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DIFFERENCES IN ADRENAL MORPHOLOGY IN MALE DARK AGOUTI, SPRAGUE-DAWLEY AND WISTAR RATS

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Abstract:

There is little published information describing the differences in adrenal structure between strains of a single species despite quite well known functional differences. In this paper we report morphological differences in the adrenal glands between three strains of laboratory rat; Dark Agouti (DA), Sprague-Dawley (SD) and Wistar (W). Significant differences in adrenal weights (as a percentage of body weight) were not detected between any of the groups. While there were no significant differences in the volume of medullary or zonae glomerulosa or fasciculata tissue, the volume fraction for the zona reticularis was significantly smaller in DAs compared to the other strains. The functional significance of these differences is unknown. However, it is suggested that the reduced volume of zona reticularis tissue may contribute to a reduced capacity for glucocorticoid synthesis or storage.

Keywords: adrenal cortex; dark agouti; rat; sprague-dawley; wistar

Document Type: Research Article

Publication date: December 9, 1999

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