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[Perinatal pharmacotherapy and the risk of functional teratogenic defects]
O Benesová1, H Tejkalová, Z Kristofiková
1Psychiatrické centrum, Praha.
Abstract:
Perinatal period, which is characterized by intensive histogenesis and cytodifferentiation of the already shaped organs, is a highly vulnerable phase for fetal/neonatal brain and immune system-organs with high similarity in receptor equipment. Even fine deviations in the programmed developmental processes induced by drugs initiate disorders in the formation of neural network, cytoarchitectonics and receptor-transmitter communication systems. This pathology is not evident at birth, but forms the basis for various functional defects of neuro-psycho-immunocompetence which become apparent gradually during further maturation or even in adulthood. Clinical recognition of such functional teratogenic action of drugs is hampered by the long time interval (upto decades) between the drug administration and its consequences, making the identification of causal relations very difficult. Consequently, experimental research is necessary under the precondition of adequate animal models with sufficient validity for the extrapolation on human level. The authors suggest the principles of such approach using drug application in neonatal rats with lifelong follow-up of behaviour, immune reactivity and brain biochemical analysis. The evaluation of functional teratogenic risk in three drugs used in the treatment of risk pregnancies and risk neonates (dexamethazone, fenoterol, diazepam) is presented.
Insights
Neonatal drug exposure can disrupt brain and immune development, leading to long-term neuro-psycho-immunocompetence deficits. Valid animal models are crucial for assessing the functional teratogenic risk of medications used during pregnancy and in newborns.
Area of Science:
- Neuroscience
- Developmental Biology
- Immunology
Context:
- The perinatal period is critical for brain and immune system development, making fetuses and neonates highly susceptible to environmental influences.
- Medications administered during pregnancy or to newborns can interfere with programmed developmental processes, leading to subtle but significant long-term functional deficits.
Purpose:
- To establish principles for a valid animal model to assess the functional teratogenic risk of drugs.
- To evaluate the long-term neurodevelopmental and immunologic consequences of specific drug exposures in the perinatal period.
Summary:
- Neonatal rats were administered dexamethasone, fenoterol, or diazepam, followed by lifelong monitoring of behavior, immune reactivity, and brain biochemistry.
- This approach allows for the identification of subtle, delayed-onset functional deficits resulting from perinatal drug exposure, mimicking human clinical challenges.
Impact:
- Provides a framework for evaluating the functional teratogenic risk of medications used in high-risk pregnancies and neonates.
- Highlights the importance of long-term follow-up studies to understand the full impact of perinatal drug exposure on neuro-psycho-immunocompetence.