Jin JK, Na YJ, Song JH, Joo HG, Kim S, Kim JI, Choi EK, Carp RI, Kim YS, Shin T
Galectin-3 expression is correlated with abnormal prion protein accumulation in murine scrapie. [JOURNAL ARTICLE]
Neurosci Lett 2007 May 6.
To investigate the involvement of galectin-3 in the process of neurodegeneration in prion diseases, the expression and cellular localization of galectin-3 in the brain were studied in scrapie, a mouse model of prion disease. Reverse transcription-polymerase chain reaction (RT-PCR) and Western blot analyses showed that the expression of galectin-3 protein and mRNA was induced in scrapie-affected brains, particularly at the time when the abnormal prion protein PrP(Sc) began to accumulate in the brains. Immunohistochemically, immunostaining for galectin-3 was found mainly in B4-isolectin-positive cells (presumably activated microglia/macrophages), but not in astrocytes. Galectin-3 immunoreactivity was localized mainly in areas of PrP(Sc) accumulation and neuronal death in scrapie-infected brains. These findings suggest that the expression of galectin-3 by activated microglia/macrophages in prion disease correlates with abnormal prion protein accumulation.
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