Publication

Increased expression of distinct galectins in multiple sclerosis lesions

Stancic, M., van Horssen, J., Thijssen, V. L., Gabius, H. -J., van der Valk, P., Hoekstra, D. & Baron, W., Oct-2011, In : Neuropathology and Applied Neurobiology. 37, 6, p. 654-671 18 p.

Research output: Contribution to journalArticleAcademicpeer-review

Aims: Multiple sclerosis (MS) is a chronic progressive degenerative disorder of the central nervous system, characterized by inflammation, demyelination, ultimate failure of remyelination and axonal loss. Current research identifies galectins, adhesion/growth-regulatory effectors binding beta-galactosides, peptide motifs and lipids, as important immunomodulators in diverse inflammatory diseases. However, little is known about their expression, cellular localization and role in human central nervous system tissue. To identify a potential role of galectins in MS, their expression and localization in control white matter (CWM) and demyelinated MS lesions were examined. Methods: qPCR, Western blot and immunohistochemical analyses were performed on human post mortem CWM and MS lesions at different stages. Cultured astrocytes, derived from healthy subjects and MS patients, were analysed similarly. Results: Among 11 different galectins tested, galectins-1, -3, -8 and -9 were present at detectable levels in CWM, and, interestingly, significantly enhanced in active MS lesions. On the cellular level, galectins localized to microglia/macrophages, astrocytes and endothelial cells. Intriguingly, galectin-9 displayed a distinctly different intracellular localization in microglia/macrophages when comparing active and inactive MS lesions, being restricted to the nuclei in active lesions, and primarily localizing in the cytoplasm in inactive lesions. Furthermore, enhanced levels of galectin-1, detected as dimers in Western blot analysis, were released by cultured astrocytes from MS patients. Conclusions: This study provides a detailed analysis of galectins in MS lesions and assigns distinct galectins to different aspects of the disease. Thus, besides being known as modulators of inflammatory processes, our findings suggest additional association of distinct galectins with MS pathology.

Original languageEnglish
Pages (from-to)654-671
Number of pages18
JournalNeuropathology and Applied Neurobiology
Volume37
Issue number6
Publication statusPublished - Oct-2011

    Keywords

  • astrocytes, brain, galectin, microglia, multiple sclerosis, EXPERIMENTAL AUTOIMMUNE ENCEPHALOMYELITIS, ADHESION/GROWTH-REGULATORY LECTINS, TUMOR-CELL LINES, GLYCAN INTERACTIONS, BRAIN-LESIONS, T-CELLS, BINDING, REMYELINATION, LOCALIZATION, INFLAMMATION

ID: 5399187