Table 4.

Summary of IBA-1 staining

	WT (6–8 mo)	Gaa−/− (6–8 mo)	WT (12–15 mo)	Gaa−/− (12–15 mo)
Dorsal horn	0/4	3/3*	0/4	4/4*
Intermediate gray	0/4	2/3	0/4	4/4*
Ventral jorn	0/4	2/3	0/4	4/4*

The table depicts the proportion of Gaa^−/−and WT mice showing positive staining in the region examined (e.g., 0/4 indicates that 0 of 4 mice examined showed positive staining). Robust cervical spinal ionized calcium binding adaptor molecule (IBA-1) staining was observed in more Gaa^−/− than WT tissues. The proportion of animals showing positive staining in Gaa^−/−vs. WT mice was examined bya Fischer's exact test;

^*indicates P < 0.05.