Figure 5 A. Representative inward current traces elicited by 10μM AMPA in human oligodendrocyte MO3.13 progenitor cells in the absence or in the presence of 10μM DNQX. The concentration-dependent curve of AMPA (1-100 μM) on inward currents is showed at the bottom of panel A Data information: The values represent the mean ± S.E.M from 3 independent experimental sessions. Level of significance was determined by using: in A, one-way ANOVA P<0.001 followed by Bonferroni post hoc test, *P< 0.05 versus 1μM AMPA, n=3 biological replicate  B. Representative inward current traces elicited by 100μM D-Asp application in MO3.13 cells in the absence or in the presence of 10μM DNQX  C. Representative traces of the inward current (upper panel) and the corresponding quantification (bottom panel) observed in human oligodendrocyte MO3.13 progenitors after: (I) the first application of 10μM AMPA alone; (II) the second application of 10μM AMPA alone; (III) the third application of 10μM AMPA in the presence of 10μM DNQX; (IV) the fourth application of 10μM AMPA alone. Data are expressed as percentage of control Data information: The values represent the mean ± S.E.M from 3 independent experimental sessions. Level of significance was determined by usin i one-way ANOVA P<0.001 followed by Bonferroni post hoc test, *P< 0.05 versus versus AMPA(I). Data are reported as mean of at least 25 cells in each group, n=3 biological replicate  D. Representative traces of the inward current (upper panel) and the corresponding quantification (bottom panel) observed in human oligodendrocyte MO3.13 progenitors after: (I) the first application of 100μM D-Asp alone; (II) the second application of 100μM D-Asp alone; (III) the third application of 100μM D-Asp in presence of 10μM DNQX; (IV) the fourth application of 100μM D-Asp alone. Data are expressed as percentage of control Data information: The values represent the mean ± S.E.M from 3 independent experimental sessions. Level of significance was determined by using: i one-way ANOVA P<0.001 followed by Bonferroni post hoc test, *P< 0.05 versus D-Asp (I). Data are reported as mean of at least 25 cells for each group, n=3 biological replicates  E. Representative inward current traces elicited by 10μM AMPA in rat primary OPC in the absence or in the presence of 10μM DNQX  F, Representative inward current traces elicited by 100μM D-Asp in rat primary OPC in the absence or in presence of 10μM DNQX or 10μM DNQX + 20μM PDC  G. Representative traces of the inward current (upper panel) and the corresponding quantification (lower panel) observed in rat primary OPC after: (I) the first application of 10μM AMPA alone; (II) the second application of 10μM AMPA alone; (III) the third application of 10μM AMPA in the presence of 10μM DNQX; (IV) the fourth application of 10μM AMPA alone. Data are expressed as percentage of control Data information: The values represent the mean ± S.E.M from 3 independent experimental sessions. Level of significance was determined by using: i G, one-way ANOVA P<0.001 followed by Bonferroni post hoc test, *P< 0.05 versus versus AMPA(I). Data are reported as mean of at least 25 cells in each group, n=3 biological replicate  H, Representative traces of the inward current (upper panel) and the corresponding quantification (lower panel) observed in rat primary OPC after: (I) the first application of 100μM D-Asp alone; (II) the second application of 100μM D-Asp alone; (III) the third application of 100μM D-Asp in presence of 10μM DNQX; (IV) the fourth application of 100μM D-Asp in presence of 10μM DNQX + 10μM MK801; (V) the fifth application of 100μM D-Asp in presence of 10μM DNQX + 10μM MK-801+ 20μM PDC; (VI) the sixth application of 100μM D-Asp alone. Data are expressed as percentage of control Data information: The values represent the mean ± S.E.M from 3 independent experimental sessions. Level of significance was determined by using: i H, one-way ANOVA P<0.001 followed by Bonferroni post hoc test, *P< 0.05 versus D-Asp (I). Data are reported as mean of at least 25 cells for each group, n=3 biological replicates