Cells Tissues Organs
Morphometry and Elemental Analysis of Rat Exocrine Pancreas following Administration of Trypsin InhibitorSato T. · Herman L.Department of Cell Biology and Anatomy, New York Medical College, Valhalla, N.Y., USA
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Article / Publication Details
Received: March 15, 1989
Accepted: June 05, 1989
Published online: July 16, 2008
Issue release date: 1990
Number of Print Pages: 12
Number of Figures: 0
Number of Tables: 0
ISSN: 1422-6405 (Print)
eISSN: 1422-6421 (Online)
For additional information: https://www.karger.com/CTO
Abstract
The morphological responses of the exocrine pancreas of the adult male rat to soybean trypsin inhibitor (STI) were studied by ultrastructural morphometry and electron probe X-ray microanalysis. STI administered orally in drinking water for 14 days resulted in a 72% increase in the wet weight of the pancreas. This enlargement was due, largely, to an increase in acinar cell mass. Volume increases in the acinar cell mass and extra-acinar cell compartment were 72 and 30% respectively. The estimated total number of acinar cells in the mean exocrine pancreas was 500 million in the control and 630 million in the experimental group, representing an increase of 27%. Acinar cell volume was 1,790 µm3 for the control and 2,457 µm3 for the STI group. The pronounced morphometric changes of the organelles in the STI group were: the mean nucleolar volume increased by 56%; the volume of zymogen granular mass per cell increased by 93%; the volume of the Golgi complex and the condensing vacuoles per cell increased by 52 and 100% respectively, whereas the membrane area of the Golgi complex and the condensing vacuoles increased by 98 and 47% respectively. Spectral analysis of seven elements (Na, Mg, P, S, Cl, K and Ca) showed significant changes for nuclei, zymogen granules and mitochondria following STI: nuclei showed Na, P, K increased; zymogen granules showed Na, P, S, K increased, Cl decreased; mitochondrial particles showed Mg, P, Cl, Ca increased, and the mitochondrial matrix showed S decreased. The persistent uptake of STI probably resulted in a continual release of a trophic hormone acting on pancreatic tissue components consequently causing hyperplasia and hypertrophy of the exocrine pancreas to accommodate a heightened demand for synthesis of exportable proteins.
© 1990 S. Karger AG, Basel
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Article / Publication Details
Received: March 15, 1989
Accepted: June 05, 1989
Published online: July 16, 2008
Issue release date: 1990
Number of Print Pages: 12
Number of Figures: 0
Number of Tables: 0
ISSN: 1422-6405 (Print)
eISSN: 1422-6421 (Online)
For additional information: https://www.karger.com/CTO
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Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher.Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
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