Teratologic effects of LSD in explanted early chick embryos

Area of Science:

• Developmental biology
• Pharmacology
• Teratology

Background:

• Lysergic acid diethylamide (LSD) is a potent psychoactive substance.
• Understanding the impact of teratogens on early embryonic development is crucial for public health.
• The effects of LSD on embryonic development are not well-documented.

Purpose of the Study:

• To investigate the teratogenic effects of LSD on early chick embryo development.
• To determine the dose-dependent effects of LSD on embryonic morphogenesis and physiology.
• To assess the reversibility of LSD-induced developmental abnormalities.

Main Methods:

• Chick embryos at stages 4-7 were explanted and cultured for 20 hours.
• Embryos were exposed to varying concentrations of LSD (≥10 µg/ml).
• Morphological and physiological parameters, including axial structures, somites, heart development, pulse rate, cell morphology, and mitotic activity, were assessed.

Main Results:

• LSD exposure (≥10 µg/ml) induced abnormalities in axial structures, particularly somites, in over 50% of embryos.
• LSD significantly lowered embryonic pulse rate but did not affect heart morphogenesis.
• Cellular degeneration was observed in severely affected structures, but LSD did not alter cell morphology or mitotic activity.
• Embryos exposed to LSD for 4-5 hours retained the ability to undergo normal morphogenesis upon subculturing on a plain medium, indicating reversibility.

Conclusions:

• LSD exhibits teratogenic potential, primarily affecting axial development and cardiac function in early chick embryos.
• The observed developmental abnormalities induced by LSD are reversible, suggesting a transient impact on developmental processes.
• This study highlights the importance of avoiding teratogenic substance exposure during critical developmental windows.