Male-Specific cAMP Signaling in the Hippocampus Controls Spatial Memory Deficits in a Mouse Model of Autism and...

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• Neurodevelopmental disorders show a male bias, with unknown molecular mechanisms.
• Coiled-coil and C2 domain-containing protein 1A (CC2D1A) is linked to intellectual disability and autism spectrum disorder.
• CC2D1A mutations are implicated in neurodevelopmental disorders, but sex-specific effects are unclear.

Purpose of the Study:

• Investigate molecular mechanisms behind sex bias in neurodevelopmental disorders.
• Determine if CC2D1A controls male-specific intracellular signaling pathways.
• Characterize biochemical and behavioral sex differences in a CC2D1A-deficient mouse model.

Main Methods:

• Examined phosphodiesterase 4D (PDE4D) and cyclic adenosine monophosphate (cAMP) signaling in Cc2d1a-deficient mice.
• Conducted behavioral studies on learning and memory in male and female mice.
• Utilized a PDE4D inhibitor to assess the impact of cAMP modulation on behavior.

Main Results:

• Cc2d1a deficiency caused hyperactivity of PDE4D and reduced cAMP response element binding protein signaling in male mice, but not females.
• Male mice lacking CC2D1A exhibited spatial memory deficits, while females did not.
• Inhibiting PDE4D rescued cognitive deficits in males but had no effect in females.

Conclusions:

• CC2D1A regulates cAMP signaling and cognitive function in a male-specific manner in the hippocampus.
• Male-specific signaling mechanisms controlled by CC2D1A may contribute to sex bias in neurodevelopmental disorders.
• Targeting CC2D1A-regulated pathways could offer sex-specific therapeutic strategies.