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Network-based Transcriptome-wide Expression Study for Postmenopausal Osteoporosis.

Lan Zhang1, Tian-Liu Peng2, Le Wang2

  • 1Center for Biomedical informatics and Genomics, Department of Medicine, Tulane University, New Orleans, Louisiana.

The Journal of Clinical Endocrinology and Metabolism
|June 3, 2020
PubMed
Summary
This summary is machine-generated.

This study identifies key gene pathways in monocytes linked to postmenopausal osteoporosis. These findings highlight potential targets for understanding bone mineral density (BMD) variations and developing new osteoporosis treatments.

Keywords:
coexpression analysisosteoclastpostmenopausal osteoporosissiRNAtranscriptomics

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Area of Science:

  • Genomics and Molecular Biology
  • Endocrinology and Metabolism
  • Immunology

Background:

  • Menopause is a significant life transition associated with increased health risks, including osteoporosis.
  • Bone mineral density (BMD) loss after menopause is a major concern, necessitating research into its underlying genetic mechanisms.

Purpose of the Study:

  • To identify genes and biological pathways in human peripheral blood monocytes (PBMs) associated with postmenopausal osteoporosis.
  • To analyze transcriptome-wide gene expression in Caucasian postmenopausal women with differing BMD levels.

Main Methods:

  • Multiscale embedded gene coexpression network analysis (MEGENA) to identify gene networks.
  • Gene sets net correlations analysis (GSNCA) to compare gene coexpression structures between high and low BMD groups.
  • Bayesian network (BN) analysis and in vitro siRNA experiments to validate gene regulation.

Main Results:

  • MEGENA identified enriched "T cell receptor signaling" and "osteoclast differentiation" pathways correlated with BMD variation.
  • GSNCA showed significant differences in the "Signaling by TGF-beta receptor complex pathway" coexpression between BMD groups, with FURIN and SMAD3 as hub genes.
  • In vitro experiments confirmed regulatory relationships involving TGFBR2, SMAD7, TGFBR1, and SMURF2.

Conclusions:

  • Biological signals regulating monocyte recruitment, development, and osteoclast formation in PBMs are implicated in postmenopausal osteoporosis pathogenesis.
  • These findings suggest potential PBM-based molecular targets for addressing osteoporosis in postmenopausal women.