Аннотация:The reason of different diseases of newborns and prepuberty often
lies in prenatal life, where the lack of oxygen is considered to be
one of the main interfering factors. Hypoxy-ishemic damage of
brain tissue in prenatal period is considered to be one of the main
causes of newborn’s death and isuspected to increase the risk of
schizophrenia, epilepsy, deficit hyperactivity disorder, mental. The
females of nonlinear white rats were subjected to acute hypobaric
hypoxia on the 9−10th day of gestation corresponding to the
beginning of organogenesis. Using flow cytometry technique we
examined the neuronal resistance to oxidative stress induced by
preincubation of cells with H2O2. The primary culture of neurons
was isolated from cerebellums of 8−10-day-old rats. Tissue
slices was processed by collagenaza with following perturbation
and filtering cells through teflon strainer. Experimental group
consisted of rat pups born from females, subjected to acute
hypoxia on the 9−10th day of gestation. The determination of
active forms of oxygen was performed using the method of
flow cytometry with the help of fluorescent probe – H2DCFDA
(2’,7’-dichlorodihydrofluorescein diacetate). The amount of dead
cells in suspension was determined from the fluorescence of
propidium iodide, glutathione content – from fluorescence of
CMFDA (5-chloromethylfluorescein diacetate). Active forms of
oxygen content in neurons of control and experimental animals
did not significantly differ. Preincubation of neuron suspension
with 10mM H2O2 for 30 min led to the significant increase of
active forms of oxygen level either in experimental or in control
group, though H2O2-induced enhance in the latter case was 1,5−6
times less. The increased level of active forms of oxygen was not
accompanied with elevation in amount of dead cells. Preincubation
of cell suspension with 3 mM CMFDA has shown that glutathione
content in neurons, isolated from brain of experimental animals,
was 1,3−2 times lower than in control cells. Thereby, oxidative
stress-induced increase of active forms of oxygen level in animals
survived from prenatal hypoxia correlates with baseline low level
of glutathione content. As glutathione seems to be one of the main
cellular antioxidants, the decrease of its level suggests greater
sensitivity of experimental animals to oxidative stress.