AQP4 and myeloid sarcoma: Nevertheless, both myelin and neuron/astrocyte-targeted MS rAbs cause myelin loss when applied to mouse spinal cord explant cultures in the presence of human complement [3], indicating that, similar to autoantibodies against aquaporin-4 (AQP4-IgG) in neuromyelitis optica (NMO) [2, 4, 28], intrathecal IgGs in MS may contribute to lesion pathogenesis.