A synthetic NCAM―derived mimetic peptide, FGL, exerts anti― inflammatory properties via IGF―1 and interferon―γ modulation
In: Journal of neurochemistry, Jg. 109 (2009), Heft 5, S. 1516-1525
Online
academicJournal
- print; 10; 1 p.3/4
Zugriff:
Microglial cell activity increases in the rat hippocampus during normal brain aging. The neural cell adhesion molecule (NCAM)-derived mimetic peptide, FG loop (FGL), acts as an anti-inflammatory agent in the hippocampus of the aged rat, promoting CD200 ligand expression while attenuating glial cell activation and subsequent pro-inflammatory cytokine production. The aim of the current study was to determine if FGL corrects the age-related imbalance in hippocampal levels of insulin-like growth factor-1 (IGF-1) and pro-inflammatory interferon-γ (IFNγ), and subsequently attenuates the glial reactivity associated with aging. Administration of FGL reversed the age-related decline in IGF-1 in hippocampus, while abrogating the age-related increase in IFNγ. FGL robustly promotes IGF-1 release from primary neurons and IGF-1 is pivotal in FGL induction of neuronal Akt phosphorylation and subsequent CD200 ligand expression in vitro. In addition, FGL abrogates both age- and IFNγ-induced increases in markers of glial cell activation, including major histocompatibility complex class II (MHCII) and CD40. Finally, the proclivity of FGL to attenuate IFNγ-induced glial cell activation in vitro is IGF-1-dependent. Overall, these findings suggest that FGL, by correcting the age-related imbalance in hippocampal levels of IGF-1 and IFNγ, attenuates glial cell activation associated with aging. These findings also highlight a novel mechanism by which FGL can impact on neuronal CD200 ligand expression and subsequently on glial cell activation status.
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A synthetic NCAM―derived mimetic peptide, FGL, exerts anti― inflammatory properties via IGF―1 and interferon―γ modulation
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Autor/in / Beteiligte Person: | DOWNER, Eric J ; COWLEY, Thelma R ; COX, Fionnuala ; MAHER, Francis O ; BEREZIN, Vladimir ; BOCK, Elisabeth ; LYNCH, Marina A |
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Zeitschrift: | Journal of neurochemistry, Jg. 109 (2009), Heft 5, S. 1516-1525 |
Veröffentlichung: | Oxford: Wiley-Blackwell, 2009 |
Medientyp: | academicJournal |
Umfang: | print; 10; 1 p.3/4 |
ISSN: | 0022-3042 (print) |
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