神经生长因子促进MIA PaCa-2人胰腺癌细胞的增殖

目的：观察神经生长因子-β(nerve growth factorbeta, NGFβ)对人胰腺癌MIA PaCa-2细胞增殖及细胞周期的影响。方法:体外培养MIA PaCa-2细胞,单独或联合给予不同浓度的NGF-β和K252a (NGF-β受体TrKA的抑制剂),应用克隆平板实验、MTT法和流式细胞术检测NGF-β和K252a对MIA PaCa-2细胞克隆形成率、增殖及细胞周期的影响。结果：NGF-β显著促进MIA PaCa-2细胞的克隆形成（P<0.05）,NGF-β使MIA PaCa2细胞增殖能力明显增强（P<0.01）,K252a抑制MIA PaCa-2细胞增殖（P<0.05）,NGF-β与K252a联合作用对MIA PaCa-2细胞的增殖能力无明显影响。NGF-β作用使MIA PaCa2细胞周期阻滞于S期,K252a作用使其周期阻滞于G0/G1期,两者联合作用使MIA PaCa-2细胞周期阻滞于S期。结论：NGF-β具有促进胰腺癌MIA PaCa-2细胞增殖的作用。     

Artemin及受体GFRα3对MIA PaCa-2人胰腺癌细胞浸润和转移能力的影响

目的 探讨Artemin及其受体GFRα3对MIA PaCa-2人胰腺癌细胞浸润转移能力的影响.方法 以MIA PaCa-2人胰腺癌细胞为研究对象,采用Transwell Chamber分析不同浓度的Artemin及受体GFRα3对胰腺癌细胞浸润转移能力的影响,MIA PaCa-2胰腺癌细胞经Artemin及受体GFRα3刺激后,采用RT-PCR及Western blot方法定量分析MIA PaCa-2细胞中基质金属蛋白酶-2（MMP-2）、上皮钙粘附素（E-cadherin）表达水平的变化.结果 随着Artemin及受体GFRα3作用浓度的增加,MIA PaCa-2胰腺癌细胞浸润转移能力明显增强,均明显高于对照组[150 ng/ml浓度：Artemin组：107.4±11.4;GFRα3组：94.4±9.3;对照组：34.6±7.3,P〈0.01].150 ng/ml为二者的最佳作用浓度.经150 ng/ml Artemin、GFRα3分别作用后,MIA PaCa-2细胞合成MMP-2明显增加[Artemin组：（2.17±0.05）×108;GFRα3组：（2.02±0.03）×108;对照组：（1.02±0.02）×108,t=6.35,7.32],而E-cadherin明显降低[Artemin组：（0.65±0.04）×108;GFRα3组：（0.74±0.01）×108;对照组：（1.36±0.03）×108,t=4.27,5.61],与对照组比较差异均有统计学意义（P〈0.01）.结论 Artemin及其受体GFRα3可促进胰腺癌细胞的浸润和转移能力,可能与浸润转移相关分子MMP-2表达上调、E-cadherin表达下调有关.     

Effects of Artemin and its receptor GFRα - 3 on the invasion and metastasis of human pancreatic cancer cell line MIA PaCa-2

Objective To investigate the effects of artemin and its receptor GFRα - 3 on the invasion and metastasis of pancreatic cancer cells. Methods Human pancreatic cancer cell line MIA PaCa -2 was used in this study. Transwell cell culture chamber assay in vitro was used to detect the ability of invasion and metastasis of MIA PaCa -2 cells. The influence of artemin and GFRα -3 on the protein expression of MMP-2 and E-cadherin was investigated by Western blot and quantitative real time polymerase chain reaction-analyses (Q-RT-PCR). Results As the increase of artemin and GFRα -3, the invasion and metastasis of MIA PaCa- 2 was markedly increased [ 150 ng / ml concentration: Artemin group: 107.4 ± 11.4;GFRα3 group:94. 4 ± 9. 3 ;control group:34. 6 ± 7. 3, P < 0. 01 ]. With 150 ng / ml artemin and GFR-3,the synthesis of MMP-2 in MIA PaCa 2 cells was significantly increased than that in control group[ Artemin grou: (2. 17 ± 0. 05 ) × 108; GFRα3 group: (2. 02 ± 0. 03 ) × 108; control group: ( 1.02 ± 0. 02 ) × 108, t =6. 35,7. 32 ], while E-cadherin significantly decreased [ Artemin group: ( 0. 65 ± 0. 04 ) × 108; GFRα3 group: (0. 74 ± 0. 01 ) × 108; control group: ( 1. 36 ± 0. 03 ) × 108, t = 4. 27,5.61 ], the difference was statistically significant ( P <0. 01 ). Conclusions Artemin and its receptor GFRα3 could promote pancreatic cancer cell invasion and metastasis. This effect may be related to the up-regulated expression of MMP-2 and down regulated expression of E-cadherin.     

1例罕见的猛性龋临床原因分析

猛性龋在危重患者、放疗和化疗的患者中较常见 ,正常人罕见。笔者遇 1例 ,报道如下 :1　临床资料患者女 ,2 3岁 ,在校大学生。因全口牙龋坏影响进食和美观 ,于 2 0 0 0 - 11- 2 1就诊。两年前上颌前牙发黑逐渐龋坏致牙冠缺失 ,残留牙根未行处理而做 11、12、2 1、2 2活动义齿修复。后再诊治时病情加重 ,其余牙 2年内迅速发生龋坏。检查 :11、12、13、14、15、17、2 1、2 2、2 3、2 4、2 6、35、36、43、45、46、47残根 ,16、2 5、2 7、34、37、44残冠 ,死髓牙 ,有部分银汞合金充填物。 31、32、33、41、42近远中邻面均有面积大小不等的龋坏 …     

骨桥蛋白和基质金属蛋白酶-9在胰腺癌中的表达及其临床意义

Objective To investigate the expression and the role of osteopontin(OPN)and matrix metalloproteinase-9(MMP-9)in the invasion and metastasis of pancreatic carcinoma.Methods Human pancreatic cancer cell line MIA PaCa-2 was cultured in vitro.The location of OPN protein in pancreatic tumor cell line was detected by immunofluorescence staining.100 cases of pancreatic cancer and 40 cases of adjacent normal pancreatic tissues were used to analysis.The expressions of OPN and MMP-9 were investigated by immunohistochemistry assay.Results OPN expressed in the cell membrane and cytoplasm,OPN and MMP-9 in pancreatic cancer tissues positive rates were 73.0%(73/100)and 68.0%(68/100),which were higher than that in adjacent normal pancreatic tissues(all P ＜ 0.05).OPN and MMP-9 expression were associated with pancreatic tumor grade,lymph node metastasis and perineural invasion of pancreatic cancer(P ＜ 0.05).OPN and MMP-9 in pancreatic cancer tissues were positively correlated(r,=0.39,P ＜ 0.01).Conclusions OPN and M MP-2 might play an important role in the development of invasion and metastasis of pancreatic carcinoma.OPN and MMP-2 might play synergetic roles in the progression of pancreatic carcinoma.     

神经生长因子及其受体在人胰腺导管癌组织中的表达

Objective To investigate nerve growth factor (β-NGF) and its receptors expression in human pancreatic ductal adenocarcinoma. Methods Expression and distribution of β-NGF, tyrosine kinase A (TrKA) and P75NGFR were detected in operation tissue specimens of pancreatic ductal adenocarcinoma with immunohistochemistry and real-time PCR. Relations of β-NGF and its receptors with clinicalpathological characters, especially nerve invasion were analyzed. Results β-NGF and TrKA expression are higher in pancreatic adenocarcinoma than normal pancreas, and the differences are significant (P < 0. 01). Β-NGF and TrKA expression are associated with the differentiation grades(DG), lymphatic node metastasis, nerve invasion and surgical pathological stages. Poorer of DG and later stages, more expression of β-NGF and TrKA. Β-NGF and TrKA expression have positive correlations. Β-NGF, TrKA and P75NGFR mRNA expression have significantly increased 3.84,4. 23 and 2. 41 times than normal tissues by real-time PCR, respectively. Conclusions β-NGF and TrKA might play potential rules in carcinogenesis for pancreatic cancer,have affinity with clinicopathological characters of pancreatic cancer. Β-NGF and TrKA may have mutual effect in signal transduction leading to perineural invasion of pancreatic carcinoma.     

Neuropilin-1在胰腺导管癌及MIA PaCa-Ⅱ细胞系中的表达及意义

目的探讨Neuropilin-1在胰腺导管癌组织及MIAPaCa-Ⅱ胰腺癌细胞系中的袁达及意义。方法运用免疫组化和RT—PCR法分别检测正常胰腺组织、癌旁组织、胰腺癌组织及MIAPaCa-Ⅱ细胞系中Neuropilin-1蛋白及mRNA表达水平。结果蛋白水平可见正常胰腺组织无表达,癌旁组织轻度表达,而胰腺癌组织及MIAPaCa-Ⅱ胰腺癌细胞中高水平表达。神经组织也可表达Neuropilin-1。mRNA水平见正常胰腺组织微量表达,癌旁组织中度表达,而胰腺癌组织及MIAPaCa-Ⅱ胰腺癌细胞中高水平表达。结论Neuropilin-1可能参与了胰腺癌的发生发展,在胰腺癌神经转移中可能起着重要作用。     

前列腺干细胞抗原在胰腺癌神经浸润转移中作用的研究

目的 探讨前列腺干细胞抗原(PSCA)在人胰腺癌神经浸润中的作用.方法 80例胰腺癌手术标本切片HE染色,观察记数小血管、小淋巴管、神经纤维浸润数.用鼠抗人PSCA单抗行免疫组化二步法染色,观察肿瘤细胞的阳性情况.结果 肿瘤细胞神经浸润阳性与小血管、小淋巴管的浸润呈正相关(r=0.978,r=0.548,P<0.01或P<0.05);肿瘤细胞PSCA表达阳性(53例)与神经浸润阳性(66例)呈正相关(r=0.746,P<0.01);肿瘤的恶性程度与PSCA表达呈正相关;PSCA表达与小血管、小淋巴管浸润无关.结论 PSCA可能是胰腺癌的特征性分子之一.它可引导胰腺癌细胞向神经纤维趋化和黏附,即起"导航"和"停泊"作用.     

神经生长因子及其受体在人胰腺导管癌组织中的表达

Objective To investigate nerve growth factor (β-NGF) and its receptors expression in human pancreatic ductal adenocarcinoma. Methods Expression and distribution of β-NGF, tyrosine kinase A (TrKA) and P75NGFR were detected in operation tissue specimens of pancreatic ductal adenocarcinoma with immunohistochemistry and real-time PCR. Relations of β-NGF and its receptors with clinicalpathological characters, especially nerve invasion were analyzed. Results β-NGF and TrKA expression are higher in pancreatic adenocarcinoma than normal pancreas, and the differences are significant (P < 0. 01). Β-NGF and TrKA expression are associated with the differentiation grades(DG), lymphatic node metastasis, nerve invasion and surgical pathological stages. Poorer of DG and later stages, more expression of β-NGF and TrKA. Β-NGF and TrKA expression have positive correlations. Β-NGF, TrKA and P75NGFR mRNA expression have significantly increased 3.84,4. 23 and 2. 41 times than normal tissues by real-time PCR, respectively. Conclusions β-NGF and TrKA might play potential rules in carcinogenesis for pancreatic cancer,have affinity with clinicopathological characters of pancreatic cancer. Β-NGF and TrKA may have mutual effect in signal transduction leading to perineural invasion of pancreatic carcinoma.     

神经生长因子及其受体在人胰腺导管癌组织中的表达

Objective To investigate nerve growth factor (β-NGF) and its receptors expression in human pancreatic ductal adenocarcinoma. Methods Expression and distribution of β-NGF, tyrosine kinase A (TrKA) and P75NGFR were detected in operation tissue specimens of pancreatic ductal adenocarcinoma with immunohistochemistry and real-time PCR. Relations of β-NGF and its receptors with clinicalpathological characters, especially nerve invasion were analyzed. Results β-NGF and TrKA expression are higher in pancreatic adenocarcinoma than normal pancreas, and the differences are significant (P < 0. 01). Β-NGF and TrKA expression are associated with the differentiation grades(DG), lymphatic node metastasis, nerve invasion and surgical pathological stages. Poorer of DG and later stages, more expression of β-NGF and TrKA. Β-NGF and TrKA expression have positive correlations. Β-NGF, TrKA and P75NGFR mRNA expression have significantly increased 3.84,4. 23 and 2. 41 times than normal tissues by real-time PCR, respectively. Conclusions β-NGF and TrKA might play potential rules in carcinogenesis for pancreatic cancer,have affinity with clinicopathological characters of pancreatic cancer. Β-NGF and TrKA may have mutual effect in signal transduction leading to perineural invasion of pancreatic carcinoma.