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Evaluation of the in vivo efficacy of immune-oncology drugs targeting stimulatory immune checkpoint molecules using humanized knock-in mice
We generated humanized knock-in mice to evaluate the in vivo efficacy of human IO antibodies. For example, human OX40 knock-in (B-hOX40) mice were generated with a chimeric OX40 receptor, which is recognizable by stimulatory human OX40 antibodies. Additionally, more knock-in mice targeting stimulatory immune checkpoint molecules were developed and validated, such as B-hCD137, B-hGITR, B-hCD27, B-hCD40, B-hCD28, B-hCD3 et al,.
Humanized double knock-in mouse models for evaluating in vivo efficacy of the combination therapy of immune-oncology drugs
We generated humanized double knock-in mouse to evaluate the in vivo efficacy of combination therapy. For example, humanized double Knock-in B-hPD-1/hOX40 mice pairing with mouse cancer cells, demonstrated a synergistic effect of using hPD-1 and hOX40 antibodies.
Humanized knock-in mouse models for evaluating in vivo efficacy of immune-oncology drugs targeting inhibitory immune checkpoint molecules
In most cases, a human monoclonal antibody does not have mouse cross-reactivity. Therefore, we generated humanized knock-in mouse to evaluate the in vivo efficacy of human IO antibodies. For example, human PD-1 knock-in (B-hPD-1) mice were generated with a chimeric PD-1 receptor, which is recognizable by human PD-1 antibodies, and can be used to test human PD-1 antibody in vivo efficacy.
The B-NDG mouse is a perfect tool for immune system humanization and patient derived xenograft transplantation
The B-NDG mice (NOD-Prkdcscid Il2rgtm1/Bcgen), independently developed by Biocytogen, display a severe immunodeficiency phenotype, with no mature T, B or functional NK cells, and deficient in cytokine signaling. The B-NDG mouse is one of the best models for reconstitution of human immune system using peripheral blood mononuclear cells (PBMC) or hematopoietic stem cells (CD34+).

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