Molecular and Cellular Biochemistry

, Volume 304, Issue 1–2, pp 13–23 | Cite as

UDN glycoprotein inhibits activator protein-1 and matrix metalloproteinase-9 via blocking of oxygen radicals in HT-29 cells

  • Sei-Jung Lee
  • Kye-Taek Lim


The present study was performed to investigate the anti-inflammatory potential of a 116-kDa glycoprotein isolated from Ulmus davidiana Nakai (UDN glycoprotein) in lipopolysaccaride (LPS)-treated cancerous human colon epithelial cells (HT-29 cells). UDN glycoprotein inhibited the production of intracellular superoxide anion (O 2 ·− ), hydrogen peroxides (H2O2), and nitric oxide (NO), whereas normalized the activity of anti-oxidant enzymes [superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPX)], accompanying the inhibition of manganese-superoxide dismutases (Mn-SOD) activity in LPS-treated HT-29 cells. In addition, UDN glycoprotein blocked the DNA binding activity of activator protein-1 (AP-1) through suppression of c-Jun and c-Fos activities, respectively. We also evaluated the anti-inflammatory potential of UDN glycoprotein based on the activity of the pro-inflammatory signal mediators [inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), and matrix metalloproteinases-9 (MMP-9)]. The results showed that UDN glycoprotein (200 μg/ml) has an inhibitory effect on the activation of iNOS, COX-2, and MMP-9 proteins in the LPS-treated HT-29 cells. From these results, we suggest that UDN glycoprotein is one of the potential anti-inflammatory agents that blocks LPS-mediated inflammatory signal pathway in HT-29 cells. Here, we speculate that UDN glycoprotein could be used as an antioxidative agent for inflammatory gastrointestinal cancers.


UDN glycoprotein Manganese-superoxide dismutases Activator protein-1 Matrix metalloproteinases-9 HT-29 cells 



This work was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (KRF-2005-041-F00082).


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Molecular Biochemistry Laboratory, Biotechnology Research Institute and Center for the Control of Animal Hazards Using Biotechnology (BK 21)Chonnam National UniversityKwang-juSouth Korea
  2. 2.Molecular Biochemistry Laboratory, Institute of BiotechnologyChonnam National UniversityKwang-juSouth Korea

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