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Increased activity of matrix metalloproteinase-2 in human glial and neuronal cell lines treated with HIV-1 gp41 peptides

Authors
  • Chong, Young Hae1
  • Seoh, Ju Young1
  • Park, Hae Kyung1
  • 1 Ewha Womans University, Department of Microbiology, College of Medicine, Division of Molecular Biology and Neuroscience, Medical Research Center, 911-1, Mok-6-dong, Yangcheonku, Seoul, 158-056, Korea , Seoul
Type
Published Article
Journal
Journal of Molecular Neuroscience
Publisher
Springer-Verlag
Publication Date
Apr 01, 1998
Volume
10
Issue
2
Pages
129–141
Identifiers
DOI: 10.1007/BF02737124
Source
Springer Nature
Keywords
License
Yellow

Abstract

Part of the neurodegenerative cascade in AIDS dementia may involve overexpression of matrix metalloproteinases (MMPs). Here, we examined the possible effect of HIV-1 gp41, which has been shown as a key determinant associated with pathogenesis of AIDS dementia, on the activity of MMPs using human neuronal and glial cell lines. Zymographic analysis revealed that treatment with the gp41 peptide (aa 583–599) for 24 h markedly elevated the activity of MMP with Mr 66 kDa in the cultured media of glioblastoma cell line T98G in a concentration-dependent manner as well as of neuroblastoma cell line SK-N-SH despite of lower magnitude of the activity. In contrast, the immediately adjacent gp41 peptide (aa 598–613) as well as the reverse peptide (aa 598–583) had a little effect. Recombinant gp41 protein containing extracellular domain also elicited a similar effect, although with a lesser extent. This 66 kDa MMP was confirmed as gelatinase A (MMP-2) based on the results of its activity dependent on Ca2+ and inhibited in the presence of 1,10-phenanthroline or EDTA, as well as its specific immunoreactivity on the Western blot.N-acetyl cysteine (NAC) downregulated this gp41 peptide-induced MMP-2 activity in T98G. The soluble form of amyloid precursor protein (sAPP), which is synthesized in theEscherichia coli system, also inhibited the MMP-2 activity in vitro. Taken together, these results implicate that high production of HIV-1 gp41 or its metabolites containing aa 583–599 within central nervous system (CNS) could result in the increased activity of MMP-2 and that the extracellular deficiency of reducing agent or decreased level of sAPP within CNS could exacerbate this gp41-induced MMP-2 activity.

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