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Abstract Title:

Melatonin, minocycline and ascorbic acid reduce oxidative stress and viral titers and increase survival rate in experimental Venezuelan equine encephalitis.

Abstract Source:

Brain Res. 2015 Jul 10. Epub 2015 Jul 10. PMID: 26168898

Abstract Author(s):

Nereida Valero, Jesús Mosquera, Sirley Alcocer, Ernesto Bonilla, Jenny Salazar, Melchor Álvarez-Mon

Article Affiliation:

Nereida Valero

Abstract:

Venezuelan equine encephalitis (VEE) virus causes an acute central nervous system infection in human and animals. Melatonin (MLT), minocycline (MIN) and ascorbic acid (AA) have been shown to have antiviral activities in experimental infections; however, the mechanisms involved are poorly studied. Therefore, the aim of this study was to determine the effects of those compounds on the viral titers, NO production and lipid peroxidation in the brain of mice and neuroblastoma cultures infected by VEE virus. Infected mouse (10 LD50) were treated with MLT (500μg /kg bw), MIN (50mg /kg bw) or AA (50mg /kg bwl). Infected neuroblastoma cultures (MOI: 1); MLT: 0.5, 1, 5mM, MIN: 0.1, 0.2, 2μM or AA: 25, 50, 75μM. Brains were obtained at days 1, 3 and 5. In addition, survival rate of infected treated mice was also analyzed. Viral replication was determinedby the plaque formation technique. NO and lipid peroxidation were measured by Griess' reaction and thiobarbituric acid assay respectively. Increased viral replication, NO production and lipid peroxidation were observed in both, infected brain and neuroblastoma cell cultures compared with uninfectedcontrols. Those effects were diminished by the studied treatments. In addition, increased survival rate (50%) in treated infected animals compared with untreated infected mice (0%) was found. MLT, MIN and AA have an antiviral effect involving their anti-oxidant properties, and suggesting a potentialuse of these compounds for human VEE virus infection.

Study Type : Animal Study

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Sayer Ji
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