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[Plurality in the determinism of organophosphorus teratogenic effects (author's transl)]
Abstract:
In Quail embryos, nicotinamide prevents beak and legs abnormalities produced by bidrin but remains inefficient against vertebral defects induced by bidrin and parathion. In contrast, the vertebral deficiencies are greatly alleviated or abolished by pralidoxim, an antidote known and used in organophosphorus intoxications. From these observations, a plurality in the determinism of teratogenic effects induced by organophosphorus compounds is evident.
Insights
Nicotinamide (NA) partially protected quail embryos from bidrin-induced limb and beak defects. Pralidoxime (2-PAM) effectively countered vertebral abnormalities from bidrin and parathion, indicating diverse mechanisms in organophosphate-induced teratogenicity.
Area of Science:
- Developmental toxicology
- Embryology
- Neuroscience
Background:
- Organophosphorus compounds (OPCs) are widely used pesticides with known neurotoxic effects.
- OPCs can induce developmental abnormalities (teratogenicity) in embryos.
- The specific mechanisms underlying OPC-induced teratogenicity are not fully understood.
Purpose of the Study:
- To investigate the efficacy of nicotinamide (NA) and pralidoxime (2-PAM) in preventing specific organophosphate-induced teratogenic effects in quail embryos.
- To explore the potential for distinct etiological pathways in organophosphate-induced developmental defects.
Main Methods:
- Quail embryos were exposed to organophosphates (bidrin, parathion) during development.
- Embryos were treated with nicotinamide or pralidoxime to assess protective effects.
- Teratogenic effects, including beak, leg, and vertebral abnormalities, were evaluated.
Main Results:
- Nicotinamide effectively prevented beak and leg abnormalities induced by bidrin.
- Nicotinamide showed limited efficacy against vertebral defects caused by bidrin and parathion.
- Pralidoxime significantly alleviated or abolished vertebral deficiencies induced by both bidrin and parathion.
Conclusions:
- The findings suggest a plurality in the determinism of teratogenic effects induced by organophosphorus compounds.
- Different OPC-induced developmental abnormalities may arise from distinct underlying mechanisms.
- The differential efficacy of NA and 2-PAM highlights the complexity of OPC teratogenesis.