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Characterization of secretin release in response to food and intraduodenal administration of fat and hydrochloric acid

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Abstract

The development and validation of a radioimmunoassay that detects release of secretin in plasma in response to low doses of secretagogues [intraduodenal HCl (0.033 meq/min); intraduodenal sodium oleate (0.04 mmol/min)] or an oral mixed meal in conscious dogs is described. Plasma secretin levels increased significantly (P<0.05) in response to an oral mixed meal in conscious dogs from a basal level of 4.0 to a peak level of 12.3 pg/ml at 15 min. Infusion of graded doses of HCl (2, 4, 8, 16, meq/hr for 30 min) intraduodenally in six dogs resulted in significant elevation of plasma secretin levels in a dose-dependent manner. The pancreatic bicarbonate and volume outputs correlated with the dosage of HCl administered and with the elevations in plasma secretin concentrations. Intraduodenal infusion of increasing doses of sodium oleate (2.4, 4.8, 9.6, and 19.2 mmol in 15-min periods) resulted in a significant (P<0.05) elevation of plasma levels of secretin.

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Author information

Author notes

  1. Guillermo Gomez MD (Visiting Scientist)

    Present address: Department of Gastroenterology, Pontificia Universidad Catolica de Chile, Santiago, Chile

  2. Tsukuru Hashimoto MD (Visiting Scientist)

    Present address: First Department of Surgery, Osaka University Medical School, Osaka, Japan

  3. Tadashi Miyashita MD (Visiting Scientist)

    Present address: First Department of Surgery, Kyoto University Medical School, Kyoto, Japan

Authors and Affiliations

  1. Department of Surgery and Office of Academic Computing and Biostatistics, The University of Texas Medical Branch, 77550, Galveston, Texas

    Edwin J. Draviam PhD,  Guillermo Gomez MD (Visiting Scientist),  Tsukuru Hashimoto MD (Visiting Scientist),  Tadashi Miyashita MD (Visiting Scientist), Freddie L. C. Hill BS, Tatsuo Uchida MS, Pomila Singh PhD, George H. Greeley Jr. PhD & James C. Thompson MD

Authors
  1. Edwin J. Draviam PhD
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  2. Guillermo Gomez MD
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  3. Tsukuru Hashimoto MD
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  4. Tadashi Miyashita MD
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  5. Freddie L. C. Hill BS
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  6. Tatsuo Uchida MS
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  7. Pomila Singh PhD
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  8. George H. Greeley Jr. PhD
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  9. James C. Thompson MD
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Additional information

Supported by grants from the National Institutes of Health (5R37 DK 15241, PO1 DK 35608).

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Draviam, E.J., Gomez, G., Hashimoto, T. et al. Characterization of secretin release in response to food and intraduodenal administration of fat and hydrochloric acid. Digest Dis Sci 36, 513–519 (1991). https://doi.org/10.1007/BF01298885

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  • DOI: https://doi.org/10.1007/BF01298885

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