Prenatal Coca Paste Exposure Impairs Hippocampal Neuronal Development and Recognition Memory in Offspring

Area of Science:

• Neuroscience
• Developmental Biology
• Public Health

Background:

• Illicit psychostimulant use during pregnancy poses significant public health risks.
• Prenatal exposure to crack cocaine and coca paste (CP) is linked to neurodevelopmental impairments in children.
• Specific neurodevelopmental consequences of prenatal CP exposure are not well understood.

Purpose of the Study:

• To investigate the effects of prenatal exposure to street-grade coca paste (CP) on hippocampal development and function in a rat model.
• To assess impacts on neuronal structure, synaptogenesis, and hippocampus-dependent memory.

Main Methods:

• Rats were exposed to CP daily from gestational day 8 to 21.
• Hippocampal neurons from neonates were analyzed for survival, neurite outgrowth, and dendritic complexity.
• Synaptic markers (vGlut1) and recognition memory were evaluated in juvenile offspring.

Main Results:

• Prenatal CP exposure reduced neuronal survival, neurite outgrowth, and dendritic complexity.
• Decreased vGlut1 abundance indicated impaired synaptogenesis.
• Offspring exhibited significant deficits in recognition memory.

Conclusions:

• Prenatal CP exposure disrupts hippocampal development and neuronal structure.
• These disruptions lead to cognitive deficits, specifically in recognition memory.
• The study underscores the severe neurodevelopmental risks of prenatal CP exposure and the need for prevention.