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Published in: Journal of Ovarian Research 1/2012

Open Access 01-12-2012 | Research

Morphology of ovaries in laron dwarf mice, with low circulating plasma levels of insulin-like growth factor-1 (IGF-1), and in bovine GH-transgenic mice, with high circulating plasma levels of IGF-1

Authors: Sylwia Słuczanowska-Głąbowska, Maria Laszczyńska, Katarzyna Piotrowska, Wojciech Głąbowski, John J Kopchick, Andrzej Bartke, Magda Kucia, Mariusz Z Ratajczak

Published in: Journal of Ovarian Research | Issue 1/2012

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Abstract

Background

It is well known that somatotrophic/insulin signaling affects lifespan in experimental animals, and one of the signs of aging is progressive gonadal dysfunction.

Methods

To study the effects of insulin-like growth factor-1 (IGF-1) plasma level on ovaries, we analyzed ovaries isolated from 2-year-old growth hormone receptor knockout (GHR-KO) Laron dwarf mice, with low circulating plasma levels of IGF-1, and 6-month-old bovine growth hormone transgenic (bGHTg) mice, with high circulating plasma levels of IGF-1. The ages of the Laron dwarf mutants employed in our studies were selected based on their overall survival (up to ~ 4 years for Laron dwarf mice and ~ 1 year for bGHTg mice).

Results

Morphological analysis of the ovaries of mice that reached ~50% of their maximal life span revealed a lower biological age for the ovaries isolated from 2-year-old Laron dwarf mice than their normal-lifespan wild type littermates. By contrast, the ovarian morphology of increased in size 6 month old bGHTg mice was generally normal.

Conclusion

Ovaries isolated from 2-year-old Laron dwarf mice exhibit a lower biological age compared with ovaries from normal WT littermates at the same age. At the same time, no morphological features of accelerated aging were found in 0.5-year-old bGHTg mice compared with ovaries from normal the same age-matched WT littermates.
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Metadata
Title
Morphology of ovaries in laron dwarf mice, with low circulating plasma levels of insulin-like growth factor-1 (IGF-1), and in bovine GH-transgenic mice, with high circulating plasma levels of IGF-1
Authors
Sylwia Słuczanowska-Głąbowska
Maria Laszczyńska
Katarzyna Piotrowska
Wojciech Głąbowski
John J Kopchick
Andrzej Bartke
Magda Kucia
Mariusz Z Ratajczak
Publication date
01-12-2012
Publisher
BioMed Central
Published in
Journal of Ovarian Research / Issue 1/2012
Electronic ISSN: 1757-2215
DOI
https://doi.org/10.1186/1757-2215-5-18

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