An Analysis of Efficiency and Melt Curve Effects on Quantitative Polymerase Chain Reaction (qPCR) Inhibition

Real-time or quantitative PCR (qPCR) is an innovative method used to determine the amount of amplifiable DNA in a biological sample. Typically, a fluorescent dye is introduced during thermal cycling, causing a change in fluorescent output as the double-stranded DNA (dsDNA) product accumulates. Both...

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Main Author: Thompson, Robyn E
Format: Others
Published: FIU Digital Commons 2010
Subjects:
DNA
Online Access:http://digitalcommons.fiu.edu/etd/329
http://digitalcommons.fiu.edu/cgi/viewcontent.cgi?article=1408&context=etd
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spelling ndltd-fiu.edu-oai-digitalcommons.fiu.edu-etd-14082018-01-05T15:32:04Z An Analysis of Efficiency and Melt Curve Effects on Quantitative Polymerase Chain Reaction (qPCR) Inhibition Thompson, Robyn E Real-time or quantitative PCR (qPCR) is an innovative method used to determine the amount of amplifiable DNA in a biological sample. Typically, a fluorescent dye is introduced during thermal cycling, causing a change in fluorescent output as the double-stranded DNA (dsDNA) product accumulates. Both TaqMan® and Plexor HY System methods detect PCR inhibition through the monitoring of internal control sequences. Alternatively, SYBR®Green and Plexor detect inhibition through melt curve effects. Previous work using SYBR®Green intercalation has demonstrated that inhibitors can affect melt curves differently depending on their structure and mode of action. Inhibitors that bind DNA can cause melt curve shifts while those primarily affecting Taq polymerase do not. Unlike SYBR®Green, Plexor dyes are fluorescently linked to a modified base, 5'-methylisocytosine (iso-dC), adjacent to the 5' end of the dsDNA. This produces minimal interference in dsDNA structure making it an ideal procedure for measuring these effects. In this study, inhibition of qPCR was evaluated by observing the effects of various inhibitor concentrations and amplicon lengths on DNA amplification. 2010-11-10T08:00:00Z text application/pdf http://digitalcommons.fiu.edu/etd/329 http://digitalcommons.fiu.edu/cgi/viewcontent.cgi?article=1408&context=etd FIU Electronic Theses and Dissertations FIU Digital Commons qPCR Inhibition DNA Binding Melt Amplification Efficiency Forensic
collection NDLTD
format Others
sources NDLTD
topic qPCR
Inhibition
DNA
Binding
Melt
Amplification
Efficiency
Forensic
spellingShingle qPCR
Inhibition
DNA
Binding
Melt
Amplification
Efficiency
Forensic
Thompson, Robyn E
An Analysis of Efficiency and Melt Curve Effects on Quantitative Polymerase Chain Reaction (qPCR) Inhibition
description Real-time or quantitative PCR (qPCR) is an innovative method used to determine the amount of amplifiable DNA in a biological sample. Typically, a fluorescent dye is introduced during thermal cycling, causing a change in fluorescent output as the double-stranded DNA (dsDNA) product accumulates. Both TaqMan® and Plexor HY System methods detect PCR inhibition through the monitoring of internal control sequences. Alternatively, SYBR®Green and Plexor detect inhibition through melt curve effects. Previous work using SYBR®Green intercalation has demonstrated that inhibitors can affect melt curves differently depending on their structure and mode of action. Inhibitors that bind DNA can cause melt curve shifts while those primarily affecting Taq polymerase do not. Unlike SYBR®Green, Plexor dyes are fluorescently linked to a modified base, 5'-methylisocytosine (iso-dC), adjacent to the 5' end of the dsDNA. This produces minimal interference in dsDNA structure making it an ideal procedure for measuring these effects. In this study, inhibition of qPCR was evaluated by observing the effects of various inhibitor concentrations and amplicon lengths on DNA amplification.
author Thompson, Robyn E
author_facet Thompson, Robyn E
author_sort Thompson, Robyn E
title An Analysis of Efficiency and Melt Curve Effects on Quantitative Polymerase Chain Reaction (qPCR) Inhibition
title_short An Analysis of Efficiency and Melt Curve Effects on Quantitative Polymerase Chain Reaction (qPCR) Inhibition
title_full An Analysis of Efficiency and Melt Curve Effects on Quantitative Polymerase Chain Reaction (qPCR) Inhibition
title_fullStr An Analysis of Efficiency and Melt Curve Effects on Quantitative Polymerase Chain Reaction (qPCR) Inhibition
title_full_unstemmed An Analysis of Efficiency and Melt Curve Effects on Quantitative Polymerase Chain Reaction (qPCR) Inhibition
title_sort analysis of efficiency and melt curve effects on quantitative polymerase chain reaction (qpcr) inhibition
publisher FIU Digital Commons
publishDate 2010
url http://digitalcommons.fiu.edu/etd/329
http://digitalcommons.fiu.edu/cgi/viewcontent.cgi?article=1408&context=etd
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