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GAŇOVÁ, M. WANG, X. YAN, Z. ZHANG, H. LEDNICKÝ, T. KORABEČNÁ, M. NEUŽIL, P.
Originální název
Temperature non-uniformity detection on dPCR chips and temperature sensor calibration
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
A microfluidic-based digital polymerase chain reaction (dPCR) chip requires precise temperature control as well as uniform temperature distribution to ensure PCR efficiency. However, measuring local temperature and its distribution over thousands of μL/nL-volume samples with minimum disturbance is challenging. Here, we present a method of non-contact localized temperature measurement for determination of the non-uniformity of temperature distribution over a dPCR chip. We filled the dPCR chip with a PCR solution containing amplified DNA fragments with a known melting temperature (TM). We then captured fluorescent images of the chip when it was heated from 70 to 99 °C, plotted the fluorescence intensity of each partition as a function of temperature, and calculated measured TM values from each partition. Finally, we created a 3-D map of the dPCR chip with the measured TM as the parameter. Even when the actual TM of the PCR solution was constant, the measured TM value varied between locations due to temperature non-uniformity in the dPCR chip. The method described here thereby characterized the distribution of temperature non-uniformity using a PCR solution with known TM as a temperature sensor. Among the non-contact temperature measurement methods, the proposed TM-based method can determine the temperature distribution within the chip, instead of only at the chip surface. The method also does not suffer from the undesirable photobleaching effect of fluorescein-based temperature measurement method. Temperature determination over the dPCR chip based on TM allowed us to calibrate the temperature sensor and improve the dPCR configuration and precision. This method is also suitable for determining the temperature uniformity of other microarray systems where there is no physical access to the system and thus direct temperature measurement is not possible.
Klíčová slova
Fluorescence; Photobleaching; Polymerase chain reaction; Temperature measurement; Temperature sensors; Thermometers
Autoři
GAŇOVÁ, M.; WANG, X.; YAN, Z.; ZHANG, H.; LEDNICKÝ, T.; KORABEČNÁ, M.; NEUŽIL, P.
Vydáno
12. 1. 2022
Nakladatel
Royal Society of Chemistry
ISSN
2046-2069
Periodikum
RSC Advances
Ročník
12
Číslo
4
Stát
Spojené království Velké Británie a Severního Irska
Strany od
2375
Strany do
2382
Strany počet
8
URL
https://pubs.rsc.org/en/content/articlelanding/2022/RA/D1RA08138A
Plný text v Digitální knihovně
http://hdl.handle.net/11012/204605
BibTex
@article{BUT176929, author="Martina {Gaňová} and Xinlu {Wang} and Zhiqiang {Yan} and Haoqing {Zhang} and Tomáš {Lednický} and Marie {Korabečná} and Pavel {Neužil}", title="Temperature non-uniformity detection on dPCR chips and temperature sensor calibration", journal="RSC Advances", year="2022", volume="12", number="4", pages="2375--2382", doi="10.1039/d1ra08138a", issn="2046-2069", url="https://pubs.rsc.org/en/content/articlelanding/2022/RA/D1RA08138A" }