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Table 1 Percentages of receptor positive cells in the entire epithelium

From: Estrogen receptor-α and progesterone receptor are expressed in label-retaining mammary epithelial cells that divide asymmetrically and retain their template DNA strands

Time point

Percentages

 

ER-α+

PR+

Week 6

28.4 ± 2.1

31.8 ± 1.4

Week 11

30.7 ± 1.35

31.6 ± 3.1

Week 11 (group I)

28.3

26.3

Week 11 (group II)

35.0

26.1

Week 11 (group III)

24.2

30.4

Week 12 (group I)

26.4 ± 5.5

25.7 ± 1.6

Week 12 (group II)

24.4 ± 1.7

24.9 ± 2.1

Week 12 (group III)

23.2 ± 2.7

24.9 ± 1.5

  1. One thousand epithelial cells were counted in mammary gland sections stained for ER-α or PR. Group I animals received estradiol injections; group II received estradiol and progesterone; and group III received estradiol, progesterone, and prolactin. ER, estrogen receptor; PR, progesterone receptor.