Summary
The purpose of this study was to characterize breast carcinomas by cell kinetic parameters. Mitotic rate (MR) and flow cytometrically (FCM) measured cell cycle distribution as well as chromatin testing in situ employing heparin for determination of activated chromatin, provided the following results:
MR counted in 73 unselected carcinomas showed an increase up to a tumor size of 4.2cm (p < 0.05); beyond this diameter, the MR was found to decrease.
In T1-T2 carcinomas, cell cycle stage analysis yielded higher percentages of cells in S and G2M phase for ductal (13% and 12%, N = 22) than for lobular (8% and 7%, N = 8) node-negative carcinomas (p < 0.002). In ductal carcinomas, lymph node involvement was reflected by higher % G2M values (15%, N = 26) compared with negative cases (12%, N = 22) (p < 0.05).
Ductal node-positive T3-T4 carcinomas (N = 10) revealed a higher % S value (16%) than their T1-T2 counterparts. A correlation between MR and % G2M was established only up to a tumor size of 4.2 cm (r = 0.39, p < 0.05).
A highly sensitive (‘H’) and a poorly sensitive (‘P’) subgroup of carcinomas with respect to heparininduced changes in fluorescence intensity of the G1/0 peak of the DNA aneuploid cell line were identified, as previously shown [1]. These subgroups were here updated with a larger number of carcinomas and were limited to T1-T2 cancers (N = 57). Group ‘H’ included more younger patients (p < 0.005), less cases with nodal involvement in ductal carcinomas (p < 0.05), and lower % G2M values in lobular node-negative cases (p < 0.05), than group ‘P’. DNA diploid cells always existing in DNA aneuploid carcinomas are more sensitive than their aneuploid counterparts (p < 0.01); however, they strengthen the stratification to ‘H’ and ‘P’. We suggest ‘H’ carcinomas to be less aggressive than ‘P’ carcinomas. Small breast carcinomas are recommended to cell kinetic investigations for individualizing adjuvant therapy.
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Weiß, H., Brasching, HP., Bock, A. et al. Mitotic rate, DNA distribution, and chromatinin situ sensitivity to heparin in breast cancer. Breast Cancer Res Tr 16, 41–50 (1990). https://doi.org/10.1007/BF01806574
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DOI: https://doi.org/10.1007/BF01806574