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Neurofibromin 1 regulates early developmental sleep in Drosophila
Jaclyn Durkin1, Amy R Poe1, Samuel J Belfer2
1Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.
Insights
Neurofibromin 1 (Nf1) regulates sleep from larval stages through adulthood in flies. This gene is crucial in neurons and requires Alk pathway signaling for its sleep-regulating function.
Area of Science:
- Neuroscience
- Developmental Biology
- Genetics
Background:
- Sleep disturbances are prevalent in neurodevelopmental disorders.
- Juvenile sleep has unique functions and regulatory mechanisms compared to adult sleep.
- Few genes regulating adult sleep also affect sleep in early developmental stages.
Purpose of the Study:
- To investigate the role of the neurodevelopmental disorder-associated gene Neurofibromin 1 (Nf1) in sleep across different developmental periods.
- To determine if Nf1's sleep regulatory function extends to early life stages.
- To identify the cellular requirements for Nf1's role in sleep regulation.
Main Methods:
- Utilized *Drosophila melanogaster* (fruit fly) as a model organism.
- Examined sleep phenotypes across various developmental stages (larval, adult).
- Investigated the requirement of Nf1 in neurons and its interaction with the Alk signaling pathway.
Main Results:
- Neurofibromin 1 (Nf1) regulates sleep throughout the lifespan of *Drosophila*, starting from the larval stage.
- Nf1's function in sleep regulation is dependent on its expression in neurons.
- Alk pathway signaling is necessary for Nf1-mediated sleep regulation.
Conclusions:
- Neurofibromin 1 (Nf1) is one of the few identified genes that regulate sleep across multiple developmental periods, including early life.
- These findings highlight Nf1 as a key molecular factor in the developmental regulation of sleep.
- Understanding Nf1's role provides insights into sleep and circadian disorders associated with neurodevelopmental conditions.
Abstract:
Sleep disturbances are common in neurodevelopmental disorders, but knowledge of molecular factors that govern sleep in young animals is lacking. Evidence across species, including Drosophila, suggests that juvenile sleep has distinct functions and regulatory mechanisms in comparison to sleep in maturity. In flies, manipulation of most known adult sleep regulatory genes is not associated with sleep phenotypes during early developmental (larval) stages. Here, we examine the role of the neurodevelopmental disorder-associated gene Neurofibromin 1 (Nf1) in sleep during numerous developmental periods. Mutations in Neurofibromin 1 (Nf1) are associated with sleep and circadian disorders in humans and adult flies. We find in flies that Nf1 acts to regulate sleep across the lifespan, beginning during larval stages. Nf1 is required in neurons for this function, as is signaling via the Alk pathway. These findings identify Nf1 as one of a small number of genes positioned to regulate sleep across developmental periods.
