combined inhibition of both E-cadherin and integrin adhesion is ...

BACKGROUND The different mechanisms involved in p120-catenin (p120ctn) isoforms' 1/3 regulation of cell cycle progression are still not elucidated to date. METHODS AND FINDINGS We found that both cyclin D1 and cyclin E could be effectively restored by restitution of p120ctn-1A or p120ctn-3A in p120ctn depleted lung cancer cells. When the expression of cyclin D1 was blocked by co-transfection ...

Calcium transients are known to control several transition points in the eukaryotic cell cycle. For example, we have previously shown that a coordinate elevation in the intracellular free calcium ion concentration is required for G1to S-phase cell cycle progression in vascular smooth muscle cells (VSMC). However, the molecular basis for this Ca sensitivity was not known. Using buffers with diff...

RhoA has been identified as an important regulator of cell proliferation. We recently showed that the Ras/ RhoA pathway regulates the degradation of p27 and the progression of Chinese hamster embryo fibroblasts (IIC9 cells) through G1 into S phase (Weber, J. D., Hu, W., Jefcoat, S. C., Raben, D. M., and Baldassare, J. J. (1997) J. Biol. Chem. 272, 32966–32971). In this report, we have demonstra...