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PMID:20676705

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Citation

Kim, Y, Murao, H, Yamamoto, K, Deng, JM, Behringer, RR, Nakamura, T and Akiyama, H (2011) Generation of transgenic mice for conditional overexpression of Sox9. J. Bone Miner. Metab. 29:123-9

Abstract

Sox9 belongs to the family of Sry-related high-mobility group box transcription factors controlling cell fate, cell proliferation and differentiation in various tissues, including cartilage, testis, the central nervous system, kidney, and gastrointestine. Mice conditionally lacking Sox9 have revealed essential roles for Sox9 in these tissues. To gain further insight into the role of Sox9 in different tissues and at different stages of development, we have generated a transgenic mouse line to express Sox9 in a Cre recombinase-dependent manner. The construct contained the human cytomegalovirus enhancer and chicken β-actin promoter, and a floxed monomeric red fluorescence protein 1 (mRFP1) cassette to direct ubiquitous expression of mRFP1. Cre expression removed the mRFP1 gene, allowing expression of Sox9 and enhanced green fluorescent protein. Expectedly, overexpression of Sox9 in chondrocytes using Col2a1-Cre mice suppressed chondrocyte hypertrophy, and delayed terminal differentiation and subsequent ossification. Misexpression of Sox9 in hypertrophic chondrocytes using Col10a1-Cre knock-in mice also delayed terminal differentiation. This Sox9 conditional transgenic mouse line will be a valuable tool to uncover tissue-specific and developmental stage-specific functions of Sox9.

Links

PubMed Online version:10.1007/s00774-010-0206-z

Keywords

Animals; Cell Differentiation/physiology; Chondrocytes/cytology; Chondrocytes/metabolism; Mice; Mice, Inbred C57BL; Mice, Transgenic; Reverse Transcriptase Polymerase Chain Reaction; SOX9 Transcription Factor/genetics; SOX9 Transcription Factor/metabolism

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

HUMAN:SOX9

involved_in

GO:0003413: chondrocyte differentiation involved in endochondral bone morphogenesis

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

HUMAN:SOX9

involved_in

GO:0032332: positive regulation of chondrocyte differentiation

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete


See also

References

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