Flash labelling of S-phase cells in short-term organ culture of normal and pathological human endometrium using bromodeoxyuridine and tritiated thymidine

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Abstract
Normal hyperplastic and malignant endometrial specimens were labelled in vitro with bromodeoxyuridine (BrdU). S‐phase cells were stained after DNA denaturation, using a monoclonal antibody to BrdU and an indirect immuno‐peroxidase method. Various conditions for BrdU uptake, DNA denaturation, and staining were tested. BrdU labelling was compared with autoradiography using tritiated thymidine, with good correlation. Glandular labelling indices of proliferative endometrium were significantly higher than both secretory and hyperplastic endometrium but were similar to carcinoma. Stromal labelling showed the same trend but the differences were not statistically significant.