Cerebrospinal fluid regulates skull bone marrow niches via direct access through dural channels
Jose A Mazzitelli, Leon C D Smyth, Kevin A Cross, Taitea Dykstra, Jerry Sun, Siling Du, Tornike Mamuladze, Igor Smirnov, Justin Rustenhoven, Jonathan Kipnis, Jose A Mazzitelli, Leon C D Smyth, Kevin A Cross, Taitea Dykstra, Jerry Sun, Siling Du, Tornike Mamuladze, Igor Smirnov, Justin Rustenhoven, Jonathan Kipnis
Abstract
It remains unclear how immune cells from skull bone marrow niches are recruited to the meninges. Here we report that cerebrospinal fluid (CSF) accesses skull bone marrow via dura-skull channels, and CSF proteins signal onto diverse cell types within the niches. After spinal cord injury, CSF-borne cues promote myelopoiesis and egress of myeloid cells into meninges. This reveals a mechanism of CNS-to-bone-marrow communication via CSF that regulates CNS immune responses.
Conflict of interest statement
Competing interests statement
J.K. is a scientific advisor, holds shares of, and has a licensing agreement with PureTech. The remaining authors declare no competing interests.
© 2022. The Author(s), under exclusive licence to Springer Nature America, Inc.
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