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- W2037651402 abstract "Primary cultured cells derived from normal tissue have a limited lifespan due to replicative senescence and show distinct phenotypes such as irreversible cell cycle arrest and enlarged morphology. Studying senescence-associated genetic alterations in chicken cells will provide valuable knowledge of cellular growth characteristics, when compared with normal and rapidly growing cell lines. Microarray analysis of early- and late-passage (passage 4 and 18, respectively) primary chicken embryo fibroblast (CEF) cells was performed with a 4X44K chicken oligo microarray. A total of 1,888 differentially expressed genes were identified with a 2-fold level cutoff that included 272 upregulated and 1,616 downregulated genes in late-passage senescent CEF cells. Bioinformatic analyses were performed using Ingenuity Pathway Analysis (IPA, http://www.ingenuity.com). Of the 1,888 differentially expressed genes in senescent CEF cells, 458 were identified as functionally known genes and only 61 genes showed upregulation. Because senescent cells generally showed the deactivated states of most cellular mechanisms for proliferation and energy metabolism, intensified analysis on upregulated genes revealed that the molecular mechanisms in senescent CEF cells are characterized by the suppression of cell cycle and proliferation, progression of cell death including apoptosis, and increased expression of various secreting factors. These regulatory pathways may be opposite to those found in the immortal CEF cell line, such as the DF-1 immortal line. Further comparison of differentially expressed genes between senescent and immortal DF-1 CEF cells showed that 35 genes overlapped and were oppositely regulated. The global gene expression profiles may provide insight into the cellular mechanisms that regulate cellular senescence and immortalization of CEF cells." @default.
- W2037651402 created "2016-06-24" @default.
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- W2037651402 date "2013-03-01" @default.
- W2037651402 modified "2023-09-27" @default.
- W2037651402 title "Microarray analysis of early and late passage chicken embryo fibroblast cells" @default.
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- W2037651402 doi "https://doi.org/10.3382/ps.2012-02540" @default.
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