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Related Experiment Video

Updated: May 16, 2026

Peptides from Phage Display Library Modulate Gene Expression in Mesenchymal Cells and Potentiate Osteogenesis in Unicortical Bone Defects

Peptides from Phage Display Library Modulate Gene Expression in Mesenchymal Cells and Potentiate Osteogenesis in Unicortical Bone Defects

Published on: December 10, 2010

Bone-specific overexpression of NPY modulates osteogenesis.

I Matic¹, B G Matthews, T Kizivat

¹Department of Reconstructive Sciences, University of Connecticut Health Center, Farmington, CT 06032, USA.

Journal of Musculoskeletal & Neuronal Interactions

|December 1, 2012

Summary

Bone-derived Neuropeptide Y (NPY) reduces bone formation. Overexpressing NPY in osteoblasts and osteocytes decreased bone volume and impaired osteogenic gene expression in mice, highlighting NPY

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Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model

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Published on: July 3, 2020

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Last Updated: May 16, 2026

Peptides from Phage Display Library Modulate Gene Expression in Mesenchymal Cells and Potentiate Osteogenesis in Unicortical Bone Defects

Peptides from Phage Display Library Modulate Gene Expression in Mesenchymal Cells and Potentiate Osteogenesis in Unicortical Bone Defects

Published on: December 10, 2010

Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model

Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model

Published on: July 3, 2020

Area of Science:

Endocrinology
Bone Biology
Metabolic Regulation

Background:

Neuropeptide Y (NPY) is implicated in appetite and energy balance.
Genetic evidence suggests NPY negatively impacts bone formation centrally and peripherally.
NPY is produced by bone cells, including osteocytes and osteoblasts, suggesting a role in bone metabolism.

Purpose of the Study:

To investigate the specific role of NPY derived from bone cells in regulating bone metabolism.
To determine if osteoblast/osteocyte-derived NPY influences osteogenesis.

Main Methods:

Generation of a transgenic mouse model (Col2.3NPY) with NPY overexpression in mature osteoblasts and osteocytes.
In vivo characterization of bone phenotype in Col2.3NPY mice.
In vitro analysis of calvarial osteoblast cultures from Col2.3NPY mice.

Main Results:

Col2.3NPY mice exhibited reduced trabecular and cortical bone volume at 3 months.
Bone formation rate and osteoclast activity remained unchanged.
Osteoblast cultures showed decreased mineralization and reduced expression of osteogenic markers.

Conclusions:

Osteoblast/osteocyte-derived NPY can alter osteogenesis both in vivo and in vitro.
Bone-derived NPY is a significant factor in regulating bone formation.
Other peripheral NPY sources, like the sympathetic nervous system and vasculature, may also contribute to bone turnover.