Chemokines and matrix metalloproteinase-9 in leukocyte recruitment to the central nervous system
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Published on: May 8, 2016
1Department of Neurology, The MS Clinic, University of Copenhagen, Glostrup Hospital, DK-2600 Glostrup, Denmark. sellebjerg@dadlnet.dk
Abstract:
Chemokines and matrix metalloproteinases (MMPs) play key roles in leukocyte migration across the blood-brain barrier (BBB) in infectious and inflammatory diseases, including multiple sclerosis (MS). In MS some chemokine receptors are expressed by an increased percentage of T cells in blood, the CSF concentration of chemokine ligands for these receptors is increased, and there is accumulation of T cells expressing relevant chemokine receptors in CSF and in the CNS parenchyma. Chemokine receptor expression patterns appear to reflect disease activity and disease stage in MS. MMPs are constitutively expressed or induced by proinflammatory cytokines and chemokines in leukocytes and CNS-resident cells. Several MMPs are expressed in MS plaques, and the CSF concentration of MMP-9 is increased in MS. The CSF concentration of MMP-9 may reflect disease activity in MS, and the CSF concentration of MMP-9 is higher in patients carrying the MS-associated HLA type DRB1 1501. We review how chemokines and MMP-9 may be involved in the pathogenesis of MS by controlling leukocyte migration between different functional compartments. Measuring expression of these molecules may find use as surrogate markers of disease activity in MS, and interfering with their function holds promise as a novel therapeutic strategy in MS.
Insights
Chemokines and matrix metalloproteinases (MMPs) are crucial for T cell migration in multiple sclerosis (MS). Their levels in cerebrospinal fluid may indicate disease activity and serve as therapeutic targets.
Area of Science:
- Neuroimmunology
- Molecular Biology
Background:
- Chemokines and matrix metalloproteinases (MMPs) are implicated in leukocyte migration across the blood-brain barrier (BBB) in inflammatory diseases like multiple sclerosis (MS).
- In MS, altered chemokine receptor expression on T cells and elevated chemokine ligands in cerebrospinal fluid (CSF) correlate with disease progression and CNS infiltration.
Purpose of the Study:
- To review the roles of chemokines and MMP-9 in the pathogenesis of MS.
- To explore the potential of these molecules as biomarkers and therapeutic targets in MS.
Main Methods:
- Review of existing literature on chemokines, MMPs, and their involvement in MS pathogenesis.
- Analysis of chemokine receptor expression patterns in MS patients.
- Measurement of MMP-9 concentrations in CSF and correlation with disease parameters.
Main Results:
- Chemokine receptor expression on T cells and CSF chemokine ligand levels reflect MS disease activity and stage.
- MMP-9 is present in MS plaques, and its CSF concentration is elevated in MS, potentially indicating disease activity.
- Elevated CSF MMP-9 levels are associated with the MS-associated HLA type DRB1 1501.
Conclusions:
- Chemokines and MMP-9 significantly contribute to MS pathogenesis by regulating leukocyte migration.
- Measuring chemokine and MMP-9 expression may serve as surrogate markers for MS disease activity.
- Targeting chemokine and MMP-9 pathways offers a promising therapeutic strategy for MS.
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