Cathepsin B: a potential prognostic marker for inflammatory breast cancer.

Cathepsin B: a potential prognostic marker for inflammatory breast cancer.
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组织蛋白酶 B:炎性乳腺癌的潜在预后标志物。

DOI:
10.1186/1479-5876-9-1
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发表时间:
2011-01-03
影响因子:
7.4
通讯作者:
Sloane BF
Sloane BF
中科院分区:
医学2区
文献类型:
--
作者:
Nouh MA;Mohamed MM;El-Shinawi M;Shaalan MA;Cavallo-Medved D;Khaled HM;Sloane BF

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炎症性乳腺癌(IBC)是乳腺癌中最具侵袭性的形式。在非IBC中,已知半胱氨酸蛋白酶组织蛋白酶B(CTSB)参与癌症进展和侵袭;然而,对其在IBC中的作用知之甚少。在这项研究中,我们招募了23名IBC和27名非IBC患者。用于分析的所有患者组织均来自未经治疗的患者。使用免疫组织化学和免疫印迹,我们评估了CTSB在IBC与非IBC患者组织中的表达水平。先前,我们发现CTSB定位于包括IBC在内的癌细胞系中的小窝膜微区,因此,我们还检测了小窝蛋白-1(cav-1)的表达,小窝蛋白-1是IBC与非IBC组织中小窝的结构蛋白。此外,我们还检测了两组患者中CTSB和cav-1的表达与阳性转移淋巴结数量之间的相关性。我们的研究结果表明,CTSB和cav-1在IBC中过表达相比,非IBC组织。CTSB的表达与IBC中阳性转移淋巴结数目呈正相关。CTSB可以启动蛋白水解途径,这对IBC入侵至关重要。因此,我们的数据表明,CTSB可能是一个潜在的预后标志物淋巴结转移的IBC。
Inflammatory breast cancer (IBC) is the most aggressive form of breast cancer. In non-IBC, the cysteine protease cathepsin B (CTSB) is known to be involved in cancer progression and invasion; however, very little is known about its role in IBC. In this study, we enrolled 23 IBC and 27 non-IBC patients. All patient tissues used for analysis were from untreated patients. Using immunohistochemistry and immunoblotting, we assessed the levels of expression of CTSB in IBC versus non-IBC patient tissues. Previously, we found that CTSB is localized to caveolar membrane microdomains in cancer cell lines including IBC, and therefore, we also examined the expression of caveolin-1 (cav-1), a structural protein of caveolae in IBC versus non-IBC tissues. In addition, we tested the correlation between the expression of CTSB and cav-1 and the number of positive metastatic lymph nodes in both patient groups. Our results revealed that CTSB and cav-1 were overexpressed in IBC as compared to non-IBC tissues. Moreover, there was a significant positive correlation between the expression of CTSB and the number of positive metastatic lymph nodes in IBC. CTSB may initiate proteolytic pathways crucial for IBC invasion. Thus, our data demonstrate that CTSB may be a potential prognostic marker for lymph node metastasis in IBC.
有关炎症性乳腺癌的最新信息。
DOI: 10.1186/bcr997
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