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Updated: Jun 8, 2026
12:49
Isolation of Intact, Whole Mouse Mammary Glands for Analysis of Extracellular Matrix Expression and Gland Morphology
Published on: October 30, 2017
Elevated circulating IGF-I promotes mammary gland development and proliferation.
Dara Cannata1, Danielle Lann, Yingjie Wu
1Division of Endocrinology, Diabetes, and Bone Diseases, The Samuel Bronfman Department of Medicine, Mount Sinai School of Medicine, New York, New York 10029, USA.
Endocrinology
|October 8, 2010
Summary
Elevated circulating Insulin-like Growth Factor-I (IGF-I) promotes mammary gland development. Both local and endocrine IGF-I are crucial, with higher circulating levels accelerating epithelial cell proliferation.
Area of Science:
- Endocrinology
- Developmental Biology
- Molecular Biology
Background:
- Insulin-like Growth Factor-I (IGF-I) is vital for mammary gland development.
- Previous research indicated local IGF-I is more critical than circulating IGF-I.
Purpose of the Study:
- To investigate the impact of increased circulating IGF-I on mammary gland development.
- To differentiate the roles of local versus endocrine IGF-I in this process.
Main Methods:
- Utilized hepatic IGF-I transgenic (HIT) and IGF-I knockout/HIT (KO-HIT) mouse models.
- Analyzed mammary gland complexity and cell proliferation via immunohistochemistry.
Main Results:
- HIT mice showed enhanced mammary gland complexity and proliferation compared to controls.
- KO-HIT mice exhibited mammary gland development similar to controls.
- Elevated circulating IGF-I alone supported normal pubertal mammary epithelial development.
Conclusions:
- Both local and endocrine IGF-I significantly contribute to mammary gland development.
- Increased circulating IGF-I accelerates mammary epithelial proliferation, suggesting a key endocrine role.
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