Blocking an immune system molecule in mice may help prevent long-term disabilities after traumatic brain injury Posted byJeanne Paz December 14, 2021 Leave a comment on Blocking an immune system molecule in mice may help prevent long-term disabilities after traumatic brain injury The molecule C1q has both protective and detrimental effects after traumatic brain injury. Blocking it after injury in mice restored normal brain rhythms during sleep and prevented epileptic spikes.