Maspin belongs to the serine protease inhibitor （serpin） family and has been proven to be a suppressor of tumor growth and metastasis in many types of tumors. The purpose of this study was to investigate the express...Maspin belongs to the serine protease inhibitor （serpin） family and has been proven to be a suppressor of tumor growth and metastasis in many types of tumors. The purpose of this study was to investigate the expression of maspin in non-small cell lung cancer （NSCLC） and its relationship to vasculogenic mimicry （VM）. A total of 160 specimens of NSCLC were involved in this study and 20 specimens of normal lung tissue served as controls. VM, microvessel density （MVD） and the expression of maspin were detected by using immunohistochemical staining. The results showed that the positive rates of maspin and VM in the NSCLC group were 48.1% （77/160） and 36.9% （59/160）, respectively, which were significantly different from those in the control group with the positive rates of maspin and VM being 100% and 0% respectively （P〈0.05）. VM, MVD and the expression level of maspin were significantly related to tumor differentiation, lymph node metastasis, clinical stages and postoperative survival time （all P〈0.05）. The maspin expression in patients with squamous cell carcinoma was significantly higher than that in those with adenocarcinoma （P〈0.05）. The maspin expression was negatively correlated with VM and MVD, and there was a positive correlation between VM and MVD. Maspin-negative expression, VM and high MVD score were negatively related to the 5-year-survival rate. PTNM stages, VM, MVD and maspin expression were independent prognostic factors for NSCLC （P〈0.05）. It was suggested that the loss of expression of maspin may participate in the invasion and metastasis of NSCLC and it has a positive relationship to VM in NSCLC. Combined detection of maspin, VM and MVD may help predict the progression and prognosis of NSCLC.展开更多
Objective: To observe the antitumor effect and mechanism of recombinant human endostatin(Endostar) injection in tumor combined with intraperitoneal injection of cisplatin on subcutaneous transplanted Lewis lung cancer...Objective: To observe the antitumor effect and mechanism of recombinant human endostatin(Endostar) injection in tumor combined with intraperitoneal injection of cisplatin on subcutaneous transplanted Lewis lung cancer in rats. Methods: A total of 30 C57 rats were selected, and the monoplast suspension of Lewis lung cancer was injected into the left axilla to prepare the subcutaneous transplanted tumor models in the axilla of right upper limb. The models were randomly divided into Groups A, B, and C. Medication was conducted when the tumor grew to 400 mm3. Group A was the control group without any interventional treatment. Group B was injected with Endostar 5 mg.kg-1.d for 10 d. Group C was given the injection of Endostar 5 mg.kg-1.d combined with intraperitoneal injection of cisplatin 5 mg.kg-1.d for 10 d. All the rats in three groups were executed the day after the 10-d medication and the tumor was taken off for measurement of volume and mass changes and calculation of antitumor rate, after which the vascular endothelial growth factor(VEGF) concentration in rats' plasma was determined by ELISA. The tumor tissues were cut for the preparation of conventional biopsies. After hematoxylin-eosin staining, the pathologic histology was examined to observe the structures of tumor tissues, VEGF score and microvessel density(MVD) in each group. Results: The volume and mass of tumor in Groups B and C were significantly lower than Group A(P < 0.05) while the tumor volume and mass in Group C were significantly lower than Group B(P < 0.05). The antitumor rate in Group C was significantly higher than Group B(P < 0.05), but the tumor VEGF score, MVD and plasma VEGF level in Group C were significantly lower than Groups A and B(P < 0.05). In Group B, the tumor VEGF score, MVD and plasma VEGF level were significantly lower than Group A(P < 0.05). The microscopic image of Group C showed that its number of active tumor cells and the blood capillary around tumor was significantly smaller than that of Groups A and B, and meanwhile atrophy and liquefactive necrosis were seen in local tumor. Conclusions: Endostar injection combined with intraperitoneal injection of cisplatin is effective in reducing tumor VEGF score and MVD of transplanted tumor tissues in rats with Lewis lung cancer to obstruct the nutrient supply of tumor cells and kill tumor cells, so that the inhibition of tumor cell proliferation and metastasis can be achieved with a remarkable effect.展开更多
目的观察丙泊酚对脂多糖(LPS)刺激的大鼠肺微血管内皮细胞水通道蛋白-1(AQP-l)表达的影响,阐明其减轻急性肺损伤的可能机制。方法大鼠肺微血管内皮细胞体外培养后随机分为7组,每组5份:①C组(对照组);②LPS0.1组(脂多糖终浓度为0.1μg/m...目的观察丙泊酚对脂多糖(LPS)刺激的大鼠肺微血管内皮细胞水通道蛋白-1(AQP-l)表达的影响,阐明其减轻急性肺损伤的可能机制。方法大鼠肺微血管内皮细胞体外培养后随机分为7组,每组5份:①C组(对照组);②LPS0.1组(脂多糖终浓度为0.1μg/mL);③LPS1组(脂多糖终浓度为1μg/mL);④LPS10组(脂多糖终浓度为10μg/mL);⑤P4(丙泊酚终浓度为4μg/mL)+LPS10组;⑥P40(丙泊酚终浓度为40μg/mL)+LPS10组;⑦I40(脂质溶剂的体积和浓度同P40)+LPS10组。按上述分组,在相应组中分别加入不同浓度丙泊酚、等量脂肪乳剂或培养液,于37℃5%CO2培养箱中孵育30 m in,再在相应组中加入LPS,置于培养箱继续孵育6 h。收集细胞并测定下列指标:AQP-1(免疫细胞化学和W estern b lotting)和蛋白质渗透压反射系数(σ)。结果LPS可浓度依赖性减少内皮细胞AQP-l的表达和(值P<0.01)。与LPS10组比较,P4+LPS10及P40+LPS10两组能显著增加内皮细胞AQP-1的表达和(值P<0.01),而I40+LPS10组变化不明显(P>0.05)。结论丙泊酚可通过调节AQP-l的表达和σ变化,从而减轻ALI/ARDS肺水肿的形成。展开更多
文摘Maspin belongs to the serine protease inhibitor （serpin） family and has been proven to be a suppressor of tumor growth and metastasis in many types of tumors. The purpose of this study was to investigate the expression of maspin in non-small cell lung cancer （NSCLC） and its relationship to vasculogenic mimicry （VM）. A total of 160 specimens of NSCLC were involved in this study and 20 specimens of normal lung tissue served as controls. VM, microvessel density （MVD） and the expression of maspin were detected by using immunohistochemical staining. The results showed that the positive rates of maspin and VM in the NSCLC group were 48.1% （77/160） and 36.9% （59/160）, respectively, which were significantly different from those in the control group with the positive rates of maspin and VM being 100% and 0% respectively （P〈0.05）. VM, MVD and the expression level of maspin were significantly related to tumor differentiation, lymph node metastasis, clinical stages and postoperative survival time （all P〈0.05）. The maspin expression in patients with squamous cell carcinoma was significantly higher than that in those with adenocarcinoma （P〈0.05）. The maspin expression was negatively correlated with VM and MVD, and there was a positive correlation between VM and MVD. Maspin-negative expression, VM and high MVD score were negatively related to the 5-year-survival rate. PTNM stages, VM, MVD and maspin expression were independent prognostic factors for NSCLC （P〈0.05）. It was suggested that the loss of expression of maspin may participate in the invasion and metastasis of NSCLC and it has a positive relationship to VM in NSCLC. Combined detection of maspin, VM and MVD may help predict the progression and prognosis of NSCLC.
基金supported by Liaoning BaiQianWan Talents Program(No.2012921017)
文摘Objective: To observe the antitumor effect and mechanism of recombinant human endostatin(Endostar) injection in tumor combined with intraperitoneal injection of cisplatin on subcutaneous transplanted Lewis lung cancer in rats. Methods: A total of 30 C57 rats were selected, and the monoplast suspension of Lewis lung cancer was injected into the left axilla to prepare the subcutaneous transplanted tumor models in the axilla of right upper limb. The models were randomly divided into Groups A, B, and C. Medication was conducted when the tumor grew to 400 mm3. Group A was the control group without any interventional treatment. Group B was injected with Endostar 5 mg.kg-1.d for 10 d. Group C was given the injection of Endostar 5 mg.kg-1.d combined with intraperitoneal injection of cisplatin 5 mg.kg-1.d for 10 d. All the rats in three groups were executed the day after the 10-d medication and the tumor was taken off for measurement of volume and mass changes and calculation of antitumor rate, after which the vascular endothelial growth factor(VEGF) concentration in rats' plasma was determined by ELISA. The tumor tissues were cut for the preparation of conventional biopsies. After hematoxylin-eosin staining, the pathologic histology was examined to observe the structures of tumor tissues, VEGF score and microvessel density(MVD) in each group. Results: The volume and mass of tumor in Groups B and C were significantly lower than Group A(P < 0.05) while the tumor volume and mass in Group C were significantly lower than Group B(P < 0.05). The antitumor rate in Group C was significantly higher than Group B(P < 0.05), but the tumor VEGF score, MVD and plasma VEGF level in Group C were significantly lower than Groups A and B(P < 0.05). In Group B, the tumor VEGF score, MVD and plasma VEGF level were significantly lower than Group A(P < 0.05). The microscopic image of Group C showed that its number of active tumor cells and the blood capillary around tumor was significantly smaller than that of Groups A and B, and meanwhile atrophy and liquefactive necrosis were seen in local tumor. Conclusions: Endostar injection combined with intraperitoneal injection of cisplatin is effective in reducing tumor VEGF score and MVD of transplanted tumor tissues in rats with Lewis lung cancer to obstruct the nutrient supply of tumor cells and kill tumor cells, so that the inhibition of tumor cell proliferation and metastasis can be achieved with a remarkable effect.
文摘目的观察丙泊酚对脂多糖(LPS)刺激的大鼠肺微血管内皮细胞水通道蛋白-1(AQP-l)表达的影响,阐明其减轻急性肺损伤的可能机制。方法大鼠肺微血管内皮细胞体外培养后随机分为7组,每组5份:①C组(对照组);②LPS0.1组(脂多糖终浓度为0.1μg/mL);③LPS1组(脂多糖终浓度为1μg/mL);④LPS10组(脂多糖终浓度为10μg/mL);⑤P4(丙泊酚终浓度为4μg/mL)+LPS10组;⑥P40(丙泊酚终浓度为40μg/mL)+LPS10组;⑦I40(脂质溶剂的体积和浓度同P40)+LPS10组。按上述分组,在相应组中分别加入不同浓度丙泊酚、等量脂肪乳剂或培养液,于37℃5%CO2培养箱中孵育30 m in,再在相应组中加入LPS,置于培养箱继续孵育6 h。收集细胞并测定下列指标:AQP-1(免疫细胞化学和W estern b lotting)和蛋白质渗透压反射系数(σ)。结果LPS可浓度依赖性减少内皮细胞AQP-l的表达和(值P<0.01)。与LPS10组比较,P4+LPS10及P40+LPS10两组能显著增加内皮细胞AQP-1的表达和(值P<0.01),而I40+LPS10组变化不明显(P>0.05)。结论丙泊酚可通过调节AQP-l的表达和σ变化,从而减轻ALI/ARDS肺水肿的形成。
