[Pinealon and Cortexin influence on behavior and neurochemical processes in 18-month aged rats within hypoxia and hypothermia]

The research of Cortexin and Pinealon within two models of stress, acute hypobaric hypoxia and mild hypothermia, within 18-month aged rats has been held. The peculiarities of peptide preparations' influence on behavior and neurochemical indeces have been identified. Cortexin shows a more pronounced effect on free radical processes and caspase 3 activity in brain than Pinealon. Both preparations forward an accumulation of adrenergic mediator within rats' brains in the model of acute hypobaric hypoxia, as well as serotonin within cerebrum cortex in the model of mild hypothermia, which may underlie their geroprotective effects.

[Regulation of content of cytokines in blood serum and of caspase-3 activity in brains of old rats in model of sharp hypoxic hypoxia with Cortexin and Pinealon]

While studying the effects of Cortexin and Pinealon (Glu-Asp-Arg) on the caspase-3 activity in the brain, an interleykin-6 and a factor of tumor necrosis in blood serum of old rats under the sharp hypoxic hypoxia it was suggested that in hypoxia of brain conditions Pinealon forwards the increase of the neurogenesis and the decrease neuroinflammatory reactions to a reference level. With the sharp hypoxic hypoxia Cortexin reduces an ability of brain tissue of programmed cells death, but saves the content of interleykin-6 at high level.

[Effect of peptide geroprotectors on the navigation system learning and caspase-3 in brain structures in rats of different age]

The study of the effects of peptide geroprotectors cortexin and pinealon on the system of caspase-3 in the brain structures and training of rats of different ages was held. Regional changes in activity and the content of caspase-3 in the cerebral cortex and brainstem of young and old rats under the influence of peptides were identified. It is suggested that the functional state of caspase-3 in the brain is one of the reasons that determines the animals' ability to learn. Pinealon has prevalent positive effect on learning of both young and old animals in the Morris labyrinth compared to cortexin.

[Effects of introduction of short peptides before carotid artery occlusion on behaviour and caspase-3 activity in the brain of old rats]

The comparative research of effect of Pinealon and Cortexin on behavior and activity of caspase-3 in a brain of old rats in a model of carotid arteries occlusion was conducted. It is shown that introduction of short peptides promotes a survival rate of the animals that have modeled occlusion of carotid arteries. Under Pinealon before occlusion of carotid arteries, behavioral dream has been increased and a position-finding behavior, a motivational behavior and a motor performance have been reduced. The rats that were introduced Cortexin before carotid arteries occlusion demonstrated the raise of behavioral dream time. At introduction of Pinealon activity of caspase-3 moderately raises in false-operated animals and in a model of occlusion of carotid arteries.

[Effect of deltaran on the mediatory balance in the brain of young and old rats with left-side laterality profile in case of carotid arteries occlusion]

The medico-social significance of ischemic brain lesions, which are the most frequent cause of disablement and death in older people, stipulates the need for efficient means of prevention and correction of central nervous system disorders in case of ischemic brain lesions. The efficacy of Deltaran in the correction of disordered neuromediator balance in the brain of rats of different age groups was studied on the model of carotid arteries occlusion. Studies showed, that Deltaran exerts an anti-stress effect on old rats with left-side profile by altering the neuromediators' distribution in animals' brain under conditions of hypoxia. This enables to recommend Deltaran for further study as a neuroprotector.