Betulinic acid impairs metastasis and reduces immunosuppressive cells in breast cancer models.

Betulinic acid impairs metastasis and reduces immunosuppressive cells in breast cancer models.
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桦木酸可损害乳腺癌模型中的转移并减少免疫抑制细胞

DOI:
10.18632/oncotarget.23376
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发表时间:
2018-01-09
期刊:
影响因子:
--
通讯作者:
Wei YQ
Wei YQ
中科院分区:
其他
文献类型:
--
作者:
Zeng AQ;Yu Y;Yao YQ;Yang FF;Liao M;Song LJ;Li YL;Yu Y;Li YJ;Deng YL;Yang SP;Zeng CJ;Liu P;Xie YM;Yang JL;Zhang YW;Ye TH;Wei YQ

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乳腺癌是最常见的女性癌症,具有相当大的转移潜力,这解释了对抑制肿瘤转移的新候选物的需求。本研究对桦木酸(BA)进行了体内外抗肿瘤转移活性的评价。BA降低了三种乳腺癌细胞系的活力,并显着损害细胞的迁移和侵袭。此外,BA还能抑制STAT 3和FAK的激活,从而导致基质金属蛋白酶(MMPs)的表达减少,而TIMP-2的表达增加。此外,在我们的动物实验中,腹腔注射10 mg/kg/天BA抑制4 T1肿瘤的生长并阻断肺转移的形成,而没有明显的副作用。此外,组织学和免疫组织化学分析显示,在BA给药后,MMP-9阳性细胞、MMP-2阳性细胞和Ki-67阳性细胞减少,而裂解的caspase-3阳性细胞增加。值得注意的是,BA减少了肺和肿瘤中髓源性抑制细胞(MDSC)的数量。有趣的是,在我们的尾静脉模型中,BA也明显抑制4 T1肿瘤肺转移。这些结果表明,BA可能是一种潜在的抑制乳腺癌生长和转移的药物。
Breast cancer is the most common female cancer with considerable metastatic potential, explaining the need for new candidates that inhibit tumor metastasis. In our study, betulinic acid (BA), a kind of pentacyclic triterpenoid compound derived from birch trees, was evaluated for its anti-metastasis activity in vitro and in vivo. BA decreased the viability of three breast cancer cell lines and markedly impaired cell migration and invasion. In addition, BA could inhibit the activation of stat3 and FAK which resulted in a reduction of matrix metalloproteinases (MMPs), and increase of the MMPs inhibitor (TIMP-2) expression. Moreover, in our animal experiment, intraperitoneal administration of 10 mg/kg/day BA suppressed 4T1 tumor growth and blocked formation of pulmonary metastases without obvious side effects. Furthermore, histological and immunohistochemical analyses showed a decrease in MMP-9 positive cells, MMP-2 positive cells and Ki-67 positive cells and an increase in cleaved caspase-3 positive cells upon BA administration. Notably, BA reduced the number of myeloid-derived suppressor cells (MDSCs) in the lungs and tumors. Interestingly, in our caudal vein model, BA also obviously suppressed 4T1 tumor pulmonary metastases. These findings suggested that BA might be a potential agent for inhibiting the growth and metastasis of breast cancer.
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