CD14 and amyotrophic lateral sclerosis: Based on the microglia transplantation approaches described (Table 2), it is appealing to hypothesize that bone marrow or hematopoietic cells could be modified ex vivo to express factors important for modulating an inflammatory response (such as IL-4, IGF-1, BDNF, GDNF) and/or blocking TLR/CD14 and then transplanted into ALS patients, taking advantage of the cells ability to migrate in the CNS (Fig. 3).