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Brain maldevelopment and delayed neuro-behavioural deviations, induced by perinatal insults, and possibilities of
Insights
Perinatal insults can disrupt brain development, leading to long-term neurobehavioral issues. Early pyritinol treatment effectively prevented these adverse effects in animal models and high-risk newborns.
Area of Science:
- Neuroscience
- Developmental Biology
- Pharmacology
Background:
- Perinatal insults disrupt sensitive periods of central nervous system (CNS) development, causing subtle abnormalities that manifest as neurobehavioral deviations.
- Animal models, particularly rats, are crucial for studying perinatal brain development due to their postnatal brain growth spurt.
- Previous models involving prolonged malnutrition were complex; therefore, a short-term protein synthesis inhibition model was developed.
Purpose of the Study:
- To investigate the pathogenetic processes of perinatal brain maldevelopment induced by noxious insults.
- To evaluate the brain maldevelopment-regulatory effects of nootropics, specifically pyritinol.
- To confirm the efficacy of pyritinol in mitigating neuro-psycho-pathological sequelae in high-risk newborns.
Main Methods:
- Established two experimental rat models: prolonged neonatal malnutrition and short-term cycloheximide-induced protein synthesis inhibition.
- Administered pyritinol to rats following noxious interventions to assess its preventative effects on brain maldevelopment.
- Conducted a clinical controlled prospective study on 128 high-risk newborns to evaluate pyritinol's effects on perinatal distress outcomes.
Main Results:
- Neonatal malnutrition in rats led to behavioral abnormalities and brain alterations in adulthood.
- Cycloheximide treatment in 7-day-old rats resulted in delayed behavioral deviations and permanent brain changes.
- Pyritinol administration prevented brain maldevelopment and functional disturbances in both experimental models.
- Clinical study confirmed favorable effects of early and long-term pyritinol treatment on neuro-psycho-pathological outcomes in high-risk newborns.
Conclusions:
- Perinatal insults significantly disrupt brain development, leading to lasting functional deficits.
- Pyritinol demonstrates potent neuroprotective and developmental regulatory effects against perinatal brain injury.
- Early pyritinol intervention offers a promising therapeutic strategy for mitigating the long-term consequences of perinatal distress in vulnerable infants.
Abstract:
Noxious insults interfering perinatally lead to disorganization of normal perinatal brain development characterized by growth acceleration and intensive histogenesis and known as a sensitive "vulnerable" period of CNS development. Thus induced abnormities, sometimes very discrete, give rise to functional pathology which becomes apparent gradually during maturation as neurobehavioural deviations. For the study of these pathogenetic processes, two experimental models were established. Rat was chosen as an advantageous model animal since the "brain growth spurt" occurring in man in the third trimester of gravidity is shifted postnatally in this altricial species. Prolonged neonatal malnutrition (days 1-40) lead in adult rats to behavioural abnormities (hyperactivity, stereotypy, decreased adaptability, aggressivity) associated with biochemical and electrophysiological alterations in the brain. But this multifactorial and long-term insult was not suitable for more precise analysis. Therefore short-term inhibition of protein synthesis was induced in 7-day-old rats by cycloheximide which resulted in delayed behavioural deviations (hyperactivity, decreased habituation, learning deficit, motor incoordination) connected with permanent morphological, biochemical and endocrinological alterations. These models were used for testing brain maldevelopment-regulatory action of nootropics. Pyritinol administered for 7-10 days following the noxious intervention prevented the brain maldevelopment and functional disturbances in both experimental models. Favourable effects of early and long-term pyritinol treatment on neuro-psycho-pathological sequels of perinatal distress were confirmed in clinical controlled prospective study of 128 high-risk newborns.