Clinical significance of expression of PI3Kp110αin breast cancer
10.3760/cma.j.issn.0253-3766.2016.10.006
- VernacularTitle:P I3 Kp110α在乳腺癌组织中的表达及其临床意义
- Author:
Yan XIONG
1
;
Jingwen SI
;
Dong LI
;
Ying WANG
;
Linlin QU
;
Hong ZHANG
;
Bo ZHANG
;
Ting LI
Author Information
1. 100034,北京大学第一医院病理科
- Keywords:
Breast neoplasms;
Carcinoma in situ;
Carcinoma,ductal,breast;
Tissues;
PI3Kp110α
- From:
Chinese Journal of Oncology
2016;38(10):743-749
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the clinical significance of PI3Kp110αexpression in breast cancer. Methods The expressions of PI3Kp110α, HER2, PTEN, p?Akt and Ki?67 in invasive ductal carcinoma ( IDC ) , adjacent ductal carcinoma in situ ( DCIS ) and normal breast tissue were detected by immunohistochemistry in 102 cases of breast cancer. The expression of PI3Kp110α in IDC was compared with those in DCIS and normal breast tissues. Correlations between expression of PI3Kp110αand expression of HER2, PTEN, p?Akt and Ki?67 index in IDC were analyzed. Correlation between expression of PI3Kp110αand stage of IDC was studied as well. Results In the normal breast tissues, there were 97 cases (95.1%) with low level and 5 cases (4.9%) with high level expression of PI3Kp110α. In the DCIS tissues, there were 67 cases ( 65. 7%) with low level and 35 cases ( 34. 3%) with high level expression of PI3Kp110α. In the IDC tissues, there were 14 cases (13.7%) with low level and 88 cases (86.3%) with high level expression of PI3Kp110α. The difference between expression of PI3Kp110α in normal breast tissue, DCIS and IDC was significant ( P<0. 001 ) . In the IDC tissues, expression of PI3Kp110α was negatively correlated with expression of HER2 ( rs=-0.213,P=0.032) and PTEN ( rs=-0.197,P=0.047) , while was not significantly correlated with expression of p?Akt ( P=0.119) and Ki?67 index ( P=0.636) . In contrast, expressions of HER?2 and p?Akt were positively correlated with Ki?67 index ( P=0. 001, P=0.035), while expression of HER2 was not correlated with p?Akt (P=0.177). Expression of PI3Kp110αwas negatively correlated with T stage and TNM stage (P=0.003, P=0.016), while not correlated with N stage and M stage(both P>0.05). Expression of HER?2 was positively correlated with T stage (P=0.037), while not correlated with N stage, M stage and TNM stage ( P>0. 05 for all ) . Neither Ki?67 index nor expression of PTEN and p?Akt (P=0.194) were correlated with T stage, N stage, M stage and TNM stage. Conclusions Expression of PI3Kp110α plays an important role in oncogenesis and development of breast cancer. Based on the fact that expression of PI3Kp110αis negatively correlated with expression of HER2 and PTEN and with T stage and TNM stage, we may conclude that increased expression of PI3Kp110αis another independent pathway in breast cancer development, and breast cancer patients with high expression of PI3Kp110α may have a better prognosis.
