showed a trendP = 0.0814
4 B, GSK-3β phosphorylation at serine-9 decreased significantly in MAG1-high mice (t (8) = 3.141, P = 0.0138), while GSK-3α phosphorylation at serine 21 showed a trend toward decrease (t (8) = 1.993, P = 0.0814). 3.5 Elevated cerebellar expression of MMP-9, especially in the purkinje cells Since increased MMP-9 levels were only found in the MAG1-high mice, we immunostained brain sections of this group with anti-MMP-9 antibodies.