C57BL/6-F9tm1(F9)Bcgen/Bcgen • 112829
Gene targeting strategy for B-hFIX mice.
Strain specific analysis of FIX mRNA expression in wild-type C57BL/6JNifdc mice and B-hFIX mice by RT-PCR. Liver mRNA were isolated from wild-type C57BL/6JNifdc mice (+/Y) and homozygous B-hFIX mice (H/Y), then cDNA libraries were synthesized by reverse transcription, followed by PCR with mouse or human FIX primers. Mouse F9 was detectable only in wild-type mice. Human FIX mRNA was detectable only in homozygous B-hFIX mice but not in wild-type mice.
Strain specific FIX expression analysis in wild-type C57BL/6JNifdc mice and homozygous humanized B-hFIX mice by ELISA. Plasma was collected from wild-type C57BL/6JNifdc mice (male, 9-week-old, n=3, +/Y; female, 11-week-old, n=3, +/+) and homozygous B-hFIX mice (male, 9-week-old, n=3, H/Y; female, 11-week-old, n=3, H/H). Protein expression level of FIX was analyzed by ELISA (Abcam, ab188393). Human FIX was exclusively detectable in male (A) and female (B) homozygous B-hFIX mice
Blood coagulation analysis in wild-type C57BL/6JNifdc mice and homozygous humanized B-hFIX mice. Plasma was collected from wild-type C57BL/6JNifdc mice (+/Y) and homozygous B-hFIX mice (H/Y) (male, 6-week-old, n=6). There was no significant difference in APTT TT and PT values between homozygous B-hFIX mice and wild-type mice. APTT: activated partial thromboplastin time. PT: Prothrombin time; TT: Thrombin time.