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- W2090670475 endingPage "1184" @default.
- W2090670475 startingPage "1181" @default.
- W2090670475 abstract "Class I phosphoinositide-3-kinase (PI3K) consists of four isoforms of the catalytic subunit, p110α, -β, -δ and -γ, generated from the genes PIK3CA, -B, -D and -G, respectively. These isoforms show different tissue distribution and some specific and indispensable functions in various biological pathways such as development, inflammation, autoimmunity and malignancy. In human cancers, frequent genomic amplification and gain-of-function mutations of PIK3CA were reported, which suggests an oncogenic potential. However, the role played by the other three isoforms in human cancer remains to be determined. We wanted to investigate the relationship between all the isoforms in human cancers. Here, we have established a system for the simultaneous absolute-quantification of all four isoforms by real-time reverse transcription polymerase chain reaction (RT-PCR). The reliability of this system was confirmed using three main criteria: (i) good correlation of each standard curve, (ii) high specificity of the PCR reactions and (iii) excellent reproducibility. Using this system, we investigated human monocytic leukemia cells (U937) to analyze expression of all four isoforms. The biological implications of the expression level of the four isoforms of class I PI3K catalytic subunit are discussed." @default.
- W2090670475 created "2016-06-24" @default.
- W2090670475 creator A5003695970 @default.
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- W2090670475 date "2007-01-01" @default.
- W2090670475 modified "2023-10-04" @default.
- W2090670475 title "Absolute Quantification of Four Isoforms of the Class I Phosphoinositide-3-kinase Catalytic Subunit by Real-Time RT-PCR" @default.
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- W2090670475 doi "https://doi.org/10.1248/bpb.30.1181" @default.
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