p53 nuclear accumulation and ERalpha expression in ductal hyperplasia of breast in a cohort of 215 Chinese women.

Abstract:

INTRODUCTION:Women with ductal hyperplasia including usual ductal hyperplasia (UDH) and atypical ductal hyperplasia (ADH) have an increased risk of developing invasive ductal carcinoma (IDC) of breast. The importance of several molecular markers in breast cancer has been of considerable interest during recent years such as p53 and estrogen receptor alpha (ERalpha). However, p53 nuclear accumulation and ERalpha expression have not been assessed in ductal hyperplasia co-existing with ductal carcinoma in situ (DCIS) or IDC versus pure ductal hyperplasia without DCIS or IDC. MATERIALS AND METHODS:We investigated p53 nuclear accumulation and ERalpha expression in breast ductal hyperplasia in a cohort of 215 Chinese women by immunohistochemistry (IHC), which included 129 cases of pure ductal hyperplasia, 86 cases of ductal hyperplasia co-existing with DCIS (41 cases) or IDC (45 cases). RESULTS:Nuclear p53 accumulation was identified in 22.8% of ADH (31/136), 41.5% of DCIS (17/41) and 42.2% of IDC (19/45), and no case of UDH (0/79). No difference in nuclear p53 accumulation was observed between pure ADH and ADH co-existing with DCIS (ADH/DCIS) or IDC (ADH/IDC) (P>0.05). The positive rate of ERalpha expression was lower in ADH (118/136, 86.8%) than that in UDH (79/79, 100%) (P<0.001), but higher than that in DCIS (28/41, 68.3%) or IDC (26/45, 57.8%) respectively (P<0.001). The frequency of ERalpha expression was lower in ADH/DCIS (23/29, 79.31%) and ADH/IDC (23/30, 76.67%) than that in pure ADH (72/77, 93.51%) respectively (P<0.05). There was a negative weak correlation between p53 nuclear accumulation and ERalpha expression as for ADH (coefficient correlation -0.51; P<0.001). CONCLUSIONS:Different pathological types of ductal hyperplasia of breast are accompanied by diversity in patterns of nuclear p53 accumulation and ERalpha expression. At least some pure ADH is molecularly distinct from ADH/CIS or ADH/IDC which indicated the two types of ADH are molecularly distinct entities although they have the same morphological appearance.

journal_name

J Exp Clin Cancer Res

authors

Mao XY,Fan CF,Zheng HC,Wei J,Yao F,Jin F

doi

10.1186/1756-9966-29-112

subject

Has Abstract

pub_date

2010-08-16 00:00:00

pages

112

eissn

0392-9078

issn

1756-9966

pii

1756-9966-29-112

journal_volume

29

pub_type

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