Figure 2.
Saturation analysis for system XAG and xc- glutamate uptake in glial and neuronal preparations from striatum of gp120 and wild-type (WT) mice. These glial (i.e., glial plasmalemmal vesicles; GPV) and neuronal (i.e., synaptosomes; SYN) preparations are enriched in small vesicles pinched off from glial membranes and nerve endings, respectively. Analysis revealed a significant (p<0.05) reduction in the Vmax of systems XAG and xc- in both (A) GPV and (B) SYN fractions from gp120 mice compared to WT. There were no significant group differences in the Km (affinity) for XAG or xc- glutamate uptake in GPV and SYN. Data are expressed as mean ± SEM (n=4/preparation/group).