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Molecular and Cellular Biochemistry

, Volume 165, Issue 1, pp 55–63 | Cite as

Inhibition of rat parotid gland growth response induced by chronic isoproterenol following treatment with quinolone antibiotics

  • Barna Kelentey
  • Micah Kerr
  • Zeng Tao
  • Kamam R. Purushotham
  • Michael G. Humphreys-Beher
  • Tivadar Zelles
Article

Abstract

While antibiotics are broadly used in dental and medical therapy, little attention has been directed towards the potential toxic side effects of antibiotics on tissue regeneration. Here we examined the effect of a quinolone antibiotic, pefloxacin (Rhone Poulenc) on rat parotid gland responses to chronic isoproterenol treatment. Groups of rats received injections of isoproterenol to induce glandular growth, saline (controls), pefloxacin, or isoproterenol and pefloxacin in combination. Parotid gland weight decreased significantly after pefloxacin treatment for 7 days as well as inhibiting glandular enlargement provoked by isoproterenol. The same trend was observed for the rates of DNA synthesis, with the incorporation of [3H]-thymidine in isoproterenol/pefloxacin-treated rats reduced to 49% of isoproterenol treatment alone levels. Saline-treated animals were 42% of the rate of [3H]-thymidine incorporation into DNA observed in isoproterenol treated rats. While isoproterenol treatment increased steady-state mRNA levels for fos, jun, myc, src, c-erbB-2, ras and topo II, inclusion of pefloxacin with the isoproterenol regimen blocked these increases. Pefloxacin treatment by itself did not alter proto-oncogene mRNA levels in the parotid gland. Glandular amylase activity was decreased in the pefloxacin treated group, while the combination of isoproterenol with pefloxacin did not decrease glandular amylase levels to the extent of that observed with β-agonist treatment alone. In acute experiments, pefloxacin significantly decreased the volume of saliva secreted by the parotid gland. These results suggest that quinolone-based antibiotics disturb the secretory function of the parotid gland and can inhibit cell proliferation and regeneration. (Mol Cell Biochem 165: 55–63, 1996)

Key words

antibiotics cell proliferation salivary glands secretion 

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • Barna Kelentey
    • 1
  • Micah Kerr
    • 2
  • Zeng Tao
    • 2
  • Kamam R. Purushotham
    • 2
  • Michael G. Humphreys-Beher
    • 2
    • 3
  • Tivadar Zelles
    • 4
  1. 1.Clinic of StomatologyUniversity of DebrecenDebrecenHungary
  2. 2.Department of Oral BiologyUniversity of Florida Health Science CenterGainesvilleUSA
  3. 3.Department of Pharmacology and TherapeuticsUniversity of Florida Health Science CenterGainesvilleUSA
  4. 4.Department of Oral BiologySernmelweis University Medical SchoolBudapestHungary

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