Abstract
Increased dietary fat intake and rate of breastepithelial cell proliferation have each been associated withthe development of breast cancer. The goal ofthis study was to measure the effect ofa low fat, high carbohydrate diet on therate of breast epithelial cell proliferation in womenat high risk for breast cancer. Women wererecruited from the intervention and control groups ofa randomized low fat dietary intervention trial, breastepithelial cells were obtained by fine needle aspiration,and cell proliferation was assessed in these samplesusing immunofluorescent detection of Ki-67 and PCNA. Theeffects of needle size and study group oncell yield and cytologic features of the cellswere also examined. Fifty three women (20 inthe intervention group and 33 in the controlgroup) underwent the biopsy procedure. Slides from 38subjects were stained for Ki-67 and from 14subjects for PCNA. No cell proliferation (fluorescence) wasdetected for either Ki-67 or PCNA in anyof the slides. Epithelial cell yield and numberof stromal fragments were greater with a largerneedle size. Numbers of stromal fragments and bipolarnaked nuclei were greater in the low fatas compared to the control group but nodifferences in epithelial cell yield were observed betweenthe two groups. This study confirms that fineneedle aspiration biopsy is a feasible method ofobtaining epithelial cells from women without discrete breastmasses, but suggests that cell proliferation cannot beassessed using Ki-67 and PCNA in such samples.
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Miller, N.A., Thomas, M., Martin, L.J. et al. Feasibility of obtaining breast epithelial cells from healthy women for studies of cellular proliferation. Breast Cancer Res Treat 43, 201–210 (1997). https://doi.org/10.1023/A:1005784628237
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DOI: https://doi.org/10.1023/A:1005784628237