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Open AccessArticle

Neuroprotective Effects of Mitochondria-Targeted Plastoquinone in a Rat Model of Neonatal Hypoxic–Ischemic Brain Injury

1
A. N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
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Institute of Molecular Medicine, Sechenov First Moscow State Medical University, 119991 Moscow, Russia
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Faculty of Fundamental Medicine, Lomonosov Moscow State University, Lomonosovsky Prospekt, house 31-5, 117192 Moscow, Russia
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Faculty of Physics, Lomonosov Moscow State University, Leninskye gory, house 1, building 2, 119991 Moscow, Russia
*
Author to whom correspondence should be addressed.
Molecules 2018, 23(8), 1871; https://doi.org/10.3390/molecules23081871
Received: 18 June 2018 / Revised: 13 July 2018 / Accepted: 25 July 2018 / Published: 27 July 2018
Neonatal hypoxia–ischemia is one of the main causes of mortality and disability of newborns. To study the mechanisms of neonatal brain cell damage, we used a model of neonatal hypoxia–ischemia in seven-day-old rats, by annealing of the common carotid artery with subsequent hypoxia of 8% oxygen. We demonstrate that neonatal hypoxia–ischemia causes mitochondrial dysfunction associated with high production of reactive oxygen species, which leads to oxidative stress. Targeted delivery of antioxidants to the mitochondria can be an effective therapeutic approach to treat the deleterious effects of brain hypoxia–ischemia. We explored the neuroprotective properties of the mitochondria-targeted antioxidant SkQR1, which is the conjugate of a plant plastoquinone and a penetrating cation, rhodamine 19. Being introduced before or immediately after hypoxia–ischemia, SkQR1 affords neuroprotection as judged by the diminished brain damage and recovery of long-term neurological functions. Using vital sections of the brain, SkQR1 has been shown to reduce the development of oxidative stress. Thus, the mitochondrial-targeted antioxidant derived from plant plastoquinone can effectively protect the brain of newborns both in pre-ischemic and post-stroke conditions, making it a promising candidate for further clinical studies. View Full-Text
Keywords: hypoxia–ischemia; mitochondria; mitochondria-targeted antioxidants; plastoquinone; oxidative stress hypoxia–ischemia; mitochondria; mitochondria-targeted antioxidants; plastoquinone; oxidative stress
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Silachev, D.N.; Plotnikov, E.Y.; Pevzner, I.B.; Zorova, L.D.; Balakireva, A.V.; Gulyaev, M.V.; Pirogov, Y.A.; Skulachev, V.P.; Zorov, D.B. Neuroprotective Effects of Mitochondria-Targeted Plastoquinone in a Rat Model of Neonatal Hypoxic–Ischemic Brain Injury. Molecules 2018, 23, 1871.

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