散发性乳腺癌组织中BRCA1选择性调节黄体酮受体A的表达

目的 观察散发性乳腺癌组织中BRCA1、黄体酮受体A(progesterone receptor A,PRA)和黄体酮受体B(progesterone receptor B,PRB)的表达,并分析散发性乳腺癌BRCA1对PRA和PRB表达的影响.方法 选择南方医科大学附属南方医院病理科乳腺腺病和散发性浸润性乳腺导管癌病例蜡块包埋组织各68例,应用免疫组织化学法检测散发性浸润性乳腺导管癌组织BRCA1、PRA和PRB蛋白及乳腺腺病组织BRCA1蛋白的表达,用Wilcoxon两样本检验比较浸润性导管癌和乳腺腺病BRCA1表达的高低,用x2检验分析浸润性导管癌BRCA1对PRA和PRB表达的影响.结果 (1)浸润性导管癌组织BRCA1蛋白阳性表达率为60.3%(41/68),低于乳腺腺病BRCA1蛋白阳性表达率85.3%(58/68),两者之间差异有统计学意义(P<0.01);(2)浸润性导管癌组织中,BRCA1表达阴性标本PRA的阳性率为81.5%(22/27),高于BRCA1表达阳性标本PRA的阳性率53.7%(22/47),差异有统计学意义(P<0.05),提示BRCA1可影响PRA的表达.浸润性导管癌组织中PRB的表达率在BRCA1表达阳性标本与表达阴性标本之间差异无统计学意义(P>0.05),提示BRCA1不影响PRB的表达.结论 在散发性乳腺癌组织中,BRCA1表达阴性选择性地与PRA的高表达相关联,但与PRB表达率不相关联,提示BRCA1在散发性乳腺癌组织中选择性地调节PRA的表达.

BRCA1 selectively regulates the expression of progesterone receptor A in sporadic invasive ductal breast carcinoma

Objective To investigate the expression level of BRCA1, progesterone receptor A (PRA) and B (PRB) in tissue of sporadic invasive ductal breast carcinoma and further statistically analyze the BRCA1 effects on the expression rates of PRA and PRB. Methods Sixty-eight cases of adenosis of breast and sporadic invasive ductal breast carcinoma were selected The corresponding paraffin-embodied tissues were collected from the archive of Department of Pathology, Nanfang Hospital. The expressions level of BRCA1, PRA and PRB were detected by immunohistochemistry. Wilcoxon two-sample test was used to analyze the differential expression of BRCA1 between adenosis and sporadic invasive ductal breast carcinoma. Chi-square test was used to analyze the effects of BRCA1 on the PRA or PRB expression rate. P value<0.05 was considered statistically significant Results (1) In invasive sporadic ductal breast carcinoma, the positive rate of BRCA1 expression of 60. 29% (41/68) was lower than the positive rate of BRCA1 expression at 85.30% (58/68) in adenosis of breast And the difference of BRCA1 expression between two groups was statistically significant (P< 0.01); (2) In invasive sporadic ductal breast carcinoma, the positive rate of PRA expression for negative BRCA1 expression samples was 81.48% (22/27) and it was higher than the positive rate of PRA expression at 53. 66% (22/47) for positive BRCA1 expression samples. And the difference of PRA expression rates between two groups was statistically significant (P<0. 05).It indicated that the expression of BRCA1 affected the expression rate of PRA; Ininvasive sporadic ductal breast carcinoma.the PRB expression rates between positive and negative BRCA1 expression samples were not statistically significant(P>0.05).It indicated that BRCA1 had no effect upon the expression rate of PRB.Conclusion In sporadic breast carcinoma.a negative expression of BRCA1 is selectively associated with a higher expression rate of PRA rather than PRB.Thus BRCA1 selectively regulates the expression of PRA in sporadic breast carcinoma.