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Related Experiment Video

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Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model
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Osteoclast stimulation factor 1 (Ostf1) KNOCKOUT increases trabecular bone mass in mice.

Matthieu Vermeren1,2, Rodanthi Lyraki1, Sachin Wani1

  • 1Institute for Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital Campus, Crewe Road, Edinburgh, EH4 2XU, UK.

Mammalian Genome : Official Journal of the International Mammalian Genome Society
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Summary

Osteoclast stimulation factor 1 (OSTF1) plays a role in bone development. This study generated an Ostf1 knockout mouse model, revealing its widespread expression and increased trabecular bone mass.

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Area of Science:

  • Genetics and Molecular Biology
  • Developmental Biology
  • Physiology

Background:

  • Osteoclast stimulation factor 1 (OSTF1) is an SH3-domain protein linked to osteoclast activation and human diseases like spinal muscular atrophy.
  • OSTF1 is also implicated in a human developmental microdeletion syndrome.

Purpose of the Study:

  • To investigate the function and expression pattern of OSTF1.
  • To determine the role of OSTF1 in mouse development and physiology.

Main Methods:

  • Generation of an Ostf1 knockout mouse model with exons 3 and 4 replaced by a LacZ ORF.
  • Extensive X-Gal staining for expression analysis in embryonic and adult tissues.
  • Phenotyping including SHIRPA behavioral testing and bone analysis.

Main Results:

  • Widespread expression of Ostf1 in the vasculature and various cell types in adult and embryonic mouse tissues.
  • No observed behavioral defects in Ostf1 knockout mice via SHIRPA testing.
  • Significant increase in trabecular bone mass in the long bones of knockout mice.

Conclusions:

  • OSTF1 is widely expressed during mouse development and in adult tissues, particularly in the vasculature.
  • OSTF1 is confirmed to play a role in regulating bone development, specifically trabecular bone mass.
  • The Ostf1 knockout mouse model provides a valuable tool for further research into OSTF1 function.