Glial cell-derived neurotrophic factor decrease may mediate learning, memory and behavior impairments in rats after...

Area of Science:

• Neuroscience
• Developmental Biology
• Surgical Research

Background:

• Neonatal surgery is linked to behavioral abnormalities.
• Glial cell-derived neurotrophic factor (GDNF) plays a role in cognitive functions.
• Previous research indicated GDNF's involvement in surgery-induced learning and memory deficits.

Purpose of the Study:

• To investigate if neonatal surgery causes hyperactive behavior alongside learning and memory deficits.
• To determine the role of GDNF in these surgery-induced behavioral and cognitive changes.
• To explore the impact of surgery on neuronal microstructure and GDNF expression.

Main Methods:

• Postnatal day 7 rats underwent surgical procedures under sevoflurane anesthesia.
• Learning, memory, and behavior were assessed using Barnes maze, fear conditioning, and open field tests.
• Glial cell-derived neurotrophic factor (GDNF) was administered intracerebroventricularly post-surgery.

Main Results:

• Surgery impaired learning and memory, and induced hyperactive behavior in rats.
• Reduced GDNF expression in the hippocampus and decreased dendritic arborization/spine density were observed post-surgery.
• Intracerebroventricular GDNF injection attenuated the surgery-induced cognitive deficits and behavioral changes.

Conclusions:

• Neonatal surgery can lead to long-term hyperactive behavior, impaired learning and memory, and neuronal damage in rats.
• Reduced GDNF levels appear to mediate the adverse effects of neonatal surgery.
• GDNF may be a potential therapeutic target for mitigating surgery-induced neurodevelopmental issues.