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Japanese

EFFECTS OF LIDOCAINE UPON CCK-PZ AND SECRETIN PRODUCING PARANEURONS IN THE CANINE DUODENUM RESPONDING TO LUMINAL CHEMICAL STIMULI Kazunori Sato 1 , Susumu Muraki 1 , Tsuneo Fujita 2 , Ryoko Noguch 1 , Koki Shimoji 1 1Department of Anesthesiology Niigata University, School of Medicine 2Department of Anatomy, Niigata University, School of Medicine pp.375-381
Published Date 1982/4/1
DOI https://doi.org/10.11477/mf.1406204924
  • Abstract
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Amino acid solution (50 mM tryptophan and 50 mM phenylalanine in saline) introduced into the canine duodenal loop causes an increased enzyme output from the pancreas, whereas administration of 0.1 N HCI into the duodenal loop causes an increased juice flow from the organ.

Local anesthetic, lidocaine, introduced into the duodenal lumen suppressed the pancreatic enzymereleasing response to the intraluminal amino acid without affecting the juice flow response to the hydrochloric stimulus. Intravenously administered lidocaine did not block the pancreatic response to the intraluminal amino acid stimulus, suggesting that lidocaine affects the chemoreceptive, apical part of the endocrine cell or paraneuron which releases cholecystokinin-pancreozymin (CCK-PZ). Neither was the pancreas responding to an intra-venous injection of CCK-PZ (5 Ivy Dog Units) suppressed by intravenously administered lidocaine even when its arterial concentration exceeded the convulsion level. This indicates that lidocaine af-fects the duodenal paraneurons recognizing the luminal stimuli but not the pancreatic cells re-sponding to the hormones released by them.

The results further suggest that in paraneurons as well as in neurons there seems to be a spectrum with regard to the susceptibility to anesthetics ; thus the secretin releasing paraneuron is much more resistant to lidocaine than the CCK-PZ pro-ducing one.


Copyright © 1982, Igaku-Shoin Ltd. All rights reserved.

基本情報

電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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