Alterations in KIDINS220/ARMS Expression Impact Sensory Processing and Social Behavior in Adult Mice

Area of Science:

• Neuroscience
• Genetics
• Developmental Biology

Background:

• Kidins220 (Kinase D-interacting substrate of 220 kDa) is vital for neural functions like survival, maturation, and plasticity.
• Mutations in the KIDINS220 gene cause SINO syndrome, a neurodevelopmental disorder featuring spastic paraplegia, intellectual disability, and autism spectrum disorder.

Purpose of the Study:

• To investigate the functional consequences of reduced Kidins220 expression on sensory processing and social behavior in mouse models.
• To elucidate the pathophysiology of KIDINS220-linked neurodevelopmental disorders.

Main Methods:

• Assessment of sensory processing (auditory, olfactory) and social behavior in two transgenic mouse lines with reduced Kidins220 levels: CaMKII-driven conditional knockout (cKO) and Kidins220floxed.
• Analysis of startle response, pre-pulse inhibition, social odor recognition, social memory, and aggressive behavior.

Main Results:

• Both transgenic lines exhibited impaired responses to auditory and olfactory stimuli.
• Reduced Kidins220 expression led to an impaired startle response to loud sounds and significantly reduced social odor recognition.
• The Kidins220floxed line showed deficits in social memory and increased aggression, linked to olfactory alterations.

Conclusions:

• Altered Kidins220 expression and splicing patterns significantly impact sensory processing and social behaviors.
• Findings contribute to understanding SINO syndrome pathophysiology and suggest sensory processing deficits as key features.
• Understanding these sensory deviations is crucial for developing future therapeutic strategies for SINO syndrome.