Mitochondrial alterations accompanied by oxidative stress conditions in skin fibroblasts of Huntington’s disease patients

Paulina Jędrak , Paweł Mozolewski , Grzegorz Węgrzyn , Mariusz R. Więckowski

Abstract

Huntington disease (HD) is an autosomal dominant neurodegenerative disorder manifesting as progressive impairment of motor function and different neuropsychiatric symptoms caused by an expansion of CAG repeats in huntingtin gene (HTT). Mitochondrial dysfunction and bioenergetic defects can contribute to the course of the disease, however, the molecular mechanism underlying this process is still largely unknown. In this study, we aimed to determine several mitochondrial parameters in HD fibroblasts and assess their relevance to the disease progression as well as to value mitochondrial pathology in peripheral cells as disease potential biomarker. We showed that HD fibroblasts demonstrate significantly lower growth rate compared to control fibroblasts despite the lack of cell cycle perturbations. In order to investigate mitochondrial contribution to cell growth differences between HD and healthy cells, we provided insight into various mitochondrial parameters. Conducted experiments have revealed a significant reduction of the ATP level in HD fibroblasts accompanied by a decrease in mitochondrial metabolic activity in relation to the cells from healthy donors. Importantly, there were no differences in the mitochondrial membrane potential (mtΔΨ) and OXPHOS complexes’ levels. Slightly increased level of mitochondrial superoxide (mt. O2•-), but not cytosolic reactive oxygen species (cyt. ROS), has been demonstrated. We have also observed significantly elevated levels of some antioxidant enzymes (SOD2 and GR) which may serve as an indicator of antioxidant defense system in HD patients. Thus, we suggest that mitochondrial alterations in skin fibroblasts of Huntington’s disease patients might be helpful in searching for novel disease biomarkers.
Autor Paulina Jędrak (WB / KBM)
Paulina Jędrak
- Katedra Biologii Molekularnej
, Paweł Mozolewski (WB / KBiGM)
Paweł Mozolewski
- Katedra Biologii i Genetyki Medycznej
, Grzegorz Węgrzyn (WB / KBM)
Grzegorz Węgrzyn
- Katedra Biologii Molekularnej
, Mariusz R. Więckowski - [Nencki Institute of Experimental Biology of the Polish Academy of Sciences]
Mariusz R. Więckowski
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Tytuł czasopisma/seriiMetabolic Brain Disease, ISSN 0885-7490, (A 20 pkt)
Rok wydania2018
Tom33
Nr6
Paginacja2005-2017
Objętość publikacji w arkuszach wydawniczych0.6
Słowa kluczowe w języku angielskimmitochondria, oxidative stress, Huntington disease, fibroblasts
Klasyfikacja ASJC2804 Cellular and Molecular Neuroscience; 2728 Clinical Neurology; 1303 Biochemistry
DOIDOI:10.1007/s11011-018-0308-1
URL https://doi.org/10.1007/s11011-018-0308-1
Języken angielski
LicencjaInny; licence.documentVersion.FINAL_PUBLISHED; Uznanie Autorstwa (CC-BY); w dniu opublikowania
Punktacja (całkowita)20
PunktacjaPunktacja MNiSW = 20.0, 10-09-2019, ArticleFromJournal
Wskaźniki publikacji Cytowania Scopus = 3; Cytowania WoS = 1; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 0.798; Impact Factor WoS: 2017 = 2.441 (2) - 2017=2.481 (5)
Liczba cytowań*6 (2019-09-20)
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