Nidogen 1 regulates proliferation and migration/invasion in murine claudin-low mammary tumor cells

Nidogen 1 (NID1) is a glycoprotein found in basement membranes involved in cross-linking collagen IV and laminin. The role of NID in breast cancer has only been evaluated in a small number of studies and the findings of these studies have been inconsistent. Our previous work revealed that highly tumorigenic murine mammary tumor cells express high levels of Nid1 while weakly tumorigenic mammary tumor cells express low levels of Nid1. To investigate Nid1, two stable knockdown lines were created, and Nid1 knockdown was confirmed at both the mRNA and protein level. Nid1 knockdown significantly reduced cell proliferation and migration/invasion and these reductions in proliferation and migration/invasion could be rescued by conditioned media containing NID1 protein. The reduced migration/invasion observed in the Nid1 knockdown cells was not associated with significant alterations in the epithelial gene Cdh1 or the mesenchymal genes Snai1, Snai2, Twist1, Twist2, Zeb1 and Zeb2. Therefore, suppression of Nid1 expression reduces proliferation and migration/invasion in claudin-low murine mammary tumor cells.     

Suppression of PRDX4 inhibits cell proliferation and invasion of ectopic endometrial stromal cells in endometriosis

Abstract

Oxidative stress (OS) has been proposed to play a role in the development of EMs. Peroxiredoxins are a family of antioxidant proteins that exhibit peroxidase activity in a thioredoxin-dependent manner, protecting cells against OS. The Western blotting results showed that the relative expression of PRDX4 was significantly increased in ectopic endometria compared with the normal endometria of EMs-free (p?<?.05). The H₂O₂ concentration was also significantly higher in the ectopic endometrium. PRDX4 siRNA was transfected into primary ectopic endometrial stromal cells (EESCs). The viability of the transfected EESCs was measured by CCK-8 assay, and the results showed significantly decreased cell viability. Furthermore, the apoptosis rate and ROS generation in flow cytometry assays were significantly increased after the knockdown of PRDX4 expression (p?<?.05). Scratch assays and transwell assays revealed that decreased expression of PRDX4 mediated by siRNA inhibited EESC migration and invasion. In conclusion, these findings indicate the potential role of PRDX4 in the development of EMs and PRDX4 as a possible therapeutic target for EMs treatment.     

吉西他滨联合西妥昔单抗对三阴乳腺癌细胞转移相关基质金属蛋白酶-9(MMP-9)活性的影响

目的：探讨吉西他滨联合西妥昔单抗对三阴乳腺癌细胞增殖、迁移、侵袭的影响，并对可能的机制进行初步的探究。方法：将实验分为西妥昔单抗组（150 μg · mL^-1）、吉西他滨联合用药组（西妥昔单抗150 μg · mL^-1，吉西他滨2.8 μg·mL^-1）。通过MTT、Transwell实验检测联合用药对MDA-MB-231细胞增殖、迁移、侵袭能力的影响，Western blotting实验检测合用药对MDA-MB-231细胞MMP-9、TIMP-1、p-IkB、NF-kB-p65表达水平的影响。结果：吉西他滨联合西妥昔单抗作用MDA-MB-231细胞后，其生长被不同程度的抑制，抑制率随吉西他滨浓度的增加而增高（P<0.05）；联合用药组MDA-MB-231细胞迁移、侵袭数目明显减少（P<0.05），同时MMP-9、p-IkB、NF-kB-p65的表达含量降低，TIMP-1表达含量增加。结论：吉西他滨联合西妥昔单抗对三阴乳腺癌细胞增殖、侵袭、迁移具有抑制作用，并明显抑制MMP-9的表达，其机制可能是通过抑制NF-kB通路实现。     

A Novel Nomogram to Identify Candidates for Extended Pelvic Lymph Node Dissection Among Patients with Clinically Localized Prostate Cancer Diagnosed with Magnetic Resonance Imaging-targeted and Systematic Biopsies

Background

Available models for predicting lymph node invasion (LNI) in prostate cancer (PCa) patients undergoing radical prostatectomy (RP) might not be applicable to men diagnosed via magnetic resonance imaging (MRI)-targeted biopsies.

Resection of hepatocellular carcinoma with tumor thrombus in the major vasculature. A European case-control series

Tumor thrombus in major vasculature is a frequent finding with a poor long-term prognosis in patients with hepatocellular carcinoma (HCC). The utility of surgical resection is still controversial. This study compared morbidity and survival after resection for HCC with and without tumor thrombus. Data of 108 patients who underwent major hepatic resection for HCC were prospectively recorded. Patients were divided into two groups. The venous thrombectomy (VT) group included 26 patients who had HCC with tumor thrombus in the portal or hepatic veins. The matched control group included 82 patients who had HCC without tumor thrombus. Surgical technique, early outcome, and late survival were analyzed in each group. Multivariate analysis was performed to assess the prognostic value of this feature. Surgical technique was comparable in the VT and control group with regard to extent of hepatectomy, procedure duration, and transfusion requirements. Early postoperative outcome was also comparable. Actuarial survival at 1, 3, and 5 years was 38%, 20%, and 13%, respectively, in the VT group (median: 9 months) versus 74%, 56%, and 33%, respectively, in the control group (median: 41 months). In the subgroup of patients with tumor thrombus limited to the portal vein, actuarial survival at 1, 3, and 5 years was 50%, 26%, and 17%, respectively, (median: 12 months) and two patients lived longer than 5 years. Multivariate analysis showed that incomplete resection, alphafetoprotein level greater than 100 N, more than two tumor nodules, and tumor thrombus in major vasculature were independent factors of poor prognosis. Survival after resection for HCC with tumor thrombus in the major vasculature is poorer than after resection for HCC without tumor thrombus. However, an aggressive surgical strategy can provide significant survival with comparable morbidity in selected cases, that is, tumor thrombus located in the portal vein only and expected complete resection of the lesions.     

nm23-H1基因转染对人胆管癌细胞系QBC939体外浸润能力的影响

目的：探讨nm23-H1基因转染对人胆管癌细胞系QBC939体外浸润能力的影响。方法：将含有全长nm23-H1 cDNA的真核表达载体通过脂腩体法转染人胆管癌细胞系。结果：转染成功的QBC939细胞，其nm23-Hl基因的mRNA、蛋白表达明显增加，转染nm23-H1基因的胆管癌细胞体外浸润能力下降，穿越matrigel的细胞数明显低于亲本QBC939细胞，代表浸润能力的IV型胶原酶（MMP-9）分泌量下降。结论：nm23-Hl基因可以抑制胆管癌细胞的体外浸润能力。     

MMP-9和TIMP-1表达失衡与乳腺癌浸润、转移的相关性

目的 研究乳腺癌组织中基质金属蛋白酶（MMP－9）和金属蛋白酶组织抑制因子（TIMP－1）的表达变化与乳腺癌生物学行为及淋巴结转移的关系。方法 应用SP免疫组织化学方法检测85例乳腺癌组织MMP－9，TIMP－1及细胞增殖核抗原ki-67的表达情况。结果 MMP-9阳性染色率90．59％，MMP－9阳性表达与肿瘤浸润，淋巴结转移，ki-67指数及TNM分期呈正相关（Pearson列联系数分别为P=0.03,P=0.02,P=0.004和P＝0．0000，P＜0．05，0．01。TIMP－1阳性染色率为78．82％，TIMP－1阳性表达与肿瘤浸润，淋巴结转移及TNM分期浸润，转移及ki-67指数显著相关（P＜0．05，P＜0．01，P＜0．001）。结论 MMP－9和TIMP－1表达失衡与乳腺癌浸润及淋巴结转移密切相关。     

人透明软骨抗OS-732细胞系浸润的研究——细胞培养及透射电镜观察

本文研究成骨肉瘤OS-732细胞系浸润软骨的机理,指出经盐酸胍处理后的软骨可被瘤细胞所浸润,这些浸润细胞在电镜下见其有生长、代谢旺盛的特点,提示正常软骨内含有抑制肿瘤细胞浸润的因子存在。     

维生素E琥珀酸酯对人肝癌细胞凋亡和侵袭性

目的研究维生素E琥珀酸酯（VES）诱导体外培养人肝癌细胞凋亡以及对肝癌细胞侵袭性的抑制作用。方法自2004年至2005年7月,体外培养SMMC7721人肝癌细胞系,在培养液中加入VES共育,用等量的生理盐水作为对照组。培养6、24、48h后采用流式细胞仪检测肝癌细胞的凋亡,小孔趋化试验检测肝癌细胞的体外侵袭性变化。结果在加入VES后肝癌细胞的凋亡率与对照组相比明显增加。在48h加入VES的实验组与对照组相比,肝癌细胞的小孔趋化试验明显受到抑制。结论VES具有体外诱导人肝癌细胞系凋亡以及抑制肝癌细胞体外侵袭性的作用,是潜在的抗肿瘤因子。