[No authors listed]
Analysis of the effect of a caspase-3 inhibitor on the content of the amyloid-degrading neuropeptidase neprilysin (NEP) in the cortex of rats subjected to prenatal hypoxia (7% O2, 3 h) on the 14-th day of the embryonic development (E14) was performed. It was found that rats subjected to prenatal hypoxia on days 20-30 after birth have an increased content and activity of caspase-3 with reduced levels of NEP and of the C-terminal fragment of the amyloid precursor protein (AICD) regulating NEP expression. In hypoxic animals 3 days after a single injection of a caspase inhibitor (i. v., Ac-DEVD-CHO, P20) the content of AICD and NEP was found to be increased up to the levels observed in control rats. The data obtained suggest that the increase of caspase-3 enzyme activity could affect NEP expression via proteolytic degradation of its transcription factor AICD. These data for the first time demonstrate the role of caspases in AICD-dependent regulation of NEP production in the brain of mammals under hypoxic conditions.
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