Strain Name |
C57BL/6N-Crbntm2(CRBN)Bcgen/Bcgen
|
Common Name | B-hCRBN mice |
Background | C57BL/6N | Catalog number | 113236 |
Aliases |
MRT2, MRT2A | ||
NCBI Gene ID |
51185 |
Description
Targeting strategy
Gene targeting strategy for B-hCRBN mice.The CDS of human CRBN gene that encodes the full-length protein was inserted into the mouse Crbn exons 2-3. The B-hCRBN mice will express the human CRBN protein, while mouse Crbn will no longer be expressed.
mRNA expression analysis in humanized B-hCRBN mice
Strain specific analysis of CRBN mRNA expression in wild-type C57BL/6 mice and homozygous B-hCRBN mice by RT-PCR. Heart, liver, spleen, lung, kidney, stomach, small intestine, colon and cortex RNA was isolated from wild-type C57BL/6 mice (+/+) and homozygous B-hCRBN mice (H/H), then cDNA libraries were synthesized by reverse transcription, followed by PCR with mouse or human CRBN primers. Mouse Crbn mRNA was detectable in wild-type C57BL/6 mice. Human CRBN mRNA was detectable only in homozygous B-hCRBN mice but not in wild-type mice.
Strain specific CRBN expression analysis in homozygous B-hCRBN mice by Western blot. The cortex, liver, spleen, lung, kidney, stomach, small intestine, colon and heart were collected from wild-type C57BL/6 mice (+/+) and homozygous B-hCRBN mice (H/H) and then analyzed by western blot with anti-CRBN antibody (CST, #71810). CRBN were detectable in both wild-type mice and homozygous B-hCRBN mice. The anti-CRBN antibody was cross-reactive between human and mouse.
Naive CD4+ T cells derived from B-hCRBN mice exhibited increased IL-2 secretion after treatment with Lenalidomide. Naive CD4+ T cells were collected from wild-type C57BL/6 mice (+/+) and homozygous B-hCRBN mice (H/H), then stimulated with DMSO or Lenalidomide (MCE, HY-A0003) in vitro for 24 hours. The supernatants were collected, and IL-2 production was measured by ELISA (Biolegend, 431004). The results show that Lenalidomide significantly up-regulates the production of IL-2 in B-hCRBN mice, but not in wild-type C57BL/6 mice.
In vivo toxicity of CC-885
In vivo toxicity of CC-885 in C57BL/6N mice and homozygous B-hCRBN mice. Wild-type C57BL/6 mice and homozygous B-hCRBN mice were each divided into two groups (n=3), receiving either 5 mg/kg CC-885 (CC-885, HY-101488) or vehicle control via intraperitoneal injection. (A) Percent survival. (B) Body weight and body weight change during the treatment. Results demonstrated that all CC-885-treated B-hCRBN mice succumbed at approximately 35 hours post-injection, whereas CC-885-administered wild-type C57BL/6 mice and all control groups survived. The results show that CC-885 exhibits marked toxicity exclusively in B-hCRBN mice, with no detectable toxicity observed in wild-type mice.
Hematology analysis
Complete blood count (CBC) of C57BL/6 and B-hCRBN mice. Values are expressed as mean ± SD.
Biochemistry analysis
Biochemical test of C57BL/6 and B-hCRBN mice. Values are expressed as mean ± SD.
Gross anatomy of female and male C57BL/6 mice
The organs of female and male C57BL/6 mice (10-week-old, n=10).
Gross anatomy of female and male B-hCRBN mice
The organs of female and male B-hCRBN mice (10-week-old, n=10).
Organ weight
Average weight of the main organs of C57BL/6 and B-hCRBN mice. Values are expressed as mean ± SD.
H&E staining in C57BL/6
Histopathological analysis of organs in C57BL/6 mice. The main organs of C57BL/6 were isolated at 10 weeks of age and analyzed with H&E staining (male, n=10; female, n=10). Results showed that no obvious abnormalities were found in all of the organs (brain, heart, lung, liver, spleen, stomach, small intestine, colon, kidney, ovary, uterus and testis). Scale bar: 100 μm.
H&E staining in B-hCRBN mice
Histopathological analysis of organs in B-hCRBN mice. The main organs of B-hCRBN mice were isolated at 10 weeks of age and analyzed with H&E staining (male, n=10; female, n=10). Results showed that no obvious abnormalities were found in all of the organs (brain, heart, lung, liver, spleen, stomach, small intestine, colon, kidney, ovary, uterus and testis). Scale bar: 100 μm.