Basic Information
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Gene targeting strategy
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Gene targeting strategy for B-hPD-1/hPD-L1 mice. The exon 2 of mouse PD-1 gene that encodes the IgV domain was replaced by human PD-1 exon 2 in B-hPD-1/hPD-L1 mice. The exon 3 of mouse Pdl1 gene that encodes the IgV domain was replaced by human PD-L1 exon 3 in B-hPD-1/hPD-L1 mice. This double knock-in model, was developed by breeding the B-hPD-1 mice and the B-hPD-L1 mice.
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mRNA expression analysis
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Species-specific PD-1 and PD-L1 gene expression analysis in wild-type and humanized B-hPD-1/hPD-L1 mice by RT-PCR. Mouse Pd-1 and PD-L1 mRNAs were detected in splenocytes isolated from wild-type C57BL/6 (+/+) mice, while human PD-1 and PD-L1 mRNAs were detected in homozygous B-hPD-1/hPD-L1 (H/H) mice.
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Protein expression analysis
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Species-specific PD1 and PD-L1 protein expression analysis in wild-type and humanized B-hPD-1/hPD-L1 mice. Splenocytes were isolated from wild-type C57BL/6 (+/+) and homozygous B-hPD-1/hPD-L1 mice (H/H) stimulated with anti-CD3ε in vivo, and analyzed by flow cytometry using species-specific anti-PD-1 and anti-PD-L1 antibodies. Mouse PD-1 and PD-L1 proteins were detected in wild-type mice, while human PD-1 and PD-L1 proteins were detected in B-hPD-1/hPD-L1 mice.
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In vivo efficacy evaluation of anti-human PD-1 and PD-L1 antibodies
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Antitumor activity of anti-human PD-1 antibody in B-hPD-1/hPD-L1 mice. (A) Anti-human PD-L1 antibody Pembrolizumab (in house) inhibited MC38-hPD-L1 tumor growth in B-hPD-1/hPD-L1 mice. Murine colon cancer MC38-hPD-L1 cells (5×105) were subcutaneously implanted into homozygous B-hPD-1/hPD-L1 mice (male, 8-week-old, n=5). Mice were grouped when tumor volume reached approximately 80mm3, at which time they were treated with anti-human PD-1 antibody with doses and schedules indicated in panel. (B) Body weight changes during treatment. As shown in panel A, different doses of human PD-1 antibody inhibited tumor growth in different levels, demonstrating that the B-hPD-1/hPD-L1 mice provide a powerful preclinical model for in vivo evaluation of anti-human PD-1 antibodies. Values are expressed as mean ± SEM.
Antitumor activity of anti-human PD-L1 antibody in B-hPD-1/hPD-L1 mice. (A) Anti-human PD-L1 antibody atezolizumab (in house) inhibited MC38-hPD-L1 tumor growth in B-hPD-1/hPD-L1 mice. Murine colon cancer MC38-hPD-L1 cells (5×105) were subcutaneously implanted into homozygous B-hPD-1/hPD-L1 mice (male, 5-week-old, n=5). Mice were grouped when tumor volume reached approximately 100 mm3, at which time they were treated with anti-human PD-L1 antibody with doses and schedules indicated in panel. (B) Body weight changes during treatment. As shown in panel A, different doses of human PD-L1 antibody inhibited tumor growth in different levels, demonstrating that the B-hPD-1/hPD-L1 mice provide a powerful preclinical model for in vivo evaluation of anti-human PD-L1 antibodies. Values are expressed as mean ± SEM.
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Publications using B-hPD-1/hPD-L1 mice
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Related products
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