PAQR3 expression is downregulated in human breast cancers and correlated with HER2 expression.

PAQR3 expression is downregulated in human breast cancers and correlated with HER2 expression.
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PAQR3 表达在人类乳腺癌中下调并与 HER2 表达相关

DOI:
10.18632/oncotarget.3657
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发表时间:
2015-05-20
期刊:
影响因子:
--
通讯作者:
Chen Y
Chen Y
中科院分区:
其他
文献类型:
--
作者:
Li Z;Ling ZQ;Guo W;Lu XX;Pan Y;Wang Z;Chen Y

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PAQR 3是一种新发现的肿瘤抑制因子,其在乳腺癌中的功能作用尚未得到很好的表征。我们在这里报道PAQR 3与乳腺癌患者的进展和生存以及人乳腺癌细胞的细胞增殖和迁移相关。PAQR 3 mRNA在乳腺癌组织中的表达明显低于癌旁正常组织(n = 82,P < 0.0001)。PAQR 3 mRNA水平与HER 2表达呈负相关(P < 0.0001),与患者的无病生存期呈负相关(P < 0.0001)。PAQR 3过表达抑制乳腺癌细胞包括MCF 7、SKBR 3、MDA-MD-231、MDA-MD-468和MDA-MD-453细胞的细胞增殖、集落形成和迁移。MDA-MD-231细胞中PAQR 3的敲低提高了细胞增殖和迁移。曲妥珠单抗对HER 2的抑制增加了SKBR 3细胞中PAQR 3的表达。总之,PAQR 3表达在人乳腺癌中经常下调,与HER 2表达呈负相关。PAQR 3能够调节乳腺癌细胞的增殖和迁移。我们的数据表明PAQR 3在人类乳腺癌的发展中起肿瘤抑制剂的作用。
PAQR3 is a newly discovered tumor suppressor and its functional role in breast cancer has not been well characterized. We report here that PAQR3 is associated with the progression and survival of human patients with breast cancer, as well as cell proliferation and migration of human breast cancer cells. PAQR3 mRNA level was robustly downregulated in human breast cancer samples compared with their corresponding para-cancerous histological normal tissues (n = 82, P < 0.0001). The mRNA level of PAQR3 was negatively correlated with HER2 expression (P < 0.0001) and disease-free survival of the patients (P < 0.0001). PAQR3 overexpression inhibited cell proliferation, colony formation and migration of breast cancer cells including MCF7, SKBR3, MDA-MD-231, MDA-MD-468 and MDA-MD-453 cells. Knockdown of PAQR3 in MDA-MD-231 cells elevated cell proliferation and migration. Inhibition of HER2 by trastuzumab increased PAQR3 expression in SKBR3 cells. In conclusion, PAQR3 expression is frequently downregulated in human breast cancers inversely correlated with HER2 expression. PAQR3 is able to modulate the proliferation and migration of breast cancer cells. Our data indicate that PAQR3 functions as a tumor suppressor in the development of human breast cancers.
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