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Atomic force microscopy reveals new biophysical markers for monitoring subcellular changes in oxidative injury: Neuroprotective effects of quercetin at the nanoscale

Jazvinšćak Jembrek, Maja; Vlainić, Josipa; Čadež, Vida; Šegota, Suzana (2018) Atomic force microscopy reveals new biophysical markers for monitoring subcellular changes in oxidative injury: Neuroprotective effects of quercetin at the nanoscale. PLoS One, 13 (10). 0200119-0200141. ISSN 1932-6203

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Abstract

Oxidative stress has been recognised as an important pathological mechanism underlying the development of neurodegenerative diseases. The biomarkers for assessing the degree of oxidative stress have been attracting much interest because of their potential clinical relevance in understanding the cellular effects of free radicals and evaluation of the efficacy of drug treatment. Here, an interdisciplinary approach using atomic force microscopy (AFM) and cellular and biological molecular methods were used to investigate oxidative damage in P19 neurons and to reveal the underlying mechanism of protective action of quercetin. Biological methods demonstrated the oxidative damage of P19 neurons and showed that quercetin improved neuronal survival by preventing H2O2- induced p53 and Bcl-2 down-regulation and modulated Akt and ERK1/2 signalling pathways. For the first time, AFM was employed to evaluate morphologically (roughness, height, Feret dimension) and nanomechanical (elasticity) properties in H2O2-induced neuronal damage. The AFM analysis revealed that quercetin suppressed H2O2-provoked changes in cell membrane elasticity and morphological properties, thus confirming its neuroprotective activity. The obtained results indicate the potential of AFM-measured parameters as a biophysical markers of oxidative stress-induced neurodegeneration. In general, our study suggests that AFM can be used as a highly valuable tool in other biomedical applications aimed at screening and monitoring of drug- induced effects at cellular level.

Item Type: Article
Uncontrolled Keywords: quercetin ; Akt and ERK signalling ; atomic force microscopy ; roughness ; Young’s modulus ; elasticity
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Division of Molecular Medicine
Division of Physical Chemistry
Projects:
Project titleProject leaderProject codeProject type
Zaštitni mehanizmi i učinci flavonoida ugrađenih u nanonosače u modelnim membranama i neuronima-NanoFlavNeuroProtectSuzana ŠegotaIP-2016-06-8415HRZZ
Depositing User: Sofija Konjević
Date Deposited: 04 Dec 2018 12:21
Last Modified: 04 Dec 2018 12:21
URI: http://fulir.irb.hr/id/eprint/4372
DOI: 10.1371/journal.pone.0200119

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