CCR2 and amyotrophic lateral sclerosis: To clarify the effects of CCR2 deletion upon mSOD1-ALS, SOD1G93A/CCR2RFP/WT mice (CCR2-positive SOD1G93A mice, n = 24) and SOD1G93A/CCR2RFP/RFP mice (CCR2-deficient SOD1G93A mice, n = 18) were compared by measuring body weights, rotarod test, grip strength, and ALS-Therapy Development Institute (TDI) scores.