GFAP and Alzheimer disease: A sub-population of sPLA2-IIA-positive astrocytes co-localized with thioflavin S-positive plaques in AD patients as demonstrated in the same brain sections that were processed for double immunohistochemistry for GFAP and sPLA2-IIA antibodies (Fig. 2B) and for thioflavin S histochemistry (Fig. 2A).