PtDr101基因从三倍体毛白杨(Popu1us tomentosa× P. bolleana)×P.tomentosa]中克隆获得,能够编码NBS-LRR型蛋白,受到水杨酸和甲基茉莉酸诱导表达,是一种广谱的抗病基因。本研究利用实时定量PCR技术分析转PtDr101基因hpRNA干...PtDr101基因从三倍体毛白杨(Popu1us tomentosa× P. bolleana)×P.tomentosa]中克隆获得,能够编码NBS-LRR型蛋白,受到水杨酸和甲基茉莉酸诱导表达,是一种广谱的抗病基因。本研究利用实时定量PCR技术分析转PtDr101基因hpRNA干扰载体的表达模式,分析发现4个表达模式显著差异的转基因株系,为进一步功能鉴定提供材料。本研究表明实时定量PCR能够高灵敏度、精确地检测hpRNA干扰情况下的基因表达量。展开更多
Molecular profiling of gene expression is important for determining signatures in cancer progression and diagnosis.For this purpose,polymerase chain reactionbased techniques are preferentially used as a feasible and s...Molecular profiling of gene expression is important for determining signatures in cancer progression and diagnosis.For this purpose,polymerase chain reactionbased techniques are preferentially used as a feasible and sensitive approach.Nevertheless,when relative quantitative analyses are performed on gene expression,the interpretation of mathematical equations must be carefully done.This letter to the editor is focused on recently published gene expression data in World Journal of Gastroenterology by Ozmen et al demonstrating increased levels of LYVE-1,VEGFR-3 and CD44 genes in gastric cancer samples compared to nonneoplastic gastric tissues.However,there are major concerns about misinterpretation of the gene expression data obtained with the 2-ΔΔCt relative quantitative method.In the study,2-ΔΔCt values calculated for many samples were smaller than 1(2-ΔΔCt < 1) which indicate decreased levels of LYVE-1,VEGFR-3 and CD44 gene expression in the gastric cancer tissues.This unfortunate mistake is an important example showing how a simple error in the interpretation of relative-quantitative gene expression data may result in misleading scientific conclusions.In this letter,a brief explanation of the 2-ΔΔCt method is given.In addition,the importance of technical quality and interpretation in gene expression studies is discussed.展开更多
文摘PtDr101基因从三倍体毛白杨(Popu1us tomentosa× P. bolleana)×P.tomentosa]中克隆获得,能够编码NBS-LRR型蛋白,受到水杨酸和甲基茉莉酸诱导表达,是一种广谱的抗病基因。本研究利用实时定量PCR技术分析转PtDr101基因hpRNA干扰载体的表达模式,分析发现4个表达模式显著差异的转基因株系,为进一步功能鉴定提供材料。本研究表明实时定量PCR能够高灵敏度、精确地检测hpRNA干扰情况下的基因表达量。
文摘Molecular profiling of gene expression is important for determining signatures in cancer progression and diagnosis.For this purpose,polymerase chain reactionbased techniques are preferentially used as a feasible and sensitive approach.Nevertheless,when relative quantitative analyses are performed on gene expression,the interpretation of mathematical equations must be carefully done.This letter to the editor is focused on recently published gene expression data in World Journal of Gastroenterology by Ozmen et al demonstrating increased levels of LYVE-1,VEGFR-3 and CD44 genes in gastric cancer samples compared to nonneoplastic gastric tissues.However,there are major concerns about misinterpretation of the gene expression data obtained with the 2-ΔΔCt relative quantitative method.In the study,2-ΔΔCt values calculated for many samples were smaller than 1(2-ΔΔCt < 1) which indicate decreased levels of LYVE-1,VEGFR-3 and CD44 gene expression in the gastric cancer tissues.This unfortunate mistake is an important example showing how a simple error in the interpretation of relative-quantitative gene expression data may result in misleading scientific conclusions.In this letter,a brief explanation of the 2-ΔΔCt method is given.In addition,the importance of technical quality and interpretation in gene expression studies is discussed.
