AIM： To investigate the expression of cyclooxygenase-2 （COX-2） and epithelial growth factor receptor （EGFR） throughout the progression of Barrett＇s esophagus （BE）. METHODS： COX-2 and EGFR protein expressions ...AIM： To investigate the expression of cyclooxygenase-2 （COX-2） and epithelial growth factor receptor （EGFR） throughout the progression of Barrett＇s esophagus （BE）. METHODS： COX-2 and EGFR protein expressions were detected by using immunohistochemical method. A detailed cytomorphological changes were determined. Areas of COX-2 and EGFR expression were quantified by using computer Imaging System. RESULTS： The expressions of both COX-2 and EGFR increased along with the progression from BE to esophagus adenocarcinoma （EAC）. A positive correlation was found between COX-2 expression and EGFR expression. CONCLUSION： COX-2 and EGFR may be cooperative in the stepwise progression from BE to EAC, thereby leading to carcinogenesis.展开更多
Objective:To investigate the genetic correlations between epithelial growth factor receptor(EGFR)mutation and FHIT methylation in patients diagnosed with lung adenocarcinoma(AC)and pulmonary tuberculosis(TB).Methods:T...Objective:To investigate the genetic correlations between epithelial growth factor receptor(EGFR)mutation and FHIT methylation in patients diagnosed with lung adenocarcinoma(AC)and pulmonary tuberculosis(TB).Methods:The presence of EGFR mutations and the methylation status of the FHIT gene in patients presenting with AC and TB were analyzed.The correlation between TB status and the observed genetic and epigenetic variations was also examined.Results:Among the 90 patients included in the study,38 exhibited EGFR mutations(14 among those with TB and 24 among those without TB),while 29 exhibited FHIT myelination(19 among those with TB and 10 among those without TB).Furthermore,the protein expression levels of EGFR and FHIT were significantly higher in patients diagnosed solely with AC compared to those presenting with both AC and TB.A robust inverse correlation was identified between TB status and the frequency of EGFR mutation(P<0.001).Moreover,significant associations were observed between TB status and FHIT methylation(P<0.01).Conclusion:The findings suggest a correlation between TB and the prevalence of EGFR mutation and FHIT methylation in the pathogenesis of AC.展开更多
目的:建立一种基于荧光偏振技术快速、特异的检测体系,并将该体系用于检测肺癌标本中EGFR基因19、21外显子的突变丰度,以便更加全面、准确地预测靶向药物疗效以及指导临床靶向药物选择。方法:应用Primer premier 5.0软件在EGFR基因19、2...目的:建立一种基于荧光偏振技术快速、特异的检测体系,并将该体系用于检测肺癌标本中EGFR基因19、21外显子的突变丰度,以便更加全面、准确地预测靶向药物疗效以及指导临床靶向药物选择。方法:应用Primer premier 5.0软件在EGFR基因19、21号外显子突变区域上下游处设计19、21外显子各自的通用PCR引物,并设计覆盖各自突变区域的两对荧光标记探针(突变型和野生型)。以包含野生型(19、21)和突变型(19、21)的质粒分别为4种阳性标准品,空载体为阴性标准品,分别作为模板进行PCR扩增反应,将扩增结果应用荧光偏振仪进行检测,以建立突变丰度测量体系。最后,对51例肺腺癌标本进行检测,并计算出各自的突变丰度。结果:荧光偏振检测EGFR基因19、21外显子突变结果与直接测序法结果无统计学差异,且最低检测浓度为40拷贝/μl,最低检测含量可达10%。本法可提供更全面的瘤内基因变异丰度分析,有利于指导临床用药。结论:荧光偏振检测EGFR基因19、21外显子突变结果不仅灵敏度与特异性高,还能提供全面的瘤内异质性分析指标,可为临床肺癌个体化治疗效果提供预测依据。展开更多
基金Supported by the University of Louisville Hospital the Society for Surgery of the Alimentary Tract Career Development Award
文摘AIM： To investigate the expression of cyclooxygenase-2 （COX-2） and epithelial growth factor receptor （EGFR） throughout the progression of Barrett＇s esophagus （BE）. METHODS： COX-2 and EGFR protein expressions were detected by using immunohistochemical method. A detailed cytomorphological changes were determined. Areas of COX-2 and EGFR expression were quantified by using computer Imaging System. RESULTS： The expressions of both COX-2 and EGFR increased along with the progression from BE to esophagus adenocarcinoma （EAC）. A positive correlation was found between COX-2 expression and EGFR expression. CONCLUSION： COX-2 and EGFR may be cooperative in the stepwise progression from BE to EAC, thereby leading to carcinogenesis.
文摘Objective:To investigate the genetic correlations between epithelial growth factor receptor(EGFR)mutation and FHIT methylation in patients diagnosed with lung adenocarcinoma(AC)and pulmonary tuberculosis(TB).Methods:The presence of EGFR mutations and the methylation status of the FHIT gene in patients presenting with AC and TB were analyzed.The correlation between TB status and the observed genetic and epigenetic variations was also examined.Results:Among the 90 patients included in the study,38 exhibited EGFR mutations(14 among those with TB and 24 among those without TB),while 29 exhibited FHIT myelination(19 among those with TB and 10 among those without TB).Furthermore,the protein expression levels of EGFR and FHIT were significantly higher in patients diagnosed solely with AC compared to those presenting with both AC and TB.A robust inverse correlation was identified between TB status and the frequency of EGFR mutation(P<0.001).Moreover,significant associations were observed between TB status and FHIT methylation(P<0.01).Conclusion:The findings suggest a correlation between TB and the prevalence of EGFR mutation and FHIT methylation in the pathogenesis of AC.
文摘目的:建立一种基于荧光偏振技术快速、特异的检测体系,并将该体系用于检测肺癌标本中EGFR基因19、21外显子的突变丰度,以便更加全面、准确地预测靶向药物疗效以及指导临床靶向药物选择。方法:应用Primer premier 5.0软件在EGFR基因19、21号外显子突变区域上下游处设计19、21外显子各自的通用PCR引物,并设计覆盖各自突变区域的两对荧光标记探针(突变型和野生型)。以包含野生型(19、21)和突变型(19、21)的质粒分别为4种阳性标准品,空载体为阴性标准品,分别作为模板进行PCR扩增反应,将扩增结果应用荧光偏振仪进行检测,以建立突变丰度测量体系。最后,对51例肺腺癌标本进行检测,并计算出各自的突变丰度。结果:荧光偏振检测EGFR基因19、21外显子突变结果与直接测序法结果无统计学差异,且最低检测浓度为40拷贝/μl,最低检测含量可达10%。本法可提供更全面的瘤内基因变异丰度分析,有利于指导临床用药。结论:荧光偏振检测EGFR基因19、21外显子突变结果不仅灵敏度与特异性高,还能提供全面的瘤内异质性分析指标,可为临床肺癌个体化治疗效果提供预测依据。
