IL-17 induced NOTCH1 activation in oligodendrocyte progenitor cells enhances proliferation and inflammatory gene expression.

NOTCH signalling stimulates oligodendrocyte progenitor cell proliferation but how this regulates demyelinating disease is unclear. Here, the authors show that an IL-17 adaptor protein, Act1, interacts with the C-terminal fragment of NOTCH1 (NICD) to activate cell proliferation and an inflammatory response.