陈赛蓉等

摘 要 目的:探讨细胞视黄酸结合蛋白(cellular retinoic acid-binding protein Ⅱ,CRABPⅡ)和表皮脂肪酸结合蛋白(epidermal fatty acid-binding protein,E-FABP)的差异表达在乳腺癌中的意义,以及与临床病理特征和分型的关系。方法:分析123例浸润性乳腺癌患者的临床资料,采用免疫组化法检测乳腺癌组织中CRABPⅡ和E-FABP的表达。结果:CRABPⅡ和E-FABP在浸润性乳腺癌的表达存在显着差异(P<0.01)。此差异表达分为E-FABP≥CRABPⅡ与E-FABP﹤CRABPⅡ两种。在浸润性乳腺癌中,E-FABP≥CRABPⅡ的表达较多见。CRABPⅡ和E-FABP的差异表达与腋窝淋巴结转移和TNM分期有关(P<0.05)。差异表达与病理分型相关,Luminal A型中E-FABP≥CRABPⅡ的百分率最低(61.6%),Basal-like型中的百分率最高(95.2%)。结论:在浸润性乳腺癌中,CRABPⅡ和E-FABP的差异表达可能与乳腺癌的侵袭性及预后相关,E-FABP≥CRABPⅡ时的乳腺癌侵袭性高、预后差。

关键词 浸润性乳腺癌 细胞视黄酸结合蛋白 表皮脂肪酸结合蛋白 临床病理特征 病理分型

中图分类号:R737.9/R730.7 文献标志码:A 文章编号:1006-1533(2014)10-0020-05

ABSTRACT Objective: To explore the significance of the different expressions of cellular retinoic acid-binding protein Ⅱ (CRABPⅡ) and epidermal fatty acid-binding protein (E-FABP) in the breast cancer and the relationship of their clinical pathological features and types. Methods: The clinical data on 123 cases with invasive breast cancer were analyzed and the expressions of CRABPⅡ and E-FABP were detected by immunohistochemistry in the breast cancer tissues. Results: There existed different expressions between CRABⅡ and E–FABP in the invasive breast cancer (P<0.01), which could be classified into two types of E-FABP≥CRABPⅡ and E-FABP

KEY WORDS invasive breast cancer; retinoic acid-binding protein II; epidermal fatty acid-binding protein; clinical pathological feature; pathological types

据统计,我国每年乳腺癌发病16.9万,是女性最常见的恶性肿瘤[1]。近年来的研究显示,细胞视黄酸结合蛋白(cellular retinoic acid-binding protein Ⅱ,CRABPⅡ)和表皮脂肪酸结合蛋白(epidermal fatty acid-binding protein,E-FABP)作为维甲酸的转运蛋白,参与维甲酸调节细胞分化,调控细胞周期,诱导细胞凋亡。

CRABPⅡ参与抑制细胞生长,而E-FABP参与促进细胞增殖。两者在维甲酸信号通路上发挥不同的作用,从相反两方面影响细胞的增殖和凋亡[2]。E-FABP 在乳腺浸润性导管癌组织呈高表达,提示其与肿瘤的发生和发展密切相关[3],可作为乳腺癌的独立预后指标[4]。CRABPⅡ能抑制肿瘤细胞的增殖和侵袭,在肿瘤组织中部分表达缺失,说明其减弱或缺失与肿瘤的发生可能有关[2]。两者的差异表达与乳腺癌的发生发展及预后可能相关。为进一步明确CRABPⅡ和E-FABP的差异表达在乳腺癌中的意义,本研究采用免疫组化法检测CRABPⅡ和E-FABP在浸润性乳腺癌中的表达,探讨两者的差异表达与临床病理特征和乳腺癌病理分型的关系。

材料与方法

资料

从2012年1月至5月黄浦区中心医院收治女性乳腺癌患者中收集具有完整临床资料的123例为研究对象,年龄32~85岁,中位年龄 54岁。患者的临床病理资料完整,包括肿块大小、腋窝淋巴结转移数目、组织类型,以及雌激素受体(estrogen receptor, ER)、孕激素受体(progesterone receptor, PR)、人表皮生长因子受体-2(human epidermal growth receptor-2, HER-2)、ki-67和荧光原位杂交(FISH)检测结果。根据2012年WHO乳腺肿瘤组织学分类标准[5],123例中非特殊型浸润性癌99例,特殊亚型24例,包括浸润性筛状癌、浸润性小叶癌、黏液癌、伴神经内分泌癌特征的乳腺癌、化生性癌。根据2009年UICC/AJCC乳腺癌病理 TNM分期标准,I期50例,Ⅱ期53例,Ⅲ期20例。所有患者均接受乳腺癌改良根治术或根治术,术前未行放、化疗和免疫治疗。讨论

本研究中,在浸润性乳腺癌中表达率各不同,两者的表达存在差异。浸润性乳腺癌中表达较多见,即E-FABP在浸润性乳腺癌的阳性分布较CRABPⅡ占优势,可能与两者在维甲酸调节细胞作用不同有关。Schug等[11]的研究认为这两种结合蛋白的差异表达,会引起维甲酸产生不同的效应。CRABPⅡ/E-FABP呈高比例时,主要通过维甲酸受体通路,发挥促凋亡作用;相反,当CRABPⅡ/E-FABP呈低比例时,则主要通过过氧化物酶体增殖物激活受体通路,发挥促增殖的作用。维甲酸受体和过氧化物酶体增殖物激活受体可以存在于同一种细胞或同一细胞中,细胞中CRABPⅡ和E-FABP的比例关系决定维甲酸激活何种核受体,从而影响细胞的增殖和凋亡。

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(收稿日期:2014-03-08)

Schug TT, Berry DC, Shaw NS, et al. Opposing effects of retinoic acid on cell growth result from alternate activation of two different nuclear receptors[J]. Cell, 2007, 129(4): 723-733.

Huseein MR, Abd-Elwahed SR, Abdulwahed AR. Alterations of estrogen receptors, progesterone receptors and CerbB2 oncogene protein expression in ductal carcinomas of the breast[J]. Cell Boil Int, 2008, 32(6): 698-707.

Strauss B. Best hope or last hope:access to phase Ⅲ clinical trials of HER2/neu for advanced stage breast cancer patients[J]. J Adv Nurs, 2000, 31(2): 259-266.

Engel RH, Kaklamani VG. HER2-positive breast cancer: current and future treatment strategies[J]. Drugs, 2007, 67(9): 1329-1341.

Matos I, Dufloth R, Alvarenga M, et al. p63, cytokeratin 5, and P-cadherin: three molecular markers to distinguish basal phenotype in breast carcinomas[J]. Virchows Arch, 2005, 447(4): 688-694.

Harbeck N, Thomssen C, Gnant M. St. Gallen 2013: brief preliminary summary of the consensus discussion[J]. Breast Care (Basel), 2013, 8(2): 102-109.

孟红, 刘倩, 吴宁, 等. 细胞视黄酸结合蛋白Ⅱ、表皮型脂肪酸结合蛋白及Ki-67在乳腺浸润性导管癌中的表达及相关性[J]. 华西医学, 2013, 28(9): 1415-1419.

(收稿日期:2014-03-08)

Schug TT, Berry DC, Shaw NS, et al. Opposing effects of retinoic acid on cell growth result from alternate activation of two different nuclear receptors[J]. Cell, 2007, 129(4): 723-733.

Huseein MR, Abd-Elwahed SR, Abdulwahed AR. Alterations of estrogen receptors, progesterone receptors and CerbB2 oncogene protein expression in ductal carcinomas of the breast[J]. Cell Boil Int, 2008, 32(6): 698-707.

Strauss B. Best hope or last hope:access to phase Ⅲ clinical trials of HER2/neu for advanced stage breast cancer patients[J]. J Adv Nurs, 2000, 31(2): 259-266.

Engel RH, Kaklamani VG. HER2-positive breast cancer: current and future treatment strategies[J]. Drugs, 2007, 67(9): 1329-1341.

Matos I, Dufloth R, Alvarenga M, et al. p63, cytokeratin 5, and P-cadherin: three molecular markers to distinguish basal phenotype in breast carcinomas[J]. Virchows Arch, 2005, 447(4): 688-694.

Harbeck N, Thomssen C, Gnant M. St. Gallen 2013: brief preliminary summary of the consensus discussion[J]. Breast Care (Basel), 2013, 8(2): 102-109.

孟红, 刘倩, 吴宁, 等. 细胞视黄酸结合蛋白Ⅱ、表皮型脂肪酸结合蛋白及Ki-67在乳腺浸润性导管癌中的表达及相关性[J]. 华西医学, 2013, 28(9): 1415-1419.

(收稿日期:2014-03-08)