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Title: Apparent Polyploidization after Gamma Irradiation: Pitfalls in the Use of Quantitative Polymerase Chain Reaction (qPCR) for the Estimation of Mitochondrial and Nuclear DNA Gene Copy Numbers
Authors: Kam, WWY
Lake, V
Banos, C
Davies, JB
Banati, RB
Keywords: Gamma radiation
Polymerase chain reaction
Issue Date: 1-Jun-2013
Publisher: MDPI AG
Citation: Kam, W. W. Y., Lake, V., Banos, C., Davies, J., & Banati, R. (2013). Apparent Polyploidization after Gamma Irradiation: Pitfalls in the use of quantitative polymerase chain reaction (qPCR) for the estimation of mitochondrial and nuclear DNA gene copy numbers. International Journal of Molecular Science, 14 (6), 11544-11559. doi:10.3390/ijms140611544
Abstract: Quantitative polymerase chain reaction (qPCR) has been widely used to quantify changes in gene copy numbers after radiation exposure. Here, we show that gamma irradiation ranging from 10 to 100 Gy of cells and cell-free DNA samples significantly affects the measured qPCR yield, due to radiation-induced fragmentation of the DNA template and, therefore, introduces errors into the estimation of gene copy numbers. The radiation-induced DNA fragmentation and, thus, measured qPCR yield varies with temperature not only in living cells, but also in isolated DNA irradiated under cell-free conditions. In summary, the variability in measured qPCR yield from irradiated samples introduces a significant error into the estimation of both mitochondrial and nuclear gene copy numbers and may give spurious evidence for polyploidization.© 2013, MDPI Publishing
Gov't Doc #: 5068
ISSN: 1422-0067
Appears in Collections:Journal Articles

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