Molecular and Cellular Biochemistry

, Volume 270, Issue 1–2, pp 125–130 | Cite as

Antimicrobial effects of antioxidants with and without clarithromycin on Helicobacter pylori

  • Archana Chatterjee
  • Debasis Bagchi
  • Taharat Yasmin
  • Sidney J. Stohs


Increasing resistance to currently used antimicrobials has resulted in the evaluation of other agents that have antimicrobial activity against Helicobacter pylori. H. pylori American Type Culture Collection (ATCC) strain 49503 (a toxin-producing strain known to be associated with gastric cancer) was grown, a cell suspension prepared in 2 mL PBS and diluted 10-fold. One hundred μL of this cell suspension was added to vitamin C 0.5%, vitamin E 0.5%, garcinol 100 μg/mL, Protykin® (containing 50% rans-resveratrol) 100 μg/mL and garcinol + Protykin® 100 μg/mL in Lennox broth, and incubated for 16 h under microaerophilic conditions. Three replicates of 10 μL from each 10−7 dilution tube were plated, colonies were counted after 16 h, and growth of H. pylori was confirmed by the CLO® test. These colony counts were compared to control cultures without the addition of any antioxidants. The experiments were then repeated with the addition of 15 μg/mL of clarithromycin to experimental and control samples. Enhanced killing of H. pylori by 37.6% was noted when vitamin C was added, which increased to 66% when clarithromycin was added, compared to controls (p < 0.05). With garcinol and Protykin® alone there was 91.4 and 87% killing of H. pylori, respectively, while a combination of garcinol + Protykin® resulted in 90.8% killing compared to controls (p < 0.05). When clarithromycin was added, there was 76.3% increased killing with garcinol alone, 55.3% with Protykin® alone, and 73.7% with garcinol + Protykin® compared to controls (containing clarithromycin) (p < 0.05). Vitamin E had no effect on H. pylori growth compared to controls. We conclude from this study that some antioxidants such as vitamin C, garcinol and Protykin®, but not vitamin E, may have potential as antimicrobial agents against H. pylori. (Mol Cell Biochem 270: 125–130, 2005)

Key words

antioxidants clarithromycin Helicobacter pylori 


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Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  • Archana Chatterjee
    • 1
    • 2
    • 3
  • Debasis Bagchi
    • 2
  • Taharat Yasmin
    • 2
  • Sidney J. Stohs
    • 2
  1. 1.Department of Pediatrics, Division of Pediatric Infectious DiseasesCreighton University Medical CenterOmahaUSA
  2. 2.Department of Pharmacy SciencesCreighton University Medical CenterOmahaUSA
  3. 3.Department of PediatricsCreighton University Health Science CenterOmahaUSA

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