Utilization of digital PCR in quantity verification of plasmid standards used in quantitative PCR

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62157124%3A16270%2F20%3A43878496" target="_blank" >RIV/62157124:16270/20:43878496 - isvavai.cz</a>

Alternative codes found

RIV/00027162:_____/20:N0000007 RIV/00216224:14310/20:00116090

Result on the web

<a href="https://www.frontiersin.org/articles/10.3389/fmolb.2020.00155/full" target="_blank" >https://www.frontiersin.org/articles/10.3389/fmolb.2020.00155/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fmolb.2020.00155" target="_blank" >10.3389/fmolb.2020.00155</a>

Result language

angličtina

Original language name

Utilization of digital PCR in quantity verification of plasmid standards used in quantitative PCR

Original language description

Quantitative PCR (qPCR) is a widely used method for nucleic acid quantification of various pathogenic microorganisms. For absolute quantification of microbial load by qPCR, it is essential to create a calibration curve from accurately quantified quantification standards, from which the number of pathogens in a sample is derived. Spectrophotometric measurement of absorbance is a routine method for estimating nucleic acid concentration, however, it may be affected by presence of other potentially contaminating nucleic acids or proteins and salts. Therefore, absorbance measurement is not reliable for estimating the concentration of stock solutions of quantification standards, based on which they are subsequently diluted. In this study, we utilized digital PCR (dPCR) for absolute quantification of qPCR plasmid standards and thus detecting possible discrepancies in the determination of the plasmid DNA number of standards derived from UV spectrophotometry. The concept of dPCR utilization for quantification of standards was applied on 45 qPCR assays using droplet-based and chip-based dPCR platforms. Using dPCR, we found that spectrophotometry overestimated the concentrations of standard stock solutions in the majority of cases. Furthermore, batch-to-batch variation in standard quantity was revealed, as well as quantitative changes in standards over time. Finally, it was demonstrated that droplet-based dPCR is a suitable tool for achieving defined quantity of quantification plasmid standards and ensuring the quantity over time, which is crucial for acquiring homogenous, reproducible and comparable quantitative data by qPCR.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10608 - Biochemistry and molecular biology

Project

<a href="/en/project/QK1810212" target="_blank" >QK1810212: Rapid, complex and multiplex methods for simultaneous detection of food-borne pathogens in food of animal and plant origin</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Frontiers in Molecular Biosciences

ISSN

2296-889X

e-ISSN

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Volume of the periodical

7

Issue of the periodical within the volume

JUL

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

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UT code for WoS article

000561488000001

EID of the result in the Scopus database

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