The number of GFAP-positive cells in spinal cord does not differ between mSOD1/RAG2+/+ and mSOD1/RAG2-/- mice. (A) Lumbar sections of spinal cord from mSOD1/RAG2-/- mice and control mice stained with anti-GFAP antibody. Scale bar = 50 μm. (B) The number of GFAP-positive astrocytes in lumbar cord of mSOD1/RAG2-/- mice does not significantly differ from that of control mSOD1 mice at early (70-90 days of age) and end (130-150 days of age) stages. Data presented in A-B is representative of three animals.