[Genotype-dependent mice behavior in cognitive tasks. Effect of noopept]

Area of Science:

• Neuroscience
• Behavioral Genetics
• Pharmacology

Background:

• Interstrain differences in cognitive abilities are crucial for understanding learning and memory.
• Mouse models are essential for studying the genetic basis of cognition and the effects of nootropic agents.

Purpose of the Study:

• To investigate strain-specific cognitive performance in C57BL/6J, BALB/c, and DBA/2J male mice.
• To evaluate the genotype-dependent effects of the nootropic drug Noopept on learning, memory, and stimulus-direction extrapolation.

Main Methods:

• Assessment of cognitive performance using a simplified Morris water maze and a stimulus-direction extrapolation task.
• Administration of Noopept (0.5 mg/kg) prior to learning sessions.
• Comparison of performance across three distinct mouse strains (C57BL/6J, BALB/c, DBA/2J).

Main Results:

• C57BL/6J mice exhibited strong learning and memory retention; BALB/c mice showed learning but poor long-term memory; DBA/2J mice demonstrated poor learning.
• Noopept improved long-term memory in BALB/c mice but had no effect on C57BL/6J mice.
• Noopept increased correct stimulus-direction extrapolation in C57BL/6J and BALB/c mice, while DBA/2J performance remained unchanged.

Conclusions:

• Cognitive abilities and memory consolidation differ significantly among C57BL/6J, BALB/c, and DBA/2J mouse strains.
• The efficacy of the nootropic drug Noopept in enhancing cognitive functions, particularly long-term memory and extrapolation, is strongly dependent on the genetic background of the mice.
• These findings highlight the importance of considering genetic variability when developing and testing cognitive-enhancing interventions.