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Reassembly of the tight junction after oxidativestress depends on tyrosinase kinase activity
Authors:R. Joro, A. Korkmaz, T.A. Lakka, A.L.T. Uusitalo, and M. Atalay
metabolism [ 4 ], increased oxidativestress [ 6, 7 ], muscle microtrauma-induced chronic inflammation [ 5 ], and inappropriate production and activities of cytokines such as interleukin-6 (IL-6) [ 8 ], as well as hormonal alterations [ 9–12 ]. Notably, the
Authors:Karl-Heinz Smolle, Peter Kaufmann, Vanessa Stadlbauer, Franz Tatzber, Brigitte M. Winklhofer-Roob, Reingard Aigner, Gholamali Khoschsorur, and Willibald Wonisch
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Authors:Ľubomíra Grešáková, Radka Bořutová, Štefan Faix, Iveta Plachá, Klaudia Čobanová, Božena Košíková, and Ľubomír Leng
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Authors:András Szarka, Gábor Bánhegyi, and Balázs Sümegi
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Authors:M Ninković, M Ninković, M Ninković, Z Maličević, Z Maličević, Z Maličević, A Jelenković, A Jelenković, A Jelenković, DM Jovanović, DM Jovanović, DM Jovanović, M Đukić, M Đukić, M Đukić, I Vasiljević, I Vasiljević, and I Vasiljević
a part of blood-brain barrier, brain capillaries participate in
pathophysiological events during systemic inflammation. We investigated the
effects of 7-nitroindazole (7-NI), selective neuronal nitric oxide synthase
(NOS) inhibitor, to oxidative status (OS) of brain capillaries. Adult Wistar
rats were randomized at groups: control group (CG) (sham operated), sepsis
group (GS) (cecal ligation and perforation with inoculation of Escherichia
coli (ATCC 25922), 7-NI group (G7-NI), (30 mg/kg b/w i. p.) and 7-NI +
sepsis group (G7-NIS), (7-NI was applied 30 minutes before operation). Lipid
peroxidation index (LPI), nitrite concentration, superoxide dismutase (SOD)
activity and superoxide anion (O2·-) content were determined 3, 6, 24 and 48 hour in each
group. Cerebral capillaries were separated from non-vascular brain tissue
using sucrose gradient. Compared to controls, LPI, nitrite and O2·- increased at SG. In the G7-NIS, LPI reached control
values at the 24 th and 48 th hour, while nitrite were
decreased at the 3 rd and 24 th hour, compared to controls. In the same
group, O2·- decreased at the 3 rd, 6 th and 24 th hour, although SOD showed variable activity.
The systematic nNOS inhibition with 7-NI forces OS on early terms of sepsis,
but lately it contributes to the normalization of OS in cerebral capillaries.