Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

  • Resource
  • Published:

Variation in exocrine pancreatic secretion in rats due to different commercial diets

Abstract

The diet fed to laboratory animals is one of many variables that can confound research results. The authors investigated the effect of the composition of commercial standard rodent diets on exocrine pancreatic function in rats. They compared two widely used commercial animal diets and found that diet composition greatly influences pancreatic secretion. Their results indicate that commercial diets should conform to the recommended composition requirements to avoid alterations in physiological functions that would eventually affect the results of biomedical research and that investigators should be keenly aware of the composition of the diets being fed to their animals.

This is a preview of subscription content, access via your institution

Access options

Buy this article

Prices may be subject to local taxes which are calculated during checkout

Figure 1: (a) Body weight in grams of rats eating commercial diets A (▪) and B (□).
Figure 2: (a) Comparison of basal pancreatic flow (μl/min/100 g BW) in rats eating diet A or diet B.
Figure 3: (a) CCK-stimulated pancreatic flow (μl/min/100 g BW) in rats receiving diet A (▪) or diet B (░).
Figure 4: (a) Secretin-evoked pancreatic flow (μl/min/100 g BW) in rats receiving diet A (▪) or diet B (░).

Similar content being viewed by others

References

  1. Solomon, T.E. in Physiology of the Gastrointestinal Tract 3rd Edn. (eds. Johnson, L.R., Christensen, J., Jackson, M.J., Jacobson, E.D. & Walsh, J.H.) 1173–1207 (Raven Press, New York, 1994).

    Google Scholar 

  2. Green, G.M. & Nasset, E.S. Role of dietary protein in rat pancreatic enzyme secretory response to a meal. J. Nutr. 113(11), 2245–2252 (1983).

    Article  Google Scholar 

  3. Swanson, K.C., Benson, J.A., Matthews, J.C. & Harmon, D.L. Pancreatic exocrine secretion and plasma concentration of some gastrointestinal hormones in response to abomasal infusion of starch hydrolysate and/or casein. Anim. Sci. 52(6), 1781–1787 (2004).

    Article  Google Scholar 

  4. Green, G.M., Taguchi, S., Friestman, J., Chey, W.Y. & Liddle, R.A. Plasma secretin, CCK and pancreatic secretion in response to dietary fat in the rat. Am. J. Physiol. 256(6 Pt 1), G1016–G1021 (1989).

    Article  CAS  Google Scholar 

  5. Li, P., Lee, K.Y., Ren, X.S., Chang, T.M. & Chey, W.Y. Effect of pancreatic proteases on plasma cholecystokinin, secretin, and pancreatic exocrine secretion in response to sodium oleate. Gastroenterology 98(6), 1642–1648 (1990).

    Article  Google Scholar 

  6. Spannagel, A.W. et al. Adaptation to fat markedly increases pancreatic secretory response to intraduodenal fat in rats. Am. J. Physiol. 270(1 Pt 1), G128–G135 (1996).

    CAS  PubMed  Google Scholar 

  7. Stubbs, R.S. & Stabile, B.E. Inhibition of the stimulated canine exocrine pancreas by amino acids and fat. Arch. Surg. 124(4), 473–478 (1989).

    Article  Google Scholar 

  8. Hara, H., Narakino, H. & Kiriyama, S. Enhancement of pancreatic secretion by dietary protein in rats with chronic diversion of bile-pancreatic juice form the proximal small intestine. Pancreas 9(2), 275–279 (1994).

    Article  Google Scholar 

  9. Yago, M.D., Martinez-Victoria, E., Huertas, J.R. & Manos, M. Effects of the amount and type of dietary fat on exocrine pancreatic secretion in dogs after different periods of adaptation. Arch. Physiol. Biochem. 105(1), 78–85 (1997).

    Article  Google Scholar 

  10. Liddle, R.A., Green, G.M., Conrad, C.K. & Williams, J.A. Proteins but not amino acids, carbohydrates or fats stimulate cholecystokinin secretion in the rat. Am. J. Physiol. 251(2 Pt 1), G243–G248 (1986).

    CAS  PubMed  Google Scholar 

  11. Manas, M., Yago, M.D., Quiles, J.L., Huertas, J.R. & Martinez-Victoria, E. Absence of rapid adaptation of the exocrine pancreas of conscious dogs to diets enriched in fat or carbohydrates. Arch. Physiol. Biochem. 104(7), 819–825 (1996).

    Article  Google Scholar 

  12. Institute for Laboratory Animal Research, National Research Council. Guide for the Care and Use of Laboratory Animals (National Academy Press, Washington, DC, 1996).

  13. Association of Official Analytical Chemists International. Official Methods of Analysis of the AOAC International 17th Edn. (ed. Horwitz, W.) (AOAC International, Gaithersburg, MD, 2000).

  14. Food and Agriculture Organisation of the United Nations. Food Energy—Methods of Analysis and Conversion Factors. (FAO, Rome, 2003), pp. 57–60.

  15. Elkin, R.G. & Wasynczuk, A.M. Amino acid analysis of foodstuff hydrolysates by precolumn derivatization with phenylisothiocyanate and reversed phase high-performance liquid chromatography. Cereal Chem. 64(4), 226–229 (1987).

    Google Scholar 

  16. Sabbatini, M.E. et al. Atrial natriuretic factor stimulates exocrine pancreatic secretion in the rat through NPR-C receptors. Am. J. Physiol. Gastrointest. Liver Physiol. 285(5), G929–G937 (2003).

    Article  Google Scholar 

  17. Maouyo, D., Sarfati, P., Guan, D., Morisset, J. & Andelson, J.W. Circadian rhythm of exocrine pancreatic secretion in rats: major and minor cycles. Am. J. Physiol. 264(4 Pt 1), G792–G800 (1993).

    CAS  PubMed  Google Scholar 

  18. Lowry, O.H., Rosebrough, N.J., Farr, A.L. & Randall, R.J. Protein measurement with the folin phenol reagent. J. Biol. Chem. 193(1), 265–275 (1951).

    Google Scholar 

  19. National Research Council. Nutrient Requirement of Laboratory Animals 4th Edn. (National Academy Press, Washington, DC, 1995).

  20. Li, Y. & Owyang, C. Vagal afferent pathway mediates physiological action of cholecystokinin on pancreatic enzyme secretion. J. Clin. Invest. 92(1), 418–424 (1993).

    Article  Google Scholar 

  21. Li, J.P., Lee, K.L., Chang, T.-M. & Chey, W.Y. MEK inhibits secretin release and pancreatic secretion: roles of secretin-releasing peptide and somatostatin. Am. J. Physiol. 280, G890–G896 (2001).

    Article  CAS  Google Scholar 

  22. Li, J.P., Chang, T.M. & Chey, W.Y. Roles of 5-HT receptors in the release and action of secretin on pancreatic secretion in rats. Am. J. Physiol Gastrointest. Liver Physiol. 280(4), G595–G602 (2001).

    Article  Google Scholar 

  23. Warwick, Z.S. & Schiffman, S.S. Role of dietary fat in calorie intake and weight gain. Neurosci. Biobehav. Rev. 16(4), 585–596 (1992).

    Article  Google Scholar 

  24. Chilliard, Y. Dietary fat and adipose tissue metabolism in ruminants, pigs, and rodents: a review. J. Dairy Sci. 76(12), 3897–3931 (1993).

    Article  Google Scholar 

  25. International Council for Laboratory Animal Science. Guidelines on the Selection and Formulation of Diets for Animals in Biochemical Research (Institute of Biology, London, 1987).

  26. Saitoh, Y. et al. Effects of eight amino acids on the exocrine and endocrine pancreatic function. Tohoku J. Exp. Med. 129(3), 257–272 (1979).

    Google Scholar 

  27. Shiratori, K., Watanabe, S. & Tekeuchi, T. Effect of fatty acid on secretin release and cholinergic dependence of pancreatic secretion in rats. Pancreas 4(4), 452–458 (1989).

    Article  Google Scholar 

  28. Shiratori, K., Watanabe, S., Takeuchi, T., Shimizu, K. & Moriyoshi, Y. Role of secretin and cholecystokinin in oleic acid–stimulated pancreatic secretion in rats. Gastroenterol. Jpn. 25(1), 104–111 (1990).

    Article  Google Scholar 

  29. Li, P., Lee, K.Y., Chang, T.M. & Chey, W.Y. Hormonal mechanism of sodium oleate-stimulated pancreatic secretion in rats. Am. J. Physiol. 259(6 Pt 1), G960–G965 (1990).

    Article  CAS  Google Scholar 

  30. Guan, D. et al. Role of secretin in basal and fat-stimulated pancreatic secretion in conscious rats. Endocrinology 128(2), 979–982 (1991).

    Article  Google Scholar 

  31. Hjelte, L., Ahren, B., Andren-Sandberg, A., Bottcher, G. & Strandvik, B. Pancreatic function in the essential fatty acid deficient rat. Metabolism 39(8), 871–875 (1990).

    Article  Google Scholar 

Download references

Acknowledgements

Financial support for this work came from grants from Universidad de Buenos Aires (UBACYT B079 and UBACYT B903). The authors thank Dr. Anabel Pallaro for her kind collaboration and contribution to the discussion of this work.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Marcelo S. Vatta.

Ethics declarations

Competing interests

The authors declare no competing financial interests.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Sabbatini, M., Pellegrino, N., Rios, M. et al. Variation in exocrine pancreatic secretion in rats due to different commercial diets. Lab Anim 35, 41–49 (2006). https://doi.org/10.1038/laban0606-41

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1038/laban0606-41

This article is cited by

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing