Detection of ROS Generated by UV-C Irradiation of CdS Quantum Dots and their Effect on Damage to Chromosomal and Plasmid DNA

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F18%3A43913547" target="_blank" >RIV/62156489:43210/18:43913547 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/18:PU127820

Výsledek na webu

<a href="https://doi.org/10.1002/elan.201700648" target="_blank" >https://doi.org/10.1002/elan.201700648</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/elan.201700648" target="_blank" >10.1002/elan.201700648</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Detection of ROS Generated by UV-C Irradiation of CdS Quantum Dots and their Effect on Damage to Chromosomal and Plasmid DNA

Popis výsledku v původním jazyce

Different sensitivity of various types of DNA to damage and mutation requires a study of effects of chemical and physical factors on integrity of individual DNA structures. Oxidation stress induced by photoactivated nanoparticles including quantum dots is considered to be the main mechanism of their potential risks. In this work, spectrophotometric indicators of reactive oxygen species (ROS) 4-chloro-7-nitrobenzo-2-oxa-1,3-diazole (NBD-Cl) and -diphenyl--picrylhydrazyl (DPPH), electrochemical DNA-based biosensors with the thiol-capped CdS quantum dots (CdS QDs) immobilized over the chromosomal (ct DNA) and plasmid (pUC19) DNA biorecognition layers and agarose gel electrophoresis were used (i) to detect ROS generated at the UV-C irradiation (=254nm) of CdS QDs and (ii) to assess and evaluate their effect towards the chromosomal and plasmid dsDNA structure. Voltammetric and impedimetric measurements revealed a deep degradation of DNA attached to the glassy carbon electrode surface with a stepwise decrease of the portion of survived pUC19 and ct DNA after 60s to 2400s irradiation time up to 47% and to 32%, resp., comparing to the portion in the absence of CdS QDs reaching 58% and 40%, resp. Agarose gel electrophoresis supported the damage to plasmid and chromosomal DNA demonstrating double strand breaks. A decrease in the stability of DNA types towards degradation by ROS in order pUC19&gt;calf thymus&gt;salmon sperm dsDNA has been found.

Název v anglickém jazyce

Detection of ROS Generated by UV-C Irradiation of CdS Quantum Dots and their Effect on Damage to Chromosomal and Plasmid DNA

Popis výsledku anglicky

Different sensitivity of various types of DNA to damage and mutation requires a study of effects of chemical and physical factors on integrity of individual DNA structures. Oxidation stress induced by photoactivated nanoparticles including quantum dots is considered to be the main mechanism of their potential risks. In this work, spectrophotometric indicators of reactive oxygen species (ROS) 4-chloro-7-nitrobenzo-2-oxa-1,3-diazole (NBD-Cl) and -diphenyl--picrylhydrazyl (DPPH), electrochemical DNA-based biosensors with the thiol-capped CdS quantum dots (CdS QDs) immobilized over the chromosomal (ct DNA) and plasmid (pUC19) DNA biorecognition layers and agarose gel electrophoresis were used (i) to detect ROS generated at the UV-C irradiation (=254nm) of CdS QDs and (ii) to assess and evaluate their effect towards the chromosomal and plasmid dsDNA structure. Voltammetric and impedimetric measurements revealed a deep degradation of DNA attached to the glassy carbon electrode surface with a stepwise decrease of the portion of survived pUC19 and ct DNA after 60s to 2400s irradiation time up to 47% and to 32%, resp., comparing to the portion in the absence of CdS QDs reaching 58% and 40%, resp. Agarose gel electrophoresis supported the damage to plasmid and chromosomal DNA demonstrating double strand breaks. A decrease in the stability of DNA types towards degradation by ROS in order pUC19&gt;calf thymus&gt;salmon sperm dsDNA has been found.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Electroanalysis

ISSN

1040-0397

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

7

Strana od-do

698-704

Kód UT WoS článku

000429708900016

EID výsledku v databázi Scopus

2-s2.0-85045411959