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Changes in plasma and duodenal cholecystokinin concentrations after pancreatic duct occlusion in rats

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Abstract

The changes in plasma and duodenal cholecystokinin (CCK) concentrations after pancreatic duct occlusion were examined in rats. The rats were sacrificed 1, 3, 7, 10, 14, and 30 days after occlusion of the duct. Histological examination showed acute inflammation on days 1 and 3 after duct occlusion, interstitial fibrosis and regenerative changes on days 7, 10, and 14, and pancreatic atrophy on day 30. The plasma CCK concentration increased from 0.45 pM to 2.0 pM after the occlusion and then remained high throughout the observation period. In contrast to the stable increase in plasma CCK concentration, the CCK content in the duodenum increased on days 1 and 3, decreased on day 7, increased on day 10, reaching over the control level on day 14, and then returned to the control level on day 30. Administration of boiled and 10-fold concentrated rat pancreatic juice or human pancreatic secretory trypsin inhibitor for seven days after pancreatic duct occlusion reversed the decrease in duodenal CCK content. The major molecular forms of duodenal CCK were CCK-8, -33, and -58. These results indicate that (1) basal plasma CCK concentration did not reflect the duodenal CCK content, (2) duodenal CCK content was well correlated with a decrease in inflammation in the pancreas, and (3) a nonenzymatic component in the pancreatic juice reversed the decrease in duodenal CCK content and body weight caused by pancreatic duct occlusion.

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Authors and Affiliations

  1. Department of Clinical Physiology, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakaecho Itabashiku, 173, Tokyo, Japan

    Kyoko Miyasaka MD, Akihiro Funakoshi MD, Atsuo Jimi MD, Rieko Nakamura MD, Masahiro Matsumoto MD & Kenichi Kitani MD

  2. National Kyushu Cancer Center, 815, Fukuoka

    Kyoko Miyasaka MD, Akihiro Funakoshi MD, Atsuo Jimi MD, Rieko Nakamura MD, Masahiro Matsumoto MD & Kenichi Kitani MD

  3. First Department of Pathology, Kurume University, 830, Kurume

    Kyoko Miyasaka MD, Akihiro Funakoshi MD, Atsuo Jimi MD, Rieko Nakamura MD, Masahiro Matsumoto MD & Kenichi Kitani MD

  4. First Department of Internal Medicine, Tokyo Medical and Dental University, 113, Tokyo, Japan

    Kyoko Miyasaka MD, Akihiro Funakoshi MD, Atsuo Jimi MD, Rieko Nakamura MD, Masahiro Matsumoto MD & Kenichi Kitani MD

Authors
  1. Kyoko Miyasaka MD
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  2. Akihiro Funakoshi MD
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  3. Atsuo Jimi MD
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  4. Rieko Nakamura MD
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  5. Masahiro Matsumoto MD
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  6. Kenichi Kitani MD
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Additional information

This study was supported in part by grants from the Ministry of Education, Science and Culture and the Yamanouchi Foundation for Research on Metabolic Disorders.

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Miyasaka, K., Funakoshi, A., Jimi, A. et al. Changes in plasma and duodenal cholecystokinin concentrations after pancreatic duct occlusion in rats. Digest Dis Sci 37, 369–377 (1992). https://doi.org/10.1007/BF01307730

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  • DOI: https://doi.org/10.1007/BF01307730

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