Growth-associated protein 43 in lesions and cerebrospinal fluid in multiple sclerosis.

Abstract:

:Axonal damage in multiple sclerosis (MS) is correlated to disease progression. Early axonal damage may be compensated for by regenerative processes. Growth-associated protein 43 (GAP-43) is a marker for axonal growth and synaptogenesis in various neurodegenerative diseases. We investigated the expression of GAP-43 in 48 MS grey and white matter lesions of different stages. Decreased GAP-43 expression was found in 74% of the white matter lesions, independent of the lesion stage. In 19 out of 35 white matter lesions, areas of increased GAP-43 expression were present immediately adjacent to the lesions. Increased or unaltered expression was observed in remyelinated lesions. GAP-43 was expressed in neurofilament-positive structures. GAP-43 expression appeared unchanged in grey matter lesions. Macrophages were present in the areas of changed GAP-43 expression. cerebrospinal fluid GAP-43 levels were negatively correlated with magnetic resonance imaging measures of whole-brain atrophy (r = -0.30). In conclusion, these results indicate that decreased GAP-43 immunopositivity reflects axonal damage in MS lesions, which may again be reflected in decreased cerebrospinal fluid levels. The increased levels of GAP-43 in remyelinated or nondemyelinated white matter close to MS lesions may reflect regenerative attempts by damaged axons.

authors

Teunissen CE,Dijkstra CD,Jasperse B,Barkhof F,Vanderstichele H,Vanmechelen E,Polman CH,Bö L

doi

10.1111/j.1365-2990.2006.00730.x

subject

Has Abstract

pub_date

2006-06-01 00:00:00

pages

318-31

issue

3

eissn

0305-1846

issn

1365-2990

pii

NAN730

journal_volume

32

pub_type

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