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Matrix metalloproteinases are associated with increased blood-brain barrier opening in vascular cognitive impairment

Eduardo Candelario-Jalil1, Jeffrey Thompson, Saeid Taheri

  • 1Department of Neurology, MSC 10 5620, 1 University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA.

Stroke
|April 2, 2011
PubMed
Abstract

Insights

Matrix metalloproteinases (MMPs) are linked to subcortical ischemic vascular disease (SIVD) and increased cerebrospinal fluid (CSF) albumin. Elevated MMP-3 activity and specific MMP-2 levels may help diagnose SIVD.

Area of Science:

  • Neurology
  • Neuroscience
  • Biochemistry

Background:

  • Subcortical ischemic vascular disease (SIVD) is a primary cause of vascular cognitive impairment (VCI).
  • Matrix metalloproteinases (MMPs) are implicated in blood-brain barrier disruption and myelin degradation during neuroinflammation.
  • Elevated MMP levels are observed in the brain and CSF of VCI patients.

Purpose of the Study:

  • To investigate the association between MMPs in CSF and SIVD.
  • To determine if MMP levels correlate with CSF albumin in SIVD patients.

Main Methods:

  • Studied 60 patients with suspected VCI, classifying 25 as SIVD.
  • Measured MMP-2 and MMP-9 in CSF and plasma using gel zymography, indexed to albumin.
  • Assessed MMP-3 activity via fluorescent assay.

Main Results:

  • A reduced MMP-2 index in CSF was observed across VCI patient groups compared to controls.
  • MMP-3 activity was significantly increased in VCI patients.
  • In SIVD, the MMP-2 index negatively correlated with the albumin index.
  • Combined MMP-2 index and MMP-3 activity distinguished SIVD patients from controls with high specificity.

Conclusions:

  • MMPs are associated with increased CSF albumin, supporting their role in SIVD pathophysiology.
  • Specific MMP profiles may serve as biomarkers for SIVD.

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