Delayed developmental effects following prenatal exposure to drugs
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Published on: August 25, 2014
1Gemma Calamandrei, Laboratory of Comparative Toxicology and Ecotoxicology and of Organ and System Pathophysiology, Istituto Superiore di Sanita, Rome, Italy. alberto@iss.it
Abstract:
Increasing evidence points to the possible risks of delayed effects upon prenatal exposure to chemicals; the evaluation of such effects may pose serious problems to clinicians, epidemiologists and toxicologists. In fact, several systems (e.g., nervous, excretory) show important developmental processes well after the organogenetic period, up to the postnatal phase; accordingly, these are also expected to be sensitive targets of developmental toxicants, resulting in impairment of the function and/or functional reserve. This review describes the effects of several groups of drugs on the functional maturation and histogenesis of the kidney (e.g., aminoglycosides, angiotensin-converting enzyme inhibitors, indomethacin) and brain (e.g., anticonvulsivants, antiretroviral compounds, benzodiazepines) upon exposure in utero of humans and laboratory animals. The available data stress the importance for risk assessment of an adequate knowledge of both developmental biology and mechanisms of toxicity. The design of developmental toxicity studies should allow an evaluation of targets most relevant for a given drug (or group of drugs); moreover, the analysis of functional development should receive the due attention within the safety assessment of chemicals.
Insights
Prenatal exposure to certain chemicals can cause delayed health issues, particularly affecting the developing brain and kidneys. Understanding developmental biology and toxicity mechanisms is crucial for accurate risk assessment.
Area of Science:
- Developmental Toxicology
- Pharmacology
- Neuroscience
- Nephrology
Background:
- Prenatal exposure to chemicals poses risks of delayed adverse effects.
- Evaluating these effects is challenging for clinicians, epidemiologists, and toxicologists.
- Nervous and excretory systems undergo critical development post-organogenesis, making them vulnerable to toxicants.
Purpose of the Study:
- To review the effects of various drug classes on kidney and brain development following in utero exposure.
- To highlight the importance of developmental biology and toxicity mechanisms in risk assessment.
- To emphasize the need for functional development analysis in chemical safety evaluations.
Main Methods:
- Literature review of studies on prenatal exposure to specific drug classes.
- Analysis of effects on kidney histogenesis and function.
- Analysis of effects on brain functional maturation and histogenesis.
- Inclusion of data from human and animal studies.
Main Results:
- Specific drug groups (aminoglycosides, ACE inhibitors, indomethacin) impact kidney development.
- Other drug classes (anticonvulsants, antiretrovirals, benzodiazepines) affect brain development.
- Delayed functional impairments can result from prenatal toxicant exposure.
Conclusions:
- Adequate knowledge of developmental biology and toxicity mechanisms is vital for risk assessment.
- Developmental toxicity studies must evaluate relevant drug targets.
- Functional development analysis is essential for comprehensive chemical safety assessment.
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