open access

Vol 77, No 3 (2018)
ORIGINAL ARTICLES
Published online: 2017-11-06
Submitted: 2017-09-20
Accepted: 2017-10-28
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Fractal and stereological analyses of insulin-induced rat exocrine pancreas remodelling

M. Pajevic, M. Aleksic, I. Golic, M. Markelic, V. Otasevic, A. Jankovic, A. Stancic, B. Korac, A. Korac
DOI: 10.5603/FM.a2017.0106
·
Pubmed: 29131278
·
Folia Morphol 2018;77(3):478-484.

open access

Vol 77, No 3 (2018)
ORIGINAL ARTICLES
Published online: 2017-11-06
Submitted: 2017-09-20
Accepted: 2017-10-28

Abstract

Background: The effect of insulin on the endocrine pancreas has been the subject of extensive study, but quantitative morphometric investigations of the exocrine pancreas are scarce. This study was therefore undertaken to investigate the effect of acute and chronic insulin administration (two doses, 0.4 IU and 4 IU) on the morphology of rat pancreas acini. Materials and methods: Semi-fine sections stained with methylene blue and basic fuchsine or haematoxylin and eosin-stained 5-micrometer thick paraffin sections were used for fractal and stereological analysis of exocrine acini. Acute insulin treatment, independent of applied doses increased fractal dimension in line with decreased lacunarity of pancreas acini. Chronic low dose insulin decreased fractal dimension and increased lacunarity of pancreas acini, but a high dose had the opposite effect. The volume densities (Vv) of cytoplasm, granules and nucleus are affected differently: acute low dose and high chronic dose significantly decreased granules Vv, and in line increased cytoplasmic Vv, whereas other examined structures showed slight changes without statistical significance. Results: The results obtained from this investigation indicate that insulin treatment induced structural remodelling of the exocrine pancreas suggesting a substantial role of insulin in its functioning. Conclusions: Additionally, we showed that fine architectural changes in acini could be detected by fractal analysis, suggesting this method as an alternative or addition to routine stereology.

Abstract

Background: The effect of insulin on the endocrine pancreas has been the subject of extensive study, but quantitative morphometric investigations of the exocrine pancreas are scarce. This study was therefore undertaken to investigate the effect of acute and chronic insulin administration (two doses, 0.4 IU and 4 IU) on the morphology of rat pancreas acini. Materials and methods: Semi-fine sections stained with methylene blue and basic fuchsine or haematoxylin and eosin-stained 5-micrometer thick paraffin sections were used for fractal and stereological analysis of exocrine acini. Acute insulin treatment, independent of applied doses increased fractal dimension in line with decreased lacunarity of pancreas acini. Chronic low dose insulin decreased fractal dimension and increased lacunarity of pancreas acini, but a high dose had the opposite effect. The volume densities (Vv) of cytoplasm, granules and nucleus are affected differently: acute low dose and high chronic dose significantly decreased granules Vv, and in line increased cytoplasmic Vv, whereas other examined structures showed slight changes without statistical significance. Results: The results obtained from this investigation indicate that insulin treatment induced structural remodelling of the exocrine pancreas suggesting a substantial role of insulin in its functioning. Conclusions: Additionally, we showed that fine architectural changes in acini could be detected by fractal analysis, suggesting this method as an alternative or addition to routine stereology.

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Keywords

insulin; pancreas acini; fractal analysis; stereology

About this article
Title

Fractal and stereological analyses of insulin-induced rat exocrine pancreas remodelling

Journal

Folia Morphologica

Issue

Vol 77, No 3 (2018)

Pages

478-484

Published online

2017-11-06

DOI

10.5603/FM.a2017.0106

Pubmed

29131278

Bibliographic record

Folia Morphol 2018;77(3):478-484.

Keywords

insulin
pancreas acini
fractal analysis
stereology

Authors

M. Pajevic
M. Aleksic
I. Golic
M. Markelic
V. Otasevic
A. Jankovic
A. Stancic
B. Korac
A. Korac

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