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Correlation between nuclear morphology and rate of deoxyribonucleic acid synthesis in a normal cell line

P Dormer and W Abmayr

Chinese hamster fibroblasts were investigated for the existence of correlations between proliferative activity and nuclear morphology. As a proliferative parameter, the rate of DNA synthesis of individual cells was determined by quantitative 14C-autoradiography. In a second step the images of the Feulgen-stained nuclei were digitized for extraction of features of morphology and texture. These features were correlated with the corresponding DNA synthesis rate values. The following relationships were found: Round nuclei have higher rates of DNA synthesis than flat ones. The more chromatin is packed at the nuclear rim, possibly representing heterochromatin, the lower the rate of DNA synthesis. The DNA synthesis rate also correlates with the graininess of chromatin. Larger areas of condensed chromatin are associated with lower rate values. A fine and irregular network of chromatin, as is typical of immature cell types, is associated with a high rate of DNA synthesis. Although these results are presently confined to the cell line investigated, parallels seem to exist to other cell types, such as erythropoietic cells, which await further investigation.

Volume 27, Issue 1, pp. 188-192, 01/01/1979
Copyright © 1979 by The Histochemical Society


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