A comparative immunohistochemical analysis of cortactin in orthokeratinized odontogenic cyst (OOC), sporadic odontogenic keratocyst (OKC), and syndromic OKC

ObjectivesTo evaluate and compare the immunohistochemical expression of cortactin in the epithelial lining of orthokeratinized odontogenic cyst (OOC), sporadic odontogenic keratocyst (OKC), and syndromic OKC.MethodsFormalin-fixed paraffin-embedded tissue blocks of histopathologically diagnosed cases of OOC, OKC, syndromic OKC, normal buccal mucosa (NBM), and oral squamous cell carcinoma (OSCC) were examined for immunohistochemical expression of cortactin. Clear brown cytoplasmic and membranous staining was considered positive.ResultsA statistically significant difference was observed between OOC and syndromic OKC (p < 0.001), as well as between sporadic OKC and syndromic OKC (p < 0.001). Although not statistically significant, the expression of cortactin was slightly higher in the basal layer of NBM (mean = 0.47), OOC (mean = 0.27), sporadic OKC (mean = 0.47) syndromic OKC (mean = 1.53), and OSCC (mean = 0.67) than in the parabasal layers of NBM (mean = 0.27), OOC (mean = 0.20), sporadic OKC (mean = 0.47), syndromic OKC (mean = 1.27), and OSCC (mean = 0.60).ConclusionThe expression of cortactin in the basal layer may suggest the formation of invadopodia in the basal layer where the invasion mechanism occurs. This finding is further supported by the higher localization of cortactin in areas of epithelial budding and daughter cysts in syndromic OKC, thereby reaffirming its possible association with recurrence.     

Cortactin表达与结肠直肠癌肿瘤出芽的相关研究

目的: 分析皮层蛋白Cortactin在肿瘤组织的表达水平和肿瘤出芽程度与结肠直肠癌特征的相关关系。方法: 检测97例结肠直肠癌病人癌组织Cortactin的表达水平和肿瘤出芽程度,分析其与病人临床特征的相关性。结果: Cortactin表达水平与结肠直肠癌病人T分期（P=0.017）和N分期（P<0.001）显著相关。结肠直肠癌Cortactin表达水平较高的病人年龄较小（P=0.043）。肿瘤出芽程度与病人T分期（P=0.031）、血浆CEA水平（P=0.038）以及结肠直肠癌高危因素（P=0.008）显著相关。Cortactin表达与结肠直肠癌肿瘤出芽程度显著相关（P=0.011）。结论: Cortactin表达水平与结肠直肠癌出芽显著相关,提示Cortactin可能促进结肠直肠癌细胞出芽、恶性进展和预后不良。     

选择性环氧合酶-2抑制剂通过Rho/ROCK通路对2型糖尿病合并非酒精性脂肪性肝炎大鼠肝脏保护作用机制的研究

目的:探讨选择性环氧合酶-2抑制剂塞来昔布是否通过抑制Rho/Rho相关蛋白激酶（ROCK）通路的表达对2型糖尿病（T2DM）合并非酒精性脂肪性肝炎（NASH）大鼠肝脏具有保护作用。方法:雄性SD大鼠40只,随机等分为T2DM合并非酒精性脂肪性肝炎（T2DM-NASH）组、T2DM-NASH+塞来昔布组、对照组、对照+...     

Association of cortactin, fascin-1 and epidermal growth factor receptor (EGFR) expression in ovarian carcinomas: correlation with clinicopathological parameters

Cortactin, fascin-1 and EGFR are recognized as important factors in tumor progression. We tested the hypothesis that cortactin, fascin-1 and EGFR expression correlates with clinicopathological parameters of the four most common ovarian surface epithelial carcinomas--serous cystadenocarcinoma, mucinous cystadenocarcinoma, endometrioid adenocarcinoma, and clear cell carcinoma. Immunohistochemical analysis of cortactin, fascin-1 and EGFR was performed using tissue microarrays of 172 specimens comprising 69 serous cystadenocarcinomas, 44 mucinous cystadenocarcinomas, 45 endometrioid adenocarcinomas and 14 clear cell carcinomas. All ovarian carcinomas showed significant expression of cortactin, fascin-1 and EGFR in staining intensity, tumor percentages and immunostaining scores. In addition, higher immunostaining scores of fascin-1 correlated with more advanced cancer stages (TNM), poorer histological differentiation and poorer survival rate of mucinous cystadenocarcinoma. Similarly, higher immunostaining scores of cortactin correlated with T stages and histological differentiation of serous cystadenocarcinoma. The immunostaining scores of EGFR did not correlate with TNM stages, tumor differentiation or prognosis in the four ovarian surface epithelial carcinomas. Our findings suggest that cortactin and fascin-1 may serve as good biomarkers in evaluating aggressiveness of ovarian serous and mucinous cystadenocarcinoma. And the pharmacological inhibitors of fascin-1 activity may slow down tumor progression and prolong survival time in patients with mucinous cystadenocarcinoma.     

Cortactin expression in nasal polyps of Aspirin-Exacerbated Respiratory Disease (AERD) patients

Purpose

The term aspirin-exacerbated respiratory disease (AERD) refers to a combination of asthma, chronic rhinosinusitis with nasal polyposis (CRSwNP), and acute respiratory tract reactions to nonsteroidal anti-inflammatory drugs. AERD has now been included among the CRSwNP endotypes, and is considered one of the most aggressive in terms of disease recurrence.Cortactin is a multi-domain protein with a part in several cellular mechanisms involving actin assembly and cytoskeleton arrangement. Cortactin seems to have a role in inflammatory responses and to be implicated in human airway secretion and contraction mechanisms.The novel aim of the present study was to examine cortactin expression in nasal polyps of a consecutive cohort of AERD patients and in nasal mucosa of a control group of patients.

Cortactin蛋白在结直肠癌中的表达变化及其临床意义

目的：探讨Cortactin（CTTN）蛋白在结直肠癌组织中的表达变化及其临床意义。方法：采用免疫组织化学法检测100例结直肠癌组织和癌旁正常组织中CTTN蛋白的表达情况,分析CTTN蛋白的表达变化与结直肠癌患者临床病理指标及预后的关系。结果：CTTN蛋白在结直肠癌组织中的阳性表达率为58%,显著高于癌旁正常组织的6%（P＜0.01）。CTTN蛋白（P＜0.05）阳性表达率在不同的T分期（浸润深度）间的差异有统计学意义,而与患者的性别、年龄、肿瘤原发部位、肿瘤大小和淋巴结转移均无显著相关（P＞0.05）。生存分析的结果显示,CTTN阳性患者的预后差于CTTN阴性患者（P=0.014）。结论：CTTN蛋白在结直肠癌中表达增加,并与结直肠肿瘤的浸润深度有关,可能作为结直肠癌预后判断的指标。     

实时荧光定量PCR检测人肝癌组织皮层肌动蛋白基因

目的建立实时荧光定量PCR检测皮层肌动蛋白基因表达水平的方法。方法提取人肝癌组织总RNA,RT—PCR扩增CTTN和GAPDH基因片段并分别构建两片段阳性表达载体。采用SYBR Green I实时荧光定量PCR绘制两基因拷贝数标准曲线,实测人肝癌标本并进行方法学评价。结果成功构建pMD18-T（＋）／CTTN和pMD18-T（＋）／GAPDH重组质粒。CTTN和GAPDH基因模板拷贝数分别在1．6×10^3-1．6×10^7和1．6×10^4-1．6×10^7之间时标准曲线有良好线性关系,R^2分别为0．996和0．985。由Ct值统计两基因组内变异系数分别为0．11％～2．25％和0．75％-3．63％;组间变异系数分别为0．83％～1．48％和0．47％～1．36％。组间无统计学差异（P〉0．05）。结论成功建立实时荧光定量PCR检测人肝癌组织CTTN基因的方法,为研究人肝癌组织CTTN基因表达水平奠定了方法学基础。     

癌基因CTTN表达Cortactin蛋白及其变异体磷酸化状态下与细胞蛋白Dynamin相互作用分析

目的:探讨Cortactin的氨基端序列在磷酸化介导的蛋白相互作用中的功能。方法:设计表达标签为GST的氨基端缺失的Cortactin突变体,纯化突变体蛋白,以及全长Cortactin蛋白,同时纯化His标签的细胞发动蛋白Dynamin,采用Src磷酸化Cortactin蛋白,并采用pull-down分析观察与Dynamin的相互作用。结果:成功表达和纯化Cortactin的1-80氨基酸(CortΔ80)缺失、1-349缺失的Cortactin突变体(CortΔ349),以及全长Cortactin(Cort WT)和Dynamin。Pull-down分析结果表明:与磷酸化的野生型Cortactin蛋白比较,氨基端缺失的Cortactin蛋白在磷酸化后与Dynamin的结合作用减弱。结论:实验提示Cortactin分子的氨基端是Arp2/3与actin结合的重要结构域其参与肌动蛋白聚合的过程,对于磷酸化信号的正常传导是不可或缺的部分。     

Expression of cortactin and survivin in renal cell carcinoma associated with tumor aggressiveness

Purpose  We tested the hypothesis that the expression of cortactin and survivin in renal cell carcinomas (RCCs) correlates with more advanced stages of the disease. Methods  Immunohistochemical analysis of cortactin and survivin expression (scored on a scale of 0–400) was performed in 124 renal cell carcinomas including clear cell renal cell carcinoma (CRCC), papillary RCC (PRCC), CRCC with sarcomatoid differentiation (SRCC), chromophobe RCC (ChRCC), and CRCC with granular cell differentiation (GRCC). Results  Higher cortactin scores in CRCC were significantly correlated with higher T (p = 0.021) and N stages (p = 0.036), and nuclear grade (p = 0.012). Higher cortactin immunostaining scores were associated with higher mortality (p = 0.035). In addition, the survivin scores were significantly higher in the more aggressive GRCC and SRCC than in CRCC, suggesting a significant role of survivin expression in transformation of tumor cells to a more malignant phenotype. Conclusions  Higher expression of cortactin and survivin significantly correlated with advanced clinicopathological stage. Our findings support the potential targeting of survivin and cortactin for the development of novel therapeutic strategies for renal cell carcinoma.