Loss of VLA‐2 Collagen Receptor in Breast Carcinoma, Facilitating Invasion and Metastasis

Loss of VLA‐2 Collagen Receptor in Breast Carcinoma, Facilitating Invasion and Metastasis
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乳腺癌中 VLA-2 胶原蛋白受体缺失,促进侵袭和转移

DOI:
10.1111/j.1349-7006.1993.tb02036.x
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发表时间:
1993
期刊:
Japanese Journal of Cancer Research : Gann
影响因子:
--
通讯作者:
T. Toge
T. Toge
中科院分区:
--
文献类型:
--
作者:
K. Arihiro;K. Inai;Kanji Kurihara;Shinpei Takeda;M. Kaneko;K. Kuroi;T. Toge

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在正常、良性肿瘤和乳腺癌组织中通过免疫组织化学方法检测到作为胶原蛋白受体的整合素 VLA-2 和作为纤连蛋白受体的 VLA-5。在一些癌症病例中,通过蛋白质印迹分析也检测到了这两种蛋白质。在所有情况下,正常乳腺和良性肿瘤的上皮细胞和肌上皮细胞对质膜中的 VLA-2 均呈免疫反应。 67 例中有 31 例 (46%) 侵袭性成分的癌细胞对 VLA-2 没有免疫反应。 36例中,导管内成分中的癌细胞仅4例(11%)呈VLA-2阴性,20例(56%)呈弱表达,12例(33%)呈强表达。除 1 例外,6 例淋巴结中的转移性癌细胞未显示出免疫反应性,而除 1 例外,原发肿瘤中的癌细胞确实显示出 VLA-2 表达。对于VLA-5,其在侵袭性成分和导管内成分中的表达没有差异。这些发现表明VLA-2的缺失在乳腺癌的侵袭和转移中发挥作用。
The integrin VLA‐2 as a collagen receptor and VLA‐5 as a fibronectin receptor were detected immunohistochemically in normal, benign tumor and carcinoma tissues of the breast. Both proteins were also detected by Western‐blot analysis in some carcinoma cases. Epithelial and myoepitheiial cells of both normal breast and benign tumor were in all cases immunoreactive for VLA‐2 in the plasma membrane. Carcinoma cells in the invasive component were not immunoreactive for VLA‐2 in 31 (46%) of 67 cases. Carcinoma cells in the intraductal components were negative for VLA‐2 in only 4 (11%) of 36 cases, while 20 cases (56%) showed weak expression and 12 cases (33%) showed strong expression. Metastatic carcinoma cells in the lymph nodes of 6 cases showed no immunoreactivity except in one case, whereas, again with the exception of one case, the carcinoma cells in the primary tumors did show VLA‐2 expression. With regard to VLA‐5, there was no difference in its expression in the invasive components and the intraductal components. These findings suggest that the loss of VLA‐2 plays a role in the invasion and metastasis of breast carcinoma.
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