Affiliation:
1. Laboratory of Genetics, The Rockefeller University, New York, NY 10065
2. Strang Laboratory of Apoptosis and Cancer Biology, The Rockefeller University, New York, NY 10065
Abstract
Sleep is vital for most animals, yet its mechanism and function remain unclear. We found that permeability of the BBB (blood–brain barrier)—the organ required for the maintenance of homeostatic levels of nutrients, ions, and other molecules in the brain—is modulated by sleep deprivation (SD) and can cell-autonomously effect sleep changes. We observed increased BBB permeability in known sleep mutants as well as in acutely sleep-deprived animals. In addition to molecular tracers, SD–induced BBB changes also increased the penetration of drugs used in the treatment of brain pathologies. After chronic/genetic or acute SD, rebound sleep or administration of the sleeping aid gaboxadol normalized BBB permeability, showing that SD effects on the BBB are reversible. Along with BBB permeability, RNA levels of the BBB master regulator
moody
are modulated by sleep. Conversely, altering BBB permeability alone through glia-specific modulation of
moody, gαo, loco, lachesin
, or
neuroglian
—each a well-studied regulator of BBB function—was sufficient to induce robust sleep phenotypes. These studies demonstrate a tight link between BBB permeability and sleep and indicate a unique role for the BBB in the regulation of sleep.
Funder
HHS | NIH | National Institute of Neurological Disorders and Stroke
HHS | NIH | National Institute of General Medical Sciences
Publisher
Proceedings of the National Academy of Sciences