cellular
• in MEFs at later time points after OHT treatment and serum addition cells develop large aberrant nuclei with frequent micronuclei
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• in MEFS after OHT treatment and serum addition increases in the population of cells with 4N and 8N DNA content are seen
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• live cell imaging indicates a median 8 h delay in mitotic entry in MEFS after OHT treatment and serum addition compared to controls
• in MEFS after OHT treatment and serum addition more cells are in prophase and most of these show an early prophase phenotype
• in MEFS after OHT treatment and serum addition almost no cells in metaphase, anaphase, and telophase are detected
• in MEFS after OHT treatment and serum addition cells in prometaphase have a monopolar spindle with closely adjacent chromosomes, the presence of these monopolar spindles activates the spindle checkpoint
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• in MEFS 28 h after OHT treatment and serum addition the percent of cells positive for PH3 is increased about 3 fold compared to controls
• however, the timing of the peak in PH3 positive cells is similar to controls
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• growth defect in MEFs following OHT treatment and serum addition
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