陳賽蓉等
摘 要 目的:探討細胞視黃酸結合蛋白(cellular retinoic acid-binding protein Ⅱ,CRABPⅡ)和表皮脂肪酸結合蛋白(epidermal fatty acid-binding protein,E-FABP)的差異表達在乳腺癌中的意義,以及與臨床病理特征和分型的關系。方法:分析123例浸潤性乳腺癌患者的臨床資料,采用免疫組化法檢測乳腺癌組織中CRABPⅡ和E-FABP的表達。結果:CRABPⅡ和E-FABP在浸潤性乳腺癌的表達存在顯著差異(P<0.01)。此差異表達分為E-FABP≥CRABPⅡ與E-FABP﹤CRABPⅡ兩種。在浸潤性乳腺癌中,E-FABP≥CRABPⅡ的表達較多見。CRABPⅡ和E-FABP的差異表達與腋窩淋巴結轉移和TNM分期有關(P<0.05)。差異表達與病理分型相關,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%)。結論:在浸潤性乳腺癌中,CRABPⅡ和E-FABP的差異表達可能與乳腺癌的侵襲性及預后相關,E-FABP≥CRABPⅡ時的乳腺癌侵襲性高、預后差。
關鍵詞 浸潤性乳腺癌 細胞視黃酸結合蛋白 表皮脂肪酸結合蛋白 臨床病理特征 病理分型
中圖分類號:R737.9/R730.7 文獻標志碼:A 文章編號: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 據統計,我國每年乳腺癌發病16.9萬,是女性最常見的惡性腫瘤[1]。近年來的研究顯示,細胞視黃酸結合蛋白(cellular retinoic acid-binding protein Ⅱ,CRABPⅡ)和表皮脂肪酸結合蛋白(epidermal fatty acid-binding protein,E-FABP)作為維甲酸的轉運蛋白,參與維甲酸調節細胞分化,調控細胞周期,誘導細胞凋亡。 CRABPⅡ參與抑制細胞生長,而E-FABP參與促進細胞增殖。兩者在維甲酸信號通路上發揮不同的作用,從相反兩方面影響細胞的增殖和凋亡[2]。E-FABP 在乳腺浸潤性導管癌組織呈高表達,提示其與腫瘤的發生和發展密切相關[3],可作為乳腺癌的獨立預后指標[4]。CRABPⅡ能抑制腫瘤細胞的增殖和侵襲,在腫瘤組織中部分表達缺失,說明其減弱或缺失與腫瘤的發生可能有關[2]。兩者的差異表達與乳腺癌的發生發展及預后可能相關。為進一步明確CRABPⅡ和E-FABP的差異表達在乳腺癌中的意義,本研究采用免疫組化法檢測CRABPⅡ和E-FABP在浸潤性乳腺癌中的表達,探討兩者的差異表達與臨床病理特征和乳腺癌病理分型的關系。
材料與方法
資料
從2012年1月至5月黃浦區中心醫院收治女性乳腺癌患者中收集具有完整臨床資料的123例為研究對象,年齡32~85歲,中位年齡 54歲。患者的臨床病理資料完整,包括腫塊大小、腋窩淋巴結轉移數目、組織類型,以及雌激素受體(estrogen receptor, ER)、孕激素受體(progesterone receptor, PR)、人表皮生長因子受體-2(human epidermal growth receptor-2, HER-2)、ki-67和熒光原位雜交(FISH)檢測結果。根據2012年WHO乳腺腫瘤組織學分類標準[5],123例中非特殊型浸潤性癌99例,特殊亞型24例,包括浸潤性篩狀癌、浸潤性小葉癌、黏液癌、伴神經內分泌癌特征的乳腺癌、化生性癌。根據2009年UICC/AJCC乳腺癌病理 TNM分期標準,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術或根治術,術前未行放、化療和免疫治療。討論
本研究中,在浸潤性乳腺癌中表達率各不同,兩者的表達存在差異。浸潤性乳腺癌中表達較多見,即E-FABP在浸潤性乳腺癌的陽性分布較CRABPⅡ占優勢,可能與兩者在維甲酸調節細胞作用不同有關。Schug等[11]的研究認為這兩種結合蛋白的差異表達,會引起維甲酸產生不同的效應。CRABPⅡ/E-FABP呈高比例時,主要通過維甲酸受體通路,發揮促凋亡作用;相反,當CRABPⅡ/E-FABP呈低比例時,則主要通過過氧化物酶體增殖物激活受體通路,發揮促增殖的作用。維甲酸受體和過氧化物酶體增殖物激活受體可以存在于同一種細胞或同一細胞中,細胞中CRABPⅡ和E-FABP的比例關系決定維甲酸激活何種核受體,從而影響細胞的增殖和凋亡。
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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.
孟紅, 劉倩, 吳寧, 等. 細胞視黃酸結合蛋白Ⅱ、表皮型脂肪酸結合蛋白及Ki-67在乳腺浸潤性導管癌中的表達及相關性[J]. 華西醫學, 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.
孟紅, 劉倩, 吳寧, 等. 細胞視黃酸結合蛋白Ⅱ、表皮型脂肪酸結合蛋白及Ki-67在乳腺浸潤性導管癌中的表達及相關性[J]. 華西醫學, 2013, 28(9): 1415-1419.
(收稿日期:2014-03-08)