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Morphologic changes in gastric mucosa of aging rats

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Abstract

We examined histologic and ultrastructural changes in the gastric mucosa of aging rats. Standardized gastric specimens from Sprague-Dawley rats 3 months of age (young) and 24 months of age (old) were evaluated by qualitative and quantitative histology and transmission electron microscopy. Old rats had the following histologic changes: (1) partial atrophy of the gastric glands and their replacement with hyalinlike connective tissue; (2) cystic dilatation of the gastric glands at the bases with occasional squamous cell metaplasia; and (3) extensive perivascular depositions of PAS-positive material, negative for amyloid. The total mucosal thickness was 484±100 μm in young rats vs 1122 ±240μm in old rats (P<0.01). Electron microscopy demonstrated degenerative changes in parietal and chief cells, hyperplasia of surface and foveolar mucous cells, and prominent accumulation of disorganized collagen fibrils in perivascular connective tissue. This study indicates that the gastric mucosa of aging rats that have not been exposed to damaging agents does show definite histologic and ultrastructural changes.

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Authors and Affiliations

  1. Division of Gastroenterology, University of California, Irvine

    Daniel Hollander, Andrzej Tarnawski,  Jerzy Stachura (Visiting scientist) & Hella Gergely

  2. Gastroenterology Section, VA Medical Center, Long Beach, California

    Daniel Hollander, Andrzej Tarnawski,  Jerzy Stachura (Visiting scientist) & Hella Gergely

  3. University Medical School, Krakow, Poland

    Jerzy Stachura (Visiting scientist)

Authors
  1. Daniel Hollander
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  2. Andrzej Tarnawski
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  3. Jerzy Stachura
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  4. Hella Gergely
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Additional information

Preliminary data have been published as an abstract inGastroenterology 90:1658, 1986.

These studies were supported by grant AG02767-04 from the National Institute on Aging and in part by the Goldsmith Foundation.

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Hollander, D., Tarnawski, A., Stachura, J. et al. Morphologic changes in gastric mucosa of aging rats. Digest Dis Sci 34, 1692–1700 (1989). https://doi.org/10.1007/BF01540046

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  • DOI: https://doi.org/10.1007/BF01540046

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