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Effects of omeprazole and gentamicin on the biochemical and histopathological alterations of the hypoxia/ reoxygenation induced intestinal injury in newborn rats

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Abstract

We utilized a newborn rat model of hypoxia/reoxygenation (H/R) that resembles human necrotizing enterocolitis (NEC) to investigate the effects of omeprazole and/or gentamicin on the formation of free oxygen radicals (FOR) and bowel histopathology. For H/R, 1-day-old rats were placed into a chamber of 100% CO2 for 5 min, then they were reoxygenized for the next 5 min. The rats (n=70) were divided into seven groups: group 1 (control), group 2 (H/R), group 3 (omeprazole), group 4 (H/R+omeprazole), group 5 (gentamicin), group 6 (H/R+gentamicin), group 7 (H/R+omeprazole+gentamicin). Gentamicin and/or omeprazole were given orally for 3 days, then all animals were killed; bowel specimens were harvested. Histopathologic injury scores (HIS) and malonyldialdehyde (MDA) and XO/(XO+XDH) rates (XO; xanthine oxidase, XDH; xanthine dehydrogenase) were measured, which reflect the FOR levels. In group 2, the HIS was significantly higher than groups 4 and 6. The mean MDA values in groups 1–7 were as follows: 54.16, 104.2, 56.85, 63.43, 62.31, 76.85, 79.13, respectively. The mean XO/(XO+XDH) levels were 0.306, 0.461, 0.286, 0.335, 0.323, 0.410, 0.375 from groups 1 –7, respectively. Group 2 rats had significantly more MDA and XO/(XO+XDH) rates versus other groups (P<001). Histopathologic injury and biochemical results were significantly more severe in group 2 than in groups 4 and 6 (P<001). There was no difference between groups 1 and 4 according to XO/(XO+XDH) rates. In newborn rats, H/R produces FOR, which cause serious intestinal damage. Omeprazole and/or gentamicin reduce biochemical and histopathologic bowel damage. This effect was more obvious in omeprazole treated rats. We think omeprazole may open new insights into the treatment of H/R related bowel injuries like NEC.

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Authors and Affiliations

  1. Departments Of Pediatric Surgery, Ondokuz Mayis University, Kurupelit, 55139, Samsun, Turkey

    Ünal Biçakçi, Burak Tander, Ender Aritürk, Rıza Rizalar & Ferit Bernay

  2. Molecular Biology, Ondokuz Mayis University, Kurupelit, 55139, Samsun, Turkey

    Birsen Kiliçoğlu Aydin & Zafer Eren

  3. Pathology, Ondokuz Mayis University, Kurupelit, 55139, Samsun, Turkey

    Oğuz Aydin

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  1. Ünal Biçakçi
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  2. Burak Tander
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Correspondence to Burak Tander.

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Biçakçi, Ü., Tander, B., Aritürk, E. et al. Effects of omeprazole and gentamicin on the biochemical and histopathological alterations of the hypoxia/ reoxygenation induced intestinal injury in newborn rats. Ped Surgery Int 21, 800–805 (2005). https://doi.org/10.1007/s00383-005-1538-y

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