20. Survey of TNF-α concentration and its correlation with leukocyte indicators in mice treated with anti-PD-1 monoclonal antibody and CAR-T cells combination

Nguyen Thi Hien Hanh, Can Van Mao, Bui Khac Cuong

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Abstract

The purpose of the study is to evaluate the correlation between leukocyte indices and TNF-α levels of combination therapy of monoclonal antibody that inhibits PD-1 with CAR-T cells in the experimental animal models. We conducted an experimental, prospective, interventional study with a control group. 60 white mice were divided into 4 groups, each group of 15 animals including a control group, CAR-T cell treatment group, PD-1 inhibitor monoclonal antibody treatment group, and PD-1 combined with CAR-T cells group. After treatment, all mice were monitored for whole body condition. Their white blood cell indices and TNF-α levels were measured. TNF-α concentration in the CAR-T group was not different from the control group. TNF-α levels in the PD-1 inhibitor monoclonal antibody combined with CAR-T cells increased statistically significantly compared to the control group (p < 0.001). There is a positive correlation between TNF-α concentration and the absolute number of monocytes in the treatment group of monoclonal antibody that inhibits PD-1 combined with CAR-T cells (r = 0.578; p < 0.05 ). Through this research, we found that combining anti-PD-1 monoclonal antibodies with CAR-T cells increased TNF-α levels in mice and there was a positive correlation between TNF-α concentration and monocyte count.

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References

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