The present invention relates to a transgenic fertilized egg in which expression constructs, excluding human expression constructs, are introduced, including: (a) a nucleotide sequence encoding hypoxia-inducible factor 2α (HIF-2 α) and (b) a transcription-regulating sequence which is operatively linked to the nucleotide sequence, as well as to a transgenic animal model for arthritis obtained therefrom. A transgenic mouse transformed with a recombinant expression vector of the present invention may be very useful as a therapeutic model for arthritis, which may be used in studies on the cartilage degeneration process. In addition, the transgenic mouse of the present invention may be applied to a method for screening arthritis therapeutics.
