Nuclear texture and chromatin structure in OV1/VCR human multidrug-resistant cell line
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- Published online on: October 1, 2003 https://doi.org/10.3892/ijo.23.4.1225
- Pages: 1225-1230
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Abstract
Previous studies have demonstrated that multidrug-resistant leukemic cells displayed nuclear texture changes. In this work, the human ovarian carcinoma cell line IGROV1 and its multidrug-resistant variant OV1/VCR were studied. Cell smears of these cell populations were analysed by image cytometry. As compared to sensitive cells, OV1/VCR display a chromatin global decondensation as assessed by textural features analysis. In order to correlate this decondensation with alterations in chromatin structure, DNase I was used. OV1/VCR DNA displayed an increased DNase I sensitivity, suggesting an increased chromatin accessibility. Furthermore, OV1/VCR cells displayed an increased level in acetylated histone H4, a mechanism known to be associated with transcriptionally active chromatin and relaxed chromatin conformation.