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2019/02/18
Toxicological Evaluation of SiO2 Nanoparticles by Zebrafish Embryo Toxicity Test
2018/12/27
Increased susceptibility to oxidative stress-induced toxicological evaluation by genetically modified nrf2a-deficient zebrafish.
2018/01/18
EGF receptor kinase suppresses ciliogenesis through activation of USP8 deubiquitinase
2017/11/23
Chemokines protect vascular smooth muscle cells from cell death induced by cyclic mechanical stretch.
2017/07/29
New photic stimulating system with white light-emitting diodes to elicit electroretinograms from zebrafish larvae.
2017/03/09
Potential protective function of the sterol regulatory element binding factor 1-fatty acid desaturase 12 axis in early-stage age-related macular degeneration
2016/07/11
Activation of Sterol Regulatory Element Binding Factors by Fenofibrate and Gemfibrozil Stimulates Myelination in Zebrafish
2016/06/14
Downregulation of GSTK1 Is a Common Mechanism Underlying Hypertrophic Cardiomyopathy
2016/06/07
Comparative Transcriptome Analysis Identifies CCDC80 as a Novel Gene Associated with Pulmonary Arterial Hypertension
2016/06/06
Establishment of a drug evaluation model against light-induced retinal degeneration using adult pigmented zebrafish

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2001/01/01
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Loss of nuclear localization of the S100C protein in immortalized human fibroblasts.

M Sakaguchi,H Yamada,T Tsuji,Y Inoue, M Miyazaki,T Tanaka,M Namba
RADIATION RESEARCH 155,208 -214 2001

Abstract

It is well known that cancer develops through a multistep process. In vitro transformation studies of normal human cells have shown that the immortalization step is critical for neoplastic transformation of cells. Furthermore, studies of cell fusion between normal and immortalized cells have indicated that the normal phenotype is dominant and the immortal phenotype is recessive. Thus we looked for cellular proteins that were down-regulated in immortalized human cells by two-dimensional gel electrophoresis to elucidate the mechanisms of immortalization of human cells. We found that the S100C protein was down-regulated in immortalized cells. This protein was localized in the cytoplasm of cells at the semiconfluent stage, while at the confluent stage it moved into the nuclei of normal cells but not into those of immortalized cells. Microinjection of an S100C antibody into normal confluent cells diminished the level of nuclear S100C protein, resulting in DNA synthesis. Taken together, loss of nuclear localization of the S100C protein, which may be related to DNA synthesis, is thought to be one of the mechanisms of immortalization.

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  • Pubmed