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Related Experiment Video

Updated: May 17, 2026

Precise Visualization of Insulin Receptors A and B in Murine Brain with an RNA In Situ Hybridization Assay
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Precise Visualization of Insulin Receptors A and B in Murine Brain with an RNA In Situ Hybridization Assay

Published on: July 15, 2025

Transcriptome correlation analysis identifies two unique craniosynostosis subtypes associated with IRS1 activation.

B D Stamper1, B Mecham, S S Park

  • 1Center for Tissue and Cell Sciences, Seattle Children's Research Institute, Seattle, Washington 98101, USA. stamperb@pacificu.edu

Physiological Genomics
|October 18, 2012
PubMed
Summary
This summary is machine-generated.

Nonsyndromic craniosynostosis involves distinct subtypes A and B, identified through transcriptome analysis. Both subtypes share altered Insulin-like Growth Factor 1 Receptor (IGF1R) signaling, highlighting IRS1

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Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
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Related Experiment Videos

Last Updated: May 17, 2026

Precise Visualization of Insulin Receptors A and B in Murine Brain with an RNA In Situ Hybridization Assay
08:34

Precise Visualization of Insulin Receptors A and B in Murine Brain with an RNA In Situ Hybridization Assay

Published on: July 15, 2025

Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
08:03

Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model

Published on: November 4, 2025

Area of Science:

  • Genetics and Molecular Biology
  • Developmental Biology
  • Cell Signaling

Background:

  • Nonsyndromic craniosynostosis is a complex congenital disorder characterized by premature fusion of cranial sutures.
  • Identifying the underlying genetic and molecular mechanisms has been challenging due to the disease's heterogeneity.
  • Previous research has suggested a role for growth factor signaling pathways in craniosynostosis pathogenesis.

Purpose of the Study:

  • To identify distinct molecular subtypes of nonsyndromic craniosynostosis using differential transcriptome correlation analysis.
  • To investigate the role of specific signaling pathways, including IGF and integrin pathways, in these subtypes.
  • To elucidate the functional consequences of altered gene expression and signaling on osteoblast function and disease pathology.

Main Methods:

  • Differential transcriptome correlation analysis to identify molecular subtypes (A and B).
  • Phosphorylation assays on primary osteoblast cell lines from craniosynostosis subtypes and IGF1R variants.
  • Analysis of key signaling proteins including IRS1, Akt, GSK3β, IGF1R, JNK, p38, and p70S6K.

Main Results:

  • Two distinct subtypes (A and B) of nonsyndromic craniosynostosis were identified with unique gene correlation structures.
  • Subtype A showed high Insulin-like Growth Factor (IGF) pathway expression and a hypomineralization phenotype.
  • Subtype B exhibited high integrin expression and implicated IRS1-mediated Akt signaling activation.

Conclusions:

  • Altered phosphorylation patterns of IRS1 were consistent across both subtypes and IGF1R variants, indicating a critical role for IRS1.
  • Specific signaling pathway dysregulation, including IGF and integrin pathways, contributes to the distinct molecular profiles of craniosynostosis subtypes.
  • These findings implicate IRS1 as a key player in the pathogenesis of nonsyndromic craniosynostosis, offering potential therapeutic targets.