乳腺病变组织中BcL-2,p53蛋白的表达
作者:蒋杞英 牛保华 俞智君 王建军
单位:蒋杞英 牛保华 王建军(开封医学高等专科学校病理解剖学教研室,河南 开封 475001);俞智君(开封市第二人民医院)
关键词:乳腺;Bcl-2;p53;增生;导管原位癌
第四军医大学学报001036 摘 要:目的 观察Bcl-2,p53蛋白在浸润前系列乳腺病变(包括正常乳腺组织、导管增生、不典型导管增生、小叶增生、导管原位癌)组织中的表达. 方法 采用免疫组化方法检测15例正常乳腺组织、18例导管增生、10例不典型导管增生(atypical ductal hyperplasia,ADH)、10例小叶增生,45例导管原位癌(ductal carcinoma in situ,DCIS)的Bcl-2和p53蛋白的表达. 结果 Bcl-2蛋白在正常乳腺组织、导管增生、ADH、小叶增生组织中均阳性,而p53蛋白染色阴性. DCIS病例中,Bcl-2蛋白表达阳性34例(76%),而p53蛋白阳性11例(24%). Bcl-2蛋白表达与DCIS组织学分级密切相关(P<0.01),67%DICS病例表现为Bcl-2+/p53-表达表型,还有33%不同于正常的表型(包括所有Bcl-2-/p53+表型)多代表差分化病例. 结论 Bcl-2蛋白在正常乳腺组织、导管增生、ADH、小叶增生组织中均有表达且高于乳腺DCIS. 大部分DCIS病例表现为Bcl-2+/p53-表型,与正常乳腺上皮、良性增生病变一致.
, 百拇医药
中图号:R739.97 文献标识码:A
文章编号:1000-2790(2000)10-1283-03
Expression of Bcl-2 and p53 protein in breast lesions
JIANG Qi-Ying,NIU Bao-Hua,WANG Jian-Jun
(Department of Pathoanatomy,Kaifeng Medical College,Kaifeng 475001,China)
YU Zhi-Jun
(Kaifeng Second Municipal People's Hospital)
, 百拇医药
Abstract:AIM Expressions of Bcl-2 and p53 protein were studied in various breast lesions(including normal breast tissue,ductal hyperplasia,atypical ductal hyperplasia(ADH),lobular hyperplasia and ductal carcinoma in situ(DICS). METHODS By immunohistochemistry Bcl-2 and p53 expression were studied in cases of normal breast tissue(n=15),ductal hyperplasia(n=18),atypical ductal hyperplasia(n=10),lobular hyperplasia(n=10) and ductal carcinoma in situ (n=45). RESULTS Bcl-2 protein was expressed in the epithelial cells in all normal breast tissue,ductal hyperplasia,ADH,lobular hyperplasia,and no immunoreactivity for the p53 protein was seen in these lesions. Bcl-2 expression was present in 34(76%) of 45 DCIS cases. However,11(24%)of the DCIS cases were p53 positive. Bcl-2 protein expression was related to the histologic grade of DCIS(P<0.01). The Bcl-2+/p53-phenotype was observed in 67% of the DCIS cases. In contrast,the remaining 33% of DCIS cases showed combinations of Bcl-2 and p53 protein expression,which differed from that of normal breast epithelium and the other kinds of lesions were studied. Most lesions with altered Bcl-2/p53+phenotypes, including all Bcl-2-/p53+ cases,represented examples of poorly differentiated DCIS. CONCLUSION The Bcl-2 protein is consistently expressed in normal breast epithelium, ductal hyperplasia,ADH, and lobular hyperplasia,and is found to be higher in these lesions than in breast DCIS. Among DCIS cases,Bcl-2 protein is more common in well differentiated and intermediately differentiated lesions. Most of DCIS lesions are Bcl-2+/p53-,similar to normal epithelium and benign proliferative lesions.
, http://www.100md.com
Keywords:breast;Bcl-2;p53;hyperplasia;ductal carcinoma in situ
0 引言
近年来,人们认为肿瘤的发生不仅与细胞过度增殖相关,也与细胞凋亡的减少有关[1]. Bcl-2基因是一种抑凋亡基因,而p53也参与细胞凋亡的调节过程,野生型p53可能促进细胞凋亡,突变型p53则抑制细胞凋亡[2]. 浸润性乳腺癌Bcl-2蛋白表达58%~80%,且与好的预后参数有关,如低组织学分级、低增殖率、雌孕激素受体阳性等[3,4]. 而有关乳腺正常组织及导管原位癌目前国内详细报道少. 我们将Bcl-2和p53两种基因蛋白结合起来对浸润前系列乳腺病变进行研究.
1 材料和方法
1.1 材料 1995/1998手术切除,正常乳腺组织15例,乳腺良性增生病变38例[导管增生18例,不典型导管增生(atypical ductal hyperplasia, ADH)10例]小叶增生10例,导管原位癌(ductal carcinoma in situ,DCIS)45例. 患者均为女性,平均年龄39.5(21~56)岁,乳腺病理学分类和DCIS组织学分级标准参照文献[5,6]. 坏死也作为观察项目之一.
, http://www.100md.com
1.2 方法 用免疫组织化学技术S-P法检测Bcl-2蛋白及p53蛋白. 所用试剂为北京中山公司产品,Bcl-2(clone 124)1∶40稀释,p53(clone co-7)1∶40稀释,用已知的阳性片作对照. Bcl-2蛋白染色为核膜、核膜周围胞质着色,阳性细胞>10%为阳性病例. p53蛋白染色为核着色,阳性细胞>10%为阳性病例.
统计学处理:采用四格表分析,χ2检验.
2 结果
Bcl-2蛋白在所有正常乳腺组织、导管增生、ADH及小叶增生均阳性(100%),而p53蛋白染色阴性. DCIS病例,Bcl-2蛋白染色阳性34例(76%);而p53蛋白染色阳性11例(24%).
2.1 Bcl-2,p53蛋白与DCIS分级的关系 Bcl-2蛋白表达与分化好密切相关(P<0.01,Tab 1).
, http://www.100md.com
表 1 Bcl-2和p53蛋白表达与DCIS分级的关系
Tab 1 Relationship between Bcl-2,p53 proteins and ductal carcinoma in situ grade
(%) DCIS grade differentiation
n
Bcl-2+
p53+
Well
11
11(100)
0(0)
, 百拇医药
Intermediately
21
19(90)
3(14)
Poorly
13
4(31)b
8(62)b
bP<0.01 vs well % intermediat.
2.2 Bcl-2与p53蛋白表达的关系 DCIS 45例中,有30例(67%)表现为Bcl-2+/p53-表型,这与正常乳腺组织,导管增生、不典型导管增生、乳腺小叶增生一样,认为是正常或生理性表型. 这种表型多见于高分化和中分化DCIS病例(Tab 2). DCIS病例中,有15例(33%)不同于正常Bcl-2+/p53-表型,这种表型(包括所有Bcl-2-/p53+病例)多代表差的分化病例. 在45例DCIS病例中. 差分化中有12/13(92%)出现坏死,中分化13/21(62%),高分化中没有坏死出现. 坏死易出现在差分化DCIS病例,Bcl-2阳性病例坏死出现少,p53蛋白阳性病例坏死出现率高(P<0.05). 另外,坏死在Bcl-2+/p53-表型出现机率明显少于其他表型的出现率(P<0.01).
, 百拇医药
表 2 Bcl-2/p53表型与DCIS分级及坏死出现的关系
Tab 2 Relationship between Bcl-2/p53 phenotype and ductal carcinoma in situ grade and necrosis
DCIS grade differentiation
Bcl-2/p53
Necrosis
phenotype
Well
Intermediate
poor
, http://www.100md.com
%
Bcl-2+/p53-
11
16
3
11(37)
Bcl-2-/p53+
0
0
6
5(83)
Bcl-2+/p53+
0
, 百拇医药
3
2
5(100)
Bcl-2-/p53-
0
2
2
4(100)
Total
11
21
13
25(56)
, 百拇医药
3 讨论
凋亡是普遍存在于肿瘤细胞的一个特征,抑制细胞的凋亡似乎为肿瘤快速生长,减慢丢失提供了优势条件. Bcl-2蛋白在浸润乳癌方面的研究已有文献[3,4]报道. 我们的实验发现正常乳腺组织及良性增生病变Bcl-2蛋白表达100%,高于乳腺DCIS的表达(76%). Leek等[3]报道7例良性乳腺病变Bcl-2蛋白表达,没有进一步分类. 黄志清等[7]报道:乳腺良性病变Bcl-2蛋白表达阳性率仅76%,未提到正常乳腺组织及DCIS. p53蛋白在正常乳腺组织、良性增生病变中表达均阴性,此与文献[8]一致. 我们发现Bcl-2蛋白表达主要见于高分化和中分化DCIS病例,而p53蛋白主要见于差分化DCIS病例,此结果类似文献[3,4,9]在浸润乳癌中的报道“Bcl-2蛋白染色与乳腺癌好的预后参数有关,而p53蛋白染色与差的预后有关”的观点.
DCIS病例中,大部分表现为Bcl-2+/p53-表型,与正常乳腺组织、乳腺良性增生病变一致,少部分DCIS病例不同正常表型,非正常表型(包括所有Bcl-2-/p53+),多代表差分化DCIS病例,此与文献[10]的观点一致. 这进一步说明,大部分DCIS病例,乳腺良性增生病变与正常乳腺组织具有相似的基因表达表型,至少与Bcl-2,p53有关,少部分非正常表型病例,凋亡调节可能不受正常调控,结果促进肿瘤细胞的存活和肿瘤生长. 此生物学机制还有待于更深入的研究.
, 百拇医药
基金项目:河南省医药卫生科研重点项目(99059)
作者简介:蒋杞英(1966-),女(汉族),河南省开封人. 1987年河南医科大学毕业,讲师. Tel.(0378)5958866 Ext.3035
参考文献:
[1] Williams GT,Smith CA.Molecular regulation of apoptosis genetic controls on cell death [J].Cell,1993;74(6):777-780.
[2] Carson DA,Ribeiro JM. Apoptosis and disease[J].Lancet,1993; 341(9):1251-1260.
[3] Leek RD,Kaklamanis L,Pezzella F et al .bcl-2 in normal human breast and carcinoma,association with oestrogen receptor-positive,epidermal growth factor receptor-negative tumors and in situ cancer[J].Br J Cancer,1994;69(1):135-139.
, http://www.100md.com
[4] Joensuu H,Pylkkanen L,Toikkanen S.Bcl-2 protein expression and long-term survival in breast cancer[J]. Am J Pathol 1994;145(9):1191-1198.
[5] 阚 秀. 乳腺癌临床病理学[M]. 北京:北京医科大学中国协和医科大学联合出版社,1993:62-65.
[6] Holland R,Peterse JL,Millis RR et al. Ductal carcinoma in situ:A proposal for a new classification[J].Semin Diagn Pathol,1994;11(2):167-180.
[7] 黄志清,阚 秀,董建强et al. 乳腺肿物Bcl-2表达与激素调节的相关研究[J]. 中国肿瘤与临床,1997;24(2):96-99.
, http://www.100md.com
[8] Humphrey PA,Franquemont DW,Geary WA et al.Immunodetection of p53 protein in noninvasive epithelial proliferative breast disease[J].Appl Immunohistochem, 1994;2(1):22-28.
[9] Kovach JS,Hartmann A,Blaszyk H et al.Mutation detection by highly sensitive methods indicates that p53 gene mutations in breast cancer can have important prognostic value[J].Proc Natl Acad Sci USA,1996;93(9):1093-1096.
[10] Bobrow LG,Happerfield LG,Gregory WM et al. The classification of ductal carcinoma in situ and its association with biological markers[J].Semin Diagn Pathol, 1994;11(2):199-207.
收稿日期:1999-12-21; 修回日期:2000-01-04, http://www.100md.com
单位:蒋杞英 牛保华 王建军(开封医学高等专科学校病理解剖学教研室,河南 开封 475001);俞智君(开封市第二人民医院)
关键词:乳腺;Bcl-2;p53;增生;导管原位癌
第四军医大学学报001036 摘 要:目的 观察Bcl-2,p53蛋白在浸润前系列乳腺病变(包括正常乳腺组织、导管增生、不典型导管增生、小叶增生、导管原位癌)组织中的表达. 方法 采用免疫组化方法检测15例正常乳腺组织、18例导管增生、10例不典型导管增生(atypical ductal hyperplasia,ADH)、10例小叶增生,45例导管原位癌(ductal carcinoma in situ,DCIS)的Bcl-2和p53蛋白的表达. 结果 Bcl-2蛋白在正常乳腺组织、导管增生、ADH、小叶增生组织中均阳性,而p53蛋白染色阴性. DCIS病例中,Bcl-2蛋白表达阳性34例(76%),而p53蛋白阳性11例(24%). Bcl-2蛋白表达与DCIS组织学分级密切相关(P<0.01),67%DICS病例表现为Bcl-2+/p53-表达表型,还有33%不同于正常的表型(包括所有Bcl-2-/p53+表型)多代表差分化病例. 结论 Bcl-2蛋白在正常乳腺组织、导管增生、ADH、小叶增生组织中均有表达且高于乳腺DCIS. 大部分DCIS病例表现为Bcl-2+/p53-表型,与正常乳腺上皮、良性增生病变一致.
, 百拇医药
中图号:R739.97 文献标识码:A
文章编号:1000-2790(2000)10-1283-03
Expression of Bcl-2 and p53 protein in breast lesions
JIANG Qi-Ying,NIU Bao-Hua,WANG Jian-Jun
(Department of Pathoanatomy,Kaifeng Medical College,Kaifeng 475001,China)
YU Zhi-Jun
(Kaifeng Second Municipal People's Hospital)
, 百拇医药
Abstract:AIM Expressions of Bcl-2 and p53 protein were studied in various breast lesions(including normal breast tissue,ductal hyperplasia,atypical ductal hyperplasia(ADH),lobular hyperplasia and ductal carcinoma in situ(DICS). METHODS By immunohistochemistry Bcl-2 and p53 expression were studied in cases of normal breast tissue(n=15),ductal hyperplasia(n=18),atypical ductal hyperplasia(n=10),lobular hyperplasia(n=10) and ductal carcinoma in situ (n=45). RESULTS Bcl-2 protein was expressed in the epithelial cells in all normal breast tissue,ductal hyperplasia,ADH,lobular hyperplasia,and no immunoreactivity for the p53 protein was seen in these lesions. Bcl-2 expression was present in 34(76%) of 45 DCIS cases. However,11(24%)of the DCIS cases were p53 positive. Bcl-2 protein expression was related to the histologic grade of DCIS(P<0.01). The Bcl-2+/p53-phenotype was observed in 67% of the DCIS cases. In contrast,the remaining 33% of DCIS cases showed combinations of Bcl-2 and p53 protein expression,which differed from that of normal breast epithelium and the other kinds of lesions were studied. Most lesions with altered Bcl-2/p53+phenotypes, including all Bcl-2-/p53+ cases,represented examples of poorly differentiated DCIS. CONCLUSION The Bcl-2 protein is consistently expressed in normal breast epithelium, ductal hyperplasia,ADH, and lobular hyperplasia,and is found to be higher in these lesions than in breast DCIS. Among DCIS cases,Bcl-2 protein is more common in well differentiated and intermediately differentiated lesions. Most of DCIS lesions are Bcl-2+/p53-,similar to normal epithelium and benign proliferative lesions.
, http://www.100md.com
Keywords:breast;Bcl-2;p53;hyperplasia;ductal carcinoma in situ
0 引言
近年来,人们认为肿瘤的发生不仅与细胞过度增殖相关,也与细胞凋亡的减少有关[1]. Bcl-2基因是一种抑凋亡基因,而p53也参与细胞凋亡的调节过程,野生型p53可能促进细胞凋亡,突变型p53则抑制细胞凋亡[2]. 浸润性乳腺癌Bcl-2蛋白表达58%~80%,且与好的预后参数有关,如低组织学分级、低增殖率、雌孕激素受体阳性等[3,4]. 而有关乳腺正常组织及导管原位癌目前国内详细报道少. 我们将Bcl-2和p53两种基因蛋白结合起来对浸润前系列乳腺病变进行研究.
1 材料和方法
1.1 材料 1995/1998手术切除,正常乳腺组织15例,乳腺良性增生病变38例[导管增生18例,不典型导管增生(atypical ductal hyperplasia, ADH)10例]小叶增生10例,导管原位癌(ductal carcinoma in situ,DCIS)45例. 患者均为女性,平均年龄39.5(21~56)岁,乳腺病理学分类和DCIS组织学分级标准参照文献[5,6]. 坏死也作为观察项目之一.
, http://www.100md.com
1.2 方法 用免疫组织化学技术S-P法检测Bcl-2蛋白及p53蛋白. 所用试剂为北京中山公司产品,Bcl-2(clone 124)1∶40稀释,p53(clone co-7)1∶40稀释,用已知的阳性片作对照. Bcl-2蛋白染色为核膜、核膜周围胞质着色,阳性细胞>10%为阳性病例. p53蛋白染色为核着色,阳性细胞>10%为阳性病例.
统计学处理:采用四格表分析,χ2检验.
2 结果
Bcl-2蛋白在所有正常乳腺组织、导管增生、ADH及小叶增生均阳性(100%),而p53蛋白染色阴性. DCIS病例,Bcl-2蛋白染色阳性34例(76%);而p53蛋白染色阳性11例(24%).
2.1 Bcl-2,p53蛋白与DCIS分级的关系 Bcl-2蛋白表达与分化好密切相关(P<0.01,Tab 1).
, http://www.100md.com
表 1 Bcl-2和p53蛋白表达与DCIS分级的关系
Tab 1 Relationship between Bcl-2,p53 proteins and ductal carcinoma in situ grade
(%) DCIS grade differentiation
n
Bcl-2+
p53+
Well
11
11(100)
0(0)
, 百拇医药
Intermediately
21
19(90)
3(14)
Poorly
13
4(31)b
8(62)b
bP<0.01 vs well % intermediat.
2.2 Bcl-2与p53蛋白表达的关系 DCIS 45例中,有30例(67%)表现为Bcl-2+/p53-表型,这与正常乳腺组织,导管增生、不典型导管增生、乳腺小叶增生一样,认为是正常或生理性表型. 这种表型多见于高分化和中分化DCIS病例(Tab 2). DCIS病例中,有15例(33%)不同于正常Bcl-2+/p53-表型,这种表型(包括所有Bcl-2-/p53+病例)多代表差的分化病例. 在45例DCIS病例中. 差分化中有12/13(92%)出现坏死,中分化13/21(62%),高分化中没有坏死出现. 坏死易出现在差分化DCIS病例,Bcl-2阳性病例坏死出现少,p53蛋白阳性病例坏死出现率高(P<0.05). 另外,坏死在Bcl-2+/p53-表型出现机率明显少于其他表型的出现率(P<0.01).
, 百拇医药
表 2 Bcl-2/p53表型与DCIS分级及坏死出现的关系
Tab 2 Relationship between Bcl-2/p53 phenotype and ductal carcinoma in situ grade and necrosis
DCIS grade differentiation
Bcl-2/p53
Necrosis
phenotype
Well
Intermediate
poor
, http://www.100md.com
%
Bcl-2+/p53-
11
16
3
11(37)
Bcl-2-/p53+
0
0
6
5(83)
Bcl-2+/p53+
0
, 百拇医药
3
2
5(100)
Bcl-2-/p53-
0
2
2
4(100)
Total
11
21
13
25(56)
, 百拇医药
3 讨论
凋亡是普遍存在于肿瘤细胞的一个特征,抑制细胞的凋亡似乎为肿瘤快速生长,减慢丢失提供了优势条件. Bcl-2蛋白在浸润乳癌方面的研究已有文献[3,4]报道. 我们的实验发现正常乳腺组织及良性增生病变Bcl-2蛋白表达100%,高于乳腺DCIS的表达(76%). Leek等[3]报道7例良性乳腺病变Bcl-2蛋白表达,没有进一步分类. 黄志清等[7]报道:乳腺良性病变Bcl-2蛋白表达阳性率仅76%,未提到正常乳腺组织及DCIS. p53蛋白在正常乳腺组织、良性增生病变中表达均阴性,此与文献[8]一致. 我们发现Bcl-2蛋白表达主要见于高分化和中分化DCIS病例,而p53蛋白主要见于差分化DCIS病例,此结果类似文献[3,4,9]在浸润乳癌中的报道“Bcl-2蛋白染色与乳腺癌好的预后参数有关,而p53蛋白染色与差的预后有关”的观点.
DCIS病例中,大部分表现为Bcl-2+/p53-表型,与正常乳腺组织、乳腺良性增生病变一致,少部分DCIS病例不同正常表型,非正常表型(包括所有Bcl-2-/p53+),多代表差分化DCIS病例,此与文献[10]的观点一致. 这进一步说明,大部分DCIS病例,乳腺良性增生病变与正常乳腺组织具有相似的基因表达表型,至少与Bcl-2,p53有关,少部分非正常表型病例,凋亡调节可能不受正常调控,结果促进肿瘤细胞的存活和肿瘤生长. 此生物学机制还有待于更深入的研究.
, 百拇医药
基金项目:河南省医药卫生科研重点项目(99059)
作者简介:蒋杞英(1966-),女(汉族),河南省开封人. 1987年河南医科大学毕业,讲师. Tel.(0378)5958866 Ext.3035
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收稿日期:1999-12-21; 修回日期:2000-01-04, http://www.100md.com