Scavenger effect of sulfasalazine, 5-aminosalicylic acid, and olsalazine on superoxide radical generation (original) (raw)

Abstract

The_in vitro_ antioxidant capacity of sulfasalazine (SASP), its metabolites (SP, 5-SSA), and olsalazine (OAZ), was studied by evaluating their effects on superoxide (O2 − •) production. Assay systems were the xanthine-xanthine oxidase (X/XOD) reaction and phorbol myristate acetate (PMA)-activated polymorphonuclear leukocytes (PMNs), using the cytochrome_c_ (cyt-c) reduction assay and a luminol-dependent chemiluminescence method. 5-ASA, SASP, and OAZ showed a dose-dependent scavenger effect in both O2 − • generating systems, 5-ASA being the most powerful (>50% of inhibition in the PMNs system and >70% in the X/XOD system at 10 μM concentration). SP had an inhibitory effect only in the PMNs system but did not modify the activity of xanthine oxidase, thus excluding a scavenger action. These data suggest that the scavenger effect of 5-ASA, SASP, and OAZ may be an important mechanism of action.

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Authors and Affiliations

  1. Istituto di Clinica Medica e Gastroenterologia, Dipartimento di Biochimica, Università di Bologna, Policlinico S. Orsola, Via Massarenti 9, 40138, Bologna, Italy
    P. Gionchetti MD, C. Guarnieri MD, M. Campieri MD, A. Belluzzi MD, C. Brignola MD, P. Iannone MD, M. Miglioli MD & L. Barbara MD

Authors

  1. P. Gionchetti MD
  2. C. Guarnieri MD
  3. M. Campieri MD
  4. A. Belluzzi MD
  5. C. Brignola MD
  6. P. Iannone MD
  7. M. Miglioli MD
  8. L. Barbara MD

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Gionchetti, P., Guarnieri, C., Campieri, M. et al. Scavenger effect of sulfasalazine, 5-aminosalicylic acid, and olsalazine on superoxide radical generation.Digest Dis Sci 36, 174–178 (1991). https://doi.org/10.1007/BF01300752

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