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Bombesin stimulates enterocyte turnover following massive small bowel resection in a rat

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Abstract

Recent evidence suggests that bombesin (BBS) is involved in modulation of growth and differentiation of normal small intestine. The purpose of the present study was to evaluate the effects of BBS on enterocyte turnover after massive small bowel resection in a rat. Male Sprague-Dawley rats were divided into three experimental groups: Sham rats underwent bowel transection and re-anastomosis, short bowel syndrome (SBS) rats underwent a 75% small bowel resection, and SBS-BBS rats underwent bowel resection and were treated with BBS given subcutaneously at a dose of 20 μg/kg, once daily, from postoperative day 3 through 14. Parameters of intestinal adaptation (bowel and mucosal weights, mucosal DNA and protein, villus height and crypt depth), enterocyte proliferation and enterocyte apoptosis were determined in jejunum and ileum on day 15 following operation. RT-PCR technique was used to determine Bax and Bcl-2 gene expression in ileal mucosa. Statistical analysis was performed using the non-parametric Kruskal–Wallis ANOVA test, with P less than 0.05 considered statistically significant. Treatment with BBS resulted in a significant increase in ileal bowel and mucosal weight, ileal mucosal DNA and protein, jejunal and ileal villus height, jejunal crypt depth, and jejunal and ileal proliferation index compared to SBS-animals. SBS rats showed a significant increase in Bax and Bcl-2 expression in ileum that was accompanied by a significant increase in cell apoptosis compared to sham animals. SBS-BBS rats demonstrated a significant decrease in Bax and Bcl-2 expression in ileum and a decrease in apoptotic index compared to SBS-animals. In conclusion, in a rat model of SBS, BBS enhances enterocyte turnover and stimulates structural intestinal adaptation. Decreased Bax expression may be responsible for the inhibitory effect of BBS on enterocyte apoptosis.

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Authors and Affiliations

  1. Department of Pediatric Surgery, Pediatrics and Pathology, Bnai Zion Medical Center, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, 47 Golomb St., P.O.B. 4940, Haifa, 31048, Israel

    Igor Sukhotnik, Nadav Slijper, Rachel Karry, Ron Shaoul, Michael Lurie & Jorge G. Mogilner

  2. Department of Surgery, Carmel Medical Center, 7 Mihal St., Haifa, 34362, Israel

    Eitan Shiloni

  3. Section of Pediatric Surgery, F3970 Mott Children’s Hospital, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI, 48109-0245, USA

    Arnold G. Coran

Authors
  1. Igor Sukhotnik
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  2. Nadav Slijper
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  3. Rachel Karry
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  4. Ron Shaoul
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  5. Arnold G. Coran
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  6. Michael Lurie
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  7. Eitan Shiloni
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  8. Jorge G. Mogilner
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Correspondence to Igor Sukhotnik.

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N. Slijper contributed equally to the preparation of this manuscript.

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Sukhotnik, I., Slijper, N., Karry, R. et al. Bombesin stimulates enterocyte turnover following massive small bowel resection in a rat. Pediatr Surg Int 23, 397–404 (2007). https://doi.org/10.1007/s00383-006-1862-x

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  • DOI: https://doi.org/10.1007/s00383-006-1862-x

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