Human SOD1G93A protein was aggregated, and GFAP protein was increased during ALS progression. Aggregation of human-SOD1G93A protein was observed in the lumbar spine white matter (a) and gray matter (b) starting in 2-month-old SOD1G93A mice in immunofluorescence staining, immunohistochemistry staining and human-SOD1 protein aggregates percentage analysis. Images are from a single experiment, representative of 6 mice per group. (Data are expressed as mean ± SD. n = 6, one-way ANOVA test, *P < .05, **P < .01, ***P < .001). GFAP expression was enhanced starting from 2-month-old in the lumbar spine white matter (c) and gray matter (d) in the SOD1G93A mice in immunofluorescence staining, immunohistochemistry staining and GFAP staining quantification. Images are from a single experiment, representative of 6 mice per group. (Data are expressed as mean ± SD. n = 6, one-way ANOVA test, *P < .05, **P < .01, ***P < .001)