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P2X7 receptor (P2X7R) immunoreactivity is increased with astrogliosis in white matter (WM) of secondary progressive multiple sclerosis (SPMS) frontal cortex parenchyma. Immunohistochemistry analysis of two adjacent WM fields from SPMS frontal cortex characterized, respectively, by hypertrophic astrocytes (B) and glial scar (C) reveals a noteworthy increase in P2X7R-positive astrocytes (B,C), compared with control case (A).
