New Genetic Mutation Found to Influence Sleep Duration
The amount of sleep needed each night varies from person to person, influenced by a variety of factors. A recent discovery sheds light on a rare genetic mutation in the SIK3 gene that allows individuals to function on less sleep than usual.
Researchers from the Chinese Academy of Sciences identified this mutation in a healthy woman in her 70s who slept an average of 6.3 hours per night. The study aimed to pinpoint individuals with a natural short sleeper (NSS) profile.
This genetic mutation, the fifth of its kind to be identified, underscores the significant role genetics play in determining sleep patterns and overall sleep health.
The researchers noted that studying human sleep genes not only expands our understanding of the sleep regulatory network but also bridges the gap between basic research in animal models and clinical applications.
Mice engineered with the same genetic mutation exhibited reduced sleep duration, indicating the role of the SIK3 gene in regulating sleep patterns. Brain scans of these mice revealed increased activity in proteins produced by the mutated gene, affecting synaptic connections between neurons.
The kinase protein produced by SIK3 plays a crucial role in sending signals to modify the function of other proteins, which appears to influence the duration of sleep needed for optimal functioning.
Further research is needed to explore potential therapeutic strategies for sleep disorders based on these findings. Understanding genetic mutations like this provides insights into the essential functions performed by the brain during sleep, such as maintaining the immune system, cognitive abilities, and memory consolidation.
Neuroscientist and geneticist Ying-Hui Fu from the University of California, San Francisco, highlighted the superior performance of NSS individuals in various bodily functions during sleep compared to the general population.
The study has been published in PNAS.
